id int64 5 1.93M | title stringlengths 0 128 | description stringlengths 0 25.5k | collection_id int64 0 28.1k | published_timestamp timestamp[s] | canonical_url stringlengths 14 581 | tag_list stringlengths 0 120 | body_markdown stringlengths 0 716k | user_username stringlengths 2 30 |
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1,893,868 | Why HTML is Not a Programming Language? | Understanding HTML HTML stands for HyperText Markup Language. It's the standard language... | 0 | 2024-06-19T17:29:47 | https://dev.to/richardshaju/why-html-is-not-a-programming-language-30g3 | html, programming, web, tech | ## Understanding HTML
HTML stands for HyperText Markup Language. It's the standard language used to creUnderstanding HTML
HTML stands for HyperText Markup Language. It's the standard language used to create web pages. When you visit a website, what you see is made up of HTML. It's like the skeleton of a web page, providing the basic structure.
**What HTML Does**
HTML uses tags to tell the web browser how to display content. For example:
- h1 tag is used for main headings.
- p tag is used for paragraphs.
- a tag is used for links.
These tags wrap around content to give it meaning and structure. They don't do any calculations or perform any actions. They just tell the browser what each part of the content is.
## What is a Programming Language?
A programming language is used to write instructions that a computer can follow. These instructions can perform complex tasks like:
- Making decisions (if this happens, do that).
- Repeating actions (do this action 10 times).
- Calculating and processing data (add these numbers together).
Examples of programming languages include Python, JavaScript, and C++. They can create applications, games, and more by using logic and control flow.
**Key Differences**
- Structure vs. Action:
- Static vs. Dynamic:
- No Logic in HTML:
## Working Together
- While HTML is not a programming language, it often works alongside them. For example:
- CSS (Cascading Style Sheets): Used with HTML to style the content (colors, fonts, layout).
- JavaScript: Used to add interactivity (like responding to button clicks or validating forms).
Think of HTML as the building blocks of a web page, CSS as the paint and decorations, and JavaScript as the electricity that makes everything work.
## Conclusion
In simple terms, HTML is like the blueprint of a house. It shows where everything goes but doesn't build the house or make things work. A programming language, on the other hand, is like the tools and machinery that actually build the house and make things function. So, while HTML is crucial for web development, it’s not a programming language because it doesn’t perform actions or handle logic. | richardshaju |
1,893,865 | Skill Development and Education - Building a Knowledge-Based Economy . | for more about this just click on this link | 0 | 2024-06-19T17:27:46 | https://dev.to/tegveer_singh_8c7c2ac99ea/skill-development-and-education-building-a-knowledge-based-economy--444c | for more about this just click on this link [](https://www.dayitwa.org.in/) | tegveer_singh_8c7c2ac99ea | |
1,893,864 | bartowski/DeepSeek-Coder-V2-Lite-Instruct-GGUF-torrent | https://aitorrent.zerroug.de/bartowski-deepseek-coder-v2-lite-instruct-gguf/ | 0 | 2024-06-19T17:26:50 | https://dev.to/zerroug/bartowskideepseek-coder-v2-lite-instruct-gguf-torrent-14ek | ai, machinelearning, llm, beginners | https://aitorrent.zerroug.de/bartowski-deepseek-coder-v2-lite-instruct-gguf/ | zerroug |
1,893,863 | The significance of leadership in socio-economic development. | dayitwa, a pioneering organization, is committed to fostering leadership and driving socio-economic... | 0 | 2024-06-19T17:25:20 | https://dev.to/tegveer_singh_8c7c2ac99ea/the-significance-of-leadership-in-socio-economic-development-1kgi | dayitwa, a pioneering organization, is committed to fostering leadership and driving socio-economic transformation in India. Through its innovative programs, Dayitwa empowers individuals to become changemakers in their communities, addressing pressing challenges and creating sustainable solutions. This blog will delve into the mission, vision, and core values that guide Dayitwa's initiatives.
for more knowledge about this just click on this link : [](https://www.dayitwa.org.in/)
| tegveer_singh_8c7c2ac99ea | |
1,892,557 | How To Create Modern Emails Using React | If you have ever tried to create a nice-looking emails with HTML, you probably had a bad experienced... | 0 | 2024-06-19T17:24:33 | https://antondevtips.com/blog/how-to-create-modern-emails-using-react | react, webdev, javascript, frontend | ---
canonical_url: https://antondevtips.com/blog/how-to-create-modern-emails-using-react
---
If you have ever tried to create a nice-looking emails with HTML, you probably had a bad experienced while styling email letters with inline CSS properties.
All due to the limited support for external stylesheets in email clients.
Styling the emails has been a challenge due to inconsistent support for CSS across different email clients.
The common approach is to use inline CSS and tables for layout, ensuring compatibility across various clients.
You probably want to use CSS files to style the email, or use your favourite frontend framework.
If you only could use React to create emails...
And you can, really! In today's post we'll dive into how to use React to create beautiful and modern emails without stress.
> On my webite: [antondevtips.com](https://antondevtips.com/blog/how-to-create-modern-emails-using-react?utm_source=newsletter&utm_medium=email&utm_campaign=18_06_24) I already have blogs about React. Subscribe as more are coming.
## How To Create Emails with React
There is a library, called [react-email](https://react.email/), that is designed to make email creation easier and more efficient by using the component-based architecture of React.
It allows developers to build and style emails using familiar React components, providing better development experience, reusability and maintainability.
### Installing the React Email Library
There are two ways to get started with **react-email** library:
* create a new project automatically from a template
* manually add react-email into an existing project
In today's post we'll explore the 1st option as it is more popular.
First, you need to create a project:
```bash
npx create-email@latest
```
This will create a new folder **react-email-starter** with some email templates.
Then install the dependencies:
```bash
npm install
```
Run the web application and open http://localhost:3000/ in your web browser:
```bash
npm run dev
```
In this page, you can do the following:
1. Select and view a built-in email templates or new templates that you've created
2. View email on PC screen or mobile screen. Or view the code.
3. Send a letter on your email to see how it is rendered in the real email client.
An ability to view code is what this library was built for:
You create an email using React, and the library does all dirty work for you to transform React components to HTML tags with inline styles that email clients can visualize.
It's a complete win, you don't need to spend hours and nights trying to create a good-looking emails.
There still could be some limitations, but they could be resolved more easily in React.
## Creating a First Letter Using React Email
You have two options, either you can use the `@react-email/components` NPM package to get all the components or install each component as a separate option if you want your bundle to be a small as possible.
When creating a project from a template the `@react-email/components` package is installed.
Let's create our first email. First add a new file into the emails folder, let's call it "WelcomeEmail":
We are going to add some styling to our email, here is a full code:
```tsx
export const WelcomeEmail = () => {
return (
<Html lang="en">
<Body style={body}>
<h1>Welcome to the Email</h1>
<Button href="https://example.com" style={button}>
Confirm your email here
</Button>
</Body>
</Html>
);
};
const body = {
fontFamily: '-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Ubuntu,sans-serif'
};
const button = {
backgroundColor: "#0095ff",
border: "1px solid #0077cc",
fontSize: "17px",
lineHeight: "17px",
padding: "13px 17px",
borderRadius: "4px",
color: "#fff",
width: "200px",
};
export default WelcomeEmail;
```
After saving the file, in the web browser at http://localhost:3000/ you can see a new email without refreshing a page:
It's important to have an `export default WelcomeEmail`, otherwise a new email won't appear in the left panel.
You can find a lot of ready email examples [on the official website](https://demo.react.email/preview/magic-links/aws-verify-email).
## React Email Components
**React-Email** library has the following components for creating emails:
* Html - corresponds to regular `<html>` tag
* Head - corresponds to regular `<head>` tag
* Button - a link that is styled to look like a button
* Container - a layout component that centers all the content inside
* CodeBlock - display code with a selected theme and regex highlighting using Prism.js
* CodeInline - display a predictable inline code HTML element that works on all email clients
* Column - display a column that separates content areas vertically in your email. A column needs to be used in combination with a Row component.
* Row - display a row that separates content areas horizontally in your email.
* Font - sets a font
* Heading - corresponds to a heading tag (h1, h2, etc)
* Hr - display a divider that separates content areas in your email
* Image - just an image
* Link - a hyperlink to web pages, email addresses, or anything else a URL can address
* Markdown - converts markdown (MD content) to valid react-email template code
* Preview - a preview text that will be displayed in the inbox of the recipient
* Section - display a section that can also be formatted using rows and columns
* Tailwind - a React component to wrap emails with Tailwind CSS
* Text - a block of text separated by blank spaces
You can read documentation with examples for each component on the [official website](https://react.email/docs/components/html).
## Rendering React Emails Into HTML
React-Email library under the hood uses a `render` package to transform React components into HTML:
```bash
npm install @react-email/render -E
```
```tsx
import { WelcomeEmail } from "./email";
import { render } from "@react-email/render";
const html = render(<WelcomeEmail />, {
pretty: true,
});
console.log(html);
```
If you need a minified version of HTML, set the `pretty` prop to `false`.
If you need plain text instead of HTML, set the `plainText` prop to `true`.
## React Email Integrations
After you have an HTML content for your email crafted from React components, you can integrate with any email service provider.
You can use the following email providers with React Email:
* Resend
* Nodemailer
* SendGrid
* Postmark
* AWS SES
* MailerSend
* Plunk
Find out more information about these integrations on the [official web site](https://react.email/docs/integrations/overview).
Hope you find this blog post useful. Happy coding!
> On my webite: [antondevtips.com](https://antondevtips.com/blog/how-to-create-modern-emails-using-react?utm_source=newsletter&utm_medium=email&utm_campaign=18_06_24) I already have blogs about React. **Subscribe** as more are coming. | antonmartyniuk |
1,893,862 | cognitivecomputations/dolphin-2.9.2-qwen2-7b-torrent | https://aitorrent.zerroug.de/cognitivecomputations-dolphin-2-9-2-qwen2-7b-torrent/ | 0 | 2024-06-19T17:23:21 | https://dev.to/zerroug/cognitivecomputationsdolphin-292-qwen2-7b-torrent-20kh | ai, machinelearning, beginners | https://aitorrent.zerroug.de/cognitivecomputations-dolphin-2-9-2-qwen2-7b-torrent/ | zerroug |
1,893,844 | Hello All | Love this site. Well put together and maintained. | 0 | 2024-06-19T16:54:28 | https://dev.to/roy_silva_64eb848150e83d1/hello-all-1gba | Love this site. Well put together and maintained. | roy_silva_64eb848150e83d1 | |
1,889,714 | One Byte Explainer : NP-Complete Problems | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-19T17:15:02 | https://dev.to/debjde6400/one-byte-explainer-np-complete-problems-45af | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
## Explainer
Are you talking about a CS problem and its solution, such that you can prove your solution without getting frustrated? Can you convert other similar CS problems to your problem, but don't know how to accurately solve your problem yet? You have an NP-complete problem in your hand.
## Additional Context
CS - Computer Science.
NP-Complete - Non-deterministic Polynomial Complete problem.
Proving your solution for a problem without getting frustrated means that the correctness of the solution for the problem can be checked with polynomial time complexity, like O(n<sup>2</sup>) or even O(n<sup>10</sup>).
<!-- Don't forget to add a cover image to your post (if you want). --> | debjde6400 |
1,893,859 | Belajar Membuat Project Pertama Laravel | Installasi laravel menggunakan composer composer create-project laravel/laravel project-name ... | 0 | 2024-06-19T17:14:53 | https://dev.to/ryotwell/belajar-membuat-project-pertama-laravel-5gll | webdev, beginners, programming, laravel | Installasi laravel menggunakan composer
```bash
composer create-project laravel/laravel project-name
```
Sekarang buka project nya dengan mengetik
```bash
cd project-name
```
Jalankan local server
```bash
php artisan serve
```
Sekarang buka `http://localhost:8000` dan jadi.
| ryotwell |
1,893,857 | Unlocking the Power of GPT Models: Your Guide to Innovative AI Tools | In the rapidly evolving world of artificial intelligence, GPT models are at the forefront of... | 0 | 2024-06-19T17:14:36 | https://dev.to/matin_mollapur/unlocking-the-power-of-gpt-models-your-guide-to-innovative-ai-tools-4ii1 | ai, programming, productivity, learning | In the rapidly evolving world of artificial intelligence, GPT models are at the forefront of revolutionizing how we interact with technology. This article explores some of the most innovative GPT models that can enhance your productivity, creativity, and learning experiences.
#### Academic Tools for Researchers and Students
1. **[Academic Writer](https://github.com/ai-boost/Awesome-GPTs#academic-writer)**
- **Description**: A tool that assists in writing, reading, and refining academic papers.
- **Use Case**: Perfect for drafting research papers, generating citations, and summarizing complex texts.
2. **[Auto Literature Review](https://github.com/ai-boost/Awesome-GPTs#auto-literature-review)**
- **Description**: Automates the process of conducting literature reviews by searching relevant papers.
- **Use Case**: Saves time for researchers by quickly gathering and summarizing the latest research in their field.
3. **[Scholar GPT Pro](https://github.com/ai-boost/Awesome-GPTs#scholar-gpt-pro)**
- **Description**: Provides access to over 216 million academic papers for enhanced research capabilities.
- **Use Case**: Ideal for in-depth research projects requiring extensive literature reviews.
#### Writing Assistants for Content Creators
1. **[Prompt Engineer](https://github.com/ai-boost/Awesome-GPTs#prompt-engineer)**
- **Description**: Helps create effective prompts for various GPT models.
- **Use Case**: Enhances the quality of interactions with AI by generating precise and useful prompts.
2. **[All-around Writer](https://github.com/ai-boost/Awesome-GPTs#all-around-writer)**
- **Description**: A versatile writing assistant capable of handling essays, articles, and creative writing.
- **Use Case**: Supports writers in generating high-quality content quickly and efficiently.
3. **[Paraphraser & Humanizer](https://github.com/ai-boost/Awesome-GPTs#paraphraser--humanizer)**
- **Description**: Refines and humanizes text to improve readability and avoid plagiarism.
- **Use Case**: Useful for rephrasing content while maintaining its original meaning and avoiding duplicate content issues.
#### Educational Aids for Lifelong Learners
1. **[All-around Teacher](https://github.com/ai-boost/Awesome-GPTs#all-around-teacher)**
- **Description**: Provides quick lessons on a wide range of topics.
- **Use Case**: Great for students and lifelong learners seeking to understand new concepts quickly.
2. **[Stats and ML Helper](https://github.com/ai-boost/Awesome-GPTs#stats-and-ml-helper)**
- **Description**: Simplifies complex statistics and machine learning concepts.
- **Use Case**: A valuable resource for students and professionals looking to grasp difficult subjects in data science.
#### Productivity Enhancers for Developers
1. **[Logo Designer](https://github.com/ai-boost/Awesome-GPTs#logo-designer)**
- **Description**: Creates professional logos in various styles.
- **Use Case**: Ideal for entrepreneurs and businesses needing quick and unique logo designs.
2. **[Test-Driven Code Companion](https://github.com/ai-boost/Awesome-GPTs#test-driven-code-companion)**
- **Description**: Assists in writing safe and proven code using test-driven development principles.
- **Use Case**: Essential for developers aiming to improve code quality and reliability.
### Conclusion
The versatility of GPT models extends across various domains, from academic research and content creation to education and software development. By leveraging these innovative tools, you can enhance your productivity, creativity, and learning experiences, staying ahead in the competitive landscape of technology and AI. Explore these tools and see how they can transform your workflow today. | matin_mollapur |
1,893,231 | Global or Local Minima and Maxima and Saddle Points in Deep Learning | <Global and Local Minima> A global minimum is the globally minimal point whose... | 0 | 2024-06-19T17:13:18 | https://dev.to/hyperkai/global-or-local-minima-and-maxima-and-saddle-points-in-deep-learning-2nn3 | deeplearning, minima, maxima, saddlepoints | ### <**Global and Local Minima**>
- A global minimum is the globally minimal point whose gradient is zero but not a local minimum.
- A local minimum is the locally minimal point whose gradient is zero but not a global minimum.
*Memos:
- I used [math3d](https://www.math3d.org/).
- The left formula is 10x/e^(x^2+y^2)(-x)^e. *`x∈` is [-3, 3] and `y∈` is [-3, 3].
- The right formula is -4x/e^(x^2+y^2)(x)^e. *`x∈` is [-3, 3] and `y∈` is [-3, 3].
___
### <**Global and Local Maxima**>
- A global maximum is the globally maximal point whose gradient is zero but not a local maximum.
- A local maximum is the locally maximal point whose gradient is zero but not a global maximum.
*Memos:
- I used [math3d](https://www.math3d.org/).
- The left formula is -10x/e^(x^2+y^2)(-x)^e. *`x∈` is [-3, 3] and `y∈` is [-3, 3].
- The right formula is 4x/e^(x^2+y^2)(x)^e. *`x∈` is [-3, 3] and `y∈` is [-3, 3].
___
### <**Saddle Points**>
A saddle point is the combination point of a local minimum and maximum.
*Memos:
- I used [math3d](https://www.math3d.org/).
- The formula is x^2-y^2. *`x∈` is [-4, 4] and `y∈` is [-4, 4]. | hyperkai |
1,893,856 | Learning to Code: My CS50 Story | A few months ago, I was completely clueless about what to do in my programming journey. Then, due to... | 0 | 2024-06-19T17:12:24 | https://dev.to/ashish_nagmoti/learning-to-code-my-cs50-story-ll | webdev, beginners, programming, productivity | A few months ago, I was completely clueless about what to do in my programming journey. Then, due to advice from some YouTubers and friends, I embarked on my CS50 journey. I must say—what an experience it was!
### I completed my CS50 course a few weeks ago
- By exploring, learning, failing, and understanding various technologies such as Scratch, C, data structures, memory management, HTML, CSS, SQLite, Python, JavaScript, and Flask.
- Learning the basics of all these technologies in such a short time with such amazing explanations and creative demonstrations was incredible.
- The problem sets associated with each week were really challenging and sharpened my knowledge and programming skills.
- 
### Problem Sets
- To be honest, the problem sets were one of the best things, and Brian's short snippets explaining problems and solutions were amazing.
- The problem sets where we had to play with 64-bit math to convert normal images to various filters, the finance problem set where we had to figure out routing of GET and POST requests and various stuff in Flask, and Fiftyville where we had to catch a robber using database records were such enthralling experiences.
### Imposter Syndrome
- Although now I say it was such a great experience, when I was doing the course, I felt like an imposter all the time.
- I always doubted if I could really complete it, but then I had a friend who was doing the course with me. That really pushed me, and now here I am, writing a blog about completing it 🙂.
### Final Project
- When I arrived at the last part of the course to make a final project, I felt so confused about how to progress, what to make, and what technology to use, among many other questions.
- Then I tried to scan my own problems. I always had trouble hopping between two websites or apps for listening to lofi study beats and maintaining my to-do list. I thought, what if I could combine these two into one website?
- I know it's not a mind-blowing or world-changing website, but hey, at least I will use it.
- So I decided to make a website that combines productivity, i.e., lofi study beats, and habits, i.e., a to-do list.
- Website link:- [http://ashishnagmoti.pythonanywhere.com/](http://ashishnagmoti.pythonanywhere.com/)
- Tutorial Link:-[https://youtu.be/NlTR48V-_rs?si=qCaCIaMN0fsdA0YP](https://youtu.be/NlTR48V-_rs?si=qCaCIaMN0fsdA0YP)
-
### Conclusion
- My last but not least words will be that this is one of the most amazing things I have ever done in my learning journey. I definitely recommend it to anyone who wants to enter CS.
So this was my experience. Share your thoughts/experience in the comments. | ashish_nagmoti |
1,893,855 | Automate Your RKE2 Cluster with Ansible: Helm, Cert-Manager, Traefik, and Rancher Setup Made Easy | https://spaceterran.com/posts/Automate-Your-RKE2-Cluster-with-Ansible-Helm-Cert-Manager-Traefik-and-R... | 0 | 2024-06-19T17:12:06 | https://dev.to/spaceterran/automate-your-rke2-cluster-with-ansible-helm-cert-manager-traefik-and-rancher-setup-made-easy-3egg | https://spaceterran.com/posts/Automate-Your-RKE2-Cluster-with-Ansible-Helm-Cert-Manager-Traefik-and-Rancher-Setup-Made-Easy/ | spaceterran | |
1,893,853 | bartowski/Codestral-RAG-19B-Pruned-GGUF-torrent | https://aitorrent.zerroug.de/bartowski-codestral-rag-19b-pruned-gguf-torrent/ | 0 | 2024-06-19T17:08:52 | https://dev.to/zerroug/bartowskicodestral-rag-19b-pruned-gguf-torrent-128e | ai, machinelearning, beginners | https://aitorrent.zerroug.de/bartowski-codestral-rag-19b-pruned-gguf-torrent/ | zerroug |
1,893,852 | Looking to hire a Senior Full Stack Developer | What We're Looking For The ideal candidate should be a versatile full stack developer adept at... | 0 | 2024-06-19T17:07:29 | https://dev.to/yzahler/looking-to-hire-a-senior-full-stack-developer-3883 | career, angular, csharp, postgres | What We're Looking For
The ideal candidate should be a versatile full stack developer adept at building and scaling both back-end and front-end components of a robust, modern application.
Tasks and Responsibilities
Architect, develop, and scale C# back-end services and Angular/Material UI front-end for a growing application
Optimizing PostgreSQL database
Integrating with Redis, SendGrid, Stripe, Snowflake, BigQuery
Refactoring legacy code
Driving continuous improvement
Education and Experience Requirements
5+ years software engineering, proficient in C# and Angular
Expertise in PostgreSQL, Redis, and integrating third-party services
Proven ability to deliver scalable, high-performance applications
Strong problem-solving, collaboration, and communication skills
Self-motivated, reliable, and quick learner
Start-up experience preferred
Programming Languages/Technologies (Required)
C#
Angular
Material UI
PostgreSQL
Programming Languages/Technologies (Bonus)
Flowbite
Tailwind CSS
Redis
SendGrid
Stripe
Snowflake
BigQuery
Our Tech Stack
Frontend: TypeScript, Angular 12
Backend: C#, Python (legacy)
Database: Postgres
| yzahler |
1,893,850 | Welcome to a new era of software building | Gearing up for an AI-powered world Humanity has beaten every prediction of its demise because of new... | 0 | 2024-06-19T17:01:50 | https://dev.to/gaw/welcome-to-a-new-era-of-software-building-3fpp | ai | Gearing up for an AI-powered world
Humanity has beaten every prediction of its demise because of new technology. To unlock human progress, we enlisted computers, our brothers in arms.
Since we’ve been gradually lending human intelligence to computers — they’ve become responsive building blocks. ChatGPT is the tool of the decade not because it’s more intelligent than you but because it responds to you intelligently.
At KushoAI, we believe that the job of technology is to empower people. We’re building AI agents trained for specific problems to unlock value at a pace faster than ever before.
The problem we’re solving is an underrated one: a hidden gem almost. There are more than 25 million developers globally — all with a common problem. Developers quietly shipping code (undisturbed) is a myth in modern software teams.
The software development life cycle requires perfect functioning of many complex variables while the JTBDs for developers keep increasing…
At KushoAI, we’re building AI agents that will give developers an extra pair of eyes and hands. A secret helper that takes care of the parts of a developer’s job they keep pushing to the next day, for example, testing or system health.
The best part is that KushoAI is trained for a special purpose (unlike some MCU heroes who have to save humanity) we’re thinking only of the millions of software developers whose lives can be more productive, creative, and happier.
If you’re a developer keen to be one of the first to use our AI agents, you can DM us at https://twitter.com/kushoai or https://in.linkedin.com/company/kusho.
Steve Jobs famously said that a computer is a bicycle for the mind, and if we stretch that metaphor across the 21st century, it’s clear that AI is nothing short of a racecar.
Thank you for reading and joining us on this journey. | gaw |
1,893,845 | Ratatui for Terminal Fireworks: using Rust TUI Canvas | Ratatui for Terminal Fireworks 🧨 cooking up a fireworks or confetti show in the Terminal using Rust Text-based UI (TUI) tooling 🖥. | 0 | 2024-06-19T17:00:01 | https://rodneylab.com/ratatui-for-terminal-fireworks/ | rust, gamedev, tui | ---
title: "Ratatui for Terminal Fireworks: using Rust TUI Canvas"
published: "true"
description: "Ratatui for Terminal Fireworks 🧨 cooking up a fireworks or confetti show in the Terminal using Rust Text-based UI (TUI) tooling 🖥."
tags: "rust, gamedev, tui"
canonical_url: "https://rodneylab.com/ratatui-for-terminal-fireworks/"
cover_image: "https://dev-to-uploads.s3.amazonaws.com/uploads/articles/r7n1vbv0qc2wu0n0vxuq.png"
---
## 🧨 Adding Fireworks to the Ratatui Game
In this Ratatui for Terminal Fireworks post, I talk about how I added fireworks to the Text-based User Interface (**TUI**) game I created in a recent post. The game is based on the arithmetic challenge from the UK TV quiz, Countdown. The Ratatui game worked already, but was little more than a minimal viable product.
I mentioned some rough corners worth focussing on in that previous post. One of those rough corners was adding some **confetti** or **fireworks** to the results screen when the player achieves a perfect score. In this post, I take a quick look at how I added fireworks using the Ratatui canvas. There is a link to the latest project repo, with full code further down.
## 🧱 Ratatui for Terminal Fireworks: What I Built
The game stayed mostly as it was, and only the victory screen changed, adding a fireworks animation using a Ratatui canvas widget if the player got a perfect score.
## 🧑🏽🎓 Ratatui Examples
In the <a href="https://rodneylab.com/trying-ratatui-tui/">post on Trying Ratatui TUI</a>, I listed some resources for getting started with Ratatui, including three official tutorials. Those tutorials focus on text-content, and the <a href="https://docs.rs/ratatui/latest/ratatui/widgets/canvas/struct.Canvas.html">Ratatui Canvas widget</a> is a better match for the fireworks animation, as I would want to draw shapes to the window at arbitrary locations.
Luckily, there is another invaluable resource for getting started with Ratatui: <a href="https://github.com/ratatui-org/ratatui/tree/main/examples">the examples in Ratatui’s GitHub repo</a>.
The canvas examples within the repo and more specifically, the Pong frame, within that collection was super helpful in getting going here, as it included example code on timing in Ratatui.
## 🎆 Fireworks Alternative
There is an alternative for adding fireworks, worth a mention. That combines Ratatui with the <a href="https://rodneylab.com/rust-for-gaming/#rust-for-gaming-bevy">Bevy Rust game engine</a>, calling Ratatui from within a Bevy app. This alternative approach uses <a href="https://github.com/joshka/bevy_ratatui">bevy_ratatui</a>. This lets you take advantage of Bevy features, such as its Entity Component System (ECS) and plugin ecosystem, while still rendering to the Terminal.
At the time of writing, bevy_ratatui is still experimental. Also, I already have a Ratatui app, and wanted to avoid re-writing it with Bevy, so decided to stick with Ratatui’s canvas widget for the firework animation. bevy_ratatui does look promising though, and I will probably try it in another project soon. Let me know if you have already tried it and have some feedback!
## 🖥️ My Approach using Ratatui Canvas
Creating and drawing to the canvas widget was not too complicated. I created a Rust Vec of firework Sparks structs. Each Spark struct had a colour (selected randomly at initialization) and current position and velocity values. I just needed to loop over that Spark Vec to display each of them on each render.
```rust
fn create_result_block_canvas<'a>(app: &'a App, sparks: &'a [Spark]) -> impl Widget + 'a {
match app.check_solution() {
Some(0) => Canvas::default()
.block(Block::default())
.marker(symbols::Marker::Dot)
.paint(move |ctx| {
for Spark {
x_position,
y_position,
colour,
..
} in sparks
{
ctx.draw(&Circle {
x: *x_position,
y: *y_position,
radius: 1.0,
color: *colour,
});
}
})
.x_bounds([-100.0, 100.0])
.y_bounds([-50.0, 50.0]),
None | Some(_) => Canvas::default(),
}
}
```
Ratatui uses immediate mode, so you have to redraw every element for each frame. I updated the position elements for each spark in an `on_tick` method, which also runs each frames, creating the appearance of moving sparks.
## 🙌🏽 Ratatui for Terminal Fireworks: Wrapping Up
In this Ratatui for Terminal fireworks post, I briefly ran through how I added fireworks to the Ratatui Countdown game. In particular, we saw:
- a link to **code examples for getting started with Ratatui**;
- the **bevy_ratatui app** as an alternative route to rendering in the Terminal; and
- some **code snippets and design choices for my own Ratatui game**.
I hope you found this useful. As promised, you can <a href="https://github.com/rodneylab/countdown-numbers">get the full project code on the Rodney Lab GitHub repo</a>. I would love to hear from you, if you are also new to Rust game development. Do you have alternative resources you found useful? How will you use this code in your own projects?
## 🙏🏽 Ratatui for Terminal Fireworks: Feedback
If you have found this post useful, see links below for further related content on this site. Let me know if there are any ways I can improve on it. I hope you will use the code or starter in your own projects. Be sure to share your work on X, giving me a mention, so I can see what you did. Finally, be sure to let me know ideas for other short videos you would like to see. Read on to find ways to get in touch, further below. If you have found this post useful, even though you can only afford even a tiny contribution, please <a aria-label="Support Rodney Lab via Buy me a Coffee" href="https://rodneylab.com/giving/">consider supporting me through Buy me a Coffee</a>.
Finally, feel free to share the post on your social media accounts for all your followers who will find it useful. As well as leaving a comment below, you can get in touch via <a href="https://twitter.com/messages/compose?recipient_id=1323579817258831875">@askRodney</a> on X (previously Twitter) and also, join the <a href="https://matrix.to/#/%23rodney:matrix.org">#rodney</a> Element Matrix room. Also, see <a aria-label="Get in touch with Rodney Lab" href="https://rodneylab.com/contact/">further ways to get in touch with Rodney Lab</a>. I post regularly on <a href="https://rodneylab.com/tags/gaming/">Game Dev</a> as well as <a href="https://rodneylab.com/tags/rust/">Rust</a> and <a href="https://rodneylab.com/tags/c++/">C++</a> (among other topics). Also, <a aria-label="Subscribe to the Rodney Lab newsletter" href="https://newsletter.rodneylab.com/issue/latest-issue">subscribe to the newsletter to keep up-to-date</a> with our latest projects.
| askrodney |
1,892,447 | Getting Started With Terraform For Infrastructure Provisioning 🛠️ | Infrastructure as Code (IaC) is a modern approach to managing and provisioning computing resources... | 0 | 2024-06-19T16:59:59 | https://dev.to/angelotheman/getting-started-with-terraform-for-infrastructure-provisioning-15hi | devops, terraform, cloud, architecture | Infrastructure as Code (IaC) is a modern approach to managing and provisioning computing resources through machine-readable configuration files rather than physical hardware or interactive configuration tools. This method allows for more consistent and scalable infrastructure management, enabling automation and reducing the risk of human error.
### Why Terraform?
Terraform, developed by [Hashicorp](https://www.hashicorp.com/) is one of the most popular IaC tools due to its open-source nature, flexibility, and support for multiple cloud platforms. It lets users define and provision data center infrastructure using a high-level configuration language.
In this article, you will learn how to use Terraform as an IaC tool.
## Understanding the Basics
### What is Terraform?
Terraform is an open-source Infrastructure as Code (IaC) tool that allows you to define and provision infrastructure using a high-level configuration language called **Hashicorp Configuration Language (HCL). **Terraform manages resources such as virtual machines, storage, and networking for various cloud providers through a **_declarative approach_**, where you simply define the desired state of your infrastructure and Terraform ensures that it matches that state.
### Overview of Architecture and Workflow
<strong><center>FIG 1.1</center></strong>
<strong><center>FIG 1.2</center></strong>
A typical Terraform workflow as shown in ***FIG 1.1*** involves:
1. Writing configuration files to define the desired state.
2. Initializing the configuration directory with `terraform init`.
3. Creating an execution plan with `terraform plan`.
4. Applying the changes with `terraform apply`.
5. Managing the infrastructure state and making updates as needed.
6. Destroying the infrastructure with `terraform destroy` if required.
### Key Components
#### Providers
Providers are responsible for managing the lifecycle of resources. They offer a set of resources and data sources that Terraform can manage. Each provider requires a configuration to define the credentials and regions where Terraform would operate. Examples of providers include AWS, Azure, GCP, etc.
Example configuration
```hcl
provider "aws" {
region = "us-east-1"
}
```
#### Resources
Resources are the fundamental building blocks of Terraform configurations. They represent components of your infrastructure, such as virtual machines, databases, or networking components. Each resource is defined with a type, name, and a set of properties.
Example resource definition:
```hcl
resource "aws_instance" "example" {
ami = "ami-0c55b159cbfafe1f0"
instance_type = "t2.micro"
}
```
#### Modules
Modules are reusable configurations that help organize and structure your code. They allow you to group multiple resources and encapsulate complex infrastructure patterns.
Example module usage
```hcl
module "vpc" {
source = "terraform-aws-modules/vpc/aws"
version = "2.77.0"
name = "my-vpc"
cidr = "10.0.0.0/16"
azs = ["us-east-1a", "us-east-1b"]
public_subnets = ["10.0.1.0/24", "10.0.2.0/24"]
private_subnets = ["10.0.3.0/24", "10.0.4.0/24"]
}
```
## Setting up your Environment
Visit the [Terraform downloads page](https://developer.hashicorp.com/terraform/install) and download or install the version of Terraform concerning your operating system.
For Linux systems (Ubuntu/Debian) follow this:
**STEP 1**
```shell
wget -O- https://apt.releases.hashicorp.com/gpg | sudo gpg --dearmor -o /usr/share/keyrings/hashicorp-archive-keyring.gpg
echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] https://apt.releases.hashicorp.com $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/hashicorp.list
sudo apt update && sudo apt install terraform
```
**STEP 2**
Verify the installation with this
```shell
Terraform –version
```
**STEP 3**
For this article, we will be provisioning our infrastructure using AWS.
Use [this link](https://docs.aws.amazon.com/cli/latest/userguide/getting-started-install.html) to install the **_aws cli_** for your operating system
**STEP 4**
Run `aws configure` to set your variables after installing the aws cli. Terraform needs to be able to use these credentials for infrastructure provisioning.
## Writing Your First Configuration
### Basic Configuration File
Terraform configuration files are written in Hashicorp Configuration Language (HCL). The basic structure as shown in **FIG 1.2 **above includes
#### **Provider Configuration:**
Specifies the cloud provider and its settings.
```hcl
provider "aws" {
region = "us-east-1"
}
```
#### **Resource Definition:**
Declares the resources to be managed.
```hcl
resource "aws_instance" "example" {
ami = "ami-0c55b159cbfafe1f0"
instance_type = "t2.micro"
}
```
**_resource:_** This tells Terraform that this is a resource block.
**_aws_instance:_** This is the actual resource we want to provision in aws.
**_example:_** This is a specific name given to the resource so that we can reference it elsewhere in our terraform code
#### Variables:
Defines variables for dynamic values.
```hcl
variable "ami_name" {
type = string
description = "The name of the machine image (AMI) to use for the server."
default = “ubuntu-local”
}
```
**_variable:_** This indicates a variable block.
**_ami_name:_** This is the name of the variable. Hence, it can be referenced anywhere in the terraform code.
**_description:_** The description should explain the variable and what value is expected.
**_default:_** If present, the variable is considered optional and the default value will be used if no value is set when calling the module or running Terraform.
#### Outputs:
Specify outputs to display after applying the configuration.
```hcl
output "instance_id" {
value = aws_instance.example.id
}
```
### Writing your first `main.tf` file
Create a directory for your terraform config files
```sh
mkdir terraform-practise
```
Create the `main.tf` file in this directory. This file would contain your Terraform configuration
```hcl
provider "aws" {
region = "us-east-1"
}
resource "aws_instance" "example" {
ami = "ami-0c55b159cbfafe1f0"
instance_type = "t2.micro"
}
```
Next, we initialize the directory
```sh
terraform init
```
### Understanding the Initialization Process and Its Output
* **Provider Plugins:** Terraform downloads the necessary provider plugins specified in your configuration. In our case aws.
* **Backend Initialization:** Terraform sets up the backend for storing the state of your infrastructure.
* **Directory Structure:** Terraform creates a `.terraform` directory to store the provider plugins and state files.
A sample output would look like this
```sh
Initializing the backend...
Initializing provider plugins...
- Finding latest version of hashicorp/aws...
- Installing hashicorp/aws v3.27.0...
- Installed hashicorp/aws v3.27.0 (signed by HashiCorp)
Terraform has been successfully initialized!
```
## Terraform Commands
To view the entire list of commands, do `terraform –help`. Here are some commands and their uses
* <strong><code>terraform init</code></strong>: Initializes a Terraform working directory by downloading the necessary provider plugins and setting up the backend for state management. This should be run first before any other terraform command.
* <strong><code>terraform fmt</code></strong>: This command is used to ensure the configuration files are properly formatted and easy to read. It helps maintain a consistent style across the files.
* <strong><code>terraform validate</code></strong>: Checks whether the configuration is valid.
* <strong><code>terraform plan</code></strong>: This command is used to preview the changes that Terraform will make to the infrastructure. It helps in verifying the resources that will be created, modified, or destroyed.
* <strong><code>terraform apply</code></strong>: This command executes the actions proposed in the execution plan. It prompts for approval before making any changes unless the <code>-auto-approve</code> flag is used.
* <strong><code>terraform destroy</code></strong>: This command is used to terminate and remove all resources defined in the Terraform configuration. It prompts for approval before making any changes unless the <code>-auto-approve</code> flag is used.
* <strong><code>terraform show</code></strong>: This command is used to inspect the current state of the infrastructure managed by Terraform. It can also show the details of a specific plan file.
* <strong><code>terraform refresh</code></strong>: This command reconciles the state file with the real-world resources to detect any drift between the two.
## Practical Example: Setting Up an EC2 Instance with a VPC
In this example, we will provision an EC2 instance within a VPC. This configuration will include
* Creating a VPC
* Subnets
* An internet gateway
* Route tables
* EC2 instance with appropriate security groups
For this demonstration, we will create a new folder in our main directory named ***learn-terraform-aws.***
```sh
mkdir learn-terraform-aws
cd learn-terraform-aws
```
We would then create our `main.tf` file responsible for holding our terraform configurations
```shell
touch main.tf
```
First, we will define the VPC resource in the `main.tf` file
```hcl
provider "aws" {
region = "us-east-1"
}
resource "aws_vpc" "main" {
cidr_block = "10.0.0.0/16"
tags = {
Name = "main-vpc"
}
}
```
Next, we define the public and private subnets within the VPC
```hcl
resource "aws_subnet" "public" {
vpc_id = aws_vpc.main.id
cidr_block = "10.0.1.0/24"
availability_zone = "us-east-1a"
tags = {
Name = "public-subnet"
}
}
resource "aws_subnet" "private" {
vpc_id = aws_vpc.main.id
cidr_block = "10.0.2.0/24"
availability_zone = "us-east-1a"
tags = {
Name = "private-subnet"
}
}
```
After this, we create our internet gateway to allow access to the VPC
```hcl
resource "aws_internet_gateway" "gw" {
vpc_id = aws_vpc.main.id
tags = {
Name = "main-gateway"
}
}
```
Define a route table and associate it with the public subnet
```hcl
resource "aws_route_table" "public" {
vpc_id = aws_vpc.main.id
route {
cidr_block = "0.0.0.0/0"
gateway_id = aws_internet_gateway.gw.id
}
tags = {
Name = "public-route-table"
}
}
resource "aws_route_table_association" "public" {
subnet_id = aws_subnet.public.id
route_table_id = aws_route_table.public.id
}
```
Now we create our EC2 Instance
```hcl
resource "aws_instance" "web" {
ami = "ami-0c55b159cbfafe1f0"
instance_type = "t2.micro"
subnet_id = aws_subnet.public.id
tags = {
Name = "web-server"
}
}
```
You would realize that we are simply declaring the state of our infrastructure like we would if we were to go to the AWS console. Also, The specific name of the resource blocks for our file is being reused as and when necessary. For instance, in the `aws_instance` resource, we made use of `aws_subnet.public.id` which is a named resource in our configuration telling terraform which resource to get this id from.
### Variables and Outputs
Add variables and outputs to make the configuration more flexible and provide useful information after the infrastructure is provisioned.
Create a `variables.tf` file and add this code
```hcl
variable "aws_region" {
description = "The AWS region to deploy resources"
default = "us-east-1"
}
variable "instance_type" {
description = "Type of EC2 instance"
default = "t2.micro"
}
```
Now create an `outputs.tf` file and add this code as well
```hcl
output "instance_id" {
value = aws_instance.web.id
}
output "public_ip" {
value = aws_instance.web.public_ip
}
```
Now ensure that all three files are in the same directory and run the following commands
STEP 1. Initialize the directory
```shell
terraform init
```
STEP 2. Create an Execution Plan
```shell
terraform plan
```
STEP 3. Apply the configuration
```shell
terraform apply
```
STEP 4. After `terraform apply` is complete, you will see the instance ID and public IP of the newly created EC2 instance.
## Reference Links
* [Terraform Documentation](https://developer.hashicorp.com/terraform/docs)
* [Infrastructure as Code (IaC)](https://aws.amazon.com/what-is/iac/)
## Conclusion
In this article, we've explored the foundational aspects of using Terraform for infrastructure provisioning. From understanding the core concepts and basic commands to diving into practical scenarios like setting up an EC2 instance with a VPC, we've covered essential topics that will help you get started with Terraform.
Reach out to me via [LinkedIn](https://www.linkedin.com/in/angelotheman) , [X](https://x.com/angelotheman) via [Email](mailto:kwabenaatwumasi@gmail.com).
Happy Learning 🚀
| angelotheman |
1,893,849 | bartowski/Hercules-5.0-Qwen2-1.5B-GGUF-torrent | https://aitorrent.zerroug.de/bartowski-hercules-5-0-qwen2-1-5b-gguf-torrent/ | 0 | 2024-06-19T16:59:49 | https://dev.to/zerroug/bartowskihercules-50-qwen2-15b-gguf-torrent-4jbo | ai, machinelearning, beginners | https://aitorrent.zerroug.de/bartowski-hercules-5-0-qwen2-1-5b-gguf-torrent/ | zerroug |
1,893,848 | bartowski/MadWizardOrpoMistral-7b-v0.3-GGUF-torrent | https://aitorrent.zerroug.de/bartowski-madwizardorpomistral-7b-v0-3-gguf/ | 0 | 2024-06-19T16:58:47 | https://dev.to/zerroug/bartowskimadwizardorpomistral-7b-v03-gguf-torrent-2g4j | ai, machinelearning, beginners | https://aitorrent.zerroug.de/bartowski-madwizardorpomistral-7b-v0-3-gguf/ | zerroug |
1,893,847 | Step-by-Step Instructions for Task Management Apps | Table of Contents Introduction Project Setup Backend Setup Frontend Setup User... | 0 | 2024-06-19T16:57:12 | https://raajaryan.tech/step-by-step-instructions-for-task-management-apps | javascript, node, react, beginners | [](https://buymeacoffee.com/dk119819)
**Table of Contents**
1. [Introduction](#introduction)
2. [Project Setup](#project-setup)
- [Backend Setup](#backend-setup)
- [Frontend Setup](#frontend-setup)
3. [User Authentication](#user-authentication)
- [User Registration](#user-registration)
- [User Login](#user-login)
- [JWT Authentication](#jwt-authentication)
4. [Task CRUD Operations](#task-crud-operations)
- [Create Task](#create-task)
- [Read Tasks](#read-tasks)
- [Update Task](#update-task)
- [Delete Task](#delete-task)
5. [Task Categories](#task-categories)
- [Add Task to Categories](#add-task-to-categories)
- [Filter Tasks by Category](#filter-tasks-by-category)
6. [UI/UX Design](#uiux-design)
- [Responsive Design](#responsive-design)
- [User-Friendly Interface](#user-friendly-interface)
- [Drag-and-Drop Functionality](#drag-and-drop-functionality)
7. [Notifications](#notifications)
- [Email Notifications](#email-notifications)
- [In-App Notifications](#in-app-notifications)
8. [Collaboration](#collaboration)
- [Share Tasks](#share-tasks)
- [Assign Tasks](#assign-tasks)
9. [Complete Code Integration](#complete-code-integration)
10. [Final Thoughts](#final-thoughts)
---
<a name="introduction"></a>
### Introduction
This guide provides a comprehensive step-by-step approach to developing a task management application using the MERN stack. The project includes user authentication, task CRUD operations, task categorization, a responsive and intuitive UI, notification features, and collaboration capabilities.
<a name="project-setup"></a>
### Project Setup
#### Backend Setup
1. **Initialize the Project**
```bash
mkdir task-manager
cd task-manager
npm init -y
```
2. **Install Dependencies**
```bash
npm install express mongoose dotenv cors bcryptjs jsonwebtoken
npm install --save-dev nodemon
```
3. **Project Structure**
```
task-manager/
├── backend/
│ ├── models/
│ │ ├── Task.js
│ │ └── User.js
│ ├── routes/
│ │ ├── auth.js
│ │ └── tasks.js
│ ├── middleware/
│ │ └── auth.js
│ ├── .env
│ ├── server.js
│ └── package.json
├── frontend/
│ ├── public/
│ ├── src/
│ │ ├── components/
│ │ ├── pages/
│ | |
│ │ ├── App.js
│ │ ├── index.js
│ │ └── ... (other necessary files)
│ ├── package.json
│ └── ... (other necessary files)
├── package.json
└── README.md
```
#### Frontend Setup
1. **Initialize React App**
```bash
npx create-react-app frontend
cd frontend
```
2. **Install Dependencies**
```bash
npm install axios redux react-redux react-router-dom @mui/material @emotion/react @emotion/styled
npm install @mui/icons-material
```
3. **Project Structure**
```
frontend/
├── public/
├── src/
│ ├── components/
│ │ ├── Login.js
│ │ ├── Registration.js
│ │ ├── TaskForm.js
│ │ ├── TaskList.js
│ │ ├── ... (other necessary files)
│ ├── pages/
│ │ ├── HomePage.js
│ │ └── ... (other necessary files)
│ ├── App.js
│ ├── index.js
│ └── ... (other necessary files)
├── package.json
└── ... (other necessary files)
```
<a name="user-authentication"></a>
### User Authentication
#### User Registration
1. **Backend: User Model (`models/User.js`)**
```javascript
const mongoose = require('mongoose');
const UserSchema = new mongoose.Schema({
username: { type: String, required: true },
email: { type: String, required: true, unique: true },
password: { type: String, required: true }
});
module.exports = mongoose.model('User', UserSchema);
```
2. **Backend: Auth Routes (`routes/auth.js`)**
```javascript
const express = require('express');
const router = express.Router();
const bcrypt = require('bcryptjs');
const jwt = require('jsonwebtoken');
const User = require('../models/User');
router.post('/register', async (req, res) => {
const { username, email, password } = req.body;
try {
let existingUser = await User.findOne({ email });
if (existingUser) {
return res.status(400).send('Email already registered');
}
const hashedPassword = await bcrypt.hash(password, 10);
const newUser = new User({ username, email, password: hashedPassword });
await newUser.save();
res.status(201).send('User registered');
} catch (error) {
console.error('Registration error:', error);
res.status(500).send('Server Error');
}
});
module.exports = router;
```
3. **Frontend: Registration Component (`components/Registration.js`)**
```javascript
import React, { useState } from 'react';
import axios from 'axios';
const Registration = () => {
const [username, setUsername] = useState('');
const [email, setEmail] = useState('');
const [password, setPassword] = useState('');
const [error, setError] = useState('');
const handleSubmit = async (e) => {
e.preventDefault();
try {
const response = await axios.post('http://localhost:5000/api/auth/register', {
username,
email,
password
});
console.log(response.data);
// Optionally handle success or redirect to login
} catch (error) {
setError('Registration failed. Please try again.');
}
};
return (
<div className="flex justify-center items-center h-screen">
<form onSubmit={handleSubmit} className="bg-white shadow-md rounded px-8 pt-6 pb-8 mb-4">
<h2 className="text-2xl mb-4">Register</h2>
<div className="mb-4">
<input type="text" value={username} onChange={(e) => setUsername(e.target.value)} className="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline" placeholder="Username" required />
</div>
<div className="mb-4">
<input type="email" value={email} onChange={(e) => setEmail(e.target.value)} className="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline" placeholder="Email" required />
</div>
<div className="mb-4">
<input type="password" value={password} onChange={(e) => setPassword(e.target.value)} className="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline" placeholder="Password" required />
</div>
{error && <p className="text-red-500 text-xs italic">{error}</p>}
<button type="submit" className="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline">
Register
</button>
</form>
</div>
);
};
export default Registration;
```
#### User Login
1. **Backend: Auth Routes (`routes/auth.js`)**
```javascript
router.post('/login', async (req, res) => {
const { email, password } = req.body;
try {
const user = await User.findOne({ email });
if (!user) {
return res.status(401).json({ msg: 'Invalid credentials' });
}
const isMatch = await bcrypt.compare(password, user.password);
if (!isMatch) {
return res.status(401).json({ msg: 'Invalid credentials' });
}
const token = jwt.sign({ userId: user._id }, process.env.JWT_SECRET, { expiresIn: '1h' });
res.json({ token });
} catch (err) {
console.error(err.message);
res.status(500).send('Server Error');
}
});
```
2. **Frontend: Login Component (`components/Login.js`)**
```javascript
import React, { useState } from 'react';
import axios from 'axios';
import { Link } from 'react-router-dom';
const Login = ({ onLogin }) => {
const [email, setEmail] = useState('');
const [password, setPassword] = useState('');
const [error, setError] = useState('');
const handleSubmit = async (e) => {
e.preventDefault();
try {
const response = await axios.post('http://localhost:5000/api/auth/login', { email, password });
const token = response.data.token;
onLogin(token); // Notify parent component (App.js) about successful login
} catch (error) {
if (error.response) {
setError('Invalid credentials. Please try again.');
} else {
setError('Something went wrong. Please try again later.');
}
}
};
return (
<div className="flex justify-center items-center h-screen">
<form onSubmit={handleSubmit} className="bg-white shadow-md rounded px-8 pt-6 pb-8 mb-4">
<h2 className="text-2xl mb-4">Login</h2>
<div className="mb-4">
<input type="email" value={email} onChange={(e) => setEmail(e.target.value)} className="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline" placeholder="Email" required />
</div>
<div className="mb-4">
<input type="password" value={password} onChange={(e) => setPassword(e.target.value)} className="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline" placeholder="Password" required />
</div>
{error && <p className="text-red-500 text-xs italic">{error}</p>}
<button type="submit" className="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline">
Login
</button>
<p className="mt-4">
Don't have an account? <Link to="/register" className="text-blue-500 hover:text-blue-700">Register here</Link>
</p>
</form>
</div>
);
};
export default Login;
```
#### JWT Authentication
1. **Backend: Auth Middleware (`middleware/auth.js`)**
```javascript
const jwt = require('jsonwebtoken');
const authMiddleware = (req, res, next) => {
const token = req.header('Authorization')?.replace('Bearer ', '');
if (!token) {
return res.status(401).send('Access denied');
}
try {
const verified = jwt.verify(token, process.env.JWT_SECRET);
req.user = verified;
next();
} catch (error) {
res.status(400).send('Invalid token');
}
};
module.exports = authMiddleware;
```
2. **Backend: Protecting Routes**
```javascript
const express = require('express');
const router = express.Router();
const Task = require('../models/Task');
const authMiddleware = require('../middleware/auth');
// Example of a protected route
router.get('/', authMiddleware, async (req, res) => {
try {
const tasks = await Task.find({ userId: req.user.userId });
res.json(tasks);
} catch (error) {
res.status(500).send('Server Error');
}
});
// ... other routes
```
<a name="task-crud-operations"></a>
### Task CRUD Operations
#### Create Task
1. **Backend: Task Model (`models/Task.js`)**
```javascript
const mongoose = require('mongoose');
const TaskSchema = new mongoose.Schema({
title: { type: String, required: true },
description: { type: String, required: true },
status: { type: String, default: 'pending' },
dueDate: { type: Date },
category: { type: String },
userId: { type: mongoose.Schema.Types.ObjectId, ref: 'User', required: true }
});
module.exports = mongoose.model('Task', TaskSchema);
```
2. **Backend: Task Routes (`routes/tasks.js`)**
```javascript
const express = require('express');
const router = express.Router();
const Task = require('../models/Task');
const authMiddleware = require('../middleware/auth');
router.post('/', authMiddleware, async (req, res) => {
const { title, description, status, dueDate, category } = req.body;
const task = new Task({ title, description, status, dueDate, category, userId: req.user.userId });
try {
await task.save();
res.status(201).json(task);
} catch (error) {
res.status(500).send('Server Error');
}
});
// ... other routes
```
3. **Frontend: TaskForm Component (`components/TaskForm.js`)**
```javascript
import React, { useState } from 'react';
import axios from 'axios';
const TaskForm = ({ token }) => {
const [title, setTitle] = useState('');
const [description, setDescription] = useState('');
const [status, setStatus] = useState('pending');
const [dueDate, setDueDate] = useState('');
const [category, setCategory] = useState('');
const [error, setError] = useState('');
const handleSubmit = async (e) => {
e.preventDefault();
try {
await axios.post('http://localhost:5000/api/tasks', {
title,
description,
status,
dueDate,
category
}, {
headers: {
Authorization: `Bearer ${token}`
}
});
setTitle('');
setDescription('');
setStatus('pending');
setDueDate('');
setCategory('');
setError('');
} catch (error) {
setError('Error adding task. Please try again.');
}
};
return (
<div className="container mx-auto">
<h2 className="text-2xl font-bold mb-4">Add New Task</h2>
<form onSubmit={handleSubmit} className="mb-8">
<div className="flex mb-4">
<input type="text" value={title} onChange={(e) => setTitle(e.target.value)} className="shadow appearance-none border rounded w-1/2 py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline mr-2" placeholder="Title" required />
<input type="text" value={description} onChange={(e) => setDescription(e.target.value)} className="shadow appearance-none border rounded w-1/2 py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline ml-2" placeholder="Description" required />
</div>
<div className="flex mb-4">
<input type="text" value={dueDate} onChange={(e) => setDueDate(e.target.value)} className="shadow appearance-none border rounded w-1/2 py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline mr-2" placeholder="Due Date (Optional)" />
<input type="text" value={category} onChange={(e) => setCategory(e.target.value)} className="shadow appearance-none border rounded w-1/2 py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline ml-2" placeholder="Category (Optional)" />
</div>
<div className="mb-4">
<select value={status} onChange={(e) => setStatus(e.target.value)} className="shadow appearance-none border rounded w-1/4 py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline">
<option value="pending">Pending</option>
<option value="in_progress">In Progress</option>
<option value="completed">Completed</option>
</select>
</div>
<button type="submit" className="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline">
Add Task
</button>
</form>
{error && <p className="text-red-500 text-xs italic">{error}</p>}
</div>
);
};
export default TaskForm;
```
#### Read Tasks
1. **Backend: Task Routes (`routes/tasks.js`)**
```javascript
router.get('/', authMiddleware, async (req, res) => {
try {
const tasks = await Task.find({ userId: req.user.userId });
res.json(tasks);
} catch (error) {
res.status(500).send('Server Error');
}
});
```
2. **Frontend: TaskList Component (`components/TaskList.js`)**
```javascript
import React, { useState, useEffect } from 'react';
import axios from 'axios';
const TaskList = ({ token }) => {
const [tasks, setTasks] = useState([]);
const [error, setError] = useState('');
useEffect(() => {
const fetchTasks = async () => {
try {
const response = await axios.get('http://localhost:5000/api/tasks', {
headers: {
Authorization: `Bearer ${token}`
}
});
setTasks(response.data);
} catch (error) {
setError('Error fetching tasks. Please try again.');
}
};
fetchTasks();
}, [token]);
const handleDelete = async (id) => {
try {
await axios.delete(`http://localhost:5000/api/tasks/${id}`, {
headers: {
Authorization: `Bearer ${token}`
}
});
setTasks(tasks.filter(task => task._id !== id));
} catch (error) {
setError('Error deleting task. Please try again.');
}
};
return (
<div className="container mx-auto">
<h2 className="text-2xl font-bold mb-4">Task List</h2>
{error && <p className="text-red-500 text-xs italic">{error}</p>}
{tasks.map(task => (
<div key={task._id} className="mb-4 p-4 border rounded shadow">
<h3 className="font-bold">{task.title}</h3>
<p>{task.description}</p>
<p><strong>Status:</strong> {task.status}</p>
{task.dueDate && <p><strong>Due Date:</strong> {task.dueDate}</p>}
{task.category && <p><strong>Category:</strong> {task.category}</p>}
<button onClick={() => handleDelete(task._id)} className="mt-2 bg-red-500 hover:bg-red-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline">
Delete
</button>
</div>
))}
</div>
);
};
export default TaskList;
```
#### Update Task
1. **Backend: Task Routes (`routes/tasks.js`)**
```javascript
router.put('/:id', authMiddleware, async (req, res) => {
const { title, description, status, dueDate, category } = req.body;
try {
const updatedTask = await Task.findByIdAndUpdate(req.params.id, { title, description, status, dueDate, category }, { new: true });
res.json(updatedTask);
} catch (error) {
res.status(500).send('Server Error');
}
});
```
2. **Frontend: TaskManager Component with Edit Capability (`components/TaskManager.js`)**
```javascript
import React, { useState, useEffect } from 'react';
import axios from 'axios';
const TaskManager = ({ token }) => {
const [tasks, setTasks] = useState([]);
const [title, setTitle] = useState('');
const [description, setDescription] = useState('');
const [status, setStatus] = useState('pending');
const [dueDate, setDueDate] = useState('');
const [category, setCategory] = useState('');
const [editingTask, setEditingTask] = useState(null);
const [error, setError] = useState('');
useEffect(() => {
const fetchTasks = async () => {
try {
const response = await axios.get('http://localhost:5000/api/tasks', {
headers: {
Authorization: `Bearer ${token}`
}
});
setTasks(response.data);
} catch (error) {
setError('Error fetching tasks. Please try again.');
}
};
fetchTasks();
}, [token]);
const handleSubmit = async (e) => {
e.preventDefault();
try {
if (editingTask) {
const response = await axios.put(`http://localhost:5000/api/tasks/${editingTask._id}`, {
title,
description,
status,
dueDate,
category
}, {
headers: {
Authorization: `Bearer ${token}`
}
});
setTasks(tasks.map(task => (task._id === editingTask._id ? response.data : task)));
} else {
const response = await axios.post('http://localhost:5000/api/tasks', {
title,
description,
status,
dueDate,
category
}, {
headers: {
Authorization: `Bearer ${token}`
}
});
setTasks([...tasks, response.data]);
}
resetForm();
} catch (error) {
setError('Task submission failed. Please try again.');
}
};
const resetForm = () => {
setTitle('');
setDescription('');
setStatus('pending');
setDueDate('');
setCategory('');
setEditingTask(null);
};
const handleEdit = (task) => {
setTitle(task.title);
setDescription(task.description);
setStatus(task.status);
setDueDate(task.dueDate ? task.dueDate.substring(0, 10) : '');
setCategory(task.category);
setEditingTask(task);
};
const handleDelete = async (id) => {
try {
await axios.delete(`http://localhost:5000/api/tasks/${id}`, {
headers: {
Authorization: `Bearer ${token}`
}
});
setTasks(tasks.filter(task => task._id !== id));
} catch (error) {
setError('Error deleting task. Please try again.');
}
};
return (
<div className="container mx-auto">
<h2 className="text-2xl font-bold mb-4">Task Manager</h2>
<form onSubmit={handleSubmit} className="mb-8">
<div className="flex mb-4">
<input type="text" value={title} onChange={(e) => setTitle(e.target.value)} className="shadow appearance-none border rounded w-1/2 py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline mr-2" placeholder="Title" required />
<input type="text" value={description} onChange={(e) => setDescription(e.target.value)} className="shadow appearance-none border rounded w-1/2 py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline ml-2" placeholder="Description" required />
</div>
<div className="flex mb-4">
<input type="text" value={dueDate} onChange={(e) => setDueDate(e.target.value)} className="shadow appearance-none border rounded w-1/2 py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline mr-2" placeholder="Due Date (Optional)" />
<input type="text" value={category} onChange={(e) => setCategory(e.target.value)} className="shadow appearance-none border rounded w-1/2 py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline ml-2" placeholder="Category (Optional)" />
</div>
<div className="mb-4">
<select value={status} onChange={(e) => setStatus(e.target.value)} className="shadow appearance-none border rounded w-1/4 py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline">
<option value="pending">Pending</option>
<option value="in_progress">In Progress</option>
<option value="completed">Completed</option>
</select>
</div>
<button type="submit" className="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline">
{editingTask ? 'Update Task' : 'Add Task'}
</button>
</form>
{error && <p className="text-red-500 text-xs italic">{error}</p>}
<div>
{tasks.map(task => (
<div key={task._id} className="mb-4 p-4 border rounded shadow">
<h3 className="font-bold">{task.title}</h3>
<p>{task.description}</p>
<p><strong>Status:</strong> {task.status}</p>
{task.dueDate && <p><strong>Due Date:</strong> {task.dueDate}</p>}
{task.category && <p><strong>Category:</strong> {task.category}</p>}
<button onClick={() => handleEdit(task)} className="mt-2 bg-yellow-500 hover:bg-yellow-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline mr-2">
Edit
</button>
<button onClick={() => handleDelete(task._id)} className="mt-2 bg-red-500 hover:bg-red-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline">
Delete
</button>
</div>
))}
</div>
</div>
);
};
export default TaskManager;
```
#### Delete Task
1. **Backend: Task Routes (`routes/tasks.js`)**
```javascript
router.delete('/:id', authMiddleware, async (req, res) => {
try {
await Task.findByIdAndDelete(req.params.id);
res.status(204).send();
} catch (error) {
res.status(500).send('Server Error');
}
});
```
<a name="task-categories"></a>
### Task Categories
#### Add Task to Categories
This feature is already covered in the Task CRUD operations where we have the `category` field in the task model and forms.
#### Filter Tasks by Category
1. **Backend: Task Routes (`routes/tasks.js`)**
```javascript
router.get('/category/:category', authMiddleware, async (req, res) => {
try {
const tasks = await Task.find({ userId: req.user.userId, category: req.params.category });
res.json(tasks);
} catch (error) {
res.status(500).send('Server Error');
}
});
```
2. **Frontend: TaskList Component (`components/TaskList.js`)**
```javascript
import React, { useState, useEffect } from 'react';
import axios from 'axios';
const TaskList = ({ token }) => {
const [tasks, setTasks] = useState([]);
const [category, setCategory] = useState('');
const [error, setError] = useState('');
useEffect(() => {
const fetchTasks = async () => {
try {
const response = await axios.get('http://localhost:5000/api/tasks', {
headers: {
Authorization: `Bearer ${token}`
}
});
setTasks(response.data);
} catch (error) {
setError('Error fetching tasks. Please try again.');
}
};
fetchTasks();
}, [token]);
const handleCategoryChange = async (e) => {
setCategory(e.target.value);
try {
const response = await axios.get(`http://localhost:5000/api/tasks/category/${e.target.value}`, {
headers: {
Authorization: `Bearer ${token}`
}
});
setTasks(response.data);
} catch (error) {
setError('Error fetching tasks by category. Please try again.');
}
};
return (
<div className="container mx-auto">
<h2 className="text-2xl font-bold mb-4">Task List</h2>
<select value={category} onChange={handleCategoryChange} className="mb-4 shadow appearance-none border rounded py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline">
<option value="">All Categories</option>
<option value="Work">Work</option>
<option value="Personal">Personal</option>
{/* Add more categories as needed */}
</select>
{error && <p className="text-red-500 text-xs italic">{error}</p>}
{tasks.map(task => (
<div key={task._id} className="mb-4 p-4 border rounded shadow">
<h3 className="font-bold">{task.title}</h3>
<p>{task.description}</p>
<p><strong>Status:</strong> {task.status}</p>
{task.dueDate && <p><strong>Due Date:</strong> {task.dueDate}</p>}
{task.category && <p><strong>Category:</strong> {task.category}</p>}
<button onClick={() => handleDelete(task._id)} className="mt-2 bg-red-500 hover:bg-red-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline">
Delete
</button>
</div>
))}
</div>
);
};
export default TaskList;
```
<a name="uiux-design"></a>
### UI/UX Design
#### Responsive Design
1. **Using Tailwind CSS**
- Install Tailwind CSS:
```bash
npm install tailwindcss
npx tailwindcss init
```
- Configure `tailwind.config.js`:
```javascript
module.exports = {
content: [
"./src/**/*.{js,jsx,ts,tsx}",
],
theme: {
extend: {},
},
plugins: [],
}
```
- Import Tailwind CSS in `index.css`:
```css
@tailwind base;
@tailwind components;
@tailwind utilities;
```
#### User-Friendly Interface
Utilize Material-UI components for a more polished look and feel. For example, use `TextField`, `Button`, and other components from Material-UI to create forms and buttons.
#### Drag-and-Drop Functionality
1. **Install React DnD**
```bash
npm install react-dnd react-dnd-html5-backend
```
2. **Implement Drag-and-Drop in TaskList Component**
```javascript
import React, { useState, useEffect } from 'react';
import axios from 'axios';
import { useDrag, useDrop } from 'react-dnd';
import { HTML5Backend } from 'react-dnd-html5-backend';
import { DndProvider } from 'react-dnd';
const ItemType = {
TASK: 'task'
};
const Task = ({ task, index, moveTask }) => {
const [, ref] = useDrag({
type: ItemType.TASK,
item: { index },
});
const [, drop] = useDrop({
accept: ItemType.TASK,
hover: (item) => {
if (item.index !== index) {
moveTask(item.index, index);
item.index = index;
}
},
});
return (
<div ref={(node) => ref(drop(node))} className="mb-4 p-4 border rounded shadow">
<h3 className="font-bold">{task.title}</h3>
<p>{task.description}</p>
<p><strong>Status:</strong> {task.status}</p>
{task.dueDate && <p><strong>Due Date:</strong> {task.dueDate}</p>}
{task.category && <p><strong>Category:</strong> {task.category}</p>}
</div>
);
};
const TaskList = ({ token }) => {
const [tasks, setTasks] = useState([]);
const [error, setError] = useState('');
useEffect(() => {
const fetchTasks = async () => {
try {
const response = await axios.get('http://localhost:5000/api/tasks', {
headers: {
Authorization: `Bearer ${token}`
}
});
setTasks(response.data);
} catch (error) {
setError('Error fetching tasks. Please try again.');
}
};
fetchTasks();
}, [token]);
const moveTask = (fromIndex, toIndex) => {
const updatedTasks = [...tasks];
const [movedTask] = updatedTasks.splice(fromIndex, 1);
updatedTasks.splice(toIndex, 0, movedTask);
setTasks(updatedTasks);
};
return (
<DndProvider backend={HTML5Backend}>
<div className="container mx-auto">
<h2 className="text-2xl font-bold mb-4">Task List</h2>
{error && <p className="text-red-500 text-xs italic">{error}</p>}
{tasks.map((task, index) => (
<Task key={task._id} index={index} task={task} moveTask={moveTask} />
))}
</div>
</DndProvider>
);
};
export default TaskList;
```
<a name="notifications"></a>
### Notifications
#### Email Notifications
1. **Install Nodemailer**
```bash
npm install nodemailer
```
2. **Configure Nodemailer in Backend**
```javascript
const nodemailer = require('nodemailer');
const transporter = nodemailer.createTransport({
service: 'gmail',
auth: {
user: process.env.EMAIL,
pass: process.env.EMAIL_PASSWORD
}
});
const sendNotification = (email, subject, text) => {
const mailOptions = {
from: process.env.EMAIL,
to: email,
subject: subject,
text: text
};
transporter.sendMail(mailOptions, (error, info) => {
if (error) {
console.error('Error sending email:', error);
} else {
console.log('Email sent:', info.response);
}
});
};
module.exports = sendNotification;
```
3. **Send Notification on Task Due Date**
```javascript
const sendNotification = require('../utils/sendNotification');
router.post('/', authMiddleware, async (req, res) => {
const { title, description, status, dueDate, category } = req.body;
const task = new Task({ title, description, status, dueDate, category, userId: req.user.userId });
try {
await task.save();
sendNotification(req.user.email, 'New Task Created', `You have a new task: ${title}`);
res.status(201).json(task);
} catch (error) {
res.status(500).send('Server Error');
}
});
```
#### In-App Notifications
1. **Install Socket.io**
```bash
npm install socket.io
```
2. **Configure Socket.io in Backend**
```javascript
const http = require('http');
const socketio = require('socket.io');
const server = http.createServer(app);
const io = socketio(server);
io.on('connection', (socket) => {
console.log('New WebSocket connection');
socket.on('disconnect', () => {
console.log('WebSocket disconnected');
});
});
// Change app.listen to server.listen
server.listen(PORT, () => console.log(`Server running on http://localhost:${PORT}`));
```
3. **Frontend: Configure Socket.io Client**
```javascript
import React, { useEffect } from 'react';
import io from 'socket.io-client';
const socket = io('http://localhost:5000');
const Notifications = () => {
useEffect(() => {
socket.on('notification', (message) => {
alert(message);
});
}, []);
return <div>Notifications Component</div>;
};
export default Notifications;
```
<a name="collaboration"></a>
### Collaboration
#### Share Tasks
1. **Backend: Add Shared Users to Task Model**
```javascript
const TaskSchema = new mongoose.Schema({
// ... other fields
sharedWith: [{ type: mongoose.Schema.Types.ObjectId, ref: 'User' }]
});
```
2. **Backend: Share Task Route**
```javascript
router.post('/:id/share', authMiddleware, async (req, res) => {
const { userId } = req.body;
try {
const task = await Task.findById(req.params.id);
if (!task) {
return res.status(404).send('Task not found');
}
task.sharedWith.push(userId);
await task.save();
res.status(200).json(task);
} catch (error) {
res.status(500).send('Server Error');
}
});
```
3. **Frontend: Share Task Form**
```javascript
import React, { useState } from 'react';
import axios from 'axios';
const ShareTaskForm = ({ taskId, token }) => {
const [email, setEmail] = useState('');
const [error, setError] = useState('');
const handleSubmit = async (e) => {
e.preventDefault();
try {
const response = await axios.post(`http://localhost:5000/api/tasks/${taskId}/share`, { email }, {
headers: {
Authorization: `Bearer ${token}`
}
});
setEmail('');
setError('');
} catch (error) {
setError('Error sharing task. Please try again.');
}
};
return (
<form onSubmit={handleSubmit}>
<input type="email" value={email} onChange={(e) => setEmail(e.target.value)} placeholder="User Email" required />
<button type="submit">Share Task</button>
{error && <p>{error}</p>}
</form>
);
};
export default ShareTaskForm;
```
#### Assign Tasks
1. **Backend: Add Assigned User to Task Model**
```javascript
const TaskSchema = new mongoose.Schema({
// ... other fields
assignedTo: { type: mongoose.Schema.Types.ObjectId, ref: 'User' }
});
```
2. **Backend: Assign Task Route**
```javascript
router.post('/:id/assign', authMiddleware, async (req, res) => {
const { userId } = req.body;
try {
const task = await Task.findById(req.params.id);
if (!task) {
return res.status(404).send('Task not found');
}
task.assignedTo = userId;
await task.save();
res.status(200).json(task);
} catch (error) {
res.status(500).send('Server Error');
}
});
```
3. **Frontend: Assign Task Form**
```javascript
import React, { useState } from 'react';
import axios from 'axios';
const AssignTaskForm = ({ taskId, token }) => {
const [email, setEmail] = useState('');
const [error, setError] = useState('');
const handleSubmit = async (e) => {
e.preventDefault();
try {
const response = await axios.post(`http://localhost:5000/api/tasks/${taskId}/assign`, { email }, {
headers: {
Authorization: `Bearer ${token}`
}
});
setEmail('');
setError('');
} catch (error) {
setError('Error assigning task. Please try again.');
}
};
return (
<form onSubmit={handleSubmit}>
<input type="email" value={email} onChange={(e) => setEmail(e.target.value)} placeholder="User Email" required />
<button type="submit">Assign Task</button>
{error && <p>{error}</p>}
</form>
);
};
export default AssignTaskForm;
```
<a name="complete-code-integration"></a>
### Complete Code Integration
Combine all components and features into a cohesive project.
#### Backend (`server.js`)
```javascript
const express = require('express');
const mongoose = require('mongoose');
const cors = require('cors');
require('dotenv').config();
const http = require('http');
const socketio = require('socket.io');
const authRoutes = require('./routes/auth');
const taskRoutes = require('./routes/tasks');
const app = express();
const server = http.createServer(app);
const io = socketio(server);
app.use(cors());
app.use(express.json());
mongoose.connect(process.env.MONGODB_URI, {
useNewUrlParser: true,
useUnifiedTopology: true,
}).then(() => console.log('MongoDB connected'))
.catch(err => console.error('MongoDB connection error:', err));
app.use('/api/auth', authRoutes);
app.use('/api/tasks', taskRoutes);
io.on('connection', (socket) => {
console.log('New WebSocket connection');
socket.on('disconnect', () => {
console.log('WebSocket disconnected');
});
});
const PORT = process.env.PORT || 5000;
server.listen(PORT, () => console.log(`Server running on http://localhost:${PORT}`));
```
#### Frontend (`App.js`)
```javascript
import React, { useState } from 'react';
import { BrowserRouter as Router, Routes, Route, Navigate } from 'react-router-dom';
import Login from './components/Login';
import Registration from './components/Registration';
import TaskManager from './components/TaskManager';
import Notifications from './components/Notifications';
const App = () => {
const [token, setToken] = useState('');
const handleLogin = (token) => {
setToken(token);
};
const handleLogout = () => {
setToken('');
};
return (
<Router>
<div className="App">
<Routes>
<Route path="/login" element={<Login onLogin={handleLogin} />} />
<Route path="/register" element={<Registration />} />
<Route
path="/tasks"
element={
token ? (
<>
<button onClick={handleLogout} className="bg-red-500 hover:bg-red-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline">
Logout
</button>
<TaskManager token={token} />
<Notifications />
</>
) : (
<Navigate to="/login" />
)
}
/>
<Route path="/" element={<Navigate to="/login" />} />
</Routes>
</div>
</Router>
);
};
export default App;
```
<a name="final-thoughts"></a>
### Final Thoughts
This guide provides a comprehensive overview of developing a task management application using the MERN stack. By following these steps, you can create a fully functional application with user authentication, task management, responsive design, notifications, and collaboration features.
Keep exploring and enhancing your application by adding more features and improving the existing ones. Happy coding!
## 💰 You can help me by Donating
[](https://buymeacoffee.com/dk119819)
| raajaryan |
1,893,846 | Working with Parquet files in Java using Carpet | After some time working with Parquet files in Java using the Parquet Avro library, and studying how... | 0 | 2024-06-19T16:55:22 | https://www.jeronimo.dev/working-with-parquet-files-in-java-using-carpet/ | parquet, java, bigdata, dataengineering | After some time working with Parquet files in Java using the Parquet Avro library, and studying how it worked, I concluded that despite **being very useful** in multiple use cases and having great potential, **the documentation and ecosystem needed for adoption in the Java world was very poor**.
Many people are using suboptimal solutions (CSV or JSON files), applying more complex solutions (Spark), or using languages they are not familiar with (Python) because they don't know how to work with Parquet files easily. That's why I decided to **write this [series of articles](/jerolba/working-with-parquet-files-in-java-3f1j)**.
Once you understand it and have the examples, everything is easier. But, **can it be even easier?** Can we avoid the hassle of using *strange* libraries that serialize other formats? **Yes, it should be even easier.**
That's why I decided to **implement an Open Source library** that makes working with Parquet from Java extremely simple, something that covers it: **Carpet**.
<!--more-->
Carpet is a Java library that serializes and deserializes Parquet files to Java 17 Records, abstracting you (if you want) from the particularities of Parquet and Hadoop, and minimizing the number of necessary dependencies, because it works directly with Parquet code. It is available on [Maven Central](https://central.sonatype.com/artifact/com.jerolba/carpet-record) and you can find its source code on [GitHub](https://github.com/jerolba/parquet-carpet).
## Hello world
**Carpet works by reflection**: it inspects your class model and there is no need to define an IDL, implement interfaces, or use annotations. **Carpet is based on Java records**, the primitive created by the JDK for [Data Oriented Programming](https://www.infoq.com/articles/data-oriented-programming-java/).
Continuing with the same examples from previous articles, we will have a collection of Organization objects, which have a list of Attributes:
```java
record Org(String name, String category, String country, Type type, List<Attr> attributes) { }
record Attr(String id, byte quantity, byte amount, boolean active, double percent, short size) { }
enum Type { FOO, BAR, BAZ }
```
With Carpet, it is not necessary to create special classes or perform transformations. **Carpet works directly with your model**, as long as it fits the Parquet schema you need.
### Serialization
With Carpet, you don't need to use Parquet writers or Hadoop classes:
```java
try (OutputStream outputStream = new FileOutputStream(filePath)) {
try (CarpetWriter writer = new CarpetWriter<>(outputStream, Org.class)) {
writer.write(organizations);
}
}
```
The code can be found on [GitHub](https://github.com/jerolba/parquet-for-java-posts/blob/master/src/main/java/com/jerolba/parquet/carpet/ToParquetUsingCarpetWriter.java#L14).
If your records match the required Parquet schema, class conversion is not necessary. If you don't need special Parquet configuration, you don't have to create builders, and you can use a Java `OutputStream` directly.
**By reflection, it creates the Parquet schema**, using the names and types of the fields in your records as column names and types.
Carpet supports complex data structures, as long as all objects are records, collections (List, Set, etc.), and maps.
### Deserialization
Deserialization is equally simple, or even simpler.
```java
List<Org> organizations = new CarpetReader<>(new File(filePath), Org.class).toList();
```
You can also iterate through the file with a stream:
```java
List<Org> organizations = new CarpetReader<>(new File(filePath), Org.class).stream()
.filter(this::somePredicate)
.toList();
```
The code can be found on [GitHub](https://github.com/jerolba/parquet-for-java-posts/blob/master/src/main/java/com/jerolba/parquet/carpet/FromParquetUsingCarpetReader.java#L13).
Since Carpet uses reflection, it conventionally expects the types and names of the fields to match those of the columns in the Parquet file.
None of the Parquet or Hadoop classes are imported into your code.
### Deserialization using a projection
Carpet reads only the columns that are defined in the records and ignores any other columns that exist in the file. **Defining a projection with a subset of attributes is as simple as defining a record in Java**:
```java
record OrgProjection(String name, String category, String country, Type type) { }
var organizations = new CarpetReader<>(new File(filePath), OrgProjection.class).toList();
```
In this case, reading time is reduced to hundreds of milliseconds.
The code can be found on [GitHub](https://github.com/jerolba/parquet-for-java-posts/blob/master/src/main/java/com/jerolba/parquet/carpet/FromParquetUsingCarpetReaderProjection.java#L14).
---
## The Parquet way
If for any reason you need to customize some parameter of file generation or use it with Hadoop, Carpet provides an implementation of the `ParquetWriter` and `ParquetReader` builders. This way, all Parquet configurations are exposed.
### Serialization
We will need to instantiate a Parquet writer:
```java
OutputFile outputFile = new FileSystemOutputFile(new File(filePath));
try (ParquetWriter.<Org> writer = CarpetParquetWriter.<Org>builder(outputFile, Org.class)
.withCompressionCodec(CompressionCodecName.GZIP)
.withWriteMode(Mode.OVERWRITE)
.build()) {
for (Org org : organizations) {
writer.write(org);
}
}
```
The code can be found on [GitHub](https://github.com/jerolba/parquet-for-java-posts/blob/master/src/main/java/com/jerolba/parquet/carpet/ToParquetUsingCarpetParquetWriter.java#L19).
Carpet implements a `ParquetWriter<T>` builder with all the logic to **convert Java records to Parquet API calls**.
To avoid using Hadoop classes (and importing all their dependencies), **Carpet implements the `InputFile` and `OutputFile` interfaces using regular files**.
Therefore:
* `OutputFile` and `ParquetWriter` are classes defined by the Parquet API
* `CarpetParquetWriter` and `FileSystemOutputFile` are classes implemented by Carpet
* `Org` and `Attr` are Java records from your domain, unrelated to Parquet or Carpet
Carpet implicitly generates the Parquet schema from the fields of your records.
### Deserialization
We will need to instantiate a Parquet reader using the `CarpetParquetReader` builder:
```java
InputFile inputFile = new FileSystemInputFile(new File(filePath));
try (ParquetReader<Org> reader = CarpetParquetReader.builder(inputFile, Org.class).build()) {
List<Org> organizations = new ArrayList<>();
Org next = null;
while ((next = reader.read()) != null) {
organizations.add(next);
}
return organizations;
}
```
You can find the code on [GitHub](https://github.com/jerolba/parquet-for-java-posts/blob/master/src/main/java/com/jerolba/parquet/carpet/FromParquetUsingParquetCarpetReader.java#L18).
Parquet defines a class called `ParquetReader<T>`, and Carpet implements it with `CarpetParquetReader`, handling the logic to **convert internal data structures of Parquet** to your Java records.
In this case:
* `InputFile` and `ParquetReader` are classes defined by the Parquet API
* `CarpetParquetReader` and `FileSystemOutputFile` are classes implemented by Carpet
* `Org` (and `Attr`) are Java records from your domain, unrelated to Parquet
The instantiation of the `ParquetReader` class is also done with a Builder to maintain the pattern followed by Parquet.
Carpet validates that the schema of the Parquet file is compatible with the Java records. If not, it throws an exception.
---
## Performance
With identical schemas and data, the file sizes compared to `parquet-avro` and `parquet-protobuf` are the same. However, what is the overhead cost of using reflection?
| Library | Serialization | Deserialization |
|:---|---:|---:|
| Parquet Avro | 15,381 ms | 7,665 ms |
| Parquet Protocol Buffers | 16,174 ms | 11,025 ms |
| Carpet | 12,769 ms | 8,881 ms |
Writing, Carpet is 20% faster than using Avro and Protocol Buffers. The overhead of reflection is less than the work required to create Avro or Protocol Buffers objects.
In terms of reading, Carpet is slightly slower than the fastest version of Parquet Avro. The use of reflection does not significantly penalize performance, and in return, we avoid using custom data types of the library.
## Conclusion
Parquet is a very powerful format, yet underutilized in the Java ecosystem. This is partly due to lack of awareness and the difficulty in working with it, and partly because being a binary format, it is not very comfortable to work with it.
Even if you're not into Big Data, Parquet can still be useful in scenarios involving large datasets. Often, due to unfamiliarity, complex or inefficient solutions and architectures are adopted.
The format, with its schema, **ensures that the defined types are satisfied or the data cannot be null**. How many times have you struggled parsing a CSV file?
Carpet provides a very simple API, making it extremely easy to write and process Parquet files in 99% of use cases. For me, **working with Parquet files is now more convenient than CSVs**.
Carpet is an open-source library under the Apache 2.0 license. You can find its source code on [GitHub](https://github.com/jerolba/parquet-carpet) and it's available on [Maven Central](https://central.sonatype.com/artifact/com.jerolba/carpet-record).
The [README.md](https://github.com/jerolba/parquet-carpet?tab=readme-ov-file#table-of-contents) of the project provides a detailed explanation of its various functionalities, customization options, and how to use its API. **I encourage you to use Carpet and share your feedback or tell me about your use cases working with Parquet.** | jerolba |
1,893,843 | Setting Expectations for your team | Let's be real – setting expectations for your team can be a bit of a minefield. You want to give them... | 27,779 | 2024-06-19T16:51:23 | https://dev.to/johnscode/setting-expectations-for-your-team-m56 | leadership, management, softwareengineering | Let's be real – setting expectations for your team can be a bit of a minefield. You want to give them the autonomy to innovate and own their work, but you also need to make sure everyone's on the same page. So, how do you strike that balance? I've got five tips that have worked wonders for me, and I'm excited to share them with you.
1. Collaborate on Expectations
First things first, ditch the top-down approach. Nobody likes being told what to do, and it's a surefire way to kill motivation. Instead, get your team involved in the process. Sit down with them, hash out some goals together, and make sure everyone's bought in. Trust me, when your team feels like they have a say, they'll be much more invested in the outcome.
2. Set clear targets
Let's talk about those goals. Whether you're using SMART, FAST, OKRs, or some other acronym, the key is to make them specific and measurable. Give your team a clear target to aim for and a timeline to get there. This way, everyone knows what success looks like, and you can celebrate those wins together.
3. Agree on the details
Here's where most managers drop the ball – they forget to agree on "how" to reach the goals. Sure, you've got your goals, but what about the nitty-gritty details? What processes are in place? What resources are available? What pitfalls should they watch out for? Don't assume your team can read your mind. Take the time to spell it out, and you'll save yourself a ton of headaches down the road.
4. Dangle those carrots
Offer incentives. Most people want to go the extra mile. So, why not use that to your advantage? Figure out what really matters – whether it's speed, volume, or cost – and align your rewards with those key levers. A little friendly competition never hurt anyone, right?
5. Pay Attention to the Data
Company goals can change with market conditions and many other factors. Your expectations need to keep up. Agree on some key metrics that will let you know when it's time to step in and provide support or course-correct. By empowering your team to make changes based on the changing conditions, you'll free up your own time to focus on the big picture.
So, how do you put all of this into use? Start with a quick chat with each team member to go over these key points. Have them write a list that captures what you've agreed on.
Great, expectations are agreed on. Schedule regular check-ins to see how everyone's tracking against those goals. Make these monthly or whatever period works for the team. Semi-annual is too long to wait for feedback or an adjustment. Remember, you want to manage for their success.
Here's a suggestion I read online: before each check-in, have each team member grade themselves. Then, compare notes with your own assessment and hash out any differences. This way, you'll catch any misalignments early and avoid any awkward surprises come review time.
Setting clear expectations doesn't have to be a chore. By taking a collaborative approach and focusing on the key levers that drive success, you can create a culture of ownership and innovation that will take your team to the next level. Give it a shot; I think you'll be pleasantly surprised by the results! | johnscode |
1,893,842 | Study for FE | Fast-track your FE Electrical and Computer exam preparation with our comprehensive program. Whether... | 0 | 2024-06-19T16:51:14 | https://dev.to/malik_hamid_311d4b4c65819/study-for-fe-156o | exam, preparation, engineering | [](https://www.studyforfe.com/)
Fast-track your FE Electrical and Computer exam preparation with our comprehensive program. Whether you are a recent graduate or a working professional with years of experience, this FE exam preparation course will take you step-by-step through all sections of the latest NCEES® FE Electrical and Computer Exam Specification. | malik_hamid_311d4b4c65819 |
1,893,841 | "🚀 From Algorithms to Applications: My Journey as a Machine Learning Developer 🤖" | Introduction Hello DEV Community! 👋 I'm Aviral Garg, a machine learning developer with a passion for... | 0 | 2024-06-19T16:49:32 | https://dev.to/aviralgarg05/-from-algorithms-to-applications-my-journey-as-a-machine-learning-developer--449h | beginners, programming, tutorial, python | Introduction
Hello DEV Community! 👋 I'm Aviral Garg, a machine learning developer with a passion for turning data into actionable insights. I’ve been working in this field for 1 year, and I’m excited to share my journey, the challenges I’ve faced, and tips for anyone looking to dive into machine learning.
My Path to Machine Learning
Initial Interest 🎓
My journey began when I encountered a problem that seemed insurmountable with traditional programming methods. The potential of machine learning to find patterns and make predictions fascinated me. 🌟
Education and Learning Resources 📚
I started with books like "Hands-On Machine Learning with Scikit-Learn, Keras, and TensorFlow" by Aurélien Géron were invaluable. I also spent countless hours on platforms like Kaggle, where I could apply what I learned. 💡
First Projects 💻
One of my first projects was predicting stock prices using regression models. It was both challenging and rewarding. I primarily used Python and libraries such as scikit-learn and pandas. 🏡📈
Key Challenges and How I Overcame Them
Understanding the Basics 🧠
Grasping fundamental concepts like overfitting, bias-variance tradeoff, and cross-validation was crucial. Online courses and hands-on projects helped reinforce these concepts. 🔍
Choosing the Right Tools 🛠️
I found TensorFlow and PyTorch particularly powerful for building neural networks. Scikit-learn is my go-to for simpler models and data preprocessing. 💪
Staying Updated 📈
Following blogs like Towards Data Science, reading research papers, and attending conferences like NeurIPS help me stay abreast of the latest developments. 📰📚
Tips for Beginners
Start with the Basics 📘
Understanding the core concepts is essential. Don’t rush into deep learning without a solid foundation in statistics and linear algebra. 📊
Hands-On Practice 🏋️♂️
Apply your knowledge to real-world datasets. Kaggle is an excellent platform for this. 🏆
Build a Portfolio 📁
Showcase your projects on GitHub. It’s a great way to demonstrate your skills to potential employers. 🌟
Join the Community 🤝
Engage with communities like DEV. Learning from others and sharing your experiences can be incredibly beneficial. 🌐
Conclusion
Machine learning is a field that combines creativity and technical skill. It’s challenging but immensely rewarding. Feel free to connect with me here on DEV for further discussions or collaborations. 🚀 | aviralgarg05 |
1,893,840 | Building a To-Do App with RTK Query | In this guide, we'll walk you through creating a simple to-do application using RTK Query, a powerful... | 0 | 2024-06-19T16:46:00 | https://dev.to/rudragupta_dev/building-a-to-do-app-with-rtk-query-2c0n | In this guide, we'll walk you through creating a simple to-do application using RTK Query, a powerful data fetching and caching tool from Redux Toolkit. We'll use an open-source API to manage our to-dos. By the end of this guide, you'll have a fully functional To-Do app and a solid understanding of how to integrate RTK Query into your projects.
### Before we start, make sure you have the following installed:
- Node.js
- npm or yarn
- A code editor (e.g., VSCode)
### Step 1: Setting Up the Project
1. Initialize a new React project:
```
yarn create-react-app rtk-query-todo
cd rtk-query-todo
```
2. Install necessary dependencies:
```
yarn add @reduxjs/toolkit react-redux
```
### Step 2: Setting Up RTK Query
1. Create an API slice:
First, let's create an API slice to manage our To-Do operations. We'll use the [JSONPlaceholder] (https://jsonplaceholder.typicode.com/) API for demonstration purposes.
Create a file named apiSlice.js in the src directory:
```
// src/apiSlice.js
import { createApi, fetchBaseQuery } from '@reduxjs/toolkit/query/react';
export const apiSlice = createApi({
reducerPath: 'api',
baseQuery: fetchBaseQuery({ baseUrl: 'https://jsonplaceholder.typicode.com/' }),
endpoints: (builder) => ({
getTodos: builder.query({
query: () => 'todos',
}),
addTodo: builder.mutation({
query: (newTodo) => ({
url: 'todos',
method: 'POST',
body: newTodo,
}),
}),
deleteTodo: builder.mutation({
query: (id) => ({
url: `todos/${id}`,
method: 'DELETE',
}),
}),
}),
});
export const { useGetTodosQuery, useAddTodoMutation, useDeleteTodoMutation } = apiSlice;
```
2. Configure the store:
Next, let's configure our Redux store to include the API slice.
```
// src/app/store.js
import { configureStore } from '@reduxjs/toolkit';
import { apiSlice } from '../apiSlice';
export const store = configureStore({
reducer: {
[apiSlice.reducerPath]: apiSlice.reducer,
},
middleware: (getDefaultMiddleware) =>
getDefaultMiddleware().concat(apiSlice.middleware),
});
```
3. Provide the store to your app:
Wrap your application with the Redux provider in index.js.
```
// src/index.js
import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import { store } from './app/store';
import App from './App';
import './index.css';
ReactDOM.render(
<React.StrictMode>
<Provider store={store}>
<App />
</Provider>
</React.StrictMode>,
document.getElementById('root')
);
```
### Step 3: Creating the To-Do Components
1. Create a To-Do List component:
```
// src/components/TodoList.js
import React from 'react';
import { useGetTodosQuery, useDeleteTodoMutation } from '../apiSlice';
const TodoList = () => {
const { data: todos, error, isLoading } = useGetTodosQuery();
const [deleteTodo] = useDeleteTodoMutation();
if (isLoading) return <p>Loading...</p>;
if (error) return <p>Error loading todos</p>;
return (
<ul>
{todos.map((todo) => (
<li key={todo.id}>
{todo.title}
<button onClick={() => deleteTodo(todo.id)}>Delete</button>
</li>
))}
</ul>
);
};
export default TodoList;
```
2. Create an Add To-Do component:
```
// src/components/AddTodo.js
import React, { useState } from 'react';
import { useAddTodoMutation } from '../apiSlice';
const AddTodo = () => {
const [title, setTitle] = useState('');
const [addTodo] = useAddTodoMutation();
const handleSubmit = async (e) => {
e.preventDefault();
if (title) {
await addTodo({
title,
completed: false,
});
setTitle('');
}
};
return (
<form onSubmit={handleSubmit}>
<input
type="text"
value={title}
onChange={(e) => setTitle(e.target.value)}
placeholder="Add a new todo"
/>
<button type="submit">Add Todo</button>
</form>
);
};
export default AddTodo;
```
3. Combine components in the main App:
```
// src/App.js
import React from 'react';
import TodoList from './components/TodoList';
import AddTodo from './components/AddTodo';
function App() {
return (
<div className="App">
<h1>RTK Query To-Do App</h1>
<AddTodo />
<TodoList />
</div>
);
}
export default App;
```
### Step 4: Running the Application
Now, you can run your application using the following command:
```
yarn start
```
Your application should be up and running at [http://localhost:3000](http://localhost:3000). You can add new to-dos and delete existing ones using the JSONPlaceholder API.
> Conclusion
In this guide, we covered how to create a simple To-Do application using RTK Query with an open-source API. We set up our Redux store, created API slices, and built components for listing and adding to-dos. RTK Query simplifies data fetching and caching, making it easier to manage server-side data in your applications.
Feel free to expand on this project by adding more features such as editing to-dos, marking them as completed, or integrating user authentication.
Happy coding! | rudragupta_dev | |
1,893,839 | Bridging the Gap: Building Trust Between Product and Engineering Teams | Companies often see their product and engineering teams compete instead of working together... | 0 | 2024-06-19T16:45:34 | https://jetthoughts.com/blog/bridging-gap-building-trust-between-product-engineering-teams-organization-structure/ | organization, structure, effectiveness | Companies often see their product and engineering teams compete instead of working together effectively. This lack of synergy causes a lack of trust and not rare scenarios where everyone, sooner or later, points fingers at others, thus slowing down the general development process. However, not only does the commitment of trust become the solution, but it also opens up the road to an easy and efficient work process and, consequently, promotes a friendly working environment.
Proven Strategies for Better Collaboration
------------------------------------------
To solve this problem, a few commonly accepted and efficient methods can improve the relationship between product and engineering teams:
1. **Cross-Functional Teams:** Combine product managers, engineers, and critical stakeholders into coherent teams. This way, they can thrash out the problems and understand what the staff has in mind.
2. **WIP (Work in Progress) Limits:** By restricting the number of ongoing tasks, teams can focus better and make small and frequent significant progress. This increases trust and progress.
3. **Trio Amigos:** It involves a product manager, a developer, and a quality analyst right from the start. This way, all viewpoints can be considered, so the discussions are not circular, and there are clear understandings.
4. **Continuous Deployment:** This practice involves regular deployment, which is the way to go because it will be possible to make regular updates on and improve the product. This way, the product can constantly be enhanced, and the feedback received immediately can catalyze a new culture toward consistent improvement.
5. **Retrospectives:** It is a good practice to regularly reflect on what's going well and what's not. Continuous discussions can still address and deal with problems.
The Challenge of Change
-----------------------
Despite these proven strategies, many companies need help with the same issues. So, what's holding them back?
1. **Change is tough.** It is always challenging to change established processes. Even though teams may not be satisfied with their existing workflows, they may still be averse to change.
2. **Ignorance:** Some companies may have never heard of these methods or benefitted from them. Education and spreading the word are essential.
3. **Local Culture of Blame and Misunderstanding:** The company's culture is central. The case against a blame and mistrust culture could be intense; shifting to a more cooperative mindset would need to be gradual and carefully conducted.
4. **Limited resources:** Introducing new strategies necessitates resources such as time, training, and occasionally financial investment that could pose difficulties for some companies.
Moving Ahead
------------
Companies should prioritize establishing good rapport with each other and being open to adopting new methods that improve alliances between product and engineering teams. For example, Crosslake Technologies implemented cross-functional teams, WIP limits, Trio Amigos, continuous deployment, and regular retrospectives. After implementation, it boosted productivity by 27% and decreased development time by 33%.
Then why wait?
--------------
The time to work on a more collaborative future is right now. As an engineer, product manager, or person holding a key stake in the project's success, you can champion change and fix current problems between your product and engineering teams. The future is in your hands, and with these strategies, you can curb negative factors, and the way becomes clear for innovation and efficiency. | jetthoughts_61 |
1,893,838 | Implementing Light/Dark Mode in Your Vite App with shadcn/ui | This article will guide you through implementing a light/dark mode feature in your Vite project using... | 0 | 2024-06-19T16:44:17 | https://dev.to/ashsajal/implementing-lightdark-mode-in-your-vite-app-with-shadcnui-1ae4 | webdev, javascript, react, tailwindcss | This article will guide you through implementing a light/dark mode feature in your Vite project using the powerful and user-friendly shadcn/ui library.
### 1. Setting Up the Theme Provider
First, we need to create a theme provider component that will manage the application's theme state. This component will handle switching between light, dark, and system themes, and persist the user's preference in local storage.
**components/theme-provider.tsx:**
```typescript
import { createContext, useContext, useEffect, useState } from "react";
type Theme = "dark" | "light" | "system";
type ThemeProviderProps = {
children: React.ReactNode;
defaultTheme?: Theme;
storageKey?: string;
};
type ThemeProviderState = {
theme: Theme;
setTheme: (theme: Theme) => void;
};
const initialState: ThemeProviderState = {
theme: "system",
setTheme: () => null,
};
const ThemeProviderContext = createContext<ThemeProviderState>(initialState);
export function ThemeProvider({
children,
defaultTheme = "system",
storageKey = "vite-ui-theme",
...props
}: ThemeProviderProps) {
const [theme, setTheme] = useState<Theme>(
() => (localStorage.getItem(storageKey) as Theme) || defaultTheme
);
useEffect(() => {
const root = window.document.documentElement;
root.classList.remove("light", "dark");
if (theme === "system") {
const systemTheme = window.matchMedia("(prefers-color-scheme: dark)")
.matches
? "dark"
: "light";
root.classList.add(systemTheme);
return;
}
root.classList.add(theme);
}, [theme]);
const value = {
theme,
setTheme: (theme: Theme) => {
localStorage.setItem(storageKey, theme);
setTheme(theme);
},
};
return (
<ThemeProviderContext.Provider {...props} value={value}>
{children}
</ThemeProviderContext.Provider>
);
}
export const useTheme = () => {
const context = useContext(ThemeProviderContext);
if (context === undefined)
throw new Error("useTheme must be used within a ThemeProvider");
return context;
};
```
**Explanation:**
- **`Theme` type:** Defines the possible theme values (`dark`, `light`, `system`).
- **`ThemeProviderProps`:** Defines the props accepted by the `ThemeProvider` component.
- **`ThemeProviderState`:** Defines the state of the theme provider, including the current theme and a function to update it.
- **`initialState`:** Sets the initial theme to "system", which will follow the user's system preference.
- **`ThemeProviderContext`:** Creates a React context to share the theme state throughout the application.
- **`ThemeProvider` component:**
- Uses `useState` to manage the current theme, initialized from local storage or the `defaultTheme` prop.
- Uses `useEffect` to update the document's class list based on the current theme.
- Provides the theme state and `setTheme` function through the context.
- **`useTheme` hook:** A custom hook to access the theme state and `setTheme` function within any component.
### 2. Wrapping Your Root Layout
Next, wrap your root layout component (`App.tsx` or similar) with the `ThemeProvider`. This ensures that all components within your application have access to the theme context.
**App.tsx:**
```typescript
import { ThemeProvider } from "@/components/theme-provider";
function App() {
return (
<ThemeProvider defaultTheme="dark" storageKey="vite-ui-theme">
{children}
</ThemeProvider>
);
}
export default App;
```
### 3. Adding a Mode Toggle
Finally, create a mode toggle component that allows users to switch between light, dark, and system themes.
**components/mode-toggle.tsx:**
```typescript
import { Moon, Sun } from "lucide-react";
import { Button } from "@/components/ui/button";
import {
DropdownMenu,
DropdownMenuContent,
DropdownMenuItem,
DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";
import { useTheme } from "@/components/theme-provider";
export function ModeToggle() {
const { setTheme } = useTheme();
return (
<DropdownMenu>
<DropdownMenuTrigger asChild>
<Button variant="outline" size="icon">
<Sun className="h-[1.2rem] w-[1.2rem] rotate-0 scale-100 transition-all dark:-rotate-90 dark:scale-0" />
<Moon className="absolute h-[1.2rem] w-[1.2rem] rotate-90 scale-0 transition-all dark:rotate-0 dark:scale-100" />
<span className="sr-only">Toggle theme</span>
</Button>
</DropdownMenuTrigger>
<DropdownMenuContent align="end">
<DropdownMenuItem onClick={() => setTheme("light")}>
Light
</DropdownMenuItem>
<DropdownMenuItem onClick={() => setTheme("dark")}>
Dark
</DropdownMenuItem>
<DropdownMenuItem onClick={() => setTheme("system")}>
System
</DropdownMenuItem>
</DropdownMenuContent>
</DropdownMenu>
);
}
```
**Explanation:**
- **`useTheme` hook:** Imports the `useTheme` hook to access the `setTheme` function.
- **`DropdownMenu` component:** Uses the `DropdownMenu` component from shadcn/ui to create a dropdown menu for the mode toggle.
- **`DropdownMenuItem` components:** Each item in the dropdown represents a theme option, with an `onClick` handler that calls `setTheme` with the corresponding theme.
### Conclusion
Now you have a fully functional light/dark mode implementation in your Vite project using shadcn/ui. Users can easily switch between themes and their preference will be saved in local storage. This provides a seamless and customizable experience for your users.
References : [Shadcn Ui docs
](https://ui.shadcn.com/docs/dark-mode/vite)
**Follow me in [X/Twitter](https://twitter.com/ashsajal1)** | ashsajal |
1,893,836 | Select Element in Array() to a new Array() JavaScript | JavaScript Array slice() Select elements: const fruits =... | 0 | 2024-06-19T16:44:09 | https://dev.to/tsitohaina/select-element-in-array-to-a-new-array-javascript-2805 | javascript, beginners |
JavaScript Array slice()
Select elements:
```
const fruits = ["Banana","Orange","Lemon","Apple","Mango"];
const citrus = fruits.slice(1, 3);
console.log(citrus);
```
Select elements using negative values:
```
const fruits = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
const myBest = fruits.slice(-3, -1);
console.log(myBest);
```
The slice() method returns selected elements in an array, as a new array.
The slice() method selects from a given start, up to a (not inclusive) given end.
The slice() method does not change the original array. | tsitohaina |
1,893,837 | Your Path to Success: How to Become a Self-Taught Frontend Developer in 2024 | Hey future frontend developer! Dreaming of building stunning websites and interactive user... | 0 | 2024-06-19T16:42:46 | https://dev.to/delia_code/your-path-to-success-how-to-become-a-self-taught-frontend-developer-in-2024-4jbk | webdev, beginners, programming, career | Hey future frontend developer! Dreaming of building stunning websites and interactive user interfaces? Great news—becoming a self-taught frontend developer is entirely within your reach. With the right resources, strategy, and a sprinkle of perseverance, you can embark on an exciting journey in web development. Let’s dive into the steps you need to take to become a self-taught frontend developer in 2024.
## Step 1: Set Clear Goals
### Define Your Why
Understanding why you want to become a frontend developer will keep you motivated. Whether it’s for a career change, personal projects, or freelancing, having a clear goal will guide your learning path.
### Choose Your Path
Frontend development focuses on the visual and interactive aspects of websites. Here’s what you’ll typically work with:
- **HTML**: The structure of web pages.
- **CSS**: The styling of web pages.
- **JavaScript**: The interactivity of web pages.
## Step 2: Learn the Basics
### Start with HTML and CSS
HTML and CSS are the building blocks of web development. Begin with these foundational languages:
**HTML Basics**:
- Elements and tags
- Attributes
- Document structure
**CSS Basics**:
- Selectors and properties
- Box model
- Flexbox and Grid for layout
### Utilize Free Resources
There are numerous free resources to get you started:
- **[FreeCodeCamp](https://www.freecodecamp.org/)**: Interactive coding lessons and projects.
- **[MDN Web Docs](https://developer.mozilla.org/en-US/)**: Comprehensive documentation and tutorials.
- **[Codecademy](https://www.codecademy.com/)**: Free and paid courses on various programming languages.
## Step 3: Move on to JavaScript
### JavaScript Fundamentals
JavaScript is essential for adding interactivity to websites. Focus on these key concepts:
- Variables and data types
- Functions and scope
- Events and DOM manipulation
### Online Learning Platforms
- **[JavaScript.info](https://javascript.info/)**: In-depth tutorials on JavaScript.
- **[Eloquent JavaScript](https://eloquentjavascript.net/)**: Free online book covering basics to advanced topics.
## Step 4: Build a Strong Foundation
### Practice, Practice, Practice
Code every day to solidify your knowledge. Try building small projects like a to-do list app or a simple calculator.
### Learn Version Control with Git
Git is essential for tracking changes in your code and collaborating with others:
- **[GitHub](https://github.com/)**: Host your repositories and showcase your projects.
## Step 5: Dive Deeper with Frameworks and Libraries
### Learn a JavaScript Framework
Choose a popular framework to streamline development and enhance your skills:
- **React**: A library for building user interfaces.
- **Vue.js**: A progressive framework for building UIs.
- **Angular**: A platform for building mobile and desktop web applications.
### Resources for Frameworks
- **[React Documentation](https://reactjs.org/docs/getting-started.html)**
- **[Vue.js Documentation](https://vuejs.org/v2/guide/)**
- **[Angular Documentation](https://angular.io/docs)**
## Step 6: Build Projects
### Start Small
Begin with small, manageable projects to apply your knowledge:
- Personal portfolio website
- Interactive quiz
- Weather app using an API
### Contribute to Open Source
Get involved in open source projects on GitHub to gain real-world experience and improve your skills.
### Build a Portfolio
Showcase your projects in a personal portfolio website. Include descriptions, code snippets, and links to live demos.
## Step 7: Engage with the Community
### Join Developer Communities
Participate in online communities to get support and network with other developers:
- **[Stack Overflow](https://stackoverflow.com/)**
- **[Reddit (r/learnprogramming)](https://www.reddit.com/r/learnprogramming/)**
### Attend Meetups and Conferences
Network with other developers by attending local meetups, hackathons, and tech conferences.
## Step 8: Apply for Jobs and Keep Learning
### Tailor Your Resume and Cover Letter
Highlight your skills, projects, and any relevant experience. Tailor your resume and cover letter for each job application.
### Prepare for Technical Interviews
Practice coding problems, system design questions, and behavioral interviews:
- **[LeetCode](https://leetcode.com/)**
- **[HackerRank](https://www.hackerrank.com/)**
### Never Stop Learning
Stay updated with the latest trends, tools, and best practices by following blogs, taking online courses, and experimenting with new technologies.
Becoming a self-taught frontend developer in 2024 is entirely achievable. With determination, the right resources, and a passion for learning, you can build a rewarding career in tech. Remember, the journey is just as important as the destination, so enjoy the process and keep coding!
Happy coding, and best of luck on your journey to becoming a self-taught frontend developer! | delia_code |
1,893,835 | HubSpot For Small Business | Unlock the potential of **[HubSpot for small business... | 0 | 2024-06-19T16:39:21 | https://dev.to/codepeddle/hubspot-for-small-business-2goa | hubspot, hubspotapi, hubspotmarketingagency | Unlock the potential of **[HubSpot for small business ](https://codeandpeddle.com/services/hubspot/
with Code and Peddle. Streamline your marketing, sales, and customer service operations to drive growth and efficiency. Learn more about how HubSpot can transform your business today. | codepeddle |
1,893,811 | Moving - From DigitalOcean to Cloudflare Pages | If you're interested, you may know that I use DigitalOcean to host this blog, with a modest... | 0 | 2024-06-19T16:14:49 | https://dev.to/hoaitx/moving-from-digitalocean-to-cloudflare-pages-1p5 | cloudflare, webdev | If you're interested, you may know that I use DigitalOcean to host this blog, with a modest configuration of 1GB RAM and 20GB SSD, which is sufficient for the TechStack that I have chosen. I call it sufficient because it still performs well with the current traffic, but deploying with Docker sometimes creates storage issues for the images it generates. Docker is known as the "hard drive killer" when you have many Images, combined with CI/CD setup, it's a "devastating combo". Just think, a 20GB hard drive, without subtracting the operating system, how can continuous deployment be possible? Occasionally, the server reports that the hard drive is full and I have to go in and delete some files.
By chance, I came across [Cloudflare Pages](https://pages.cloudflare.com/) which provides a solution for deploying various types of websites, such as Vue, React, Nuxt.js, Next.js... I was curious to see what it had to offer. I spent a whole week researching it. Finally, I decided to try migrating the two interface pages to see if it could be done.
## The Process of Moving
According to Cloudflare, Cloudflare Pages is a JAMstack platform for user interface developers and website deployment. Pages focuses on developers as it offers many solutions such as Git integration to support continuous deployment (CI/CD), as well as the deployment speed and performance of the application through it.
Realizing the potential of Cloudflare, I could move the two Front-end pages: the admin control panel (AdminCP) and the blog interface. The AdminCP is built with Vue.js using SPA, while the blog is built with Nuxt.js using SSR. For the SPA, the resource consumption is not much. As far as I can tell, it only takes up a few MB of memory because it is deployed through Nginx. On the other hand, SSR takes up quite a bit of memory, I must say it is the most memory-consuming among the running services. Simply because it is deployed through a Node.js server, and Node.js consumes a lot of memory. Both Vue and Nuxt.js are supported by Pages, so I can easily migrate these two pages. But before migrating, it is necessary to evaluate the required features.
First is the admin panel page, since it is built with Vue and uses SPA, migrating it to Pages isn't too complicated. All that needs to be done is to change the environment variables to receive the configuration during build.
As for the blog interface page, I came up with an idea: instead of using SSR as it is currently, why not try converting it to SSG? This way, I can use a command to generate the website into static HTML files and upload them to any host that supports static pages, not just Cloudflare Pages. Moreover, the speed will be much faster compared to regular SSR because there is no need to query the database and generate HTML code for each visit. Thinking about it, I spent a whole week modifying the Nuxt code to work well with SSG mode.
Finally, earlier this week, I completed the basic process of moving the two interface pages to Pages. Of course, there are still a few bugs that need to be fixed, but currently, it fully meets the reading and search needs of everyone.
## Benefits of Moving
I can save some resource costs for the admin panel and blog interface pages. Although it is not much, now I don't have to worry too much about server overload or any errors that may occur, as it can still function normally since Cloudflare has stored all the HTML.
The CI/CD process is shortened and less complicated. Previously, I needed to write many scripts to support this through Gitlab CI and Docker, but now, anytime I push code to Gitlab, it can build automatically.
I have switched DNS to Cloudflare to take advantage of their CDN infrastructure and data caching mechanism. The blog now has an impressive access speed.
Lastly, Web in the EDGE may become a trend in the future. Meaning you don't have to deploy a specific server to run a website, you can just run it through services like Pages. To learn more about this trend, readers can visit [The Future of the Web is on the Edge](https://deno.com/blog/the-future-of-web-is-on-the-edge).
## What's Left to Do
Although the majority of the migration process went smoothly, there are still some issues that need time to address.
The first is undiscovered or discovered but non-impactful errors. This issue only requires time to fix, or if readers discover any errors, they can leave a comment to inform me and I will fix them.
There are some features that become unnecessary or disabled after migrating to Pages, and they need to be removed to avoid confusion in the future.
Another issue is that there is no way to activate a notification after a successful or failed Page deployment. Hopefully, Cloudflare will soon add a notification feature or, at least, I will run a `curl` command along with the `npm run generate` command to send notifications to Telegram.
That's what's currently on the agenda. In the long run, it is to completely eliminate the need for a server and move all services to the cloud. Then I will be able to set up an automated system and not worry too much about infrastructure. | hoaitx |
1,893,834 | RECOVERY OF CRYPTOCURRENCY/ RECOVERY OF BTC contact :fundsrecoverychambers@gmail.com | I highly recommend the service of FUNDS RECOVERY CHAMBERS Solution for a fantastic job at recovering... | 0 | 2024-06-19T16:37:54 | https://dev.to/harry_peterson_b3185f558d/recovery-of-cryptocurrency-recovery-of-btc-contact-fundsrecoverychambersgmailcom-39od | bitcoin, usdt, cryptocurrency, ethereum | I highly recommend the service of FUNDS RECOVERY CHAMBERS Solution for a fantastic job at recovering my life savings which I naively put in a fake crypto investment scheme. I had a stressful situation going on and they were so patient with me and did help me through this. The staff members are very legit and good in explanation email them on fundsrecoverychambers at gmail dot com , not just classifying the problem and charging not without good response. I must commend them for recovering my money from the people who stole from me. If you are ever in need of such service, you can contact them via: (fundsrecoverychambers@gmail.com) “Thank you for your hard work, I really appreciate that you have been able to get my funds recovered, Their transparency and commitment to my recovery were admirable throughout the entire process even with the cost being fair. I am sending this testimony to affirm the legitimacy send a message on WhatsApp +44 7442 684963
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Telegram : https://t.me/Fundsrecoverychambers_crypto | harry_peterson_b3185f558d |
1,893,833 | bartowski/L3-70B-Euryale-v2.1-GGUF-torrent | L3-70B-Euryale-v2.1-Q4_K_M.gguf Size of remote file: 42.5... | 0 | 2024-06-19T16:36:38 | https://dev.to/zerroug/bartowskil3-70b-euryale-v21-gguf-torrent-8b9 | ai, machinelearning, beginners, chatgpt | L3-70B-Euryale-v2.1-Q4_K_M.gguf Size of remote file: 42.5 GB
https://aitorrent.zerroug.de/bartowski-l3-70b-euryale-v2-1-gguf/ | zerroug |
1,893,831 | Add Colors to Your Makeup Products with Cardboard Display Boxes | Like other industries, the cosmetics industry is growing every day. Consequently, there is a growing... | 0 | 2024-06-19T16:32:06 | https://dev.to/trudylalcantar/add-colors-to-your-makeup-products-with-cardboard-display-boxes-2i26 | design, google, blog, businesses | Like other industries, the cosmetics industry is growing every day. Consequently, there is a growing need for cardboard display boxes. The use of cosmetic items has increased over the past ten years. It now serves a lot more purposes than just enhancing skin tone. Women make use of it to their advantage. It shapes their jawline, elongates their nose, and enhances their eye shape. Yes, you can accomplish all of this with just makeup.
So why not alter the packaging for such an essential item? For this use, there are [Custom Display Boxes](https://imhpackaging.com/product-category/display-boxes/) on the market. They are cosmetics-related goods. A product's packaging conveys information to the consumer. It enables you to provide them with the necessary product details. Your packaging needs to be distinctive to stand out in the cosmetics industry. Numerous individuals buy cosmetics. Every day, they gain more fame. Without cosmetics, people find it difficult to function during the day. You must know how to spark interest in your products in a crowded market. The most effective approach to market your business is through custom beauty boxes.
A key component of expanding your business is using makeup kits. You may leave a lasting impression on your consumers by using unique packaging for cosmetics. Makeup manufacturers are constantly seeking innovative methods to enhance the appearance of their packaging boxes to grab more customers.
The requirements of the present day are distinct. The entertainment industry's growth has increased the need for cosmetics to previously unheard-of levels. Additionally, this field is expanding significantly. Everyone strives to stand out as the most attractive person in the space. The most important aspect of them today is their appearance. The transformation in the makeup business has increased demand for [Custom Makeup Packaging Boxes](https://imhpackaging.com/product/makeup-boxes/).
## Makeup is Absolute
Makeup has become a vital need in today's society. All women like to put on cosmetics before leaving the house. They lack confidence when they don't wear cosmetics for a party or a formal event. They routinely don beautiful lipstick or beauty products. Due to lipstick's rising popularity, there are now custom display packaging boxes on the market. It is straightforward for any lipstick firm to provide their usual product with the help of these custom display packaging.
Lipsticks are infamous for being fragile. For instance, extreme temperatures may cause them to lose their original shape and effectiveness. They may melt quite rapidly. Additionally, their outside packaging is relatively fragile. You may thus use ideal display packaging boxes.
## These Display Packaging Boxes Provide the Best Protection
No company owner wants their products to be delivered damaged. It doesn't generate any money for their company. Instead, their activities become boring. Good makeup companies have gone outside of this area due to the slander of their brand. To do this, they test a variety of strategies. However, wholesale custom boxes are perfect for their company.
Product security is the most critical consideration. Otherwise, you risk forgetting the most crucial necessity for your firm. As an experienced entrepreneur in the beauty industry, you can entirely rely on [Custom Cardboard Display Boxes](https://imhpackaging.com/product/cardboard-display-packaging/). They can make sure that your items reach their destination securely and safely. Once you have left this hectic road, you may concentrate on other aspects of your company.
Select packaging materials that are as nice as possible. Display packaging boxes should only be secure ones. Moisture and humidity are resisted by lamination and UV coatings. A packaging manufacturer must win over the hearts of its target clients after fulfilling all standards.
## Impressing Your Clients
Offer customers custom cardboard display packaging boxes and an enjoyable experience to assist them. Customers who keep a mental note of the brand and the products could be more inclined to purchase anything. Clients will appreciate what you do. Although you may not think these particulars matter, your consumers do. If a customer has a positive experience, they are more likely to return.
Successful brands are always seeking more sales. A remarkable distinction is nothing less than a victory. However, this accomplishment is no longer an issue because of the customization options available for your product. Use these boxes as needed. You may use these boxes as a marketing tool as well. Without a doubt, the relevance of these boxes is misunderstood by many new firms. These brands never achieve the same level of recognition as other well-known names.
To promote your goods, you must be noticeable to the customer. Making your beauty box stand out is the most crucial marketing strategy. Utilizing distinctive Custom Cosmetic Packaging[](https://imhpackaging.com/product-category/cosmetic-boxes/) might also significantly speed up the sale process. Target customers are lured to products when packaged in enticing and fashionable boxes. Cardboard display boxes can thus serve as a springboard for success in the marketing competition in the cosmetics sector!
| trudylalcantar |
1,893,827 | Spring Modulith: Modularization of a monolithic application | Modular Monolith is an architectural style where our source code is structured on the concept of... | 0 | 2024-06-19T16:31:15 | https://dev.to/shweta_kawale/spring-modulith-modularization-of-a-monolithic-application-16nn | productivity, opensource, spring | - Modular Monolith is an architectural style where our source code is structured on the concept of modules
- A monolithic application is broken up into distinct modules while still maintaining a single codebase and deployment.
**Features**:
**Application module dependencies**: Other modules should not access internal implementation components.
**Application Events**: To keep application modules as decoupled as possible from each other, their primary means of interaction should be event publication and consumption.
**Integration Testing Application Module**: Allows to run integration tests bootstrapping individual application modules in isolation or combination with others
**Documentation**: Can create documentation snippets in Asciidoc. Can produce C4 and UML component diagrams describing the relationships between the individual application modules.
**Advantages of Spring Modulith**
**Improved Maintainability**: Modular architecture promotes cleaner code, simplifies understanding, and facilitates easier maintenance as the application grows.
**Enhanced Testability**: Well-defined modules enable developers to write more focused and isolated unit and integration tests, leading to higher code quality.
**Scalability**: While not as horizontally scalable as microservices, Spring Modulith allows for vertical scaling by adding more resources to the application server.
**Faster Development**: Compared to the complexity of managing multiple services in microservices architecture, Spring Modulith offers a streamlined development process with a single codebase and deployment.
**Reduced Complexity**: For applications with tightly coupled functionalities that interact frequently, a single codebase in Spring Modulith can be more efficient.
**Further Reading**
[Spring Doc](https://docs.spring.io/spring-modulith/reference/index.html)
**Spring Modulith vs Microservices: **
| shweta_kawale |
1,893,830 | Node Boost: Clusters & Threads | Strategies to Optimize Performance in Node.js Applications This article will explore various... | 0 | 2024-06-19T16:30:51 | https://dev.to/m__mdy__m/node-boost-clusters-threads-22bm | node, programming, thread, clusters | **Strategies to Optimize Performance in Node.js Applications**
This article will explore various strategies to manage such scenarios effectively.
### Understanding the Event Loop Challenge
In Node.js, the event loop is a core concept that handles asynchronous operations. However, when there are too many tasks within the event loop, it can lead to performance bottlenecks. This issue becomes particularly significant in high-performance applications where handling numerous operations efficiently is crucial.
### Strategy 1: Utilizing Node.js Cluster Module
One effective approach to handle performance issues is by utilizing Node.js's cluster module. This module allows us to run multiple instances of our Node.js application, each with its own event loop, sharing the same server port. Here’s how it works:
1. **Multiple Node Instances**: Cluster module enables the creation of multiple Node.js instances. Each instance runs as a separate process, thereby allowing the application to utilize multiple CPU cores effectively.
2. **Load Balancing**: The Node.js cluster module helps distribute incoming requests across the multiple instances, balancing the load and ensuring no single instance becomes a bottleneck.
3. **Improved Performance**: By having several instances handling requests, the overall performance of the application improves, as tasks are processed concurrently across different instances.
While cluster module doesn't make Node.js multi-threaded, it simulates multi-threading to some extent by creating multiple event loops running in parallel.
**Overview:**
Cluster module in Node.js allows the application to create multiple instances of the Node.js process, each running on separate cores of the CPU. This helps distribute the load and ensures that no single instance is overwhelmed by heavy tasks.
**Implementation:**
1. **Setup:**
- Configure the Node.js application to run in cluster module.
- Use the `cluster` module to fork the primary process into multiple worker processes.
2. **Benefits:**
- Each worker process runs an independent event loop.
- The load is distributed across multiple CPU cores.
- Improved scalability and fault tolerance, as failure in one worker process does not affect the others.
**Example:**
```javascript
const cluster = require('cluster');
const http = require('http');
const numCPUs = require('os').availableParallelism();
if (cluster.isPrimary) {
for (let i = 0; i < numCPUs; i++) {
cluster.fork();
}
cluster.on('exit', (worker, code, signal) => {
console.log(`Worker ${worker.process.pid} died`);
});
} else {
http.createServer((req, res) => {
res.writeHead(200);
res.end('Hello World\n');
}).listen(8000);
}
```
### Strategy 2: Utilizing Worker Threads
Another approach to enhance performance is leveraging worker threads. Worker threads are particularly useful for executing CPU-intensive tasks. Here's how they can be integrated:
1. **Thread Pool**: Node.js includes a built-in thread pool via the libuv library. Worker threads can offload heavy computations to this thread pool, freeing up the main event loop to handle other tasks.
2. **Concurrency**: By utilizing worker threads, tasks are executed in parallel, significantly improving the application's throughput and responsiveness.
3. **Implementation**: Setting up worker threads involves creating a pool of threads that can execute functions independently. This setup is ideal for operations such as data processing, image manipulation, and complex calculations.
**Overview:**
Worker threads provide a way to execute JavaScript in parallel on multiple threads, enabling heavy computations to be offloaded from the main event loop.
**Implementation:**
1. **Setup:**
- Use the `worker_threads` module to create worker threads.
- Delegate CPU-intensive tasks to these worker threads.
2. **Benefits:**
- Offloads heavy computations, preventing the main thread from being blocked.
- Utilizes multi-threading capabilities within a single Node.js process.
- Improves the responsiveness of the application.
**Example:**
```javascript
const { Worker, isMainThread, parentPort } = require('worker_threads');
if (isMainThread) {
const worker = new Worker(__filename);
worker.on('message', message => {
console.log(`Received message from worker: ${message}`);
});
worker.postMessage('Start work');
} else {
parentPort.on('message', message => {
// Perform heavy computation
let result = heavyComputation();
parentPort.postMessage(result);
});
function heavyComputation() {
// Simulate a heavy task
let sum = 0;
for (let i = 0; i < 1e9; i++) {
sum += i;
}
return sum;
}
}
```
### Best Practices and Recommendations
While both cluster module and worker threads offer significant performance enhancements, it’s essential to consider their appropriate usage scenarios:
1. **Start with Cluster module**: For most applications, starting with cluster module is advisable. It is a well-tested approach that effectively utilizes multiple CPU cores without requiring significant changes to the application code.
2. **Leverage Worker Threads for CPU-Intensive Tasks**: If your application involves heavy computational tasks, consider integrating worker threads. This approach is more experimental but can provide substantial performance gains for specific use cases.
3. **Monitor and Test**: Always monitor the performance of your application under different loads and scenarios. Use performance testing tools to identify bottlenecks and evaluate the impact of these optimizations.
### Recommendations for Performance Optimization
1. **Start with Cluster Module:**
- Cluster module is a well-tested and reliable method to enhance performance.
- It's ideal for applications requiring improved load handling and fault tolerance.
2. **Experiment with Worker Threads:**
- For applications with specific heavy computational tasks, worker threads can be highly effective.
- This approach is more experimental but offers significant performance boosts for certain use cases.
3. **Combine Strategies:**
- In some scenarios, combining cluster module and worker threads can provide the best of both worlds.
- This hybrid approach can maximize the utilization of system resources.
### Conclusion
Optimizing Node.js applications for performance involves strategic use of available tools like cluster module and worker threads. By effectively distributing the workload and offloading heavy computations, developers can ensure their applications remain responsive and efficient. Starting with cluster module for its reliability and integrating worker threads for specific tasks can lead to substantial performance improvements. If you're eager to deepen your understanding of these algorithms, explore my GitHub repository ([algorithms-data-structures](https://github.com/m-mdy-m/algorithms-data-structures)). It offers a rich collection of algorithms and data structures for you to experiment with, practice, and solidify your knowledge.
**Note:** Some sections are still under construction, reflecting my ongoing learning journey—a process I expect to take 2-3 years to complete. However, the repository is constantly evolving.
The adventure doesn't stop with exploration! I value your feedback. If you encounter challenges, have constructive criticism, or want to discuss algorithms and performance optimization, feel free to reach out. Contact me on Twitter [@m__mdy__m](https://twitter.com/m__mdy__m) or Telegram: @m_mdy_m. You can also join the conversation on my GitHub account, [m-mdy-m](https://github.com/m-mdy-m). Let's build a vibrant learning community together, sharing knowledge and pushing the boundaries of our understanding. | m__mdy__m |
1,893,829 | Physical Symbol System Hypothesis | Today I came across 'Physical Symbol System Hypothesis'. This means that symbols becomes a huge... | 0 | 2024-06-19T16:27:54 | https://dev.to/thivyaamohan/physical-symbol-system-hypothesis-3ecc | ai | Today I came across 'Physical Symbol System Hypothesis'.
This means that symbols becomes a huge part on how we interact with the world.
If you see a stop sign you know you need to stop in the traffic , when you see the letter A, you know that the word would make a certain sound.
According to the hypothesis, if the program connects to these symbols then it becomes intelligent.
So, Philosopher John explained that sometimes the system can seem intelligent but they are not necessarily intelligent , they are just matching the patterns.
For example, you can try asking Siri , how do they feel like , they may say that they are fine but that doesn't mean that they are really feeling fine, they also don't know what you are asking. They are just matching the questions with pre-programmed response.
So Johan Searle argued that just matching questions is not true art of intelligence. They don't understand the meaning , they are just matching the patterns. | thivyaamohan |
1,893,774 | 40 Days Of Kubernetes (3/40) | Day 3/40 Multi Stage Docker Build - Docker Tutorial For Beginners Video... | 0 | 2024-06-19T16:24:06 | https://dev.to/sina14/40-days-of-kubernetes-340-1cam | docker, kubernetes, 40daysofkubernetes | ## Day 3/40
# Multi Stage Docker Build - Docker Tutorial For Beginners
[Video Link](https://www.youtube.com/watch?v=ajetvJmBvFo)
@piyushsachdeva
[Git Repository](https://github.com/piyushsachdeva/CKA-2024/)
[My Git Repo](https://github.com/sina14/40daysofkubernetes)
We're going to reduce the volume of our image which is built in Day 2, also for optimizing and improving the performance with multi-staging technique.
- Clone a repository include a simple app
```console
[node1] (local) root@192.168.0.8 ~
$ cd /opt ; git clone https://github.com/piyushsachdeva/todoapp-docker
Cloning into 'todoapp-docker'...
remote: Enumerating objects: 81, done.
remote: Counting objects: 100% (81/81), done.
remote: Compressing objects: 100% (45/45), done.
remote: Total 81 (delta 29), reused 73 (delta 26), pack-reused 0
Receiving objects: 100% (81/81), 186.07 KiB | 6.00 MiB/s, done.
Resolving deltas: 100% (29/29), done.
[node1] (local) root@192.168.0.8 /opt
$ cd todoapp-docker/
[node1] (local) root@192.168.0.8 /opt/todoapp-docker
$ ls
README.md package-lock.json package.json public src
```
- Create a Dockerfile
```
FROM node:18-alpine AS installer
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
RUN npm run build
FROM nginx:latest AS deployer
COPY --from=installer /app/build /usr/share/nginx/html
```
- Let's build image from Dockerfile
```console
[node1] (local) root@192.168.0.8 /opt/todoapp-docker
$ docker build -t multi-stage .
[+] Building 85.0s (14/14) FINISHED docker:default
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 243B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/nginx:latest 0.4s
=> [internal] load metadata for docker.io/library/node:18-alpine 0.4s
=> [installer 1/6] FROM docker.io/library/node:18-alpine@sha256:6937be95129321422103452e2883021cc4a96b63c32d7947187fcb25df84fc3f 5.8s
=> => resolve docker.io/library/node:18-alpine@sha256:6937be95129321422103452e2883021cc4a96b63c32d7947187fcb25df84fc3f 0.0s
=> => sha256:05412f5b9ed819c373a2535804e473a155fc91bfb7adf469ec2312e056a9e87f 1.16kB / 1.16kB 0.0s
=> => sha256:e7d39d4d8569a6203be5b7a118d4d92526b267087023a49ee0868f7c50190191 7.23kB / 7.23kB 0.0s
=> => sha256:d25f557d7f31bf7acfac935859b5153da41d13c41f2b468d16f729a5b883634f 3.62MB / 3.62MB 0.2s
=> => sha256:f6124930634921d33d69a1a8b5848cb40d0b269e79b4c37c236cb5e4d61a2710 39.83MB / 39.83MB 0.9s
=> => sha256:22a81a0f8d1c30ce5a5da3579a84ab4c22fd2f14cb33863c1a752da6f056dc18 1.38MB / 1.38MB 0.2s
=> => sha256:6937be95129321422103452e2883021cc4a96b63c32d7947187fcb25df84fc3f 1.43kB / 1.43kB 0.0s
=> => extracting sha256:d25f557d7f31bf7acfac935859b5153da41d13c41f2b468d16f729a5b883634f 0.6s
=> => sha256:bd06542006fda4279cb2edd761a84311c1fdbb90554e9feaaf078a3674845742 447B / 447B 0.2s
=> => extracting sha256:f6124930634921d33d69a1a8b5848cb40d0b269e79b4c37c236cb5e4d61a2710 4.2s
=> => extracting sha256:22a81a0f8d1c30ce5a5da3579a84ab4c22fd2f14cb33863c1a752da6f056dc18 0.2s
=> => extracting sha256:bd06542006fda4279cb2edd761a84311c1fdbb90554e9feaaf078a3674845742 0.0s
=> [deployer 1/2] FROM docker.io/library/nginx:latest@sha256:56b388b0d79c738f4cf51bbaf184a14fab19337f4819ceb2cae7d94100262de8 9.1s
=> => resolve docker.io/library/nginx:latest@sha256:56b388b0d79c738f4cf51bbaf184a14fab19337f4819ceb2cae7d94100262de8 0.0s
=> => sha256:56b388b0d79c738f4cf51bbaf184a14fab19337f4819ceb2cae7d94100262de8 10.27kB / 10.27kB 0.0s
=> => sha256:dca6c1f16ab4ac041e55a10ad840e6609a953e1b2ee1ec3e4d3dfe2b4dfbbf34 2.29kB / 2.29kB 0.0s
=> => sha256:dde0cca083bc75a0af14262b1469b5141284b4399a62fef923ec0c0e3b21f5bc 7.16kB / 7.16kB 0.0s
=> => sha256:2cc3ae149d28a36d28d4eefbae70aaa14a0c9eab588c3790f7979f310b893c44 29.15MB / 29.15MB 0.8s
=> => sha256:a97f9034bc9b7e813d93db97482046e20f581e1a80ddeda9b331c3ec6ed1cd8b 41.83MB / 41.83MB 1.2s
=> => sha256:24436676f2decbc5ed11c2e5786faa3dd103bc0fc738a2033b2f1aaab57226ad 398B / 398B 0.9s
=> => sha256:9571e65a55a3fd4ccd461b4fbaf5e8e38242317add94cb088268b70d6d7d08b2 627B / 627B 0.9s
=> => sha256:0b432cb2d95eea3d638db7e7cfb51eb7d7828f87c31d7a8c40ac5bb0278ca118 959B / 959B 0.9s
=> => extracting sha256:2cc3ae149d28a36d28d4eefbae70aaa14a0c9eab588c3790f7979f310b893c44 4.5s
=> => sha256:928cc9acedf0354de565f85d9df9d519e44a29a585d6c19a37a8aeb02e25212c 1.21kB / 1.21kB 1.0s
=> => sha256:ca6fb48c6db48342a3905bf65037e97543080a052a5f169b4b40b8c83b850f41 1.40kB / 1.40kB 1.0s
=> => extracting sha256:a97f9034bc9b7e813d93db97482046e20f581e1a80ddeda9b331c3ec6ed1cd8b 2.9s
=> => extracting sha256:9571e65a55a3fd4ccd461b4fbaf5e8e38242317add94cb088268b70d6d7d08b2 0.0s
=> => extracting sha256:0b432cb2d95eea3d638db7e7cfb51eb7d7828f87c31d7a8c40ac5bb0278ca118 0.0s
=> => extracting sha256:24436676f2decbc5ed11c2e5786faa3dd103bc0fc738a2033b2f1aaab57226ad 0.0s
=> => extracting sha256:928cc9acedf0354de565f85d9df9d519e44a29a585d6c19a37a8aeb02e25212c 0.0s
=> => extracting sha256:ca6fb48c6db48342a3905bf65037e97543080a052a5f169b4b40b8c83b850f41 0.0s
=> [internal] load build context 0.1s
=> => transferring context: 939.78kB 0.0s
=> [installer 2/6] WORKDIR /app 0.0s
=> [installer 3/6] COPY package*.json ./ 0.1s
=> [installer 4/6] RUN npm install 49.3s
=> [installer 5/6] COPY . . 0.1s
=> [installer 6/6] RUN npm run build 27.7s
=> [deployer 2/2] COPY --from=installer /app/build /usr/share/nginx/html 0.1s
=> exporting to image 0.0s
=> => exporting layers 0.0s
=> => writing image sha256:09ae8f9d05aca8faa94bcc5eb42ea1a8e8eeb10b94431ef349462e97e028c04c 0.0s
=> => naming to docker.io/library/multi-stage
```
- Let's see the image size
```console
[node1] (local) root@192.168.0.8 /opt/todoapp-docker
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
multi-stage latest 09ae8f9d05ac 41 seconds ago 189MB
```
- Run a container from the image
```console
[node1] (local) root@192.168.0.8 /opt/todoapp-docker
$ docker run -it -d -p 3000:3000 --name for-fun multi-stage
e726d7446aad41a8a196231f4937ff72daec2e13d07a131b6df416b38545a420
[node1] (local) root@192.168.0.8 /opt/todoapp-docker
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e726d7446aad multi-stage "/docker-entrypoint.…" 6 seconds ago Up 5 seconds 80/tcp, 0.0.0.0:3000->3000/tcp for-fun
```
- If you need to view the log of the container because it may have some issues
```console
[node1] (local) root@192.168.0.8 /opt/todoapp-docker
$ docker logs for-fun
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2024/06/19 15:46:08 [notice] 1#1: using the "epoll" event method
2024/06/19 15:46:08 [notice] 1#1: nginx/1.27.0
2024/06/19 15:46:08 [notice] 1#1: built by gcc 12.2.0 (Debian 12.2.0-14)
2024/06/19 15:46:08 [notice] 1#1: OS: Linux 4.4.0-210-generic
2024/06/19 15:46:08 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2024/06/19 15:46:08 [notice] 1#1: start worker processes
2024/06/19 15:46:08 [notice] 1#1: start worker process 29
2024/06/19 15:46:08 [notice] 1#1: start worker process 30
2024/06/19 15:46:08 [notice] 1#1: start worker process 31
2024/06/19 15:46:08 [notice] 1#1: start worker process 32
2024/06/19 15:46:08 [notice] 1#1: start worker process 33
2024/06/19 15:46:08 [notice] 1#1: start worker process 34
2024/06/19 15:46:08 [notice] 1#1: start worker process 35
2024/06/19 15:46:08 [notice] 1#1: start worker process 36
```
- Going inside the container with sh
```console
[node1] (local) root@192.168.0.8 /opt/todoapp-docker
$ id
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel),11(floppy),20(dialout),26(tape),27(video)
[node1] (local) root@192.168.0.8 /opt/todoapp-docker
$ docker exec -it for-fun sh
# id
uid=0(root) gid=0(root) groups=0(root)
```
- We are still inside the container and can check where we are. the issue we can find is we didn't set WORKDIR when we were build the image from stage two (deployer).
```console
# pwd
/
# ls -alh
total 4.0K
drwxr-xr-x 1 root root 39 Jun 19 15:46 .
drwxr-xr-x 1 root root 39 Jun 19 15:46 ..
-rwxr-xr-x 1 root root 0 Jun 19 15:46 .dockerenv
lrwxrwxrwx 1 root root 7 Jun 12 00:00 bin -> usr/bin
drwxr-xr-x 2 root root 6 Jan 28 21:20 boot
drwxr-xr-x 5 root root 360 Jun 19 15:46 dev
drwxr-xr-x 1 root root 41 Jun 13 18:29 docker-entrypoint.d
-rwxrwxrwx 1 root root 1.6K Jun 13 18:28 docker-entrypoint.sh
drwxr-xr-x 1 root root 19 Jun 19 15:46 etc
drwxr-xr-x 2 root root 6 Jan 28 21:20 home
lrwxrwxrwx 1 root root 7 Jun 12 00:00 lib -> usr/lib
lrwxrwxrwx 1 root root 9 Jun 12 00:00 lib64 -> usr/lib64
drwxr-xr-x 2 root root 6 Jun 12 00:00 media
drwxr-xr-x 2 root root 6 Jun 12 00:00 mnt
drwxr-xr-x 2 root root 6 Jun 12 00:00 opt
dr-xr-xr-x 1216 root root 0 Jun 19 15:46 proc
drwx------ 2 root root 37 Jun 12 00:00 root
drwxr-xr-x 1 root root 23 Jun 19 15:46 run
lrwxrwxrwx 1 root root 8 Jun 12 00:00 sbin -> usr/sbin
drwxr-xr-x 2 root root 6 Jun 12 00:00 srv
dr-xr-xr-x 13 root root 0 Mar 9 06:43 sys
drwxrwxrwt 2 root root 6 Jun 12 00:00 tmp
drwxr-xr-x 1 root root 19 Jun 12 00:00 usr
drwxr-xr-x 1 root root 19 Jun 12 00:00 var
#
```
- Check what is in the directory of nginx
```console
# cd /usr/share/nginx/html
# ls -ltr
total 44
-rw-r--r-- 1 root root 497 May 28 13:22 50x.html
-rw-r--r-- 1 root root 3870 Jun 19 15:42 favicon.ico
-rw-r--r-- 1 root root 67 Jun 19 15:42 robots.txt
-rw-r--r-- 1 root root 492 Jun 19 15:42 manifest.json
-rw-r--r-- 1 root root 9664 Jun 19 15:42 logo512.png
-rw-r--r-- 1 root root 5347 Jun 19 15:42 logo192.png
drwxr-xr-x 4 root root 27 Jun 19 15:43 static
-rw-r--r-- 1 root root 644 Jun 19 15:43 index.html
-rw-r--r-- 1 root root 517 Jun 19 15:43 asset-manifest.json
```
Note: Exit from container simply with Ctrl^D :)
- Inspect the container with docker inspect and we can see lots of details
```console
[node1] (local) root@192.168.0.8 /opt/todoapp-docker
$ docker inspect for-fun
[
{
"Id": "e726d7446aad41a8a196231f4937ff72daec2e13d07a131b6df416b38545a420",
"Created": "2024-06-19T15:46:07.30754639Z",
"Path": "/docker-entrypoint.sh",
"Args": [
"nginx",
"-g",
"daemon off;"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 9867,
"ExitCode": 0,
"Error": "",
"StartedAt": "2024-06-19T15:46:08.187858664Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:09ae8f9d05aca8faa94bcc5eb42ea1a8e8eeb10b94431ef349462e97e028c04c",
"ResolvConfPath": "/var/lib/docker/containers/e726d7446aad41a8a196231f4937ff72daec2e13d07a131b6df416b38545a420/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/e726d7446aad41a8a196231f4937ff72daec2e13d07a131b6df416b38545a420/hostname",
"HostsPath": "/var/lib/docker/containers/e726d7446aad41a8a196231f4937ff72daec2e13d07a131b6df416b38545a420/hosts",
"LogPath": "/var/lib/docker/containers/e726d7446aad41a8a196231f4937ff72daec2e13d07a131b6df416b38545a420/e726d7446aad41a8a196231f4937ff72daec2e13d07a131b6df416b38545a4
20-json.log",
"Name": "/for-fun",
"RestartCount": 0,
"Driver": "overlay2",
"Platform": "linux",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "docker-default",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {
"3000/tcp": [
{
"HostIp": "",
"HostPort": "3000"
}
]
},
"RestartPolicy": {
"Name": "no",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": null,
"ConsoleSize": [
36,
174
],
"CapAdd": null,
"CapDrop": null,
"CgroupnsMode": "host",
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "private",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"NanoCpus": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": [],
"BlkioDeviceReadBps": [],
"BlkioDeviceWriteBps": [],
"BlkioDeviceReadIOps": [],
"BlkioDeviceWriteIOps": [],
"CpuPeriod": 0,
"CpuQuota": 0,
"CpuRealtimePeriod": 0,
"CpuRealtimeRuntime": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"DeviceCgroupRules": null,
"DeviceRequests": null,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": null,
"OomKillDisable": false,
"PidsLimit": null,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0,
"MaskedPaths": [
"/proc/asound",
"/proc/acpi",
"/proc/kcore",
"/proc/keys",
"/proc/latency_stats",
"/proc/timer_list",
"/proc/timer_stats",
"/proc/sched_debug",
"/proc/scsi",
"/sys/firmware",
"/sys/devices/virtual/powercap"
],
"ReadonlyPaths": [
"/proc/bus",
"/proc/fs",
"/proc/irq",
"/proc/sys",
"/proc/sysrq-trigger"
]
},
"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/7461cb96e13b9547b0bb8582830ed7535a7ed1fce673ff20ec91971cad8c0ae3-init/diff:/var/lib/docker/overlay2/qr6p3aj4j7ogp6ma5uptr2prv/diff:/var/lib/docker/overlay2/89a3ce54bd7e435ce2347dfe4bb52ddb17811fbc9fc332e8f09be09694a22e41/diff:/var/lib/docker/overlay2/4067d9b01a9abc35719ac4c1431a21d550ea2e7a84da83670d333961897b9f1d/diff:/var/lib/docker/overlay2/4a7ef1ef0ec499781b92cddf4aee52f82c845806013a6765bef88d3fae4e0b74/diff:/var/lib/docker/overlay2/727fdd566ca9cc66145b5f7a8cda01af6f24fc907ed54c06aa6e7fada36abd2c/diff:/var/lib/docker/overlay2/e1b862aaff039698244b46d4a6a41e469a27371d9dbb2501ad35d0e7074a9562/diff:/var/lib/docker/overlay2/c406ed264e0e46f8d290f603f350f1fb465a416f7500a98b4395b0a84690916e/diff:/var/lib/docker/overlay2/377199bc762e38cc7ef7949f3cd4fc80348870563f545384510aa55a69cd2db1/diff",
"MergedDir": "/var/lib/docker/overlay2/7461cb96e13b9547b0bb8582830ed7535a7ed1fce673ff20ec91971cad8c0ae3/merged",
"UpperDir": "/var/lib/docker/overlay2/7461cb96e13b9547b0bb8582830ed7535a7ed1fce673ff20ec91971cad8c0ae3/diff",
"WorkDir": "/var/lib/docker/overlay2/7461cb96e13b9547b0bb8582830ed7535a7ed1fce673ff20ec91971cad8c0ae3/work"
},
"Name": "overlay2"
},
"Mounts": [],
"Config": {
"Hostname": "e726d7446aad",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"3000/tcp": {},
"80/tcp": {}
},
"Tty": true,
"OpenStdin": true,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"NGINX_VERSION=1.27.0",
"NJS_VERSION=0.8.4",
"NJS_RELEASE=2~bookworm",
"PKG_RELEASE=2~bookworm"
],
"Cmd": [
"nginx",
"-g",
"daemon off;"
],
"Image": "multi-stage",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": [
"/docker-entrypoint.sh"
],
"OnBuild": null,
"Labels": {
"maintainer": "NGINX Docker Maintainers <docker-maint@nginx.com>"
},
"StopSignal": "SIGQUIT"
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "68d106bf1259ed6eaf6787b43a7f80c765171b227c7ecc7e7731f5569977b6a8",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"3000/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "3000"
}
],
"80/tcp": null
},
"SandboxKey": "/var/run/docker/netns/68d106bf1259",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "35da5057f13fade059cae7e2d3adfeeb6dcce89324ffc841b1c67b1761ac6105",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:02",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "be9af4aaabd83b6caeb1317b4a3f8b8441e89e2f22ea0b9f49e6d50ebf775777",
"EndpointID": "35da5057f13fade059cae7e2d3adfeeb6dcce89324ffc841b1c67b1761ac6105",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02",
"DriverOpts": null
}
}
}
}
]
```
- Some best practice for writing Dockerfile
1. Use Multi-stage Builds
2. Order Dockerfile Commands Appropriately
3. Use Small Docker Base Images
4. Minimize the Number of Layers
5. Use Unprivileged Containers
6. Prefer COPY Over ADD
7. Cache Python Packages to the Docker Host
8. Run Only One Process Per Container
9. Prefer Array Over String Syntax
10. Understand the Difference Between ENTRYPOINT and CMD
11. Include a HEALTHCHECK Instruction
| sina14 |
1,889,720 | But you don't look like a web developer | When you think of a web developer, what comes to your mind? Most people from my private life outside... | 0 | 2024-06-19T16:23:02 | https://dev.to/webdevqueen/but-you-dont-look-like-a-web-developer-27m6 | webdev, discuss, career, womenintech | When you think of a web developer, what comes to your mind? Most people from my private life outside technology would describe such human as a man, often wearing glasses, hunched over a laptop in a dimly lit room, surrounded by empty coffee cups and energy drink cans. Maybe he’s an introvert, someone who’s more comfortable with code than with people, lacking in social skills and physical fitness. This stereotype is so ingrained in our collective consciousness that anyone who doesn’t fit this mold might be met with surprise, or even skepticism.
## “But you don’t look like a web developer.”
This phrase is something I hear almost every time I introduce myself as a web developer (sometimes even in the STEM environment, but mostly in private life). You see, I am a web developer, but I don’t fit the outdated stereotype. I’m a woman, nearly 30 years old, in good shape, and I like sports. I take pride in my appearance, use make up, get my nails done, and care for myself because I want to be attractive. Yet, my abilities and passion for web development are no less than anyone else’s.
The image of the "ideal" web developer is not just a harmless stereotype; it’s a narrow definition that excludes the vast diversity within the tech community. The reality is that web developers come from all walks of life. They are men and women, young and old, extroverts and introverts, athletes and artists. Our skills and passions shouldn't be measured by our appearance or lifestyle choices, yet they still do.
In fact, diversity in web development brings about a richer and more creative environment. Different perspectives lead to innovative solutions and more user-friendly products. When we cling to outdated stereotypes, we not only limit our view but also discourage many talented individuals who might feel they don’t belong.
For me, being a web developer is about problem-solving, creativity, and continuous learning. It’s about staying curious and pushing the boundaries of what technology can do. It doesn’t require me to sacrifice my social life, neglect my physical health, or conform to an image that doesn’t represent who I am.
I want to challenge the notion of what a web developer should look like. Next time you meet someone in tech, resist the urge to judge their capabilities based on their appearance. Instead, focus on their skills, passion, and the unique perspective they bring to the table.
In a world where technology is constantly evolving, so too should our understanding of those who create it. Let’s embrace the diversity within our community and move beyond the stereotypes. After all, it’s not about how we look, but what we can build together. | webdevqueen |
1,893,812 | Can AI Help with Repository Base Code Understanding? | Understanding and maintaining large codebases is a common challenge in software development, leading... | 0 | 2024-06-19T16:21:34 | https://dev.to/michal_kovacik/can-ai-help-with-repository-base-code-understanding-1la | Understanding and maintaining large codebases is a common challenge in software development, leading to significant time and resource expenditure. Addressing this issue is essential for improving developer productivity and reducing technical debt.
**What is code?** Code is a recipe for solving a concrete problem. With just the code, you can reverse-engineer to understand which problem it solves and how it does so. This reverse engineering allows you to formulate user stories describing the problem. From these user stories, AI can generate new code. Is this just theoretical, or can current technology help create tools to solve this problem?
In DTIT, particularly within AI4Coding, we’re thinking about technological debt and how to address it.
We start from the premise that the current state of AI systems is not able to offer the in-depth contextual understanding necessary for effective coding support at the repository level. Users of AI tools for code generation and completion often encounter reliability issues when dealing with larger codebases.
Our research indicates that RAG (retrieval-augmented generation) can be beneficial but has limits. Even concepts like Agentic with Chain of Thoughts or Tree of Thoughts are insufficient and can be costly. What else can help? Abstract Syntax Trees (ASTs) are useful, but they don’t provide a repository-level understanding of the code.
Current research shows that knowledge graphs excel in modeling complex relationships and dependencies within code across entire repositories. We utilize RAG, Agentic approaches, and ASTs, but knowledge graphs have been a game-changer for our product—Advanced Coding Assistant.
**Why do we still have “assistant” in the title?** Even though we are trying to use all known best approaches, keeping the developer in the loop is crucial.
So, my answer to my introductory theoretical question is YES, but we are not in the Harry Potter universe, and AI is not a magic wand, and you cannot expect a “one click” solution. However, providing developers with tools that enhance code understanding at the project level enables them to not only work faster but also tackle tasks that were previously unsolvable.
For more information, please read the articles by my colleagues:
https://medium.com/@cyrilsadovsky/advanced-coding-chatbot-knowledge-graphs-and-asts-0c18c90373be
https://medium.com/@ziche94/building-knowledge-graph-over-a-codebase-for-llm-245686917f96
Stay tune for more information. We will definitely share results from our research. | michal_kovacik | |
1,893,820 | How can developers leverage gaming monetization strategies and mobile game advertising to thrive on the best game platform? | Developers can thrive on the best game platform by effectively leveraging gaming monetization... | 0 | 2024-06-19T16:20:27 | https://dev.to/claywinston/how-can-developers-leverage-gaming-monetization-strategies-and-mobile-game-advertising-to-thrive-on-the-best-game-platform-5hce | gamedev, gamedeveloper, mobilegames, androidgames | Developers can thrive on the [**best game platform**](https://medium.com/@adreeshelk/how-to-play-hundreds-of-games-on-your-lock-screen-without-downloading-anything-4f03e0173441?utm_source=referral&utm_medium=Medium&utm_campaign=Nostra) by effectively leveraging gaming monetization strategies and mobile game advertising. Implementing diverse monetization methods, such as in-app purchases, subscription models, and rewarded ads, boosts revenue while maintaining player engagement. [**Mobile game advertising**](https://nostra.gg/articles/The-Future-of-Gaming-Platform-is-here.html?utm_source=referral&utm_medium=article&utm_campaign=Nostra), including interstitials and native ads, can be seamlessly integrated to reach target audiences without disrupting the gaming experience. A robust gaming platform provides tools and analytics to optimize ad placements and track performance, ensuring maximum profitability. By combining these monetization strategies with targeted advertising, developers can significantly increase their revenue and player retention, ensuring success on the best game platforms. | claywinston |
1,893,810 | Integrating a Basic TensorFlow Model on AWS | Welcome to the exciting world of integrating machine learning models with cloud computing! In this... | 0 | 2024-06-19T16:12:49 | https://dev.to/aws-builders/integrating-a-basic-tensorflow-model-on-aws-81a | tensorflow, aws, model, ai | Welcome to the exciting world of integrating machine learning models with cloud computing! In this article, we'll guide you through the process of deploying a basic TensorFlow model on Amazon Web Services (AWS). We'll explore the services you can leverage, discuss some practical use cases, and provide a hands-on example of a TensorFlow model that converts voice into text. Let's dive in!
## Introduction
TensorFlow is a powerful open-source library for machine learning and deep learning applications. AWS offers a suite of services that make it easier to deploy, manage, and scale your machine-learning models. By integrating TensorFlow with AWS, you can take advantage of the cloud's scalability, security, and ease of use to bring your models to production.
## AWS Services for TensorFlow Integration
To successfully integrate a TensorFlow model on AWS, you'll need to familiarize yourself with several key services:
- **Amazon SageMaker**: A fully managed service that provides every developer and data scientist with the ability to build, train, and deploy machine learning models quickly.
- **AWS Lambda**: A serverless compute service that lets you run code without provisioning or managing servers, ideal for running lightweight TensorFlow models.
- **Amazon S3**: A scalable object storage service that you can use to store data and models.
- **AWS API Gateway**: A service to create, publish, maintain, monitor, and secure APIs at any scale, which can be used to expose your TensorFlow model as an API.
- **Amazon Polly**: A service that turns text into lifelike speech, useful if you need to create interactive voice applications.
- **Amazon Transcribe**: A service that automatically converts speech into text, which can be used in conjunction with your TensorFlow model for voice recognition tasks.
## Use Cases for TensorFlow on AWS
Here are some practical use cases for integrating TensorFlow models on AWS:
### 1. Real-Time Voice Transcription
Use a TensorFlow model to convert spoken language into text in real-time, which is useful for applications like live captioning, transcription services, and voice-controlled interfaces.
### 2. Sentiment Analysis
Deploy a TensorFlow model to analyze customer reviews or social media posts to determine the sentiment (positive, negative, neutral), helping businesses understand customer feedback better.
### 3. Image Recognition
Use TensorFlow to build image recognition models for applications in security, retail (like recognizing products on shelves), and healthcare (such as identifying anomalies in medical images).
### 4. Predictive Maintenance
Implement predictive maintenance solutions by analyzing data from sensors and predicting when equipment will fail, allowing businesses to perform maintenance before issues occur.
## Example: Voice-to-Text Conversion Using TensorFlow on AWS
Now, let's walk through an example of integrating a basic TensorFlow model that listens to voice and converts it into text.
### Step 1: Setting Up Your Environment
#### 1.1 Create an S3 Bucket
Store your TensorFlow model and any other necessary files in an S3 bucket.
```bash
aws s3 mb s3://your-bucket-name
```
#### 1.2 Prepare Your TensorFlow Model
Train your TensorFlow model locally and save it in the S3 bucket.
```python
# Example of saving a trained model
model.save('model.h5')
```
#### 1.3 Upload the Model to S3
```bash
aws s3 cp model.h5 s3://your-bucket-name/model.h5
```
### Step 2: Deploying the Model with Amazon SageMaker
#### 2.1 Create a SageMaker Notebook Instance
Use the SageMaker console to create a notebook instance for deploying your model.
#### 2.2 Load and Deploy the Model
Open the SageMaker notebook and run the following code:
```python
import boto3
import sagemaker
from sagemaker.tensorflow import TensorFlowModel
sagemaker_session = sagemaker.Session()
role = 'your-iam-role'
model = TensorFlowModel(model_data='s3://your-bucket-name/model.h5',
role=role,
framework_version='2.3.0')
predictor = model.deploy(initial_instance_count=1, instance_type='ml.m4.xlarge')
```
### Step 3: Creating a Lambda Function
#### 3.1 Create a Lambda Function
Use the AWS Lambda console to create a new function. This function will load the TensorFlow model and process audio input.
#### 3.2 Write the Lambda Code
```python
import json
import boto3
import tensorflow as tf
s3_client = boto3.client('s3')
def lambda_handler(event, context):
# Get the audio file from the event
bucket = event['Records'][0]['s3']['bucket']['name']
key = event['Records'][0]['s3']['object']['key']
audio_file = s3_client.get_object(Bucket=bucket, Key=key)['Body'].read()
# Load the TensorFlow model
model = tf.keras.models.load_model('/tmp/model.h5')
with open('/tmp/audio.wav', 'wb') as f:
f.write(audio_file)
# Process the audio file and convert it to text
# Placeholder for actual audio processing and prediction
text = "predicted text from model"
return {
'statusCode': 200,
'body': json.dumps(text)
}
```
### Step 4: Setting Up API Gateway
#### 4.1 Create a REST API
Use API Gateway to create a new REST API.
#### 4.2 Create a Resource and Method
Create a resource (e.g., `/transcribe`) and a POST method that triggers the Lambda function.
### Step 5: Testing the Integration
#### 5.1 Upload an Audio File to S3
Upload an audio file that you want to transcribe to the S3 bucket.
#### 5.2 Invoke the API
Send a POST request to the API Gateway endpoint with the audio file information.
```bash
curl -X POST https://your-api-id.execute-api.region.amazonaws.com/prod/transcribe -d '{"bucket": "your-bucket-name", "key": "audio-file.wav"}'
```
## Conclusion
Integrating TensorFlow models with AWS services opens up a world of possibilities for deploying scalable and efficient machine learning applications. Whether you're working on voice transcription, sentiment analysis, image recognition, or predictive maintenance, AWS provides the tools and services to bring your models to life. We hope this guide has given you a clear roadmap to start your journey with TensorFlow on AWS.
# Happy coding! | mursalfk |
1,893,253 | Design Patterns | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-19T16:12:26 | https://dev.to/suchitra_13/design-patterns-4l9n | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
## Explainer
Design patterns are reusable solutions to common software design problems. They guide object creation, composition, and interaction, improving code readability and maintainability. Key types include Creational, Structural, and Behavioral patterns, each addressing specific issues.
<!-- Explain a computer science concept in 256 characters or less. -->
## Additional Context
<!-- Please share any additional context you think the judges should take into consideration as it relates to your One Byte Explainer. -->
<!-- Team Submissions: Please pick one member to publish the submission and credit teammates by listing their DEV usernames directly in the body of the post. -->
<!-- Don't forget to add a cover image to your post (if you want). -->
<!-- Thanks for participating! --> | suchitra_13 |
1,893,809 | Top Next.JS Boilerplates in 2024 | Here are some of the free(open-source) and premimum boilerplates you should check out in 2024. This... | 0 | 2024-06-19T16:12:02 | https://dev.to/boilerplates_14e05bc5988b/top-nextjs-boilerplates-in-2024-4i8p | nextjs, webdev, javascript, programming | Here are some of the free(open-source) and premimum boilerplates you should check out in 2024.
This list is sourced from [www.nextjsboilerplateslist.com/](https://www.nextjsboilerplateslist.com/) free tool. Using this platform you can filter boilerplates based on the technologies you know which speeds up your development time. Check it out
## Premium Boilerplates
- [ShipFast](https://shipfa.st/?via=sasi)
The NextJS boilerplate with all you need to build your SaaS, AI tool, or any other web app and make your first $ online fast.
- [UseNextBase](https://nextbase-starter-kit.lemonsqueezy.com?aff=yjXY9)
Build your SaaS product in a weekend.
- [Divjoy](https://divjoy.com/?via=nbl)
Build SaaS products and landing pages 10x faster with our advanced codebase generator
- [shipixen](https://shipixen.com?aff=yjXY9)
Go from nothing → deployed Next.js codebase without ever touching config. Ship a beautifully designed Blog, Landing Page, SaaS, Waitlist or anything in between. Today.
- [supastarter.dev](https://supastarter.dev?aff=yjXY9)
Save time and focus on your business with this scalable and production-ready SaaS boilerplate. It includes authentication, multi-tenancy, i18n, billing, a landing page and much more!
- [saasplanet](https://saasplanet.org/)
Build your product this weekend. The feature rich, complete and modern NextJS starting point for developers looking to build faster.
- [shipped.club](https://shipped.club?aff=yjXY9)
Launch your startup in days, not months The Next.js Startup Boilerplate for busy founders, with all you need to build and launch your startup soon.
- [indie-starter.dev](https://indie-starter.dev?aff=yjXY9)
Quick setup, easy to customize and expand to fit various project requirements.
- [NextJS Directory](https://www.nextjsdirectory.com/)
NextJSDirectory is a boilerplate with all you need to focus on the business and earn recurring revenue through sponsorships, affiliations or ads
- [launchfa.st](https://code-templates.lemonsqueezy.com/?aff=yjXY9)
Comprehensive starter kits for SEO, Analytics, Storage, Auth, Payments, Blogs, and Email - everything a developer needs to kickstart their project.
- [supasaas.io](https://www.supasaas.io/)
Ship with SupaSaaS and dominate your competition in the search results. Our built-in SEO features put your SaaS ahead from day one, maximizing visibility and driving more traffic to your site.
- [makerkit.dev](https://makerkit.lemonsqueezy.com?aff=yjXY9)
Build unlimited SaaS products with any SaaS Starter Kit. Save months of work and focus on building a profitable business. Get lifetime access to all the kits for only $299.
- [NextSaaS](https://nextsaas.live/)
The All-In-One Boilerplate to Transform Your Product into SaaS in Hours
- [saas-ui](https://saas-ui.dev?aff=yjXY9)
Saas UI is a React component library and starterkit that doesn't get in your way and helps you build intuitive SaaS products with speed.
- [nextjet.dev](https://www.nextjet.dev/)
A Next.js serverless boilerplate,including all the necessary features for your SaaS startup, so you can focus on building your product.
- [hypersaas](https://www.hypersaas.dev/)
Whether you're a startup seeking to disrupt markets or a developer looking to enhance your productivity, HyperSaas has everything you need to hit the ground running.
- [nextless.js](https://nextlessjs.com/)
The fastest way to build scalable and production-ready SaaS products. It includes Authentication, Payment, Teams, Dashboard, Landing Page, Emails. Save you months of development time so you can focus on your business.
- [BoilerCode.co](https://boilercode.co/)
Ship Your SaaS Super Fast
- [turbost.art](https://turbost.art/)
The up-to-date Next.js boilerplate you need to launch your next project. Get your ideas out of your head and into the world.
- [kickstart](https://kickstart.app/)
Kickstart is the Next.js boilerplate for building apps fast.
- [Code Assist](https://codeassi.st/)
Simplify your project with CodeAssist, an all-in-one scaling solution. No more wasted time on complex integrations. Build with confidence.
## Free Boilerplates
- [blazity/next-enterprise](https://github.com/Blazity/next-enterprise)
💼 An enterprise-grade Next.js boilerplate for high-performance, maintainable apps. Packed with features like Tailwind CSS, TypeScript, ESLint, Prettier, testing tools, and more to accelerate your development.
- [sanity-io/next-sanity](https://github.com/sanity-io/next-sanity)
Sanity.io toolkit for Next.js
- [vercel/platforms](https://github.com/vercel/platforms)
A full-stack Next.js app with multi-tenancy and custom domain support. Built with Next.js App Router and the Vercel Domains API
- [DarkGuy10/NextJS-Electron-Boilerplate](https://github.com/DarkGuy10/NextJS-Electron-Boilerplate)
A boilerplate for building desktop apps with Electron and NextJS.
- [Saas-Starter-Kit/Saas-Kit-supabase](https://github.com/Saas-Starter-Kit/Saas-Kit-supabase)
A template for building Software-as-Service (SAAS) apps with Reactjs, Nextjs and Supabase
- [Saas-Starter-Kit/Saas-Kit-prisma](https://github.com/Saas-Starter-Kit/Saas-Kit-prisma)
🚀A template for building Software-as-Service (SAAS) apps with Reactjs, Nextjs, Prisma and OpenAI integration
- [Prismic Starter](https://github.com/prismicio-community/nextjs-starter-prismic-multi-page)
Next.js and Prismic multi-page starter
- [vercel/commerce](https://github.com/vercel/commerce)
Next.js Commerce Boilerplate
- [vercel/ai-chatbot](https://github.com/vercel/ai-chatbot/tree/main)
A full-featured, hackable Next.js AI chatbot built by Vercel
- [shadcn-ui/taxonomy](https://github.com/shadcn-ui/taxonomy)
An open source application built using the new router, server components and everything new in Next.js 13.
- [kvnxiao/tauri-nextjs-template](https://github.com/kvnxiao/tauri-nextjs-template)
A Tauri + Next.js (SSG) template, with TailwindCSS, opinionated linting, and GitHub Actions preconfigured
- [guptabhaskar/nextjs-boilerplate](https://github.com/guptabhaskar/nextjs-boilerplate)
About Boilerplate and Starter for Next JS 13+, Sequelize, Tailwind CSS 3.2.4 and TypeScript
- [hafffe/nextjs-sanity-template](https://github.com/hafffe/nextjs-sanity-template)
Starter Sanity + Next.js
- [ixartz/Next-js-Boilerplate](https://github.com/ixartz/Next-js-Boilerplate)
🚀🎉📚 Boilerplate and Starter for Next.js 14+ with App Router and Page Router support, Tailwind CSS 3.4 and TypeScript ⚡️ Made with developer experience first: Next.js + TypeScript + ESLint + Prettier + Husky + Lint-Staged + Jest + Testing Library + Cypress + Storybook + Commitlint + VSCode + Netlify + PostCSS + Tailwind CSS
- [async-labs/saas](https://github.com/async-labs/saas/)
async-labs/saas
- [d-ivashchuk/cascade](https://github.com/d-ivashchuk/cascade)
About Best open-source SaaS boilerplate. Free, powerful & extendable.
- [kvnxiao/tauri-nextjs-template](https://github.com/kvnxiao/tauri-nextjs-template)
A Tauri + Next.js (SSG) template, with TailwindCSS, opinionated linting, and GitHub Actions preconfigured
- [saltyshiomix/nextron](https://github.com/saltyshiomix/nextron)
⚡ Next.js + Electron ⚡
- [mmedr25/nextjs14-typeorm](https://github.com/mmedr25/nextjs14-typeorm)
Boilerplate using Nextjs and TypeORM. | boilerplates_14e05bc5988b |
1,893,808 | ARGONIX HACK TECH / BEST CRYPTOCURRENCY RECOVERY SERVICES | WhatApp: +1 (206) 234‑9907 Website: https://argonixhacktech.com My profound passion for music... | 0 | 2024-06-19T16:11:17 | https://dev.to/feetrikki_hermanni_49f4e3/argonix-hack-tech-best-cryptocurrency-recovery-services-1llf | productivity | WhatApp: +1 (206) 234‑9907
Website: https://argonixhacktech.com
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| feetrikki_hermanni_49f4e3 |
1,893,807 | Umbraco CodeGarden24 | It’s the last Friday afternoon, of CodeGarden24 and I am sitting here in Odense watching old and new... | 0 | 2024-06-19T16:11:06 | https://dev.to/ravi_motha_21868e7318d7dd/umbraco-codegarden24-2ibe | umbraco, codegarden, devlife | It’s the last Friday afternoon, of CodeGarden24 and I am sitting here in Odense watching old and new friends wander away from storms pakhus to their respective homes and lives.
**So I got a little reflective.**
I first discovered Umbraco and its community in 2010/2011 and attended my first CodeGarden in 2011, and find myself feeling a bit like David Byrne and asking myself. “How did I get here?”
**General Impressions**
CodeGarden this year represents the past and present perfectly. It’s been fun, it’s had great content (and well done for all those who went up on whichever stage),
I think the community (which I think is its actual superpower) is still healthy based on conversations, the number of newbies, and the fact that loads of “older” faces made the journey. I especially want to mention Dean Leigh who hasn’t been well recently but has finally made it as the most joyous of CodeGarden first timers, and to see his face every so often has been an absolute pleasure.
I’m also really pleased to see the number of new faces not only attending but attending and speaking. I have heard Georgina Bidder’s talk was great, and I’m gutted I missed it, So George more talks please and I say the same for Joke van Hamme. More of this please
What does this all mean? Everyone will have their different reasoning . whether its reaffirming their connection, reconnecting with their tribe, or finding new passion and or ideas to go away and work on.. I hope everyone who came took away one new friend.
**Overall Impressions**
overall I feel good because my takeaway is Umbraco is growing, the community is strong and that is good. Both in the short term, and the long term for Moriyama, our customers and other companies in the Umbraco ecosphere.
## My highlights
• Seeing my friends and my sort of second family
• My chats with Poul & Kevin jump
• Being able to help Briony Clark from GSK out by introducing and talking about migrations with her, Janae (ProWorks) and Arkadiusz (Etch)
• Dean Leigh
• Not being injured by the bull, and unlike most doing most of my ride one handed
• All the talks were recorded, meaning that chats weren’t truncated, if you have never done it before the chat track is ace. And the new social space was a real triumph
## It could be better still if
• We had better vegetarian options (I love the food but seeing my vegan, or other dietary restricted friends nip off to storms or realize its broccoli for the 3rd time... maybe even some tofu)
• It’s never long enough (and we could have more talks and they could stretch the envelope in the project manager stuff, case studies, and longer format)
• I’m always genuinely pleased to see we have a growing tribe of women at CodeGarden, but I want to see more brown faces and other faces... so super props for the initiative supported by by HQ and Rhiannon helping Robert Foster in going to Nepal….we need more of that in India (with new MVP Dhanesh Kumar MJ from Kerala), South America the Balkans, Greece, South Africa so help us crack India and all the other places
• I was 5 minutes late for the introduction (Jamie from shout this is on you for going back for your lanyard)… sorry for not being there in time Karla
• Unique swag (also avoid brown), and more of the larger sizes
## This Time, Next Year...
Next year Blend vs Moriyama hammerschalagen, but the challenge goes to bump, true, crumpled dog, gibe, proworks, marcel digital etc
all photos from the Umbraco HQ feed. yes there were two pictures of me
| ravi_motha_21868e7318d7dd |
1,893,806 | Como a programação ajudou minha viagem para a Coreia do Sul | Há um tempo atrás, viajei para a Coreia do Sul! Honestamente, eu não estaria tão empolgado se não... | 0 | 2024-06-19T16:09:45 | https://dev.to/outofyourcomfortzone/como-a-programacao-ajudou-minha-viagem-para-a-coreia-do-sul-1c99 | Há um tempo atrás, viajei para [**a Coreia do Sul**](https://foradazonadeconforto.com/como-se-preparar-para-visitar-a-coreia-do-sul/)! Honestamente, eu não estaria tão empolgado se não fosse pelas minhas habilidades de programação. Aqui está como a codificação tornou minha viagem muito mais tranquila:
**1. Barreiras linguísticas? Sem problemas!** Posso criar um aplicativo incrível que traduz placas em coreano em tempo real. Nada de adivinhar possíveis significados.
**2. Itinerário personalizado:** Eu posso criar um pequeno script em Python para organizar meu itinerário. Ele seleciona os melhores lugares para visitar com base nos meus interesses e ainda verifica a previsão do tempo para sugerir os melhores dias para cada atividade.
**3. Rastreador de orçamento de viagem:** Usando um aplicativo rápido consigo acompanhar meus gastos. Nada de pânico no final da viagem sobre para onde foi todo o meu dinheiro.
**4. Recomendações locais:** É possível configurar um bot para vasculhar blogs e fóruns locais em busca de joias escondidas que os turistas geralmente perdem.
Explorando os mercados de tecnologia de Seul, caminhando no Seoraksan e relaxando nas praias de Busan - tudo graças a uma programação útil. Habilidades tecnológicas para vencer! | outofyourcomfortzone | |
1,893,801 | How programming helped my trip to South Korea | A while ago, I traveled to South Korea! Honestly, I wouldn’t be as pumped if it weren’t for my... | 0 | 2024-06-19T16:06:47 | https://dev.to/outofyourcomfortzone/how-programming-helped-my-trip-to-south-korea-2o7p | A while ago, I traveled to [**South Korea**](https://www.outofyourcomfortzone.net/13-places-to-visit-in-south-korea-outside-seoul/)! Honestly, I wouldn’t be as pumped if it weren’t for my programming skills. Here’s how coding is making my trip so much smoother:
**1. Language Barrier? No Problem!** I’ve got this sweet app that translates Korean signs in real-time. No more guessing games with menus or street signs.
**2. Personalized Itinerary:** With a little Python is possible to organize my itinerary. It pulls in the best spots to visit based on my interests and even checks the weather forecast to suggest the best days for each activity. Hello, efficient sightseeing!
**3. Travel Budget Tracker:** Using a quick app I can keep tabs on my spending. No more end-of-trip panic attacks about where all my money went.
**4. Local Recommendations:** It is possible to set up a bot to scrape local blogs and forums for hidden gems that tourists usually miss. Authentic experiences, here I come!
Exploring Seoul’s tech markets, hiking in Seoraksan, and chilling in Busan’s beaches—all thanks to some handy programming. Tech skills for the win! | outofyourcomfortzone | |
1,893,800 | Day 23 of my progress as a vue dev | About today Today I worked on another landing page, even though it is not completed yet I'm trying my... | 0 | 2024-06-19T16:01:20 | https://dev.to/zain725342/day-23-of-my-progress-as-a-vue-dev-4j58 | webdev, vue, typescript, tailwindcss | **About today**
Today I worked on another landing page, even though it is not completed yet I'm trying my best to push the boundaries with this one by trying new things to make it more engaging and also to implement skills I haven't used previously to have my grip on those.
**What's next?**
I will be completing this landing page and moving to the next one and once I feel like I have some substantial growth I will reach out any potential clients that might want this service and offer it to them for free so I can bring their ideas to life as well as learn new things along the way.
**Improvements required**
I need to work on responsiveness of my pages and also the positioning of elements so they don't look much cluttered and odd on any one section of the screen.
Wish me luck! | zain725342 |
1,893,799 | 전역 상태 관리 Recoil과 Zustand | Recoil과 Zustand는 React 애플리케이션에서 상태 관리를 도와주는 라이브러리이다. 두 라이브러리 근본적인 기능은 같지만, 서로 다른 방식으로 상태 관리를 구현하여... | 0 | 2024-06-19T15:59:47 | https://dev.to/hxxtae/jeonyeog-sangtae-gwanri-recoilgwa-zustand-d2k | recoil, zustand | Recoil과 Zustand는 React 애플리케이션에서 상태 관리를 도와주는 라이브러리이다. 두 라이브러리 근본적인 기능은 같지만, 서로 다른 방식으로 상태 관리를 구현하여 사용된다.
## Recoil
Recoil은 Facebook에서 개발한 상태 관리 라이브러리로, React와 긴밀하게 통합되어 있으며, 주로 atom과 selector를 사용한다. Recoil은 비동기 상태 관리와 Tree Shaking을 지원하며, 복잡한 상태 관리가 필요한 큰 규모의 애플리케이션에 적합하다.
### Atom과 Selector:
- Atom : 상태의 기본 단위 이다. 상태를 읽고 쓸 수 있다.
- Selector : 파생된 상태를 생성하는 데 사용된다. 다른 atom 또는 selector의 값을 기반으로 새로운 값을 계산할 수 있다.
### 비동기 상태 관리:
- Recoil은 비동기 상태 관리 기능을 내장하고 있어, 네트워크 요청과 같은 비동기 작업을 쉽게 처리할 수 있다.
### Tree Shaking:
- 사용하지 않는 상태와 로직은 번들에서 제거되어 성능을 최적화할 수 있다.
```js
// store.js
import { atom, selector } from 'recoil';
export const textState = atom({
key: 'textState', // unique ID (with respect to other atoms/selectors)
default: '', // 초기값 설정(default value)
});
export const charCountState = selector({
key: 'charCountState', // unique ID
get: ({ get }) => {
const text = get(textState);
return text.length;
},
});
```
```jsx
// App.js
import React from 'react';
import { RecoilRoot } from 'recoil';
import CharacterCounter from './CharacterCounter';
function App() {
return (
<RecoilRoot>
<CharacterCounter />
</RecoilRoot>
);
}
export default App;
```
```jsx
// CharacterCounter.js
import { useRecoilState, useRecoilValue } from 'recoil';
import { textState, charCountState } from '/store'
function CharacterCounter() {
return (
<div>
<TextInput />
<CharacterCount />
</div>
);
}
function TextInput() {
const [text, setText] = useRecoilState(textState); // text 구독
const onChange = (event) => {
setText(event.target.value);
};
return (
<div>
<input type="text" value={text} onChange={onChange} />
<br />
Echo: {text}
</div>
);
}
function CharacterCount() {
const count = useRecoilValue(charCountState); // count 구독
return <>Character Count: {count}</>;
}
export default CharacterCounter;
```
## Zustand
Zustand는 가볍고 사용하기 쉬운 상태 관리 라이브러리로, 단순한 상태 관리 패턴을 제공한다. 간단한 API로 작은 규모의 프로젝트에 적합하다.
### 초소형 및 간단한 API:
- Zustand는 매우 간단한 API를 제공하며, 상태를 설정하고 구독하는 방식이 직관적이다.
### 미들웨어 지원:
- 상태 변경을 감지하고, 로깅, 비동기 작업 등을 처리할 수 있는 미들웨어를 지원한다.
### React 훅 기반
- 훅을 사용하여 상태를 관리하며, recoil 처럼 별도의 Provider를 사용할 필요가 없다.
### 좋은 성능:
- 블필요한 리렌더링을 최소화하고, 작은 번들 크기로 성능을 최적화 할 수 있다.
```js
// store.js
import create from 'zustand';
const useStore = create((set) => ({
text: '',
setText: (text) => set({ text }),
charCount: () => get().text.length,
}));
```
```jsx
// App.js
import CharacterCounter from './CharacterCounter';
function App() {
return (
<div>
<CharacterCounter />
</div>
);
}
export default App;
```
```jsx
// CharacterCounter.js
import { useStore } from './store';
function CharacterCounter() {
return (
<div>
<TextInput />
<CharacterCount />
</div>
);
}
function TextInput() {
const { text, setText } = useStore((state) => state); // text 구독
const onChange = (event) => {
setText(event.target.value);
};
return (
<div>
<input type="text" value={text} onChange={onChange} />
<br />
Echo: {text}
</div>
);
}
function CharacterCount() {
const charCount = useStore((state) => state.charCount); // charCount 구독
return <>Character Count: {charCount}</>;
}
export default CharacterCounter;
```
💡
> Zustand 내부에 store를 만드는 코드를 보자면, setState가 `partial`과 `replace`로 나눠져 있는데, `partial`은 state의 일부분만 변경하고 싶을 때 사용하고, `replace`는 state를 완전히 새로운 값으로 변경하고 싶을 때 사용한다.
> subscirbe 함수는 listener를 등록하는데, listener는 마찬가지로 Set 형태로 선언되어 추가와 삭제, 그리고 중복 관리가 용이하게끔 설계되어 있다. 즉, **상태값이 변경될 때 리렌더링이 필요한 컴포넌트에 전파될 목적**으로 만들어 진 것이다.
> destroy는 listener를 초기화하는 역할을 한다.
> createStore는 이러한 getState, setState, subscribe, destory를 반환한다.
## 비교
### 복잡성:
- Recoil은 Atom과 Selector 등 더 많은 개념이 필요하여 복잡하지만, 복잡한 상태 관리에 유리하다. 반면 Zustand는 단순한 API로 직관적이며, 작은 프로젝트에 적합하다.
### 비동기 상태 관리:
- Recoil은 비동기 상태 관리를 기본적으로 지원한다. Zustand 역시 비동기 작업을 처리할 수 있지만, Recoil 만큼의 기본 지원은 없다.
### 퍼포먼스:
- Recoil의 경우 Tree Shaking과 최적화된 상태 관리로 큰 애플리케이션에서도 좋은 성능을 보인다. 반면 Zustand는 매우 가벼운 라이브러리로 불필요한 리렌더링을 최소화하여 성능을 최적화 한다.
- Recoil은 라이브러리 업데이트 주기가 오래 되어 안정성이 낮으며, Zustand는 최근에 나왔지만 최신 업데이트로 안정성이 개선되고 있다.
## 마무리
Recoil과 Zustand는 각각의 장단점이 있으며, 프로젝트의 요구 사항에 따라 적절한 라이브러리를 선택하여 사용하면 된다.
| hxxtae |
1,893,796 | 슬롯사이트 | 온라인 카지노 산업이 급성장하면서, 안전하고 신뢰할 수 있는 플랫폼의 중요성도 더욱 부각되고 있습니다. 그중에서도 티파니카지노는 많은 플레이어들에게 다양한 혜택을 제공하며 두각을... | 0 | 2024-06-19T15:53:59 | https://dev.to/jackpotslot08/seulrossaiteu-3a2b | 온라인 카지노 산업이 급성장하면서, 안전하고 신뢰할 수 있는 플랫폼의 중요성도 더욱 부각되고 있습니다. 그중에서도 티파니카지노는 많은 플레이어들에게 다양한 혜택을 제공하며 두각을 나타내고 있습니다. 슬롯사이트 및 바카라사이트로서, 티파니카지노는 풍부한 게임 선택과 안전한 환경을 자랑하며, 카지노 게임의 즐거움을 극대화하고 있습니다.
다양한 슬롯 이벤트와 쿠폰을 제공하는 메이저 슬롯사이트, 아리아카지노
아리아카지노는 다양한 슬롯 이벤트와 풍성한 쿠폰 혜택으로 유명합니다. 이 메이저 슬롯사이트는 신규 및 기존 회원 모두에게 매력적인 보너스를 제공하며, 끊임없이 업데이트되는 이벤트로 플레이어들의 흥미를 지속적으로 유지합니다. 슬롯 게임의 메카로서, 아리아카지노는 고품질의 게임 경험을 제공하여 많은 팬들을 보유하고 있습니다.
**_[슬롯사이트](https://www.outlookindia.com/plugin-play/slot-site-12-billion-jackpot-winner-recommendation-best-7-slot-sites)_**
아리아카지노 슬롯사이트와 같은 명성을 지닌 슬롯의 메카, FM카지노
FM카지노는 아리아카지노와 견줄 만한 명성을 지닌 슬롯사이트로, 슬롯의 메카로 불립니다. 다양한 슬롯 게임과 더불어 강력한 보너스와 이벤트가 끊임없이 제공되어, 플레이어들에게 지속적인 즐거움을 선사합니다. 특히 FM카지노는 안정적인 운영과 신뢰성을 바탕으로, 많은 플레이어들의 사랑을 받고 있습니다.
강력한 쿠폰과 친구추천 이벤트가 있는 슬롯사이트, 고카지노
고카지노는 플레이어들에게 강력한 쿠폰 혜택과 친구추천 이벤트를 제공하는 것으로 유명합니다. 신규 회원을 위한 웰컴 보너스부터 친구를 추천할 때마다 추가 보너스를 받을 수 있는 프로그램까지, 고카지노는 다양한 방식으로 플레이어들의 참여를 유도하고 있습니다. 이러한 혜택은 플레이어들에게 더 많은 기회를 제공하며, 카지노 게임의 재미를 배가시킵니다.
매니토토 커뮤니티, 그들이 자랑하는 슬롯의 메카, 헤븐카지노
헤븐카지노는 매니토토 커뮤니티 내에서 자랑하는 슬롯의 메카로, 무제한 이벤트와 다양한 게임 옵션을 제공합니다. 이 카지노는 플레이어들이 자유롭게 즐길 수 있는 환경을 제공하며, 꾸준히 업데이트되는 이벤트와 프로모션으로 인기를 끌고 있습니다. 안전한 환경에서 다양한 게임을 즐길 수 있다는 점에서 헤븐카지노는 많은 사랑을 받고 있습니다.
무제한 이벤트와 제한 없는 안전한 슬롯 & 카지노사이트, 홈카지노
홈카지노는 무제한 이벤트와 함께 제한 없이 안전하게 게임을 즐길 수 있는 슬롯 & 카지노사이트로 명성을 얻고 있습니다. 다양한 게임 옵션과 더불어, 플레이어들에게 지속적인 혜택을 제공하는 이벤트가 특징입니다. 이러한 무제한 이벤트는 플레이어들에게 더 많은 기회를 제공하며, 홈카지노의 인기를 더욱 높이고 있습니다.
입출금 스트레스 제로! 칼 입출금을 자랑하는 슬롯사이트
온라인 카지노에서 중요한 요소 중 하나는 빠르고 안전한 입출금 시스템입니다. 홈카지노는 이러한 부분에서 탁월한 성과를 보여주며, 입출금 스트레스 제로를 자랑합니다. 칼 입출금 시스템을 통해 플레이어들은 언제든지 편리하게 자금을 관리할 수 있으며, 이는 홈카지노의 큰 장점 중 하나로 작용합니다. 빠르고 정확한 입출금 서비스는 플레이어들에게 신뢰감을 주며, 게임을 즐기는 데 있어 중요한 요소로 작용합니다.
결론
티파니카지노, 아리아카지노, FM카지노, 고카지노, 헤븐카지노, 홈카지노 등은 각기 다른 특징과 장점을 가진 슬롯사이트로, 다양한 이벤트와 혜택을 제공하며 많은 플레이어들에게 사랑받고 있습니다. 안전하고 신뢰할 수 있는 환경에서 다양한 게임을 즐길 수 있다는 점에서, 이들 카지노는 온라인 게임의 재미를 극대화하고 있습니다. 각 사이트의 독특한 이벤트와 빠른 입출금 시스템은 플레이어들에게 지속적인 만족감을 제공하며, 온라인 카지노의 새로운 기준을 제시하고 있습니다. | jackpotslot08 | |
1,893,791 | Why not try json.fans | 探索 JSON.fans：简化 JSON 数据处理的新工具 在现代软件开发中，JSON（JavaScript Object... | 0 | 2024-06-19T15:41:20 | https://dev.to/by_5cb2ea4980a0622e036d4e/why-not-try-jsonfans-385j | 探索 [JSON.fans](https://json.fans)：简化 JSON 数据处理的新工具
在现代软件开发中，JSON（JavaScript Object Notation）已经成为数据交换的标准格式之一。无论是前端开发还是后端开发，JSON 都扮演着至关重要的角色。然而，处理 JSON 数据有时可能会变得复杂和繁琐。幸运的是，JSON.fans 提供了一个简化 JSON 数据处理的新工具，让开发者能够更加高效地工作。
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1,892,366 | Explain a computer science concept in 256 characters or less | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-19T15:51:36 | https://dev.to/madelene/explain-a-computer-science-concept-in-256-characters-or-less-18e7 | devchallenge, cschallenge, computerscience, beginners | ---
title: Explain a computer science concept in 256 characters or less
published: true
tags: devchallenge, cschallenge, computerscience, beginners
---
*This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
## Explainer
Binary search is like playing "Guess the Number." You start in the middle of a sorted list, check if that's your number, and then decide if you need to look higher or lower. Repeat until you find the number or run out of places to look. Super quick and efficient! | madelene |
1,893,795 | 슬롯사이트 | 티파니카지노는 슬롯과 바카라를 비롯한 다양한 카지노 게임을 제공하는 안전한 사이트로, 많은 플레이어들에게 큰 혜택을 주고 있습니다. 이 사이트는 철저한 보안 시스템과 사용자 친화적인... | 0 | 2024-06-19T15:50:43 | https://dev.to/jackpotslot08/seulrossaiteu-43e9 | 티파니카지노는 슬롯과 바카라를 비롯한 다양한 카지노 게임을 제공하는 안전한 사이트로, 많은 플레이어들에게 큰 혜택을 주고 있습니다. 이 사이트는 철저한 보안 시스템과 사용자 친화적인 인터페이스를 통해 안전하고 즐거운 게임 환경을 제공합니다. 슬롯 게임에서의 무제한 이벤트와 다양한 쿠폰 혜택을 통해 사용자들은 더 많은 보상을 받을 수 있으며, 이는 티파니카지노의 큰 장점 중 하나입니다.
다양한 슬롯 이벤트와 쿠폰을 제공하는 메이저 슬롯사이트, 아리아카지노
아리아카지노는 다양한 슬롯 이벤트와 쿠폰을 제공하는 메이저 슬롯사이트로서 그 명성을 쌓아왔습니다. 아리아카지노는 신선한 게임 콘텐츠와 끊임없는 프로모션을 통해 사용자들에게 지속적인 흥미를 제공합니다. 특히, 주기적으로 제공되는 슬롯 이벤트와 특별 쿠폰은 사용자들이 더 많은 즐거움을 느낄 수 있도록 돕습니다. 아리아카지노의 이러한 혜택은 많은 플레이어들에게 큰 인기를 끌고 있습니다.
**_[슬롯사이트](https://www.outlookindia.com/plugin-play/slot-site-12-billion-jackpot-winner-recommendation-best-7-slot-sites)_**
아리아카지노 슬롯사이트와 같은 명성을 지닌 슬롯의 메카, FM카지노
FM카지노는 아리아카지노와 같이 슬롯의 메카로 잘 알려져 있습니다. 이 사이트는 다양한 슬롯 게임을 제공하며, 강력한 쿠폰과 친구추천 이벤트를 통해 사용자들에게 추가적인 보상을 제공합니다. FM카지노의 주요 특징 중 하나는 플레이어들이 친구를 초대하면 추가 보너스를 받을 수 있다는 점입니다. 이러한 이벤트는 사용자들의 참여를 유도하며, 커뮤니티의 성장을 촉진합니다.
강력한 쿠폰과 친구추천 이벤트가 있는 슬롯사이트, 고카지노
고카지노는 강력한 쿠폰과 친구추천 이벤트로 많은 사용자들의 사랑을 받고 있습니다. 이 사이트는 다양한 슬롯 게임을 제공하며, 사용자들이 게임을 즐기면서 추가적인 보상을 받을 수 있도록 다양한 쿠폰을 제공합니다. 친구를 추천하면 추가 보너스를 받을 수 있는 이벤트는 사용자들 사이에서 큰 호응을 얻고 있습니다. 고카지노의 이러한 혜택은 사용자들이 게임을 즐기는 동안 더 많은 기회를 제공하여 만족도를 높입니다.
매니토토 커뮤니티 그들이 자랑하는 슬롯의 메카, 헤븐카지노
헤븐카지노는 매니토토 커뮤니티에서 자랑하는 슬롯의 메카로, 무제한 이벤트와 제한 없는 안전한 슬롯&카지노사이트로 명성을 떨치고 있습니다. 이 사이트는 다양한 슬롯 게임과 함께 사용자들이 안전하게 게임을 즐길 수 있는 환경을 제공합니다. 헤븐카지노의 무제한 이벤트는 사용자들에게 지속적인 흥미를 제공하며, 언제나 새로운 도전을 즐길 수 있게 합니다.
무제한 이벤트와 제한 없는 안전한 슬롯&카지노사이트, 홈카지노
홈카지노는 무제한 이벤트와 제한 없는 안전한 슬롯 및 카지노사이트로서 사용자들에게 많은 혜택을 제공합니다. 이 사이트는 빠르고 안전한 입출금 시스템을 갖추고 있어, 사용자들이 스트레스 없이 게임을 즐길 수 있도록 돕습니다. 특히, 칼 입출금을 자랑하는 홈카지노의 특징은 사용자들이 언제든지 원할 때 쉽게 자금을 관리할 수 있게 합니다. 홈카지노의 이러한 시스템은 많은 사용자들에게 큰 만족을 주고 있습니다.
이처럼 다양한 슬롯사이트와 카지노사이트는 각각의 특징과 혜택을 통해 많은 플레이어들에게 즐거움과 혜택을 제공하고 있습니다. 티파니카지노, 아리아카지노, FM카지노, 고카지노, 헤븐카지노, 홈카지노 등 다양한 사이트들은 각자의 매력을 통해 사용자들의 다양한 요구를 충족시키고 있습니다. 이러한 사이트들의 지속적인 발전과 다양한 이벤트는 사용자들에게 더 많은 기회를 제공하며, 안전하고 즐거운 게임 환경을 조성합니다. | jackpotslot08 | |
1,893,788 | Fast and Slow Pointers, Coding Interview Pattern | Fast and Slow Pointers The Fast and Slow Pointers technique, also known as the Tortoise... | 0 | 2024-06-19T15:47:03 | https://dev.to/harshm03/fast-and-slow-pointers-coding-interview-pattern-m5p | datastructures, algorithms, coding, interview | ## Fast and Slow Pointers
The Fast and Slow Pointers technique, also known as the Tortoise and Hare algorithm, is a powerful method used to solve problems related to cycle detection in linked lists and arrays, as well as finding the middle of a linked list and other similar tasks. It involves two pointers that traverse the data structure at different speeds: the "fast" pointer typically moves two steps at a time, while the "slow" pointer moves one step at a time. This difference in speed allows the algorithm to efficiently detect cycles when the pointers meet and identify the middle element of a list.
### Linked List Cycle
`This question is part of Leetcode problems, question no. 141.`
Here's the Solution class for the "Linked List Cycle" problem in C++:
```cpp
class Solution {
public:
bool hasCycle(ListNode *head) {
if (!head || !head->next) {
return false;
}
ListNode *slow = head;
ListNode *fast = head->next;
while (slow != fast) {
if (!fast || !fast->next) {
return false;
}
slow = slow->next;
fast = fast->next->next;
}
return true;
}
};
```
### Middle of the Linked List
`This question is part of Leetcode problems, question no. 876.`
Here's the Solution class for the "Middle of the Linked List" problem in C++:
```cpp
class Solution {
public:
ListNode* middleNode(ListNode* head) {
ListNode* slow = head;
ListNode* fast = head;
while (fast && fast->next) {
slow = slow->next;
fast = fast->next->next;
}
return slow;
}
};
```
### Find the Duplicate Number
`This question is part of Leetcode problems, question no. 287.`
Here's the Solution class for the "Find the Duplicate Number" problem in C++:
```cpp
class Solution {
public:
int findDuplicate(vector<int>& nums) {
int slow = nums[0];
int fast = nums[0];
// Phase 1: Finding the intersection point of the two runners.
do {
slow = nums[slow];
fast = nums[nums[fast]];
} while (slow != fast);
// Phase 2: Finding the entrance to the cycle.
slow = nums[0];
while (slow != fast) {
slow = nums[slow];
fast = nums[fast];
}
return slow;
}
};
```
### Palindrome Linked List
`This question is part of Leetcode problems, question no. 234.`
Here's the Solution class for the "Palindrome Linked List" problem in C++:
```cpp
class Solution {
public:
bool isPalindrome(ListNode* head) {
if (!head) return true;
// Find the end of the first half and reverse the second half.
ListNode* firstHalfEnd = endOfFirstHalf(head);
ListNode* secondHalfStart = reverseList(firstHalfEnd->next);
// Check whether or not there's a palindrome.
ListNode* p1 = head;
ListNode* p2 = secondHalfStart;
bool result = true;
while (result && p2) {
if (p1->val != p2->val) {
result = false;
}
p1 = p1->next;
p2 = p2->next;
}
// Restore the list and return the result.
firstHalfEnd->next = reverseList(secondHalfStart);
return result;
}
private:
ListNode* endOfFirstHalf(ListNode* head) {
ListNode* fast = head;
ListNode* slow = head;
while (fast->next && fast->next->next) {
fast = fast->next->next;
slow = slow->next;
}
return slow;
}
ListNode* reverseList(ListNode* head) {
ListNode* prev = nullptr;
ListNode* curr = head;
while (curr) {
ListNode* nextTemp = curr->next;
curr->next = prev;
prev = curr;
curr = nextTemp;
}
return prev;
}
};
```
### Linked List Cycle II
`This question is part of Leetcode problems, question no. 142.`
Here's the Solution class for the "Linked List Cycle II" problem in C++:
```cpp
class Solution {
public:
ListNode *detectCycle(ListNode *head) {
if (!head || !head->next) {
return nullptr;
}
ListNode *slow = head;
ListNode *fast = head;
// Detect if there's a cycle
do {
if (!fast || !fast->next) {
return nullptr;
}
slow = slow->next;
fast = fast->next->next;
} while (slow != fast);
// Find the start of the cycle
slow = head;
while (slow != fast) {
slow = slow->next;
fast = fast->next;
}
return slow;
}
};
```
### Reorder List
`This question is part of Leetcode problems, question no. 143.`
Here's the Solution class for the "Reorder List" problem in C++:
```cpp
class Solution {
public:
void reorderList(ListNode* head) {
if (!head || !head->next) return;
// Find the middle of the list
ListNode* slow = head;
ListNode* fast = head;
while (fast && fast->next) {
slow = slow->next;
fast = fast->next->next;
}
// Reverse the second half of the list
ListNode* prev = nullptr;
ListNode* curr = slow;
while (curr) {
ListNode* nextTemp = curr->next;
curr->next = prev;
prev = curr;
curr = nextTemp;
}
// Merge the two halves
ListNode* first = head;
ListNode* second = prev;
while (second->next) {
ListNode* temp1 = first->next;
ListNode* temp2 = second->next;
first->next = second;
second->next = temp1;
first = temp1;
second = temp2;
}
}
};
```
### Length of Linked List Loop
`This question is part of Leetcode problems, question no. 141 (Linked List Cycle).`
Here's the Solution class for finding the length of the linked list loop in C++:
```cpp
class Solution {
public:
int lengthOfCycle(ListNode *head) {
ListNode *slow = head, *fast = head;
while (fast && fast->next) {
slow = slow->next;
fast = fast->next->next;
if (slow == fast) {
return countCycleLength(slow);
}
}
return 0; // No cycle
}
private:
int countCycleLength(ListNode *node) {
ListNode *current = node;
int length = 0;
do {
current = current->next;
length++;
} while (current != node);
return length;
}
};
```
### Sort List
`This question is part of Leetcode problems, question no. 148.`
Here's the Solution class for the "Sort List" problem in C++:
```cpp
class Solution {
public:
ListNode* sortList(ListNode* head) {
if (!head || !head->next) {
return head;
}
// Split the list into two halves
ListNode* mid = getMid(head);
ListNode* left = sortList(head);
ListNode* right = sortList(mid);
// Merge the two sorted halves
return merge(left, right);
}
private:
ListNode* getMid(ListNode* head) {
ListNode* slow = head;
ListNode* fast = head;
ListNode* prev = nullptr;
while (fast && fast->next) {
prev = slow;
slow = slow->next;
fast = fast->next->next;
}
if (prev) {
prev->next = nullptr;
}
return slow;
}
ListNode* merge(ListNode* l1, ListNode* l2) {
ListNode dummy(0);
ListNode* tail = &dummy;
while (l1 && l2) {
if (l1->val < l2->val) {
tail->next = l1;
l1 = l1->next;
} else {
tail->next = l2;
l2 = l2->next;
}
tail = tail->next;
}
tail->next = l1 ? l1 : l2;
return dummy.next;
}
};
```
Practice these questions diligently to enhance your problem-solving skills. Remember, consistent practice is key to mastering these concepts. If you find yourself stuck or in need of further clarification, be sure to check out video references and tutorials to clear up any doubts. | harshm03 |
1,893,794 | 슬롯사이트 | 온라인 카지노는 이제 단순한 오락을 넘어, 다양한 혜택과 안전성을 갖춘 플랫폼으로 발전했습니다. 이러한 트렌드를 주도하는 몇 가지 주요 슬롯사이트와 바카라사이트를... | 0 | 2024-06-19T15:46:23 | https://dev.to/jackpotslot08/seulrossaiteu-2ak5 | 온라인 카지노는 이제 단순한 오락을 넘어, 다양한 혜택과 안전성을 갖춘 플랫폼으로 발전했습니다. 이러한 트렌드를 주도하는 몇 가지 주요 슬롯사이트와 바카라사이트를 소개합니다.
티파니카지노: 다양한 슬롯 이벤트와 쿠폰을 제공하는 메이저 슬롯사이트
티파니카지노는 플레이어들에게 다양한 슬롯 이벤트와 쿠폰을 제공하여 높은 인기를 누리고 있습니다. 이 사이트는 사용자의 즐거움을 극대화하기 위해 지속적으로 이벤트를 업데이트하고, 게임을 플레이할 때마다 쿠폰을 제공하여 추가 혜택을 누릴 수 있게 합니다. 이러한 점에서 티파니카지노는 메이저 슬롯사이트로서의 입지를 확고히 하고 있습니다.
아리아카지노: 아리아카지노 슬롯사이트와 같은 명성을 지닌 슬롯의 메카
아리아카지노는 명성 있는 슬롯사이트로, 다양한 게임과 안전한 환경을 제공합니다. 이 사이트는 풍부한 슬롯 게임 라인업을 갖추고 있으며, 모든 게임이 공정하고 투명하게 운영됩니다. 또한, 플레이어의 안전을 최우선으로 하여 개인 정보 보호와 보안 시스템을 철저히 관리하고 있습니다. 이러한 요소들이 결합되어 아리아카지노는 슬롯의 메카로 자리매김하고 있습니다.
**_[슬롯사이트](https://www.outlookindia.com/plugin-play/slot-site-12-billion-jackpot-winner-recommendation-best-7-slot-sites)_**
FM카지노: 강력한 쿠폰과 친구추천 이벤트가 있는 슬롯사이트
FM카지노는 강력한 쿠폰과 친구추천 이벤트로 유명합니다. 플레이어는 다양한 쿠폰을 통해 게임 자금을 추가로 확보할 수 있으며, 친구를 추천할 때마다 추가 보상을 받을 수 있습니다. 이러한 보너스 시스템은 플레이어의 만족도를 높이고, 더 많은 사람들이 FM카지노를 찾게 만드는 요인입니다.
고카지노 매니토토 커뮤니티: 그들이 자랑하는 슬롯의 메카
고카지노는 매니토토 커뮤니티와 함께 슬롯의 메카로 알려져 있습니다. 이 사이트는 커뮤니티 중심의 플랫폼을 통해 사용자 간의 소통과 정보를 공유할 수 있게 하여 더 나은 게임 환경을 제공합니다. 매니토토 커뮤니티의 활발한 활동은 고카지노의 신뢰성과 인기를 높이는 데 중요한 역할을 합니다.
헤븐카지노: 무제한 이벤트와 제한 없는 안전한 슬롯&카지노사이트
헤븐카지노는 무제한 이벤트와 제한 없는 게임 플레이로 많은 플레이어에게 사랑받고 있습니다. 이 사이트는 다양한 프로모션과 이벤트를 통해 지속적으로 플레이어에게 혜택을 제공하며, 모든 게임이 안전하고 공정하게 운영됨을 보장합니다. 헤븐카지노는 이러한 점에서 안전한 슬롯&카지노사이트로서의 명성을 쌓아가고 있습니다.
홈카지노: 입출금 스트레스 제로! 칼 입출금을 자랑하는 슬롯사이트
홈카지노는 입출금의 편리함을 최우선으로 하는 슬롯사이트입니다. 빠르고 정확한 입출금 서비스는 플레이어에게 큰 장점으로 다가오며, 입출금 과정에서 발생하는 스트레스를 최소화합니다. 또한, 다양한 게임 옵션과 사용자 친화적인 인터페이스를 통해 누구나 쉽게 접근하고 즐길 수 있는 환경을 제공합니다.
결론
이처럼 다양한 온라인 슬롯사이트와 바카라사이트는 플레이어에게 무제한의 재미와 혜택을 제공합니다. 각 사이트는 고유의 장점을 가지고 있으며, 안전하고 신뢰할 수 있는 환경을 제공하여 많은 사용자들의 사랑을 받고 있습니다. 온라인 카지노를 통해 새로운 게임 경험을 원한다면, 이러한 사이트들을 통해 안전하고 흥미로운 게임을 즐겨보시길 바랍니다. | jackpotslot08 | |
1,893,792 | 🚀Unlock the Power of Docker for Your DevOps Workflow!🚀 | What is Docker? Docker is a game-changing lightweight sandbox environment that packages your... | 0 | 2024-06-19T15:44:46 | https://dev.to/emmanuel_oghre_abe292c74f/unlock-the-power-of-docker-for-your-devops-workflow-41go | What is Docker? Docker is a game-changing lightweight sandbox environment that packages your application along with its libraries, runtime, and dependencies. This equips your app with everything it needs to run in isolation, making the deployment process seamless. This revolutionary concept is known as containerization, and Docker is at the forefront of this technology.
While Docker leads the charge, there are other noteworthy containerization technologies such as Podman, Containerd, Nerdctl, LXC, runc, and Red Hat OpenShift.
Why Docker? Have you ever faced the nightmare of an app working flawlessly in the development and test environments but crashing in production? This common issue stems from misconfigurations, misalignments, and functionality problems when moving between different environments. Such discrepancies often lead to conflicts between development teams (who create the app) and operations teams (who manage infrastructure).
Enter Docker — The Ultimate Solution Docker addresses these challenges by allowing you to ship your code to the production environment with all necessary libraries and dependencies. This eliminates misconfigurations, infrastructure misalignments, networking issues, and unhealthy infrastructure, ensuring your app runs smoothly anywhere. Containerization thus empowers your applications to operate in isolated environments with everything they need to succeed.
Streamlining Containerization Tasks Here’s how Docker simplifies your workflow:
Build ➡️ Ship ➡️ Run Application Code
Simple Docker Flow:
Install Docker: Download and install Docker on your local machine from the official Docker website.
Create a Dockerfile: Write a Dockerfile that defines the environment for your application. This typically includes:
A base image (FROM)
Instructions to add the application code (COPY or ADD)
Commands to install dependencies (RUN)
Command to run the application (CMD or ENTRYPOINT)
Build the Docker Image: Use the docker build command to create an image from your Dockerfile.
Push Created Image to Registry: Push your image to a registry like Docker Hub.
Pull Image from Registry: Use the docker pull command to pull the image into your dev, test, and production environments.
Run the Docker Container: Use the docker run command to see if your application is running as expected.
Docker transforms how we develop, test, and deploy applications, making the process efficient, consistent, and error-free. Dive into the world of Docker today and revolutionize your DevOps workflow! 🌟
👉 Video Link: https://lnkd.in/dwvdsaGw
👉 GitHub Link: https://lnkd.in/dRu983VZ
| emmanuel_oghre_abe292c74f | |
1,893,790 | Developer Mental Health Tips | Introduction Starting out as a web developer can be exciting, daunting and exhausting.... | 0 | 2024-06-19T15:39:39 | https://dev.to/jgdevelopments/developer-mental-health-tips-ghp | webdev, mentalhealth, beginners, productivity | ##Introduction
Starting out as a web developer can be exciting, daunting and exhausting. Whether it’s a night of coding into the early hours, or an unexpected bug that takes you back to the drawing board, the mental stimulation involved in your work can be an intense experience. But it needn’t take a toll on your mental wellbeing. In this guide, we explore some ways to retain a lightness of touch, and a sense of humour, navigating the chaos.:heart:
##Strategies for maintaining mental health
Strive for balance. If you’re a seasoned developer, perhaps you can bang out some awesome code for a few straight hours. Give it a shot, but learn to feel when it’s time for a break. The Pomodoro Technique is a great combination of purposeful work (25 minutes of hardcore coding) followed by a short and purposeful break to recharge and refresh your mind (5 minutes). That sounds great, but what if you’re just building your skills or angling to move into development from another department? As you start learning, try to dedicate just a few minutes of daily downtime to coding. And finally, get away from your keyboard. Make sure you’re devoting time to discrete, non-code related activities each week that you can look forward to and contribute towards chipping away at burnout. After all, the best developer in the world probably needs a drum set at home to unwind from looking at screens too!:musical_note:
##Cultivating a healthy mindset
Build yourself a harmony surround-sound system. Get buddy-buddies and buddy-buddy communities. Check out online forums and be present at meetups, so you can have a ‘chit-chat’ with other developers and console yourself with the knowledge that you are not alone in the code world. Rant about your frustrations, and laugh together with fellow-coder buddies as you recount the silly bughunters inhabiting your debugging memories and nightmares.:brain:
##Laughing through the bugs: a guide to staying sane as a web developer
Laughter is your sidekick. The next time a bug makes you go ‘WTF?’ laugh about it. It sounds cliché, but a good hearty laugh relieves stress. Create an AI-bug meme collection, follow funny programming social media accounts (eg, the bingo-card-creator using their platform to spit out programming jokes), or email a colleague about the funniest bugs that happened to you during the week.:laughing:
##Embracing the chaos: a web developer's guide to staying grounded
Learn to love the messiness and the mistakes. Coding is fundamentally iterative, and accepting that and not fighting the trial-and-error nature of it can lead to less stress and, ultimately, more resilience. Focus on the process, not the output, and celebrate each small win along the way. There isn't a single developer who didn't make a ton of mistakes along the way: every mistake is a practice move.:runner:
##Conclusion
Alongside the time pressure of development work, prioritizing and maintaining sound mental hygiene is also about maintaining sanity. Through applying some of these strategies, you can develop your grit outlook, maintain or restore your equanimity, and even develop an amused detachment to invariably hectic situations. Enjoy the ride as much as the destination. Happy coding.:computer: | jgdevelopments |
1,893,779 | 3. Building JavaScript Array Methods from Scratch in 2024 - Easy tutorial for beginners. | Video version's link: https://www.youtube.com/watch?v=cJpmCjRJB3A Continuing our series of building... | 0 | 2024-06-19T15:35:57 | https://dev.to/itric/3-building-javascript-array-methods-from-scratch-in-2024-easy-tutorial-for-beginners-4b45 | javascript, beginners, tutorial, learning | Video version's link: https://www.youtube.com/watch?v=cJpmCjRJB3A
Continuing our series of building javaScript method from Scratch for beginners from javaScript programming basics. In this post we will be making these 2 method as a function:
1. Array.pop()
2. Array.at()
and to make these methods we are allowed to use method that we have already build ,so let’s start.
1. Array.pop():
First is Array.pop() method. The **pop** method of [Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array) instances removes the **last** element from an array and returns that element. This method changes the length of the array.
By examining the example input, output, and the method's definition, to build this method as a function we have to somehow extract array’s last element and return it. And removing the last element means after the pop method is executed array will be missing it’s last position element.
So these are the two things we are focusing on, first extracting last element, extracting element from array requires element’s position index. Now let’s take simplest case possible, array with only one element. We extract last element of that kind of array by taking index as 0 . And for array containing 2 elements, we can extract last element by taking index as 1 and for 3 element containing array the index would be 2.
Now, Can you see the pattern here? To extract the last element of the array, we need an index which is length of an array minus 1.
Now the second constraint. For second constraint which is to remove the last element of an array and adjusting the length of an array. Well, listen me out for this one, what if i say adjusting length of an array which is decreasing the length of a JavaScript array by 1 can automatically remove the last element.
Let me explain: When you decrease the length of a JavaScript array by 1, it effectively removes the last element from the array. This is because the length property of an array in JavaScript is not just a property that you can read, but also a property you can write to. By setting a new length for the array, you can effectively truncate the array, removing elements that are beyond the new length.
When you change the length of the array, JavaScript automatically removes any elements that are beyond the new length. So, if the original array was [1, 2, 3] and you set arr.length = 2, the array becomes [1, 2]. The element 3 is no longer part of the array.
So now the all the missing pieces are here, let make a rough draft of our algorithm which is called pseudocode. First, initialize a function, let’s name it customPop. It’s excepts one argument: an array. Second, Extract last element of an array by assigning it to a variable “lastElement”, a reasonable name. Then decrease the length property of that array by 1. And finally, return variable “lastElement”.
- Initialize a function named customPop, parameter ; arr
- Initialize a variable lastElement
- Assign last element of an array to variable lastElement
- Minus the length property of that array by 1
- return variable lastElement
All done, but one case that we have not take care of is when, given array is empty, meaning array’s length is 0, in that case we have to return undefined.
modifying the algorithm, after initializing the function, check if array’s length is zero, if yes then return undefined.
- Initialize a function named customPop, parameter ; arr
- check if array’s length is zero
- if yes then return undefined
- Initialize a variable lastElement
- Assign last element of an array to variable lastElement
- Minus the length property of that array by 1
- return variable lastElement
Here a flowchart representation of our algorithm:
Now let’s code it up with javaScript:
```jsx
function customPop(arr) {
if (arr.length === 0) {
return undefined; // If the array is empty, return undefined
}
const lastElement = arr[arr.length - 1]; // Get the last element
arr.length = arr.length - 1; // Decrease the length of the array by 1, effectively removing the last element
return lastElement; // Return the removed element
}
const array = [1, 2, 3];
console.log(customPop(array)); // Output: 3
console.log(array); // Output: [1, 2]
console.log(customPop(array)); // Output: 2
console.log(array); // Output: [1]
console.log(customPop(array)); // Output: 1
console.log(array); // Output: []
console.log(customPop(array)); // Output: undefined
```
### Explanation
1. **Check if the Array is Empty**:
- If the array has no elements (`arr.length === 0`), return `undefined`.
2. **Get the Last Element**:
- Store the last element of the array in a variable (`lastElement`).
3. **Remove the Last Element**:
- Decrease the length of the array by 1 (`arr.length = arr.length - 1`). This effectively removes the last element from the array.
4. **Return the Removed Element**:
- Return the stored last element (`lastElement`).
This custom `pop` function works similarly to the built-in `pop` method, adjusting the array's length to remove the last element and returning that element.
**2. Array.at()**
Next one on the line is [array.at](http://array.at/) method. The **at** method of [Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array) instances takes an integer value and returns the item at that index, allowing for positive and negative integers. Negative integers count back from the last item in the array.
Well, if given index is an positive integer and is within the bound of an array then its easy, just access a element and return. Problem arises when given index is not an integer, and if it is, it is not positive integer. Remember we can only access element in array with positive integer value. And another constraint is that index have to be within the bound of an array.
So let’s tackle these constraints one by one, first check if given index is an integer, otherwise return undefined. We can check if given index is an integer by using Number.isInteger method, which is a static method determines whether the passed value is an integer.
Secondly, for negative index passed down to a function, we have to convert it into it’s positive equivalent index. So how would we do it? again, let’s start by taking simplest case possible, array with only one element. In this array, we can only access one element, the 0 index element which corresponding negative index is -1. And how we convert -1 to 0? simple by adding 1. And in array with 2 elements, 0 index corresponding negative index is -2.
Can you see the pattern here? As length of an array increase, 0 index corresponding negative index decreases. So, To get positive index of an element from negative index, just add it with length of an array.
And importantly, we have to convert negative index into positive before this step, as it is easier check this condition with positive index. And if index is not within the bound we will return undefined.
Now let’s write our algorithm of custom at function in simple English sentences: First we initialize a function with two parameters; array and index. Let’s name it customAt. And this time let’s start with checking if given array is of type array, as i have shown you how to do it, quite a few times in this series. And if given array is not of type array then throw an appropriate error.
Secondly, check if given index is an integer, if not then return undefined. Next, check if given index is negative, if yes then add array’s length to it. Next, check if index is within the bound of array, if not then return undefined. And finally, return required element corresponding array’s index.
- Initialize function named customAt, parameters ; array and index
- check if array is of type array
- If not, then throw an appropriate error
- check if given index is an integer
- if not then return undefined
- check if given index is negative
- if yes then add array’s length to it
- check if index is within the bound of array
- if not then return undefined
- return required element corresponding array’s index.
Here a flowchart representation of our algorithm:
Now let’s code it up with javaScript:
```jsx
function customAt(array, index) {
// Check if the input is an array
if (!Array.isArray(array)) {
throw new TypeError('The first argument must be an array');
}
// Check if the index is an integer
if (!Number.isInteger(index)) {
throw new TypeError('The index must be an integer');
}
// Handle negative indices
if (index < 0) {
index += array.length;
}
// Check if the index is within bounds
if (index < 0 || index >= array.length) {
return undefined;
}
return array[index];
}
// Example usage:
const arr = [1, 2, 3, 4, 5];
console.log(customAt(arr, 2)); // Output: 3
console.log(customAt(arr, -1)); // Output: 5
console.log(customAt(arr, -3)); // Output: 3
console.log(customAt(arr, 5)); // Output: undefined
console.log(customAt(arr, -6)); // Output: undefined
console.log(customAt(arr, 2.5)); // Output: Error: The index must be an integer
```
### Explanation:
1. **Input Validation**:
- The function first checks if the input is an array using `Array.isArray()`.
- If the input is not an array, a `TypeError` is thrown.
2. **Integer Check**:
- The function checks if the index is an integer using `Number.isInteger()`.
- If the index is not an integer, a `TypeError` is thrown.
3. **Negative Index Handling**:
- If the index is negative, it is adjusted by adding the array’s length to it (`index += array.length`).
4. **Bounds Checking**:
- The function checks if the adjusted index is within the bounds of the array.
- If the index is out of bounds (either less than 0 or greater than or equal to the array’s length), the function returns `undefined`.
5. **Element Retrieval**:
- If the index is within bounds, the function returns the element at the specified index.
This implementation ensures that the index must be an integer and provides the same functionality as the `Array.prototype.at()` method, allowing for both positive and negative indexing and robust error handling.
**`Thank you for reading, that's all for today.`**
| itric |
1,892,908 | What is Parallel Computing? | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-19T15:34:48 | https://dev.to/codefatale/what-is-parallel-computing-37l4 | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
## Explainer
Parallel computing is when you have multiple processors working together to solve a problem. A real-life example is multiple checkouts in a grocery store.
| codefatale |
1,893,789 | finding your soulmate | Finding your soulmate can feel like searching for a unicorn in a haystack—elusive, mysterious, and... | 0 | 2024-06-19T15:34:47 | https://dev.to/agung_suryansyah_9944ebfb/finding-your-soulmate-3pak | Finding your soulmate can feel like searching for a unicorn in a haystack—elusive, mysterious, and occasionally surrounded by manure. Imagine navigating the dating world: swiping through profiles that promise "great sense of humor" only to find someone who laughs at their own jokes. It's like ordering pizza and ending up with a pineapple surprise—totally unexpected! And let's not forget those blind dates, where you show up hoping for Ryan Reynolds and end up with Danny DeVito's doppelgänger.
But hey, don't lose hope! Somewhere out there is someone who thinks your quirks are cute and your puns are pun-derful. Until then, enjoy the awkward encounters, mismatched outfits, and stories that make great material for future standup gigs. Because in the comedy of love, every bad date is just another punchline waiting to be delivered!
source : www.mediatolis.biz
www.kopiborong.xyz | agung_suryansyah_9944ebfb | |
1,893,146 | Writing code like this improves efficiency by 100 times compared to directly using MyBatis | For a Java backend programmer, MyBatis, Hibernate, Data Jdbc, and others are commonly used ORM... | 27,777 | 2024-06-19T15:34:03 | https://bs.zhxu.cn/ | java, orm, beansearcher | For a Java backend programmer, `MyBatis`, `Hibernate`, `Data Jdbc`, and others are commonly used ORM frameworks. They are sometimes very useful, such as simple CRUD and excellent transaction support. But sometimes it can be very cumbersome to use, such as a common development requirement that we will talk about next. For this type of requirement, this article will provide a method that can improve development efficiency by **at least 100 times** compared to directly using these ORMs (without exaggeration).
## Firstly, the database has two tables
User Table: (For simplicity, assume there are only 4 fields)
Role table: (For simplicity, assume there are only 2 fields)
## Next, we need to implement a user query function
This query is a bit complex, and its requirements are as follows:
* Can be queried by the `username` field, with the following requirements:
* Can be accurately matched (equal to a certain value)
* Fully fuzzy matching (including given values)
* Post fuzzy query (starting with...)
* Pre fuzzy query (ending with...)
* Can you specify whether the above four matches can ignore case
* Can be queried by the `age` field, with the following requirements:
* Can be accurately matched (equal to a certain age)
* Can be greater than matching (greater than a certain value)
* Can be less than matching (less than a certain value)
* Interval matching (within a certain range of intervals)
* Can be queried by `roleId`, with the requirement of precise matching
* Can be queried by 'userId', requirement: same as 'age' field
* You can specify which columns to output only (for example, only query the `id` and `username` columns)
* Support pagination (after each query, the page should display the total number of users who meet the conditions)
* When querying, you can choose to sort by any field such as `id`, `username`, `age`, etc
## How should the backend interface be written?
Imagine, for this type of query, if the code in the backend interface is written directly using `MyBatis`, `Hibernate` or `Data Jdbc`, can it be completed within **100 lines of code** ?
Anyway, I don't have the confidence. Forget it, I'll just be honest. How can I handle this kind of requirement **with just one line of code** on the backend? (Interested students can try MyBatis and compare it in the end)
## Only one line of code is used to implement the above requirements
First of all, the key figure has appeared: **Bean Searcher**, which is a **read-only ORM** that focuses on **advanced queries**. For this type of list retrieval, whether it is simple or complex, it can be done in one line of code! And it is also very lightweight and has no third-party dependencies (can be used in the same project as any other ORM).
Assuming that the framework we are using in our project is Spring Boot (Of course, Bean Searcher does not have any special requirements for web frameworks, but it is more convenient to use in Spring Boot).
### Add Dependency
* Maven:
```xml
<dependency>
<groupId>cn.zhxu</groupId>
<artifactId>bean-searcher-boot-starter</artifactId>
<version>4.3.0</version>
</dependency>
```
* Gradle:
```groovy
implementation 'cn.zhxu:bean-searcher-boot-starter:4.3.0'
```
### Then write an entity class to carry the results of the query
```java
@SearchBean(tables="user u, role r", where="u.role_id = r.id", autoMapTo="u")
public class User {
private Long id; // User ID (u.id)
private String name; // User Name (u.name)
private int age; // Age (u.age)
private int roleId; // Role ID (u.role_id)
@DbField("r.name") // Indicates that this attribute comes from the name field of the role table
private String role; // Role Name (r.name)
// Getter and Setter ...
}
```
> Note: This entity class is mapped to two tables and can be directly returned to the front-end
### Then we can write the user query interface
```java
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private MapSearcher mapSearcher; // injection searcher (provided by bean-searcher-boot-starter)
@GetMapping("/index")
public SearchResult<Map<String, Object>> index(HttpServletRequest request) {
// Here we only write one line of code
return mapSearcher.search(User.class, MapUtils.flat(request.getParameterMap()));
}
}
```
> The `MapUtils` in the above code is a tool provided by Bean Searcher, while `MapUtils.flat(request. getParameterMap())` is only used to collect the request parameters passed from the front-end, and the rest is handed over to the `MapSearcher`.
## Is that all? Let's test this interface and see the effect
### (1) No parameter request
* GET /user/index
* Return result:
```json
{
"dataList": [ // User list, returns page 0 by default, with a default page size of 15 (configurable)
{ "id": 1, "name": "Jack", "age": 25, "roleId": 1, "role": "VIP" },
{ "id": 2, "name": "Tom", "age": 26, "roleId": 1, "role": "VIP" },
...
],
"totalCount": 100 // Total number of users
}
```
### (2) Paging request (page | size)
* GET /user/index? page=2 & size=10
* Return result: The structure is the same as **(1)** (only 10 items per page, with page 2)
> The parameter names `size` and `page` can be customized, with `page` starting from `0` by default. They can also be customized and can be used in combination with other parameters.
### (3) Data sorting (sort | order)
* GET /user/index? sort=age & order=desc
* Return result: The structure is the same as **(1)** (except that the dataList is output in descending order of the age field)
> The parameter names `sort` and `order` are customizable and can be used in combination with other parameters.
### (4) Specify (exclude) fields (onlySelect | selectExclude)
* GET /user/index? onlySelect=id,name,role
* GET /user/index? selectExclude=age,roleId
* Return result: (The list only contains three fields: `id`, `name`, and `role`)
```json
{
"dataList": [ // User list, returns page 0 by default (only containing id, name, role fields)
{ "id": 1, "name": "Jack", "role": "VIP" },
{ "id": 2, "name": "Tom", "role": "VIP" },
...
],
"totalCount": 100 // Total number of users
}
```
> The parameter names `onlySelect` and `selectExclude` are customizable and can be used in combination with other parameters.
### (5) Field filtering (op = eq)
* GET /user/index? age=20
* GET /user/index? age=20 & age-op=eq
* GET /user/index? age-eq=20 `Simplified writing, reference: https://bs.zhxu.cn/guide/advance/filter.html#suffixopparamfilter`
* Return result: The structure is the same as **(1)** (but only returns data with age=20)
> The parameter `age-op=eq` represents the **field operator** of `age`, which is `eq`(abbreviation for `Equal`), indicating that the relationship between parameter `age` and parameter value `20` is `Equal`. Since `Equal` is a default relationship, `age-op=eq` can also be omitted.
> The suffix `-op` for the parameter name `age-op` is customizable and can be used in combination with other field parameters and the parameters listed above (pagination, sorting, specified fields). The same applies to the field parameters listed below and will not be repeated.
### (6) Field filtering (op = ne)
* GET /user/index? age=20 & age-op=ne
* GET /user/index? age-ne=20 `Simplified version, reference: https://bs.zhxu.cn/guide/advance/filter.html#suffixopparamfilter`
* Return result: The structure is the same as **(1)** (but only returns data with age != 20, where `ne` is an abbreviation for `NotEqual`).
### (7) Field filtering (op = ge)
* GET /user/index? age=20 & age-op=ge
* GET /user/index? age-ge=20 `Simplified version, reference: https://bs.zhxu.cn/guide/advance/filter.html#suffixopparamfilter`
* Return result: The structure is the same as **(1)** (but only returns data with age >= 20, where `ge` is the abbreviation of `GreateEqual`)
### (8) Field filtering (op = le)
* GET /user/index? age=20 & age-op=le
* GET /user/index? age-le=20 `Simplified version, reference: https://bs.zhxu.cn/guide/advance/filter.html#suffixopparamfilter`
* Return result: The structure is the same as **(1)** (but only returns data with age <= 20, where `le` is the abbreviation of `LessEqual`)
### (9) Field filtering (op = gt)
* GET /user/index? age=20 & age-op=gt
* GET /user/index? age-gt=20 `Simplified version, reference: https://bs.zhxu.cn/guide/advance/filter.html#suffixopparamfilter`
* Return result: The structure is the same as **(1)** (but only returns data with age > 20, where `gt` is the abbreviation of`GreateThan`)
### (10) Field filtering (op = lt)
* GET /user/index? age=20 & age-op=lt
* GET /user/index? age-lt=20 `Simplified version, reference: https://bs.zhxu.cn/guide/advance/filter.html#suffixopparamfilter`
* Return result: The structure is the same as **(1)** (but only returns data with age < 20, where `lt` is the abbreviation of`LessThan`)
### (11) Field filtering (op = bt)
* GET /user/index? age-0=20 & age-1=30 & age-op=bt
* GET /user/index? age=\[20,30] & age-op=bt (**Simplified version**，\[20,30] requires UrlEncode, refer to the following text)
* GET /user/index? age-bt=\[20,30] `Simplify again, refer to：https://bs.zhxu.cn/guide/advance/filter.html#suffixopparamfilter`
* Return result: The structure is the same as **(1)** (but only returns data with 20 <= age <= 30, where `bt` is the abbreviation of `Between`)
> The parameter `age-0 = 20` indicates that the 0th parameter value of `age` is `20`. The above-mentioned `age=20` is actually a shortened form of `age-0=20`. Additionally, the hyphen `-` in the parameter names `age-0` and `age-1` can be customized.
### (12) Field filtering (op = il)
* GET /user/index? age-0=20 & age-1=30 & age-2=40 & age-op=il
* GET /user/index? age=\[20,30,40] & age-op=il (**Simplified version**，\[20,30,40] requires UrlEncode, refer to the following text)
* GET /user/index? age-il=\[20,30,40] `Simplify again, refer to：https://bs.zhxu.cn/guide/advance/filter.html#suffixopparamfilter`
* Return result: The structure is the same as **(1)** (but only returns data with age in (20, 30, 40), where `il` is the abbreviation of `InList`)
### (13) Field filtering (op = ct)
* GET /user/index? name=Jack & name-op=ct
* GET /user/index? name-ct=Jack `Simplified version, reference: https://bs.zhxu.cn/guide/advance/filter.html#suffixopparamfilter`
* Return result: The structure is the same as **(1)** (but only returns data with name contains Jack, where `ct` is the abbreviation of `Contain`)
### (14) Field filtering (op = sw)
* GET /user/index? name=Jack & name-op=sw
* GET /user/index? name-sw=Jack `Simplified version, reference: https://bs.zhxu.cn/guide/advance/filter.html#suffixopparamfilter`
* Return result: The structure is the same as **(1)** (but only returns data with name staring with 'Jack', where `sw` is the abbreviation of `StartWith`)
### (15) Field filtering (op = ew)
* GET /user/index? name=Jack & name-op=ew
* GET /user/index? name-ew=Jack `Simplified version, reference: https://bs.zhxu.cn/guide/advance/filter.html#suffixopparamfilter`
* Return result: The structure is the same as **(1)** (but only returns data with name ending with 'Jack', where `ew` is the abbreviation of `EndWith`)
### (16) Ignoring case (ic = true)
* GET /user/index? name=Jack & name-ic=true
* Return result: The structure is the same as **(1)** (but only returns data with name equal with `Jack`(ignore case), where `ic` is the abbreviation of `IgnoreCase`)
>The suffix `-ic` in the parameter name `name-ic` is customizable and can be used in combination with other parameters. For example, when retrieving a name equal to `Jack`, case is ignored, but it is also applicable when retrieving a name starting or ending with `Jack`, case is ignored.
More search methods are also supported, and we will not provide examples here. To learn more, please refer: https://bs.zhxu.cn/guide/param/field.html#%E5%AD%97%E6%AE%B5%E8%BF%90%E7%AE%97%E7%AC%A6
### Of course, all of the above conditions can be combined.
Such as: Query `name` starting with 'Jack' (ignoring case), `roleId=1`, results sorted by `id` field, loading 10 entries per page, query page 2:
* GET /user/index? name=Jack & name-op=sw & name-ic=true & roleId=1 & sort=id & size=10 & page=2
* Return result: The structure is the same as **(1)**
> In fact, Bean Searcher also supports more search methods (even customizable), so we won't list them all here.
OK， After seeing the effect, we have only written one line of code in the `GET /user/index` interface, which can support so many retrieval methods. Do you think that now **you can write a single line of code** can be equivalent to **someone else's 100 lines**?
## Bean Searcher
In this example, we only used one retrieval method from the `MapSearcher` retriever provided by Bean Searcher, which actually has many other retrieval methods.
### Retrieval methods
* `searchCount(Class<T> beanClass, Map<String, Object> params)` Query the **total number** of data under specified conditions
* `searchSum(Class<T> beanClass, Map<String, Object> params, String field)` Query the **statistical value** of **a certain field** under specified conditions
* `searchSum(Class<T> beanClass, Map<String, Object> params, String[] fields)` Query the **statistical values** of **multiple fields** under specified conditions
* `search(Class<T> beanClass, Map<String, Object> params)` **Paging** query **List** data and **Total number of entries** under specified conditions
* `search(Class<T> beanClass, Map<String, Object> params, String[] summaryFields)` **Same as above** + multi field **statistics**
* `searchFirst(Class<T> beanClass, Map<String, Object> params)` Query the **first** data under specified conditions
* `searchList(Class<T> beanClass, Map<String, Object> params)` **Paging** Query **List** data under specified conditions
* `searchAll(Class<T> beanClass, Map<String, Object> params)` Query a list of **all data** under specified conditions
### MapSearcher and BeanSearcher
In addition, Bean Searcher provides not only a 'MapSearcher' retriever, but also a 'BeanSearcher' retriever, which also has all the methods of 'MapSearcher'. However, the single data it returns is not a 'Map', but a **generic** object.
### Parameter construction tool
Additionally, if you are using Bean Searcher in a Service, using parameters of type `Map<String, Object>` directly may not be elegant. Therefore, Bean Searcher specifically provides a parameter construction tool.
For example, if the query `name` starts with 'Jack' (ignoring case) and `roleId=1`, and the result is sorted by the `id` field, load `10` entries per page, load page `2`, and use a parameter builder, the code can be written as follows:
```java
Map<String, Object> params = MapUtils.builder()
.field(User::getName, "Jack").op(Operator.StartWith).ic()
.field(User::getRoleId, 1)
.orderBy(User::getId).asc()
.page(2, 10)
.build()
List<User> users = beanSearcher.searchList(User.class, params);
```
> The `BeanSearcher` retriever and its' `searchList (Class<T> beanClass, Map<String, Object> params)` method are used here.
### Operator constraints
As we saw earlier, Bean Searcher directly supports many retrieval methods for each field in the entity class.
But a classmate: Oh my! There are too many search methods, I don't need so many at all. **My data volume is billions, and the fuzzy query method before the username field cannot utilize the index. What if my database crashes**?
**Easy to handle**, Bean Searcher supports operator constraints, and the `name` field of the entity class only needs to be annotated:
```java
@SearchBean(tables="user u, role r", where="u.role_id = r.id", autoMapTo="u")
public class User {
@DbField(onlyOn = {Equal.class, StartWith.class})
private String name;
// ...
}
```
By using the `onlyOn` attribute of `@DbField`, it is specified that the `name` field can only be used for `Equal` and `StartWith` operators, and other operators will be ignored directly.
The above code restricts `name` to only two operators. If it is stricter and only allows precise matching, there are actually two ways to write it.
##### (1) use operator constraints:
```java
@SearchBean(tables="user u, role r", where="u.role_id = r.id", autoMapTo="u")
public class User {
@DbField(onlyOn = Equal.class)
private String name;
// ...
}
```
##### (2) Overwrite operator parameters in the method of Controller:
```java
@GetMapping("/index")
public SearchResult<Map<String, Object>> index(HttpServletRequest request) {
Map<String, Object> params = MapUtils.flatBuilder(request.getParameterMap())
.field(User::getName).op(Operator.Equal) // Overwrite the operator of the name field directly to Equal
.build()
return mapSearcher.search(User.class, params);
}
```
### Conditional constraints
The student said also: Oh my! **My data volume is still very large, and the age field has no index. I don't want it to participate in the where condition, otherwise it is likely to cause slow SQLs**!
**Don't worry**, Bean Searcher also supports conditional constraints, making this field directly unavailable as a condition:
```java
@SearchBean(tables="user u, role r", where="u.role_id = r.id", autoMapTo="u")
public class User {
@DbField(conditional = false)
private int age;
// ...
}
```
By using the `conditional` attribute of `@DbField`, the `age` field is directly not allowed to participate in the condition. No matter how the frontend passes the parameter, the Bean Searcher always ignores it.
### Parameter filter
The student still said: Oh my! Oh my...
**Don't be afraid** Bean Searcher also supports configuring global parameter filters and can customize any parameter filtering rules. In the SpringBoot project, only one bean needs to be declared:
```java
@Bean
public ParamFilter myParamFilter() {
return new ParamFilter() {
@Override
public <T> Map<String, Object> doFilter(BeanMeta<T> beanMeta, Map<String, Object> paraMap) {
// beanMeta is the meta information of the entity class being retrieved, and paraMap is the current retrieval parameters
// TODO: Here you can write some custom parameter filtering rules
return paraMap; // Returns the filtered search parameters
}
};
}
```
## Another classmate asked
### Why are the parameters so strange? With so many parameters, is there any grudge against the front-end?
1. Whether the parameter name is strange or not depends on personal preference. If you don't like the hyphen `-`, the suffix `op`, or `ic`, you can completely customize it. Please refer to this document: https://bs.zhxu.cn/guide/param/field.html
2. The number of parameters is actually related to the complexity of the product requirements. If the requirements are very simple, then many parameters do not need to be sent from the front-end, and the back-end can simply plug them in. For example, if `name` only requires post fuzzy matching and `age` only requires interval matching, then it can:
```java
@GetMapping("/index")
public SearchResult<Map<String, Object>> index(HttpServletRequest request) {
Map<String, Object> params = MapUtils.flatBuilder(request.getParameterMap())
.field(User::getName).op(Operator.StartWith)
.field(User::getAge).op(Operator.Between)
.build()
return mapSearcher.search(User.class, params);
}
```
This way, the front-end does not need to sent the `name-op` and `age-op` parameters.
There is actually a simpler method, which is the **operator constraint** (when the constraint exists, the operator defaults to the first value specified in the `onlyOn` attribute, which can be omitted from the frontend):
```java
@SearchBean(tables="user u, role r", where="u.role_id = r.id", autoMapTo="u")
public class User {
@DbField(onlyOn = Operator.StartWith)
private String name;
@DbField(onlyOn = Operator.Between)
private String age;
// ...
}
```
3. For multi valued parameter passing with **op=bt/il**, parameters can indeed be simplified, for example:
* Simplify `age-0=20 & age-1=30 & age-op=bt` to `age=[20,30] & age-op=bt` and further simplify it to `age-bt=[20,30]`;
* Simplify `age-0=20 & age-1=30 & age-2=40 & age-op=il` to `age=[20,30,40] & age-op=il` and further simplify it to `age-il=[20,30,40]`.
Simplification method: Just enable one configuration, please refer here:
* https://bs.zhxu.cn/guide/advance/filter.html#jsonarrayparamfilter
### The input parameter is a request, but the Swagger document is not easy to render
In fact, the retriever of Bean Searcher only requires a parameter of type `Map<String, Object>`, and how this parameter is obtained is not directly related to Bean Searcher. The reason why I use `request` is because it makes the code look concise. If you like to declare parameters, you can write the code as follows:
```java
@GetMapping("/index")
public SearchResult<Map<String, Object>> index(Integer page, Integer size,
String sort, String order, String name, Integer roleId,
@RequestParam(value = "name-op", required = false) String name_op,
@RequestParam(value = "name-ic", required = false) Boolean name_ic,
@RequestParam(value = "age-0", required = false) Integer age_0,
@RequestParam(value = "age-1", required = false) Integer age_1,
@RequestParam(value = "age-op", required = false) String age_op) {
Map<String, Object> params = MapUtils.builder()
.field(Employee::getName, name).op(name_op).ic(name_ic)
.field(Employee::getAge, age_0, age_1).op(age_op)
.field(Employee::getRoleId, roleId)
.orderBy(sort, order)
.page(page, size)
.build();
return mapSearcher.search(User.class, params);
}
```
### The relationship between field parameters is "and", what about "or"? And any combination of "or" and "and"?
As for "or", although there are not many usage scenarios, Bean Searcher still supports it (and it is very **convenient** and **powerful**). For more details, please refer:
* https://bs.zhxu.cn/guide/param/group.html
I won't repeat it here.
### Are the values of parameters such as `sort` and `onlySelect` in the previous text the field names of the data table, and is there a risk of SQL injection?
You can completely be at ease on it. SQL injection, such a low-level error, was already avoided at the beginning of framework design. The values of parameters such as `sort` and `onlySelect` are all attribute names of the **entity class** (rather than fields in the data table). When the user passes a value that is not a certain attribute name, the framework will automatically ignore them, and there is no injection problem.
Not only that, Bean Searcher also comes with **pagination protection** function to ensure the security of your service, which can effectively block malicious large page requests from clients.
### Has development efficiency really increased by 100 times?
From this example, it can be seen that the degree of efficiency improvement depends on the complexity of the retrieval requirements. **The more complex the demand, the higher the efficiency improvement**. Conversely, the lower the efficiency improvement. If the demand is super complex, it is possible to increase it by **1000** times.
But even if we don't have such complex requirements in our daily development, and the development efficiency only improves by **3 to 5** times, is that still very impressive?
## Conclusion
This article introduces the powerful capabilities of **Bean Searcher** in the field of complex list retrieval. The reason why it can greatly improve the development efficiency of such requirements is fundamentally attributed to its **original dynamic field operator** and **multi table mapping mechanism**, which is not available in traditional ORM frameworks. However, due to space limitations, its characteristics cannot be fully described in this article, for example, it also:
* Support **aggregation queries**
* Support **Select|Where|From sub queries**
* Support **entity class embedding parameters**
* Support **parameter grouping and logic optimization**
* Support **Field Converter**
* Support **Sql interceptor**
* Support **Database Dialect extension**
* Support **multiple datasources**
* Support **custom operators**
* Support **custom annotations**
* And so on..
To learn more, pleast star it on **[Github](https://github.com/troyzhxu/bean-searcher)** and **[Gitee](https://gitee.com/troyzhxu/bean-searcher)**.
Detailed documentation: <https://bs.zhxu.cn> | troyzhxu |
1,893,781 | Starting with C++: The Classic 'Hello, World!' Guide | Hello fellas, I am an undergrad from Bhubaneswar, India. In the first semester, we had Programming... | 27,776 | 2024-06-19T15:30:00 | https://dev.to/komsenapati/starting-with-c-the-classic-hello-world-guide-235p | cpp, coding, helloworld, learning | _Hello fellas, I am an undergrad from Bhubaneswar, India. In the first semester, we had Programming with C and data structures. Now two semesters are over, so I thought why not try to learn and create a series on learning cpp_
So let's dive into the world of C++
Wait one more thing, I will use [Programiz](https://www.programiz.com/cpp-programming/online-compiler/) for the coding for this blog series. So if you wanna test code or do online C++ coding you can try this compiler. I'M NOT PROMOTING IT. Its UI just looks nice to me.
# First Program
Here is the first program we all do as a beginner
```cpp
#include <iostream>
int main() {
std::cout << "Hello, World!";
return 0;
}
```
So here it prints "Hello, World!" to the console.
The entry point to any cpp program in the main() function. In some IDE's it may not return 0.
The input and output can be done via cout and cin defined in <iostream> header file, so we include that in our program.
And then the line `std::cout << "Hello, World!";` is responsible for printing Hello, World! to the console.
In this line, lots of things are used let's investigate 🔍
- `std` - This is the standard namespace where cout, cin and many functions are defined.
- `::` - This is the scope resolution operator used to specify the namespace of class/object/function.
- `cout` - This is an object of class ostream in <ostream> header file which is included in <iostream> header file which is included in our program
- `<<`- This is a stream insertion operator used to send data to the output stream
- `"Hello, World!"` - This is just a string - plain text inside ""
- `;` - This is ~~stupid~~ semicolon used to terminate every statement in cpp
I guess it's a lot to take in but relax, after some blogs you will be able to understand all of this.
# Second Program
And let's do another program to take username from user and greet user.
```cpp
#include <iostream>
#include <string>
int main() {
std::string username;
std::cout << "Enter your username > ";
std::cin >> username;
std::cout << "Hello, " << username << "!";
return 0;
}
```
Here we are
- declaring a string variable `username`
- Asking the user to input his username via `cout`
- Then storing the user input to our variable `username`
- And then we are printing the username.
## Note
1. We have to include <string> header file to use string data type. We will learn about this later but just note.
2. We can print multiple expressions by appending `<<` operator followed by a string.
And if you find `std::` is hard to include in everywhere and irritating to the eyes you can mention `using namespace std;` under the include statements and skip that.
For example, `std::cout` can be replaced by `cout`.
So that's it for the introduction, see ya all in the next blog.
Bye! Bye!
| komsenapati |
1,893,787 | Very simple stock analysis app | Build it yourself, just clone my gitHub repository. The app extracts stock consensus target price,... | 0 | 2024-06-19T15:29:17 | https://dev.to/sanji_vals/very-simple-stock-analysis-app-37ed | webdev, javascript, stockmarket, github | Build it yourself, just clone my gitHub repository. The app extracts stock **[consensus target price](https://github.com/SanjiS86/stockMarketApp)**, EPS data and social sentiment to forecast the strength of the stock trend.
| sanji_vals |
1,893,786 | Download BABY Audio Transit | Unlock the full potential of your music production with BABY Audio Transit, an innovative plugin... | 0 | 2024-06-19T15:27:40 | https://dev.to/extra_plugins01_57f257bf4/download-baby-audio-transit-25em | sounddesign, musicproduction, audioplugin, babyaudiotransit |
Unlock the full potential of your music production with BABY Audio Transit, an innovative plugin designed to elevate your soundscapes to unprecedented heights. This cutting-edge tool is the perfect addition to any music producer’s arsenal, offering a blend of simplicity, versatility, and powerful features that cater to both beginners and professionals. Discover the transformative power of BABY Audio Transit and take your audio creations to the next level.
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One of the standout features of BABY Audio Transit is its user-friendly design. The interface is meticulously crafted to offer a balance between functionality and simplicity, allowing producers to focus on their creative process rather than getting bogged down by complex controls. With its clear layout and intuitive controls, Transit enables users to quickly apply and customize effects, making it an ideal choice for fast-paced production environments.
Versatile Effects Suite
BABY Audio Transit comes equipped with a comprehensive suite of effects designed to enhance your audio transitions. From reverb and delay to modulation and filter sweeps, the plugin offers a wide range of effects that can be easily tailored to fit your specific needs. Each effect is meticulously modeled to provide high-quality sound, ensuring that your transitions sound professional and polished.
Advanced Automation Capabilities
Automation is a key component of modern music production, and BABY Audio Transit excels in this area. The plugin offers advanced automation capabilities that allow you to fine-tune every aspect of your transitions. Whether you’re adjusting the intensity of a reverb tail or modulating a filter cutoff, Transit provides precise control over your sound, enabling you to create intricate and dynamic transitions with ease.
Seamless Integration with Your DAW
BABY Audio Transit is designed to integrate seamlessly with all major digital audio workstations (DAWs). Whether you're using Ableton Live, FL Studio, Logic Pro, or any other DAW, Transit fits effortlessly into your workflow. Its compatibility with both Mac and Windows ensures that you can take advantage of its powerful features regardless of your preferred operating system.
Elevate Your Sound Design
Sound design is an essential aspect of music production, and BABY Audio Transit offers a wealth of features to help you achieve professional-quality results. The plugin’s versatile effects and powerful automation tools allow you to experiment with different sounds and textures, helping you to craft unique and engaging audio experiences. Whether you're designing soundscapes for a film or producing the next big hit, Transit gives you the tools you need to push the boundaries of your creativity.
A Community of Innovators
By choosing BABY Audio Transit, you’re joining a community of forward-thinking music producers and sound designers. BABY Audio is renowned for its innovative products and commitment to quality, and Transit is no exception. The company’s dedication to providing top-tier audio tools ensures that you’ll always have access to the latest advancements in music production technology.
Why Choose BABY Audio Transit?
Innovative Features: BABY Audio Transit offers a range of cutting-edge features designed to enhance your music production workflow.
User-Friendly Interface: The intuitive design ensures that you can quickly and easily apply effects and create dynamic transitions.
High-Quality Effects: The plugin’s versatile effects suite delivers professional-grade sound quality.
Advanced Automation: Fine-tune every aspect of your transitions with precise automation capabilities.
Seamless DAW Integration: Compatible with all major DAWs, Transit fits effortlessly into your production setup.
Creative Freedom: Unlock new levels of creativity with powerful sound design tools.
Conclusion
In the ever-evolving world of music production, staying ahead of the curve requires the right tools. BABY Audio Transit is a game-changer, offering a combination of innovative features, ease of use, and high-quality sound that is unmatched in the market. Whether you're a seasoned professional or just starting out, Transit provides the tools you need to create captivating and dynamic audio transitions.
Don’t miss out on the opportunity to revolutionize your soundscapes. Download BABY Audio Transit today and experience the future of audio transitions.
Download [BABY Audio Transit](https://extraplugins.com/product/baby-audio-transit/?v=87a47565be47)
#BABYAudioTransit #AudioPlugin #MusicProduction #SoundDesign #AudioEffects #DAW #SeamlessTransitions #MusicProducer #SoundEngineer #CreativeTools #InnovativeAudio #Reverb #Delay #Modulation #FilterSweeps #AudioAutomation #ProfessionalSound #MusicTech #HighQualityAudio #Soundscape | extra_plugins01_57f257bf4 |
1,893,785 | CoinMarketCap Launches Exciting New Project | New Project by CoinMarketCap Launching Today Be part of the exciting new launch by CoinMarketCap.... | 0 | 2024-06-19T15:27:05 | https://dev.to/coin_market_cap/coinmarketcap-launches-exciting-new-project-1clo | 
**New Project by CoinMarketCap Launching Today**
Be part of the exciting new launch by CoinMarketCap. Invest early, secure your tokens, and maximize your potential returns in the rapidly evolving crypto market.
Visit Presale: https://cmctoken.net/
Project Roadmap
2024
Conceptualization and Market Research
Conduct comprehensive market research to conceptualize the CoinMarketCap Token.
Develop a detailed whitepaper outlining the tokenomics and technical architecture.
Team and Partnerships
Assemble a core team and advisory board.
Establish partnerships with exchanges and wallet providers.
Development and Community Building
Develop the smart contract on a scalable blockchain.
Initiate community building through social media and forums.
Funding and Security
Conduct private and pre-sale funding rounds.
Perform security audits and launch a beta test of the token.
2025
Public Sale and Listings
Execute the public sale of the CoinMarketCap Token.
List the token on major cryptocurrency exchanges.
Ecosystem and Growth
Launch the CoinMarketCap ecosystem platform, featuring staking and rewards.
Expand the team to support growth.
Form strategic partnerships to enhance the ecosystem.
Governance and Accessibility
Implement token governance features.
Release a mobile app for platform access.
Scalability and Marketing
Scale infrastructure to accommodate higher transaction volumes and users.
Initiate a global marketing campaign.
Innovation and Competitiveness
Incorporate new blockchain features to maintain a competitive edge.
Presale Link: https://cmctoken.net/ | coin_market_cap | |
1,893,784 | Understanding the P-Test: A Beginner's Guide to Hypothesis Testing 🐍🅿️ | A p-test, or p-value test, is a statistical method used to determine the significance of your results... | 0 | 2024-06-19T15:27:01 | https://dev.to/kammarianand/understanding-the-p-test-a-beginners-guide-to-hypothesis-testing-c8h | statistics, analytics, datascience, machinelearning | A p-test, or p-value test, is a statistical method used to determine the significance of your results in a hypothesis test. It helps you decide whether to reject the null hypothesis, which is a default assumption that there is no effect or no difference.
**Key Concepts**
1. Null Hypothesis (H₀): The assumption that there is no effect or no difference.
2. Alternative Hypothesis (H₁): The assumption that there is an effect or a difference.
3. P-value: The probability of observing the data, or something more extreme, assuming the null hypothesis is true. A small p-value (typically ≤ 0.05) indicates strong evidence against the null hypothesis, so you reject the null hypothesis.
**Example**
Let's consider an example where we want to test whether a coin is fair. We flip the coin 100 times and observe that it lands on heads 60 times.
- Null Hypothesis (H₀): The coin is fair (the probability of heads is 0.5).
- Alternative Hypothesis (H₁): The coin is not fair (the probability of heads is not 0.5).
We can perform a binomial test to determine the p-value.
**Python Code Example**
Here is how you can perform this test in Python using the scipy.stats library.
```python
import scipy.stats as stats
# Number of coin flips
n = 100
# Number of heads observed
k = 60
# Probability of heads under the null hypothesis
p = 0.5
# Perform the binomial test
p_value = stats.binom_test(k, n, p, alternative='two-sided')
print(f"P-value: {p_value}")
# Interpret the result
alpha = 0.05
if p_value < alpha:
print("Reject the null hypothesis. The coin is not fair.")
else:
print("Fail to reject the null hypothesis. The coin is fair.")
```
**output**
```python
P-value: 0.018856
Reject the null hypothesis. The coin is not fair.
```
**Explanation of the Code**
`stats.binom_test(k, n, p, alternative='two-sided'):` This function performs the binomial test.
- k is the number of successes (heads) observed.
- n is the number of trials (coin flips).
- p is the probability of success under the null hypothesis (0.5 for a fair coin).
- alternative='two-sided' specifies that we are testing for deviation in both directions (the coin could be biased towards heads or tails).
**P-value interpretation:**
- If the p-value is less than 0.05, we reject the null hypothesis and conclude that the coin is not fair.
- If the p-value is greater than or equal to 0.05, we fail to reject the null hypothesis and conclude that there is not enough evidence to say the coin is not fair.
**Common Statistical Tests**
| **Test** | **Definition** |
|----------------------------|--------------------------------------------------------------------------------------------------|
| **t-Test** | Compares the means of two groups to determine if they are significantly different from each other.|
| **Chi-Square Test** | Tests the relationship between categorical variables to determine if they are independent. |
| **ANOVA (Analysis of Variance)** | Compares the means of three or more groups to determine if at least one is significantly different. |
| **Mann-Whitney U Test** | A non-parametric test that compares differences between two independent groups. |
| **Wilcoxon Signed-Rank Test** | A non-parametric test that compares paired samples to assess differences. |
| **Fisher's Exact Test** | Used for small sample sizes to test nonrandom associations between two categorical variables. |
**Conclusion About the P-Test**
The p-test, or p-value test, is a fundamental tool in statistical hypothesis testing. It provides a measure of the strength of the evidence against the null hypothesis. By calculating the p-value, researchers can determine whether their observed data is statistically significant or likely due to random chance. A low p-value (typically ≤ 0.05) indicates strong evidence against the null hypothesis, leading to its rejection, while a high p-value suggests insufficient evidence to reject the null hypothesis. Understanding and correctly interpreting p-values are essential for making informed conclusions in scientific research.
---
About Me:
🖇️<a href="https://www.linkedin.com/in/kammari-anand-504512230/">LinkedIn</a>
🧑💻<a href="https://www.github.com/kammarianand">GitHub</a>
| kammarianand |
1,893,783 | PC Building Blog/Guide | Building your own PC can be a highly rewarding experience. Exciting to build and game on your new... | 0 | 2024-06-19T15:26:53 | https://dev.to/jcsaar/pc-building-blogguide-bn7 | pc | Building your own PC can be a highly rewarding experience. Exciting to build and game on your new rig, yet terrifying to make a misstep and waste hundreds of dollars. Not only do you get a machine tailored to your exact needs in PC building, but you also gain a deeper understanding of how computers work. Whether you’re a gamer, a creative professional, or someone looking to learn more about technology, this guide will walk you through the entire process, step by step.
---
## **Why Build Your Own PC?**
- Customization: Choose the exact components that meet your performance needs and budget. Want a budget build to only watch movies and play games on emulators? Cheap builds like that are all over the market. Want to dump your life savings on the most expensive rig and run all your games in 4k max settings while simultaneously editing a video? There's also a build like that.
- Cost-Efficiency: Save money by only paying for the features you need, for example, online features in video games, removing bloatware, etc.
- Upgradability: Easily upgrade individual components in the future. CPU and Motherboard outdated while the rest of the components are still relatively new? You can easily get both of the components online without upgrading the entire computer.
- Satisfaction: Gain a sense of accomplishment and deeper understanding of your machine. Such as how every component in the machine has its own unique role which eventually works with each other to allow the machine to operate and function well.
---
**First Steps**
Planning Your Build
Before you start, it’s crucial to plan your build. Firstly, search up price lists of the components in your local computer stores or online, search up what each component does and watch YouTube videos to get a better understanding. Ask experienced friends or Internet forums about things you aren't sure about. Check whether the components you have selected are compatible. (Some Motherboards only support AMD and not Intel, for example) Most importantly, understand your own needs: What are you using this PC for? What is your budget? Planning your build is definitely one of the most important steps in building your first computer, this ensures you have a good building experience and allows the building stage to flow smoothly.
---
**Components You'll Need:**
Case/Chassis: The enclosure that holds all your components, think of it as the skin or skeleton of your PC, it helps hold everything in place and provides structure. It can also help protect the internal components from physical damage and dust, as well as giving an aesthetically pleasing appearance. Types of cases:
Motherboard: The main circuit board that connects all components. Think of it as the nervous system that connects all components into one central hub, it manages the flow of data and ensures all components function well together.
- ENSURE your Motherboard supports the CPU you are purchasing. Some motherboards only support AMD chips and some motherboards only support INTEL chips.
CPU (Central Processing Unit): I'm sure you have at least heard of CPU once in your life before. It has been frequently, if not, I dare say always dubbed as the Brain of the computer. It processes all the information in the computer and controls all the functions in the system. It is critical to not cheap out on the CPU and make sure you do not have bottlenecks with the GPU or the rest of the components.
- Two key manufacturers of CPU chips. AMD or Ryzen and Intel. Both are exceptionally well-made chips, though Ryzen chips are usually cheaper than Intel and hence more attractive to some gamers who are more interested in spending more on the GPU. Nevertheless, check what each brand of CPU offers and choose the chip accordingly, making sure it's compatible with your Motherboard.
Intel:
AMD:
GPU (Graphics Processing Unit): The GPU accelerates the rendering of graphics in a computer. GPU can technically be seen as an extremely limited computer as it has its own VRAM, basically it's just the dedicated RAM used by graphic cards to store pixels and graphical data. A GPU is more important in a gaming, editing, or 3D modeling rig than it is on a work/office PC.
- Two key manufacturers of GPUs. AMD or Ryzen and Nvidia. Though Intel has started making GPUs as well. Generally, brands of GPUs (Zotac, ASUS) do not really matter in terms of performance, but different brands have different warranties, customer support, and reliability so pick whichever brand you prefer.
- In work/office PCs, there would still be a "GPU" to ensure the PC can produce a display. However, they are called Integrated-Graphics (iGPU) which are merged into the CPU. You would probably think: "Wow! Isn't that a great deal? 2 cards for the price of one?" Unfortunately, as stated before GPU's are DEDICATED cards which display video. Hence, when iGPUs are used, they use the CPU resources and can't display or run any demanding applications. Therefore, if you are planning on purchasing a GPU, ensure the CPU you are purchasing does not have iGPU so you can save some money there. For Intel CPUs, non-integrated graphics chips are denoted by an "F" so chips like i5 13400F or i9 13900KF do NOT have iGPUs. On the other hand, those without "F" have iGPUs like i5 13400 or i9 13900k
RAM (Random Access Memory): Temporary storage for data being used by the CPU. Basically, when the CPU is working, it stores and retrieves data from your RAM for fast access rather than your storage systems. Naturally, the more applications you open in the background, the more RAM your CPU consumes and when it's almost out, the computer will start slowing down though it would never hit 100% usage unless you have malware or an extremely low RAM storage.
- 2 key types of RAM, DDR4 and DDR5. DDR5 is basically a much faster version of DDR4 though DDR4 is still quite solid and usable.
Storage: SSDs (Solid State Drives) or HDDs (Hard Disk Drives) for storing your operating system, software, and files. They do exactly what their names say, store files and other things in your computer. Though there are key differences in SSDs and HDDs. SSDs store data in flash memory like the USB thumb drives you are used to. HDDs on the other hand store data in magnetic disks. Hence, they are slower and more outdated. On the plus side, they come in larger storage spaces and are generally much cheaper than SSDs. SSDs are generally recommended so games or files installed in them boot up faster.
Power Supply Unit (PSU): Provides power to all components. Basically what its name suggests again, it provides power to all components through cables linked all of the components into a big box usually placed at the bottom of the PC which has a switch and power plug.
Cooling System: Fans or liquid cooling to keep your components at safe temperatures. Again, the name suggests what it does. There's usually multiple fans in systems. Minimally, you would want a CPU cooling fan and 2 fans at the front of the chassis drawing cold air IN and a fan pushing hot air OUT.
- Important thing to note: Ensure your fans are pointing to the right direction to ensure proper airflow. Case fans usually have arrows or manuals informing you which way the fan is taking air in from. Ensure the fan at the back of the computer sucks air FROM the computer and OUT into the surroundings. Similarly, ensure fans at the front of the computer suck air FROM the surroundings and OUT into the computer.
Peripherals: Monitor, keyboard, mouse, and any other external devices.
**Step-by-Step Building Process**
- Prepare Your Workspace
Ensure you have a clean, static-free workspace.
Gather all your tools: screwdrivers, thermal paste, anti-static wrist strap to prevent any internal damage to the components.
**Install the CPU**
Locate the CPU socket on the motherboard, ensure the CPU is positioned correctly. Lift the retention arm and align the CPU with the socket. Gently place the CPU into the socket and secure it with the retention arm. Keep in mind some force is required to ensure the CPU is seated correctly.
Install the CPU Cooler
- Apply a small amount of thermal paste on the CPU. ENSURE there are no stickers on the bottom of your CPU cooler's surface. Attach the CPU cooler according to the manufacturer’s instructions. (Don't be daunted by the idea of liquid coolers, they are extremely simple to install, especially all-in-one liquid coolers, if you follow the instructions provided)
**Install RAM**
Locate the RAM slots on the motherboard. Align the RAM module with the slot and press down until it clicks into place, again force is required. Additionally, if you want to activate dual-channel mode in your RAM, ensure you have installed your RAM sticks in a 1-3 or 2-4 manner, leaving a gap in between them. Mount the Motherboard. Place the motherboard inside the case, aligning it with the standoff screws. Secure the motherboard with screws.
**Connect Front Panel Connectors**
Connect the case’s front panel connectors (power switch, reset switch, USB ports, audio jacks) to the motherboard.
**Install Storage**
Mount the SSD or HDD in the designated bays in the case. Connect the storage drives to the motherboard using SATA cables (for HDDs/SSDs) or M.2 slots (for NVMe SSDs). In any case, check the instructions in the box.
Connect the Power Supply
- Place the PSU in its designated area in the case. Connect the 24-pin ATX power cable (large thick cable, most amount of pins) to the motherboard. Connect the 8-pin (or 4+4 pin) CPU power cable. (they are 2 separate 4-pins which are connected to one 8-pin to the PSU) Connect power cables to the GPU and storage drives. There are usually writings on the cables denoting which cable goes where, if not check your instruction manual
- Take note of your cable management, try to keep the front of your PC clean for an aesthetically pleasing look. You can also use clips and binders to clean up loose cables.
**Install the GPU**
Insert the GPU into the PCIe slot on the motherboard, keep in mind force is required to ensure the GPU is seated and secured correctly. Secure the GPU with screws to the case.
**Install Additional Cooling** (if necessary)
Attach any additional case fans or liquid cooling components.
**Double-Check All Connections**
Ensure all components are securely connected and seated properly.
**Power On and Install the Operating System**
Connect your monitor, keyboard, and mouse.
Power on the PC and enter the BIOS/UEFI to ensure all components are recognized. Ensure RAM frequency speeds are configured properly, usually there is a setting in your BIOS called XMP. However, different Motherboard manufacturers have different BIOS UI. If unsure check the website of your Motherboard manufacturer.
- Insert your OS installation media (USB drive or DVD) and follow the on-screen instructions to install the operating system.
Update Drivers: Ensure all your drivers are up-to-date for optimal performance.
**Troubleshooting Common Issues**
No Power: Check all power connections and ensure the PSU switch is on and all components are seated correctly. Ensure the front-panel connectors are connected properly as well.
No Display: Ensure the GPU is seated properly and the monitor is connected to the GPU, not the motherboard. Usually, the GPU display port or HDMI will be located right at the GPU.
Overheating: Check that all fans are working and properly connected, check CPU cooler is working properly and thermal paste has been applied.
**MY EXPERIENCE**
When I first started to build my PC, I must admit I was absolutely stunned and did not know what to do. There were so many components, cables that needed to be connected to each other and I just felt so lost. Luckily, I had guides and YouTube videos to aid me in my building process. I had a number of key issues I encountered and I would like to share them so others can learn as well.
**ISSUE 1**
Connecting Cables after installing all the main components.
At first, I seated all my components into the motherboard before attempting to connect them all to the PSU through the cables. The issue here was it was going to be extremely difficult to connect cables and do proper cable management as I was using a MATX case which was already very crowded. As such, I had to remove my components and connect the power supply cable FIRST before installing the rest of the components.
**ISSUE 2**
RAM dual channel installation/BIOS settings
Dual channel mode is a feature for the same type and kind of RAM to work together as a single unit which provides a faster and more direct path to the CPU for usage. Hence, the speed of RAM will be even faster. The issue here was I connected RAM in a 1-2 formation like so:
However, in order for dual channel mode to work, RAM sticks must be installed with a gap in between them, or in a 1-3, 2-4 formation like so:
Additionally, I did not enable XMP in BIOS settings and thus my RAM frequency speeds were locked to 1600mhz. Eventually, I figured out that XMP had to be enabled in BIOS to unlock the full frequency of my RAM.
**ISSUE 3**
PC not turning on as front panel connectors were not connected properly
Front-panel connectors are extremely important, they ensure that at a click of a power button, it boots up the entire computer. When the connectors are not seated properly, it will lead to the computer not booting up entirely even though the rest of the components are installed properly. It's important to check the connectors as they are also extremely thin and small.
**CONCLUSION**
Building your own PC can seem daunting, but with careful planning and attention to detail, it’s a manageable and rewarding project. I hope this guide benefits beginners wanting to start on this project, but don't just take it from me! Learn more from more reliable tech sources like Gamers Nexus. Happy building!
| jcsaar |
1,893,782 | Back at it: Physically Based Rendering in Video Games | Sticking to this topic I’ve been writing about: Video Games and whatever is involved to make them so... | 0 | 2024-06-19T15:26:18 | https://dev.to/zoltan_fehervari_52b16d1d/back-at-it-physically-based-rendering-in-video-games-1g7m | videogames, gamedev, gamephysics, physicsbasedrendering | Sticking to this topic I’ve been writing about: Video Games and whatever is involved to make them so good…
Here is another topic:
Physically based rendering ([PBR](https://bluebirdinternational.com/physically-based-rendering/)) has revolutionized the visual quality of video games, bringing a level of realism that rivals blockbuster movies. This technique simulates the behavior of light based on physical properties, resulting in more lifelike textures and lighting effects.
## I like spoiling the Main Points
PBR accurately simulates real-world light interactions with materials, considering factors like reflectivity, roughness, and subsurface scattering. It has gained popularity in the gaming industry for its ability to create immersive environments. This article explores PBR’s origins, mechanics, and applications beyond gaming.
## I also like spoiling the Key Takeaways
- Physics-Based: PBR uses physics principles to calculate light interactions.
- Realism in Games: Enhances visual realism and immersion.
- Broad Applications: Used in architecture, automotive design, and visual effects.
- Future Potential: Emerging technologies are pushing PBR’s capabilities.
## PBR as a Computer Graphics Approach
PBR differs from traditional rendering by accounting for the physical properties of materials and light sources. It allows developers to create detailed and lifelike environments that react realistically to changes in lighting and camera angles. PBR enhances visual fidelity by enabling realistic representations of various materials and complex lighting effects.
## Understanding Physically Based Rendering
**Materials:** In PBR, materials are defined by properties like roughness, metallicness, and specular reflectivity, affecting light reflection and absorption.
**Lighting:** Considers light’s physical characteristics and interactions with materials, resulting in realistic shadows and highlights.
**Shading:** Based on energy conservation principles, ensuring realistic material appearances by not exceeding the light hitting a material.
## The Process of Physically Based Rendering
1. Capturing Real-World Data: Photographs of materials are taken at different angles and lighting conditions to create texture maps.
2. Material Modeling: Mathematical models simulate material properties, creating shaders that reflect light accurately.
3. Lighting Setup: Various lighting models simulate natural and artificial light sources, using techniques like global illumination and ambient occlusion.
4. Rendering: Combines data, material models, and lighting setups to generate final images using techniques like physically based shading and motion blur.
## Surfaces and Volume Renderings in PBR
**Surfaces:** Simulated by modeling light interactions with material properties, producing realistic lighting effects and textures.
**Volume Renderings:** Simulate objects with density and shape, like clouds and liquids, using algorithms to calculate light interactions.
## Advantages and Challenges of Physically Based Rendering
**Advantages:**
1. More realistic lighting and shading.
2. Greater flexibility and control over appearances.
3. Improved performance through reduced draw calls.
4. Physically accurate assets reduce manual adjustments.
**Challenges:**
1. Requires more computational power.
2. Time-consuming asset creation.
3. Dependent on accurate physical data.
4. Balancing visual quality and performance, especially on lower-end hardware.
## PBR Game Development Applications
**Performance Optimization:** Reduces draw calls and texture lookups, resulting in smoother gameplay.
**Memory Optimization:** Allows reuse of texture maps across objects, saving memory.
**Streamlined Content Creation:** Simplifies the creation and reuse of textures, speeding up development.
**Immersive Audio Experiences:** Enhances soundscapes by simulating material-based audio properties.
## Implementing PBR in Shaders, Textures, and Lighting
**Shaders:** Calculate lighting and color values based on materials and scene lighting.
**Textures:** Simulate surface properties like roughness and reflectivity, using maps like Albedo and Normal.
**Lighting:** Uses directional, environment, and image-based lighting to simulate natural conditions.
## Best Practices:
- Use accurate values for realism.
- Optimize performance to manage computational demands.
- Experiment with lighting setups for desired effects.
- Utilize pre-made PBR material libraries for efficiency.
## Origins and Evolution of Physically Based Rendering
**Origins:** PBR gained popularity in the mid-2000s, with games like Star Wars: The Force Unleashed pioneering its use.
**Evolution:** Advances in hardware and software have led to more complex material simulations and real-time calculations, fostering collaboration between developers and artists.
**Relevance Today:** PBR is standard in game development, used in high-end and indie games alike. It continues to evolve with technological advancements, making it more accessible and powerful.
## PBR in Other Industries
**Architecture:** Used for creating virtual models of buildings, allowing for realistic visualizations.
**Automotive Design:** Enables realistic renderings of car models for design evaluation.
**Visual Effects:** Creates detailed and dynamic environments for movies and TV shows.
## Pushing the Boundaries of Physically Based Rendering
**Future Technologies:** Ray tracing and machine learning are being integrated into PBR workflows for even more realistic simulations.
**Hardware Advancements:** New technologies like NVIDIA’s RTX and AMD’s RDNA2 enhance PBR capabilities.
**Importance of Research:** Ongoing research optimizes PBR and makes it more accurate and accessible.
**Developer Role:** Developers must continue to innovate with PBR to create groundbreaking experiences.
## Alternatives to Physically Based Rendering
**Non-Physically Based Rendering:** Simplifies models for stylized or cartoon-like games.
**Cel-Shading:** Creates hand-drawn or animated looks.
**Procedural Generation:** Uses algorithms to create textures on the fly.
**Hybrid Techniques:** Combines PBR with other methods for unique visual styles. | zoltan_fehervari_52b16d1d |
1,893,780 | Virtual DOM, Fiber and reconciliation | Ques:-How createRoot method works behind the seen? Ans:- By creating a virtual DOM structure... | 0 | 2024-06-19T15:24:29 | https://dev.to/geetika_bajpai_a654bfd1e0/virtual-dom-fiber-and-reconciliation-198j |
Ques:-How createRoot method works behind the seen?
Ans:- By creating a virtual DOM structure similar to the browser's DOM.
Ques:- Why createRoot needs to create DOM?
Ans:- This virtual DOM allows for a comparison between the main DOM and the newly created DOM, enabling updates only for elements that have actually changed in the UI.
Ques:-Difference Between Browser Virtual DOM and ReactJS Virtual DOM:
Ans:-In contrast, the browser typically removes and repaints the entire DOM during a page reload, reconstructing the web structure from scratch. This process, known as a page reload, is why the page refreshes and the reload button becomes active.
In ReactJS, the virtual DOM works differently. It traces the entire DOM in a tree-like structure, allowing it to identify and remove only the values that have changed. The virtual DOM then updates the real DOM with these changes, optimizing performance and reducing unnecessary re-renders.
Additionally, ReactJS can handle frequent updates more efficiently. By using techniques like debouncing or batching updates, ReactJS can wait for a short period (e.g., 2-3 seconds) before applying changes. This ensures that only the final state is rendered, avoiding intermediate updates and improving overall performance.
Ques:-Is it possible to avoid immediate updates and instead optimize them using an algorithm?
Ans:-Yes, it is. There is no need to update the UI immediately every time. We can drop intermediate update calls and send only the final update calls.
## React Fiber Architecture
The goal of React Fiber is to enhance React's performance in areas such as animation, layout, and gestures. Its key feature, incremental rendering, allows rendering work to be split into chunks and spread over multiple frames. Other notable features include the ability to pause, abort, or reuse work as new updates arrive, assign priority to different updates, and utilize new concurrency primitives.
## What is reconciliation?
- reconciliation:-The algorithm React uses to diff one tree with another to determine which parts need to be changed.
- update:-A change in the data used to render a React app. Usually the result of `setState`. Eventually results in a re-render.
The central idea of React's API is to treat updates as if they cause the entire app to re-render. This enables developers to think declaratively, without worrying about efficiently transitioning the app between states.
Reconciliation is the algorithm behind the "virtual DOM." When a React application renders, it generates and saves a tree of nodes in memory, which is then translated to DOM operations in the browser. Upon updates (typically via setState), a new tree is generated and compared with the previous one to determine the necessary operations to update the app efficiently.
## Reconciliation v/s rendering
Reconciliation and rendering are distinct phases in React's architecture. The reconciler determines changes within the tree structure, while the renderer applies those changes to update the app in its specific rendering environment, whether it's the DOM for web or native views for iOS and Android via React Native. This separation allows React to support multiple rendering targets efficiently by sharing a common reconciler while adapting specific renderers for each platform.
With Fiber, React's reconciler has been re-implemented to enhance performance and enable incremental rendering. While Fiber focuses on reconciliation, renderers need to adapt to leverage its new architecture effectively.
## Scheduling
- scheduling:-the process of determining when work should be performed.
- work:-any computations that must be performed. Work is usually the result of an update (e.g. setState).
## Key points:
- Not every UI update needs immediate application to avoid wastefulness and maintain smooth user experience, preventing frame drops.
- Updates vary in priority; for instance, animations should take precedence over updates from a data store.
- A push-based approach requires manual scheduling of work by the developer, while a pull-based approach, like React employs, allows the framework to intelligently manage scheduling decisions.
## What is a fiber?
Fiber is to enable React to take advantage of scheduling.
- pause work and come back to it later.
- assign priority to different types of work.
- reuse previously completed work.
- abort work if it's no longer needed.
| geetika_bajpai_a654bfd1e0 | |
1,891,009 | Parlons pattern: BFF | Aujourd'hui, nous allons parler pattern. Il se présente comme le meilleur ami des développeurs (BFF,... | 0 | 2024-06-19T15:23:16 | https://dev.to/claranet/parlons-pattern-bff-34jn | webdev, microservices, frontend, architecture | Aujourd'hui, nous allons parler pattern.
Il se présente comme le meilleur ami des développeurs (BFF, you got it ? 😶), mais on l'utilise souvent sans le connaître.
Penchons nous sur le **Backend For Frontend** !
## Pourquoi ce pattern ?
En développant des applications web, on est souvent confronté à une volonté de **récupération de données**, majoritairement **provenant d'API**...
Et en travaillant dans un **contexte MACH** (Micro Services, API-first, Cloud Native, Headless), où ces données vont **provenir de plusieurs sources**, c'est souvent l'application Frontend qui va se charger de leur récupération et manipulation.
Tant que l'**application** reste **simple**, on pourrait se **contenter de ce fonctionnement**.
Mais on imagine bien que plus l'**application gagne en cas d'usage**, plus on va se retrouver avec beaucoup de **logique de transformation, d’agrégation**...
Et ce, dans **chaque application Frontend du périmètre**: mobile, web, embarquée...
Dans notre exemple précédent, on imagine de multiples API, mais on pourrait aussi imaginer un Backend unique !
Et dans ce cas, la donnée exposée aux Frontend se verra de plus en plus générique, de moins en moins spécialisée aux usages des Frontend... Et on se retrouvera avec les même problématiques: transformation, aggregation etc.
_Est-ce vraiment ce que l'équipe souhaite ?_
Dans le cas où la réponse serait négative, continuons la (re)découverte de ce pattern !
## Qu'est ce qu'un BFF ?
Un Backend For Frontend, c'est donc une **couche** qui se place **entre le Frontend et les API**.
Au lieu de laisser le Frontend **faire les appels** aux différentes API et **agréger**, on se contente de faire un appel au **BFF qui va lui faire le travail**.
On déplace le travail côté serveur en évitant de surcharger le navigateur avec des tâches à faible valeur ajoutée.
Le BFF va finalement retourner une **réponse prête à être consommée** par les Frontend du même type.
Par exemple, il y a de fortes chances pour que la donnée sur **iOS** et **Android** soit utilisée de la même manière, **un BFF pour ces deux applications** pourrait suffire.
## Comment l'implémenter ?
Partons d'un existant où tous vos Frontend appelleraient un ensemble d'API. Chaque Frontend va porter sa logique de manipulation des données.
Nous allons introduire une couche supplémentaire côté mobile et côté web, notre BFF.
Au passage, nous profiterons ainsi de facilités d'évolution pour nos applications mobiles, car **moins soumises au redéploiement sur les stores**.
## Quelles différences avec l'API Gateway ?
On pourrait se poser la question car les deux solutions ont le même esprit: une **couche passerelle** entre des applications consommatrices de données, et des services qui la propose.
Les grandes différences se situent :
- Sur le périmètre adressé
Là où l'**API Gateway** va servir de **point unique**, on l'a vu, le **BFF** va être **dédié pour un seul type de client**: mobile, web, console de jeu... Car chaque **type de client** peut avoir **sa spécificité** en terme de présentation de donnée, de gestion d'erreurs, d'authentification etc
- Sur les responsabilités
Techniquement, vous allez pouvoir **gérer du cache**, du **rate limiting**, de la **monétisation** côté serveur... Mais **ce n'est vraiment pas le but du BFF** !
Il faudrait plutôt privilégier des solutions d'**API Gateway / Management** comme [Gravitee](https://www.gravitee.io/).
Et donc vous l'avez compris, on peut tout à fait combiner BFF et API Gateway, ils n'ont pas les mêmes usages.
**_Ça pourrait mériter un article dédié !_**
## Comment se décider ?
_Voyons quelques avantages et inconvénients à l'usage du pattern BFF._
- + Résilient aux changements d'API
- + Gestion des erreurs provenant des API, retransmission dans un format intéressant pour les Frontend
- + Une donnée présentée sur mesure
- - Nécessité d'avoir + de compétences fullstack dans l'équipe
- - Maintient d'une couche supplémentaire
La question intéressante à se poser pour savoir si l'implémentation d'un BFF est nécessaire, serait:
> Est-ce que j'ai besoin de proposer une expérience différentes aux utilisateurs selon le type d'application ?
Prenons l'exemple d'une console de salon.
Il y a de grande chance pour que l'**expérience utilisateur** souhaitée soit **différente** selon l'application utilisée: dashboard web, application mobile, interface de la console...
La donnée sera présentée différemment, l'authentification sera différente...
Le pattern BFF aurait tout à fait sa place dans ce contexte.
Par contre, si vous développez une **application unique**, avec un **scope réduit**, la **complexité** induite par une nouvelle couche dans votre architecture ne serait **pas nécessaire**.
## Quelques réflexions supplémentaires...
Réfléchir au pattern BFF, c'est déjà avoir **envisagé les micro-services** comme une solution potentielle.
_Est-ce vraiment le cas, quels seraient les cas d'usages parfait pour ce besoin d'architecture ?_
_Est-ce que j'ai plutôt intérêt à partir sur le développement d'un monolithe modulaire ?_
_Comment mettre en place une API Gateway dans mon architecture ?_
## Ressources
- [The API gateway pattern versus the Direct client-to-microservice communication](https://learn.microsoft.com/fr-fr/dotnet/architecture/microservices/architect-microservice-container-applications/direct-client-to-microservice-communication-versus-the-api-gateway-pattern)
- [What Is A Backend For A Frontend (BFF) Architecture Pattern](https://www.youtube.com/watch?v=SSo-z16wEnc&ab_channel=GoingHeadlesswithJohn)
- [Backend for Frontend Pattern in Microservices](https://www.youtube.com/watch?v=GCx0aouuEkU&ab_channel=ArpitBhayani)
- [Backend for frontend (BFF) pattern— why do you need to know it?](https://medium.com/mobilepeople/backend-for-frontend-pattern-why-you-need-to-know-it-46f94ce420b0)
- [7 Key Lessons I Learned While Building Backends-for-Frontends
](https://wundergraph.com/blog/7-key-lessons-i-learned-while-building-bffs)
- [Pattern: API Gateway / Backends for Frontends](https://microservices.io/patterns/apigateway.html)
----
Je suis Baptiste FAMCHON, Tech Lead spécialisé frontend chez Claranet.
J'écris régulièrement sur [dev.to](https://dev.to/claranet) et [LinkedIn](https://www.linkedin.com/in/baptiste-famchon/) à propos de sujets autour du web et de l'artisanat logiciel.
Chez [Claranet](https://www.claranet.com/), nous vous accompagnons aussi dans vos réflexions de modernisation SI, d'infrastructure cloud, de sécurité et de développement web.
N'hésitez pas à nous contacter ! 🚀 | bfamchon |
1,893,778 | Developing a Python Library for Analyzing Cryptocurrency Blockchain Data | In the rapidly evolving world of cryptocurrencies, blockchain technology has emerged as the backbone... | 0 | 2024-06-19T15:22:34 | https://dev.to/scofieldidehen/developing-a-python-library-for-analyzing-cryptocurrency-blockchain-data-4m8g | blockchain, python, cryptocurrency, web3 | In the rapidly evolving world of cryptocurrencies, blockchain technology has emerged as the backbone that underpins these decentralized digital currencies. Everyone seems to
The blockchain is a distributed, immutable ledger that records transactions within a cryptocurrency network.
As cryptocurrency adoption grows, so does the need for robust tools to analyze and understand the vast amount of data stored on these blockchains.
This article will guide you through developing a Python library to analyze cryptocurrency blockchain data. We'll cover everything from developing the development environment to implementing core functionalities for transaction tracking, address monitoring, and network analysis.
## [Top 10 Web3 Grants You Should Know About](https://blog.learnhub.africa/2024/06/18/top-10-web3-grants-you-should-know-about/)
By the end of this article, you'll have a comprehensive understanding of how to build a powerful tool for gaining insights into the intricate world of blockchain data.
## Prerequisites
Before we dive into the library development process, let's ensure you have the necessary prerequisites:
1. **Basic understanding of Python programming language**: This article assumes you have a working knowledge of Python syntax, data structures, and control flow statements.
2. **Familiarity with object-oriented programming (OOP) concepts**: Our library will be built using an object-oriented approach, so understanding concepts like classes, objects, inheritance, and encapsulation is essential.
3. **Knowledge of popular Python libraries**: We'll be utilizing several popular Python libraries, such as requests (for making HTTP requests), json (for parsing JSON data), and `datetime` (for working with timestamps).
4. **Setting up a development environment**: You'll need to install Python on your machine, along with a code editor or integrated development environment (IDE) of your choice (e.g., Visual Studio Code, PyCharm, or Sublime Text).
5. **Understanding of fundamental blockchain concepts**: While a deep understanding of blockchain technology is not required, familiarity with blocks, transactions, mining, and consensus mechanisms will be beneficial.
## Library Architecture
Our Python library for analyzing cryptocurrency blockchain data will consist of several components, classes, and modules. Let's outline the overall architecture:
1. **Node Connection**: We'll implement functionality to establish connections to various blockchain nodes (e.g., Bitcoin, Ethereum) using their respective APIs or remote procedure call (RPC) interfaces.
2. **Data Fetching and Parsing**: The library will include methods for fetching and parsing blockchain data from the connected nodes, such as blocks and transactions. This data will typically be in JSON format, so we'll utilize the json library for efficient parsing.
3. **Data Storage and Indexing**: We must store and index the fetched blockchain data to facilitate efficient analysis. We'll explore different options, such as using a lightweight database (e.g., SQLite) or implementing an in-memory data structure.
4. **Core Classes**: We'll define core classes to represent fundamental blockchain entities, such as Block, Transaction, Address, and others. These classes will encapsulate the relevant data and provide methods for querying and manipulating the data.
## [How Web3 Decentralization Can Dismantle Big Tech Monopolies in 2024](https://blog.learnhub.africa/2024/02/14/how-web3-decentralization-can-dismantle-big-tech-monopolies-in-2024/)
1. **Utility Functions**: Additionally, we'll implement various utility functions for tasks like data conversion, validation, and formatting.
Here's an example of how we might define the Block class:
from datetime import datetime
class Block:
def __init__(self, block_data):
self.hash = block_data['hash']
self.height = block_data['height']
self.timestamp = datetime.fromtimestamp(block_data['time'])
self.transactions = [Transaction(tx) for tx in block_data['tx']]
def __repr__(self):
return f"Block(hash='{self.hash}', height={self.height}, timestamp={self.timestamp})"
In this example, the Block class takes a dictionary representing the block data. It initializes its properties, such as the block hash, height, timestamp, and a list of Transaction objects representing the transactions included in the block.
## Core Functionality
Now that we've outlined the library architecture let's dive into the core functionality of our Python library for analyzing cryptocurrency blockchain data.
Transaction Analysis
One of the primary use cases for our library will be to analyze cryptocurrency transactions. Here are some key features we'll implement:
1. **Tracking Transactions**: We'll provide methods to fetch and parse transaction data, including inputs, outputs, amounts, and fees. This will allow users to trace the flow of funds through the blockchain.
def get_transaction(txid):
# Fetch transaction data from the node
tx_data = node.getrawtransaction(txid, True)
# Parse the transaction data
inputs = []
outputs = []
for tx_input in tx_data['vin']:
inputs.append({
'txid': tx_input['txid'],
'vout': tx_input['vout'],
'amount': tx_input['value']
})
for tx_output in tx_data['vout']:
outputs.append({
'address': tx_output\['scriptPubKey'\]['addresses'][0],
'amount': tx_output['value']
})
return {
'txid': txid,
'inputs': inputs,
'outputs': outputs
}
1. **Identifying Transaction Patterns**: We'll implement algorithms to detect common transaction patterns, such as multiple inputs (consolidating funds), change outputs (leftover funds returned to the sender), and other patterns that could indicate specific types of activities.
2. **Analyzing Transaction Fees and Miner Preferences**: Our library will provide functionality to analyze transaction fees paid to miners and identify potential miner preferences based on patterns in the transactions they include in blocks.
## Address Analysis
Another crucial aspect of blockchain analysis is monitoring and analyzing addresses. Our library will include the following features:
1. **Monitoring Address Balances and Transaction History**: We'll implement methods to fetch and track specific addresses' balance and transaction history. This will enable users to monitor addresses of interest, such as those associated with exchanges, wallets, or potential illegal activities.
2. **Clustering Addresses**: We'll develop algorithms to cluster addresses based on patterns or heuristics, such as addresses that frequently interact with each other or share common inputs or outputs. This can help identify potential address ownership or relationships between addresses.
3. **Identifying Potential Address Ownership**: Building upon the address clustering functionality, we'll implement techniques to identify potential address ownership, such as associating addresses with known cryptocurrency exchanges, wallets, or other entities.
## Network Analysis
In addition to transaction and address analysis, our library will provide tools for monitoring and analyzing the broader cryptocurrency network.
1. **Monitoring Network Activity**: We'll implement methods to monitor various aspects of the blockchain network, such as block propagation times, mining pool activity, and overall network health metrics.
2. **Detecting Potential Attacks or Anomalies**: Our library will include algorithms to detect potential attacks or anomalies on the network, such as double-spending attempts, 51% attacks (where a single entity controls most of the network's mining power), or other suspicious activities.
3. **Analyzing Mining Difficulty and Reward Distribution**: We'll provide the functionality to track and analyze the mining difficulty and reward distribution across different mining pools or individual miners.
## Additional Features
To make our Python library truly comprehensive, we'll discuss additional features that could be incorporated:
1. **Integrating with Blockchain Explorers or APIs**: While our library will primarily fetch data directly from blockchain nodes, we could also integrate with popular blockchain explorers or third-party APIs to retrieve additional data or enhance existing functionality.
2. **Implementing Caching Mechanisms**: We could implement caching mechanisms to store and retrieve data more efficiently to improve performance, particularly for frequently accessed data.
3. **Enabling Parallel Processing**: For large-scale analysis or processing-intensive tasks, we could explore ways to leverage parallel processing techniques, such as multithreading or multiprocessing, to distribute the workload and improve overall performance.
4. **Providing Visualization Tools**: To enhance the usability of our library, we could consider integrating visualization tools to display data in a more intuitive and visually appealing manner, such as transaction graphs, network activity charts, or interactive dashboards.
5. **Tracking and Analyzing Transactions for a Specific Wallet**: Suppose you want to monitor the transactions associated with a particular cryptocurrency wallet. You could use our library to fetch the transaction history, analyze the inputs and outputs, identify patterns, and even track the movement of funds across multiple addresses.
from blockchain_analyzer import get_transaction, Node
# Connect to a Bitcoin node
node = Node('http://username:password@host:port')
# Address of the wallet you want to monitor
wallet_address = "1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2"
# Fetch and analyze the transactions for the wallet
transactions = []
for tx_id in node.getaddresstransactions(wallet_address):
tx_data = get_transaction(tx_id)
transactions.append(tx_data)
# Print some details about the transactions
for tx in transactions:
print(f"Transaction ID: {tx['txid']}")
print(f"Inputs: {len(tx['inputs'])}")
print(f"Outputs: {len(tx['outputs'])}")
print("-" * 20)
In this example, we first connect to a Bitcoin node using the `Node` class. We then specify the wallet address we want to monitor and fetch all the transaction IDs associated with that address using the `getaddresstransactions` method provided by the node.
For each transaction ID, we use our `get_transaction` function to retrieve and parse the transaction data, including the inputs and outputs. We store these transaction details in a list for further analysis.
Finally, we iterate through the list of transactions and print some basic information about each one, such as the transaction ID, the number of inputs, and the number of outputs.
**Monitoring a Cryptocurrency Exchange's Hot and Cold Wallets**: Cryptocurrency exchanges often use a combination of hot wallets (connected to the internet for processing transactions) and cold wallets (offline for secure storage). Our library can be used to monitor the activity of these wallets, potentially detecting suspicious patterns or identifying potential security breaches.
from blockchain_analyzer import get_transaction, cluster_addresses
# Known hot wallet addresses for the exchange
hot_wallets = ["1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa", "1LJWef2d1P1eP5QGefi2DMPTfTL5SLmv7D"]
# Fetch transactions for the hot wallets
transactions = []
for wallet in hot_wallets:
for tx_id in node.getaddresstransactions(wallet):
tx_data = get_transaction(tx_id)
transactions.append(tx_data)
# Cluster addresses based on transaction patterns
clustered_addresses = cluster_addresses(transactions)
# Analyze the clusters for potential cold wallets
for cluster in clustered_addresses:
if len(cluster) > 1 and all(addr not in hot_wallets for addr in cluster):
print(f"Potential cold wallet addresses: {cluster}")
In this example, we start with a list of known hot wallet addresses a cryptocurrency exchange uses. We fetch all the transactions associated with these hot wallets using our library's `get_transaction` function.
Next, we use a hypothetical `cluster_addresses` function (which we would need to implement) to cluster addresses based on their transaction patterns. This could involve techniques like identifying addresses that frequently interact with each other or share common inputs or outputs.
After clustering the addresses, we analyze each cluster to identify potential cold wallets. We look for clusters containing more than one address and where none are known hot wallets. These clusters could potentially represent the exchange's cold wallets, which are used for secure fund storage.
1. **Identifying Potential Money Laundering or Illegal Activity Patterns**: Law enforcement agencies or regulatory bodies could leverage our library to detect patterns indicating money laundering or other illegal activities involving cryptocurrencies.
from blockchain_analyzer import get_transaction, detect_patterns
# List of known addresses associated with illegal activities
suspicious_addresses = ["1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa", "1LJWef2d1P1eP5QGefi2DMPTfTL5SLmv7D"]
# Fetch transactions involving the suspicious addresses
transactions = []
for addr in suspicious_addresses:
for tx_id in node.getaddresstransactions(addr):
tx_data = get_transaction(tx_id)
transactions.append(tx_data)
# Analyze the transactions for potential illegal patterns
patterns = detect_patterns(transactions)
# Print the detected patterns
for pattern, tx_ids in patterns.items():
print(f"Pattern: {pattern}")
print(f"Associated transactions: {', '.join(tx_ids)}")
print("-" * 20)
In this example, we start with a list of known addresses associated with illegal activities, such as darknet markets or ransomware campaigns. We fetch all the transactions involving these addresses using our library.
We then use a hypothetical `detect_patterns` function (which we would need to implement) to analyze the transactions and identify potential patterns that may indicate illegal activities, such as structuring (breaking up large amounts into smaller transactions), layering (moving funds through multiple addresses to obfuscate the trail), or other suspicious patterns.
The `detect_patterns` function could return a dictionary mapping detected patterns to the associated transaction IDs. We iterate through this dictionary and print the detected patterns along with the associated transactions for further investigation.
1. **Analyzing the Distribution of Mining Rewards across Different Pools**: Our library could also be useful for analyzing the distribution of mining rewards across different mining pools or individual miners, providing insights into the concentration of mining power within the network.
from blockchain_analyzer import get_block, analyze_mining_rewards
# Fetch recent blocks
recent_blocks = []
for height in range(node.getblockcount(), node.getblockcount() - 100, -1):
block_hash = node.getblockhash(height)
block_data = get_block(block_hash)
recent_blocks.append(block_data)
# Analyze the mining reward distribution
reward_distribution = analyze_mining_rewards(recent_blocks)
# Print the reward distribution
for miner, reward in reward_distribution.items():
print(f"Miner: {miner}")
print(f"Total rewards: {reward} BTC")
print("-" * 20)
In this example, we fetch the data for the most recent 100 blocks from the blockchain using our library's `get_block` function. We store these block data objects in a list for analysis.
We then use a hypothetical `analyze_mining_rewards` function (which we need to implement) to analyze the distribution of mining rewards across different miners or mining pools. This function could identify the addresses or entities that have mined each block and calculate the total rewards each miner or pool receives.
Finally, we print the reward distribution, showing the total rewards received by each miner or mining pool over the analyzed period.
These examples illustrate a few potential use cases for our Python library for analyzing cryptocurrency blockchain data. With the core functionality we've implemented and the additional features discussed earlier, our library can be adapted and extended to meet a wide range of analysis needs in the cryptocurrency space.
## Conclusion
Throughout this article, we've explored the process of developing a Python library specifically designed for analyzing cryptocurrency blockchain data. We started by setting the context and ensuring you have the necessary prerequisites. We then outlined the overall architecture of our library, covering components such as node connections, data fetching and parsing, data storage, and core classes.
We explored our library's core functionality, including transaction analysis, address monitoring, and network analysis. We provided code examples and explanations for implementing features like transaction tracking, address clustering, and detecting potential attacks or anomalies.
Additionally, we discussed potential enhancements and additional features, such as integrating with blockchain explorers or APIs, implementing caching mechanisms, enabling parallel processing, and providing visualization tools.
To solidify your understanding, we explored several real-world usage examples, demonstrating how our library can track and analyze transactions for specific wallets, monitor cryptocurrency exchange activities, identify potential illegal patterns, and analyze mining reward distributions.
Following the steps outlined in this article gives you the knowledge and tools to build a powerful Python library for analyzing cryptocurrency blockchain data. Whether you're a researcher, a cryptocurrency enthusiast, or a professional in the industry, this library can provide valuable insights into the vast and complex world of blockchain data.
Our library can be extended and adapted as the cryptocurrency landscape evolves to meet new challenges and requirements.
## Resources
- [Natural Language Processing with Python](https://www.nltk.org/book/)
- [Spacy 101: Everything you need to know](https://spacy.io/usage/spacy-101)
- [Building Chatbots with Python](https://www.oreilly.com/library/view/building-chatbots-with/9781788470940/)
- [LearnHub Blog](https://blog.learnhub.africa/)
- [Python](https://www.python.org/about/gettingstarted/)
- [Datacamp](http://datacamp.com)
- [LearnHub](https://blog.learnhub.africa/)
| scofieldidehen |
1,893,777 | DNS Lookup Web Application | DNS records are crucial for translating human-friendly domain names, like medium.com, into IP... | 0 | 2024-06-19T15:22:32 | https://dev.to/riottecboi/dns-lookup-web-application-2llf | fastapi, python, geopy, folium |
> DNS records are crucial for translating human-friendly domain names, like medium.com, into IP addresses that computers use to identify each other on the network. This translation is fundamental for accessing websites, sending emails, and other internet functionalities. WHOIS information provides details about the domain registration, including the registrant's contact information, domain status, and key dates.
## Project Structure
```
DNS-Lookup/
├── app/
│ ├── core/
│ │ └── _config.py
│ │ └── settings.cfg
│ ├── routes/
│ │ └── _dnsLookup.py
│ ├── schemas/
│ │ ├── _dnsRequest.py
│ │ └── _whoisInfo.py
│ └── utils/
│ └── _dns.py
├── main.py
├── requirements.txt
├── static/
│ └── ... (static files)
└── templates/
└── index.html
```
## Installation
Clone the repository:
```
git clone https://github.com/riottecboi/DNS-Lookup.git
```
This project running on Python 3.11, so please be sure that you are install Python 3.11 on your machine.
```
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt update
sudo apt install python3.11 -y
sudo apt-get install python3-pip -y
```
Install virtual environment library if it’s not on your machine and initialize your virtual environment in your project and activate the virtual environment.
```
python3.11 -m pip install virtualenv
python3.11 -m venv <virtual-environment-name>
source <virtual-environment-name>/bin/activate
```
Install all required libraries for this project from the file _requirements.txt_.
```
python3.11 -m pip install -r requirements.txt
```
## Usage
1. Start the FastAPI server:
```
uvicorn main:app --reload
```
2. Open your web browser and navigate to `http://localhost:8000`
3. Enter a domain name in the provided input field.
4. View the DNS records and WHOIS information displayed on the web page.
## Dockerize
We can also run application as container as well. Please build an image from _Dockerfile_ in the project.
```
docker build -f docker/Dockerfile -t dns-lookup .
```
Then, running a container with the above image by
```
docker run -n DNS-Lookup -p 8000:8000 dns-lookup -d
```
## Explanation
This code defines two Pydantic models:
__dnsRequest.py_
```
from pydantic import BaseModel, model_validator
import validators
import socket
class DomainOrIP(BaseModel):
domain_or_ip: str
@model_validator(mode='after')
def validate_domain_or_ip(cls, value):
try:
# Check if input is IP address
socket.inet_pton(socket.AF_INET, value.domain_or_ip)
return value
except socket.error:
pass
try:
# Check if input is IPv6 address
socket.inet_pton(socket.AF_INET6, value.domain_or_ip)
return value
except socket.error:
pass
try:
# Check if input is domain name
validators.domain(value.domain_or_ip)
return value
except socket.error:
pass
raise ValueError(f"Invalid Domain or IP.")
class ErrorResponse(BaseModel):
error: str
message: str
```
_DomainOrIP_:
This model has a single field called `domain_or_ip` of type `str`.
It has a `model_validator` decorator that applies the `validate_domain_or_ip` function after the model has been initialized.
The `validate_domain_or_ip` function performs the following validations:
- First, it tries to validate if the input `domain_or_ip` is a valid IPv4 address using the `socket.inet_pton` function with `socket.AF_INET`.
- If the input is not a valid IPv4 address, it tries to validate if it's a valid IPv6 address using `socket.inet_pton` with `socket.AF_INET6`.
- If the input is neither an IPv4 nor an IPv6 address, it tries to validate if it's a valid domain name using the `validators.domain` function from the `validators` library.
- If the input fails all three validations, it raises a `ValueError` with the message "Invalid Domain or IP."
- If the input passes any of the validations, the function returns the original value without any modifications.
_ErrorResponse_:
- This model has two fields: `error` (str) and `message` (str).
- It is likely used to represent an error response payload when an error occurs in the application.
The purpose of this code is to provide a way to validate user input and ensure that it is either a valid IP address (IPv4 or IPv6) or a valid domain name. This validation is important because the application likely needs to handle both IP addresses and domain names correctly.
The _ErrorResponse_ model is used to create a structured error response that can be returned to the client when an error occurs, such as when the input is invalid.
__dns.py_
```
import asyncio
import validators
import whois
import folium
from geopy import Nominatim
from schemas._whoisInfo import WhoisInfo
class DomainLocator:
def __init__(self, domain: str):
self.geolocator = Nominatim(user_agent="DNS_lookup")
self.domain = domain
self.domain_info = None
self.return_info = None
self.domain_map = None
async def fetch_domain_info(self):
try:
loop = asyncio.get_event_loop()
self.domain_info = await loop.run_in_executor(None, whois.whois, self.domain)
except Exception as e:
print(f"Error fetching WHOIS information for {self.domain}: {e}")
async def get_coordinates(self, location):
try:
location = self.geolocator.geocode(location)
if location:
return location.latitude, location.longitude
else:
return None, None
except Exception as e:
print(f"Error fetching coordinates for {location}: {e}")
return None, None
async def plot_domain_location(self):
if self.domain_info and self.domain_info.registrar:
location = self.domain_info.address
if self.domain_info.country and isinstance(self.domain_info.country, str):
location = self.domain_info.country
if self.domain_info.city and isinstance(self.domain_info.city, str):
location = self.domain_info.city
lat, lon = await self.get_coordinates(location)
if lat and lon:
map = folium.Map(location=[lat, lon], zoom_start=4)
folium.Marker([lat, lon], popup=f"{self.domain}").add_to(map)
self.domain_map = map.get_root()._repr_html_()
else:
print(f"Unable to find coordinates for location: {location}")
else:
print(f"No registrar information found for {self.domain}")
self.domain_map = ''
async def map_whois_data(self, data):
if self.domain_info.domain_name and "Name or service not known" not in self.domain_info.text:
whois_fields = list(WhoisInfo.model_fields.keys())
self.return_info = {}
for field in whois_fields:
if field in data:
self.return_info[field] = data[field]
return self.return_info
else:
return {}
async def process_domain(self):
if self.domain:
print(f"Processing domain: {self.domain}")
await self.fetch_domain_info()
await self.map_whois_data(self.domain_info)
await self.plot_domain_location()
return self.return_info, self.domain_map
else:
print("No valid domain to process")
return None, None
```
This code defines a `DomainLocator` class that is responsible for fetching WHOIS information for a given domain, mapping the WHOIS data to a structured model, and plotting the location of the domain on a map using the `folium` library.
- `__init__(self, domain: str)`:
- Initializes the `DomainLocator` instance with a domain name.
- Creates a `Nominatim` instance from the `geopy` library for geocoding purposes.
- Sets the `domain_info`, `return_info`, and `domain_map` attributes to `None` initially.
- `async fetch_domain_info(self)`:
- Fetches the WHOIS information for the given domain using the `whois` library.
- Runs the `whois.whois` function in an executor to avoid blocking the event loop.
- Stores the WHOIS information in the `domain_info` attribute.
- `async get_coordinates(self, location)`:
- Takes a location string as input and uses the `Nominatim` geocoder to retrieve the latitude and longitude coordinates.
- Returns the coordinates as a tuple `(latitude, longitude)` or `(None, None)` if the location could not be geocoded.
- `async plot_domain_location(self)`:
- Attempts to determine the location of the domain based on the available WHOIS information (address, country, or city).
- Calls the `get_coordinates` method to obtain the latitude and longitude coordinates for the location.
- If coordinates are found, creates a `folium` map centered on those coordinates and adds a marker for the domain.
- Stores the HTML representation of the map in the `domain_map` attribute.
- `async map_whois_data(self, data)`:
- Maps the WHOIS data to the `WhoisInfo` model defined in the `schemas._whoisInfo` module.
- Iterates over the fields in the `WhoisInfo` model and populates the `return_info` dictionary with the corresponding values from the WHOIS data.
- Returns the `return_info` dictionary if the WHOIS data is valid, or an empty dictionary if the data is not available or invalid.
- `async process_domain(self)`:
- The main method that orchestrates the entire process of fetching WHOIS information, mapping the data, and plotting the domain location.
- Calls the `fetch_domain_info`, `map_whois_data`, and `plot_domain_location` methods in sequence.
- Returns the `return_info` dictionary and the `domain_map` HTML content.
This class is designed to be used asynchronously, as indicated by the async keyword on the methods. It leverages the asyncio library and the _run_in_executor_ function to offload blocking operations (like fetching WHOIS data) to a separate executor, allowing the event loop to remain responsive.
The _process_main_ method can be called with a valid domain name, and it will return the structured WHOIS information and a map showing the location of the domain (if available).
__dnsLookup.py_
```
import json
import os
from fastapi import APIRouter, HTTPException, Response, Request, Form, status, Depends
from fastapi.responses import RedirectResponse
from utils._dns import DomainLocator
from schemas._dnsRequest import DomainOrIP, ErrorResponse
from pydantic_core._pydantic_core import ValidationError
from cryptography.fernet import Fernet
from fastapi.templating import Jinja2Templates
key = Fernet.generate_key()
cipher_suite = Fernet(key)
folder = os.getcwd()
os.chdir("..")
path = os.getcwd()
templates = Jinja2Templates(directory=path+"/templates")
router = APIRouter()
def serialize_datetime(dt_or_list):
if isinstance(dt_or_list, list):
return [dt.isoformat() for dt in dt_or_list]
if dt_or_list is None:
return ''
else:
return dt_or_list.isoformat()
async def process_and_encrypt_data(domain_or_ip: str):
try:
validated_input = DomainOrIP(domain_or_ip=domain_or_ip)
domain_or_ip = validated_input.domain_or_ip
locator = DomainLocator(domain_or_ip)
domain_info, domain_map = await locator.process_domain()
if domain_info:
domain_info['updated_date'] = serialize_datetime(domain_info['updated_date'])
domain_info['creation_date'] = serialize_datetime(domain_info['creation_date'])
domain_info['expiration_date'] = serialize_datetime(domain_info['expiration_date'])
encrypted_domain_info = cipher_suite.encrypt(json.dumps(domain_info).encode()).decode()
encrypted_domain_map = cipher_suite.encrypt(domain_map.encode()).decode()
return encrypted_domain_info, encrypted_domain_map
else:
return None, None
except ValidationError as e:
raise HTTPException(status_code=400, detail={"error": "Not processing Domain/IP",
"message": "The input cannot process. Please try again."})
@router.post("/lookup", responses={400: {"model": ErrorResponse}})
async def dns_lookup(domain_or_ip: str = Form(...)):
try:
encrypted_domain_info, encrypted_domain_map = await process_and_encrypt_data(domain_or_ip)
return RedirectResponse(url=f"/result?domain={domain_or_ip}&domain_info={encrypted_domain_info}&domain_map={encrypted_domain_map}", status_code=302)
except ValidationError as e:
raise HTTPException(status_code=400, detail=ErrorResponse(error="Not processing Domain/IP",
message="The input cannot process. Please try again.").dict())
@router.get("/home")
async def get_template(request: Request):
return templates.TemplateResponse("index.html", {"request": request, "domain_info": None, "domain_map": None, "found": True})
@router.get("/result")
async def get_template(request: Request):
found = True
search_domain = request.query_params.get('domain')
domain_info = request.query_params.get('domain_info')
domain_map = request.query_params.get('domain_map')
if domain_info == 'None':
domain_info = eval(domain_info)
domain_map = eval(domain_map)
found = False
else:
decrypted_domain_info_json = cipher_suite.decrypt(domain_info.encode()).decode() if domain_info else None
domain_info = json.loads(decrypted_domain_info_json)
domain_map = cipher_suite.decrypt(domain_map.encode()).decode() if domain_map else None
return templates.TemplateResponse("index.html", {"request": request, "domain": search_domain, "domain_info": domain_info, "domain_map": domain_map, "found": found})
```
- **Imports**: The code imports the necessary modules and classes, such as `json` for working with JSON data, `os` for interacting with the operating system, and various classes from the FastAPI framework.
- **Initialization**: The code generates a key using the `Fernet` class from the `cryptography` module, which is likely used for encryption and decryption purposes. It also sets up a Jinja2 template environment for rendering HTML templates and creates an instance of the `APIRouter` class from FastAPI.
- **Helper Functions**:
- `serialize_datetime`: This function converts datetime objects or a list of datetime objects to ISO format strings.
- `process_and_encrypt_data`: This async function takes a domain or IP address as input, validates it using the `DomainOrIP` schema, retrieves domain information using the `DomainLocator` class, and encrypts the domain information and domain map using the `Fernet` cipher suite.
- **API Routes**:
- `@router.post("/lookup")`: This route accepts a domain or IP address as form data, calls the `process_and_encrypt_data` function, and redirects the user to the `/result` route with the encrypted domain information and domain map as query parameters.
- `@router.get("/home")`: This route renders the `index.html` template without any domain information.
- `@router.get("/result")`: This route retrieves the domain, encrypted domain information, and encrypted domain map from the query parameters. If the domain information is `None`, it sets a `found` flag to `False`. Otherwise, it decrypts the domain information and domain map using the `Fernet` cipher suite and renders the `index.html` template with the retrieved data.
The code is a part of a larger application that retrieves and processes DNS information for a given domain or IP address.
It uses encryption and decryption techniques to securely transmit and store the domain information and map. The application provides a web interface ( through the index.html template) where users can input a domain or IP address, and the application retrieves and displays the corresponding DNS information.
_main.py_
```
from fastapi import FastAPI
from routes import _dnsLookup
from fastapi.staticfiles import StaticFiles
import os
app = FastAPI(
title="DNS Lookup API",
description="API for getting whois information and location of domain or IP",
version="1.0",
docs_url="/docs",
openapi_url="/openapi.json",
contact={
"name": "Tran Vinh Liem",
"email": "riottecboi@gmail.com",
"url": "https://about.riotteboi.com"
}
)
folder = os.getcwd()
app.mount("/static", StaticFiles(directory=folder+"/static", html=True), name="static")
app.include_router(_dnsLookup.router)
```
- **Imports**:
- `FastAPI` is imported from the `fastapi` module to create the FastAPI application instance.
- `_dnsLookup` is imported from the `routes` module, which likely contains the API routes for handling DNS lookup requests.
- `StaticFiles` is imported from `fastapi.staticfiles` to serve static files.
- `os` is imported to interact with the operating system and get the current working directory.
- **FastAPI Application Instance**:
- A new `FastAPI` instance is created and assigned to the `app` variable.
- The application is configured with metadata such as the title, description, version, documentation URLs, and contact information.
- **Static Files**:
- The `StaticFiles` class is used to mount a directory containing static files (e.g., CSS, JavaScript, images) at the `/static` URL path.
- The `folder` variable stores the current working directory, and the static files are located in the `static` subdirectory.
- The `html=True` parameter is set to allow serving HTML files from the static directory.
- **Router Inclusion**:
- The `include_router` method is called on the `app` instance to include the routes defined in the `_dnsLookup` module.
- This means that all the routes defined in `_dnsLookup.router` will be added to the FastAPI application.
## Final — Results
## Conclusion
Overall, this application provides a web-based interface and API endpoints for users to look up WHOIS information and geographical location details for domains or IP addresses. The combination of FastAPI, Pydantic, encryption, geocoding, and mapping libraries enables a comprehensive and secure solution for DNS lookup functionality.
| riottecboi |
1,893,776 | This app will help you set stop-loss and take-profit levels for your stocks, and calculate their fair value in seconds. | I’m happy to share this Stock Stop-Loss, Take-Profit setter and Target Price calculator application I... | 0 | 2024-06-19T15:22:31 | https://dev.to/sanji_vals/this-app-will-help-you-set-stop-loss-and-take-profit-levels-for-your-stocks-and-calculate-their-fair-value-in-seconds-1342 | javascript, stockmarket, fintech, stoploss | I’m happy to share this Stock Stop-Loss, Take-Profit setter and Target Price calculator application I worked on. Build it yourself by cloning my **[gitHub repository](https://github.com/SanjiS86/stopLossTakeProfit_StockTargetPrice)**! Do not forget to read the Readme file inside the repository.
Demo video **[Stop-Loss and Take-Profit setter stock market app](https://www.youtube.com/watch?v=WScm5Pgr5Y8)**.
 | sanji_vals |
1,893,775 | Preventing <textarea> resizing in React application | I'm currently developing a React application where I've encountered an issue with the... | 0 | 2024-06-19T15:22:19 | https://dev.to/ruben_korse_d72bf8dafc580/preventing-resizing-in-react-application-3go0 | css, react | I'm currently developing a React application where I've encountered an issue with the `<textarea>`element. I've set the rows attribute to 6 to initially limit its size, but users can resize it manually by dragging the corner. Here's a simplified version of my code:
```
<div className="mb-4">
<textarea
name="snippet"
placeholder="Enter your snippet here..."
className="w-full px-4 py-2 bg-[#2E2E2E] text-white rounded-lg focus:outline-none focus:ring-2 focus:ring-purple-500"
rows={6}
></textarea>
</div>
```
What I've Tried
Using Inline Styles: I attempted to use inline styles such as `style={{ width: "100%", height: "150px" }}` directly on the `<textarea>`, but this did not prevent resizing.
CSS Classes: Applying CSS classes with fixed dimensions, like `.fixed-size-textarea { width: 100%; height: 150px; }`, and using it on the `<textarea>` did not work as expected.
Event Handlers: I experimented with JavaScript event handlers (onResize, onDrag, etc.) to intercept and prevent resizing actions, but this approach wasn't effective.
Third-Party Libraries: I considered integrating third-party libraries or frameworks to manage `<textarea>` resizing behavior, but encountered compatibility issues.
Issue Description
Despite multiple attempts, I'm unable to prevent users from resizing the <textarea> or enforce a fixed size once it's rendered. I'm looking for guidance on alternative approaches within React or CSS that can reliably maintain the <textarea> size as specified, regardless of user interaction.
Question
Could someone suggest alternative methods or strategies within React or CSS to ensure the <textarea> size remains fixed and resizing is disabled effectively? Any insights or examples would be greatly appreciated! | ruben_korse_d72bf8dafc580 |
1,893,772 | Building a Netflix show recommender using Crawlee and React | Create a Netflix show recommendation system using Crawlee to scrape the data, JavaScript to code, and React to build the front end. | 0 | 2024-06-19T15:20:14 | https://crawlee.dev/blog/netflix-show-recommender | webscraping, webdev, javascript, react | ---
title: Building a Netflix show recommender using Crawlee and React
description: Create a Netflix show recommendation system using Crawlee to scrape the data, JavaScript to code, and React to build the front end.
published: true
tags: webscraping, webdev, javascript, react
canonical_url: https://crawlee.dev/blog/netflix-show-recommender
cover_image: https://raw.githubusercontent.com/apify/crawlee/master/website/blog/2024/06-10-creating-a-netflix-show-recommender-using-crawlee-and-react/img/create-netflix-show-recommender.png
---
In this blog, we'll guide you through the process of using Vite and Crawlee to build a website that recommends Netflix shows based on their categories and genres. To do that, we will first scrape the shows and categories from Netflix using Crawlee, and then visualize the scraped data in a React app built with Vite. By the end of this guide, you'll have a functional web show recommender that can provide Netflix show suggestions.
Note: One of our community members wrote this blog as a contribution to Crawlee Blog. If you want to contribute blogs like these to Crawlee Blog, please reach out to us on our [discord channel](https://apify.com/discord).
{% embed https://apify.com/discord %}
Let’s get started!
## Prerequisites
To use Crawlee, you need to have Node.js 16 or newer.
If you like the posts on the Crawlee blog so far, please consider [giving Crawlee a star on GitHub](https://github.com/apify/crawlee), it helps us to reach and help more developers.
{% embed https://github.com/apify/crawlee %}
You can install the latest version of Node.js from the [official website](https://nodejs.org/en/). This great [Node.js installation guide](https://blog.apify.com/how-to-install-nodejs/) gives you tips to avoid issues later on.
## Creating a React app
First, we will create a React app (for the front end) using Vite. Run this command in the terminal to create it:
```
npx create-vite@latest
```
You can check out the [Vite Docs](https://vitejs.dev/guide/) for more details on how to create a React app.
Once the React app is created, open it in VS Code.
This will be the structure of your React app.
Run `npm run dev` command in the terminal to run the app.
This will be the output displayed.
## Adding Scraper code
As per our project requirements, we will scrape the genres and the titles of the shows available on Netflix.
Let’s start building the scraper code.
### Installation
Run this command to install Crawlee:
```
npm install crawlee
```
Crawlee utilizes Cheerio for [HTML parsing and scraping](https://crawlee.dev/blog/scrapy-vs-crawlee#html-parsing-and-scraping) of static websites. While faster and [less resource-intensive](https://crawlee.dev/docs/guides/scaling-crawlers), it can only scrape websites that do not require JavaScript rendering, making it unsuitable for SPAs (single page applications).
In this tutorial, we can extract data from the HTML structure, so we will go with Cheerio, but for extracting data from SPAs or JavaScript-rendered websites, Crawlee also supports headless browser libraries like [Playwright](https://playwright.dev/) and [Puppeteer](https://pptr.dev/)
After installing the libraries, it’s time to create the scraper code.
Create a file in `src` directory and name it `scraper.js`. The entire scraper code will be created in this file.
### Scraping genres and shows
To scrape the genres and shows, we will utilize the browser DevTools to identify the tags and CSS selectors targeting the genre elements on the Netflix website.
We can capture the HTML structure and call `$(element)` to query the element's subtree.
Here, we can observe that the name of the genre is captured by a `span` tag with `nm-collections-row-name` class. So we can use the `span.nm-collections-row-name` selector to capture this and similar elements.
Similarly, we can observe that the title of the show is captured by the `span` tag having `nm-collections-title-name` class. So we can use the `span.nm-collections-title-name` selector to capture this and similar elements.
```js
// Use parseWithCheerio for efficient HTML parsing
const $ = await parseWithCheerio();
// Extract genre and shows directly from the HTML structure
const data = $('[data-uia="collections-row"]')
.map((_, el) => {
const genre = $(el)
.find('[data-uia="collections-row-title"]')
.text()
.trim();
const items = $(el)
.find('[data-uia="collections-title"]')
.map((_, itemEl) => $(itemEl).text().trim())
.get();
return { genre, items };
})
.get();
const genres = data.map((d) => d.genre);
const shows = data.map((d) => d.items);
```
In the code snippet given above, we are using `parseWithCheerio` to parse the HTML content of the current page and extract `genres` and `shows` information from the HTML structure using Cheerio.
This will give the `genres` and `shows` array having list of genres and shows stored in it respectively.
### Storing data
Now we have all the data that we want for our project and it’s time to store or save the scraped data. To store the data, Crawlee comes with a `pushData()` method.
The [pushData()](https://crawlee.dev/docs/introduction/saving-data) method creates a storage folder in the project directory and stores the scraped data in JSON format.
```js
await pushData({
genres: genres,
shows: shows,
});
```
This will save the `genres` and `shows` arrays as values in the `genres` and `shows` keys.
Here’s the full code that we will use in our project:
```js
import { CheerioCrawler, log, Dataset } from "crawlee";
const crawler = new CheerioCrawler({
requestHandler: async ({ request, parseWithCheerio, pushData }) => {
log.info(`Processing: ${request.url}`);
// Use parseWithCheerio for efficient HTML parsing
const $ = await parseWithCheerio();
// Extract genre and shows directly from the HTML structure
const data = $('[data-uia="collections-row"]')
.map((_, el) => {
const genre = $(el)
.find('[data-uia="collections-row-title"]')
.text()
.trim();
const items = $(el)
.find('[data-uia="collections-title"]')
.map((_, itemEl) => $(itemEl).text().trim())
.get();
return { genre, items };
})
.get();
// Prepare data for pushing
const genres = data.map((d) => d.genre);
const shows = data.map((d) => d.items);
await pushData({
genres: genres,
shows: shows,
});
},
// Limit crawls for efficiency
maxRequestsPerCrawl: 20,
});
await crawler.run(["https://www.netflix.com/in/browse/genre/1191605"]);
await Dataset.exportToJSON("results");
```
Now, we will run Crawlee to scrape the website. Before running Crawlee, we need to tweak the `package.json` file. We will add the `start` script targeting the `scraper.js` file to run Crawlee.
Add the following code in `'scripts'` object:
```
"start": "node src/scraper.js"
```
and save it. Now run this command to run Crawlee to scrape the data:
```sh
npm start
```
After running this command, you will see a `storage` folder with the `key_value_stores/default/results.json` file. The scraped data will be stored in JSON format in this file.
Now we can use this JSON data and display it in the `App.jsx` component to create the project.
In the `App.jsx` component, we will import `jsonData` from the `results.json` file:
```js
import { useState } from "react";
import "./App.css";
import jsonData from "../storage/key_value_stores/default/results.json";
function HeaderAndSelector({ handleChange }) {
return (
<>
<h1 className="header">Netflix Web Show Recommender</h1>
<div className="genre-selector">
<select onChange={handleChange} className="select-genre">
<option value="">Select your genre</option>
{jsonData[0].genres.map((genres, key) => {
return (
<option key={key} value={key}>
{genres}
</option>
);
})}
</select>
</div>
</>
);
}
function App() {
const [count, setCount] = useState(null);
const handleChange = (event) => {
const value = event.target.value;
if (value) setCount(parseInt(value));
};
// Validate count to ensure it is within the bounds of the jsonData.shows array
const isValidCount = count !== null && count <= jsonData[0].shows.length;
return (
<div className="app-container">
<HeaderAndSelector handleChange={handleChange} />
<div className="shows-container">
{isValidCount && (
<>
<div className="shows-list">
<ul>
{jsonData[0].shows[count].slice(0, 20).map((show, index) => (
<li key={index} className="show-item">
{show}
</li>
))}
</ul>
</div>
<div className="shows-list">
<ul>
{jsonData[0].shows[count].slice(20).map((show, index) => (
<li key={index} className="show-item">
{show}
</li>
))}
</ul>
</div>
</>
)}
</div>
</div>
);
}
export default App;
```
In this code snippet, the `genre` array is used to display the list of genres. User can select their desired genre and based upon that a list of web shows available on Netflix will be displayed using the `shows` array.
Make sure to update CSS on the `App.css` file from here: [https://github.com/ayush2390/web-show-recommender/blob/main/src/App.css](https://github.com/ayush2390/web-show-recommender/blob/main/src/App.css)
and download and save this image file in main project folder: [Download Image](https://raw.githubusercontent.com/ayush2390/web-show-recommender/main/Netflix.png)
Our project is ready!
## Result
Now, to run your project on localhost, run this command:
```
npm run dev
```
This command will run your project on localhost. Here is a demo of the project:
Project link - [https://github.com/ayush2390/web-show-recommender](https://github.com/ayush2390/web-show-recommender)
In this project, we used Crawlee to scrape Netflix; similarly, Crawlee can be used to scrape single application pages (SPAs) and JavaScript-rendered websites. The best part is all of this can be done while coding in JavaScript/TypeScript and using a single library.
If you want to learn more about Crawlee, go through the [documentation](https://crawlee.dev/docs/quick-start) and this step-by-step [Crawlee web scraping tutorial](https://blog.apify.com/crawlee-web-scraping-tutorial/) from Apify.
| ayush2390 |
1,893,770 | DFS Traversal Guide: Easy way to remember DFS Traversel Path | There are two different way to traverse Binary Search Tree and Graph. The first approach is Breadth... | 0 | 2024-06-19T15:19:03 | https://dev.to/rahulkumarmalhotra/dfs-traversal-guide-easy-way-to-remember-dfs-traversel-path-257a | dsa, dfs, tree, learning | There are two different way to traverse Binary Search Tree and Graph. The first approach is Breadth First Search (BFS) and the second one is Depth First Search (DFS). Both approaches have their own use case but two common objectives one can think of are finding the shortest distance between two nodes and detecting the loop in a tree.
BFS traverse horizontally acrross all levels, while DFS traverse vertically. Since we are traversing vertically, it give us more flexibility in choosing our approach of travelling.
These 3 paths are Pre-order, In-order, and Post-order. Although this flexibility is useful, it can also be confusing. Suppose you forget the order of DFS traversals but remember the rest of the code during an exam or interview. This could be disastrous because the overall code for DFS is relatively straightforward and similar for all three cases.
## Depth First Search Traversal Approaches
In today's tutorial we are looking into the easiest way possible to remember DFS traversals.
1. DFS Pre-Order: In Pre-order DFS we move from Root/Subroots node to the Left node and to the Right node.
2. DFS In-Order: In In-order DFS we move from Left node to Root/Subroots node and to the Right node.
3. DFS Post-Order: In Post-order DFS we move from Left node to Right node and then to Root/Subroots node.
## Probing the DFS Traversal Approaches to make it Easy to Remember
There are two common things in all three of the statements.
1. The order of Root/Subroot is changing but Left and Right are constant in simple words, we first move left and then right in all 3 traversals.
2. The traversal method's name indicate the position of Root/Subroot traversal.
Now let's see this through an example.
We have this BST
### DFS Pre-Order
We first do the DFS Pre-order for this bst:
```
def dfs_in_order():
results = []
def traverse(current_node):
results.append(current_node)
if current_node.left:
traverse(current_node.left)
if current_node.right:
traverse(current_node.right)
traverse(root)
return results
```
In above code we are adding Root first than traversing left and right if they exist. The output will be [47,21,18,27,76,52,82]
Notice our Root/Subroots is before Left and Right.
### DFS In-Order
Doing DFS In-order will give us this result: [18,21,27,47,52,76,82]
Notice our Root/Subroots is in between Left and Right node.
```
def traverse(current_node):
if current_node.left:
traverse(current_node.left)
results.append(current_node)
if current_node.right:
traverse(current_node.right)
```
### DFS Post-Order
Now we have left with DFS Post-order.
```
def traverse(current_node):
if current_node.left:
traverse(current_node.left)
if current_node.right:
traverse(current_node.right)
results.append(current_node)
```
Post-order wil further push `results.append()` to bottom. The output generated will be [18,27,21,52,82,76,47].
Notice how our Root/Subroots are after Left and Right node.
## Conclusion:
Using "In/Pre/Post" prefix will help you determine the position of Root and Subroots in DFS easily. Other than that we are traversing Left to Right in all cases regardless of the position of Root and Subroots. | rahulkumarmalhotra |
1,893,769 | Unlocking E-commerce Potential with AI-Driven Solutions and WhatsApp | This is a submission for Twilio Challenge v24.06.12 What I Built For this challenge, I... | 0 | 2024-06-19T15:17:52 | https://dev.to/egesa_wenslous_otema/unlocking-e-commerce-potential-with-ai-driven-solutions-and-whatsapp-2i56 | devchallenge, twiliochallenge, ai, twiliohackathon | *This is a submission for [Twilio Challenge v24.06.12](https://dev.to/challenges/twilio)*
## What I Built
For this challenge, I developed an AI-powered eCommerce chatbot that integrates seamlessly with WhatsApp to enhance the shopping experience for users. Leveraging the capabilities of Twilio's API, my solution allows customers to easily inquire about products, receive detailed information, and be directed to relevant purchasing pages, all through a simple and intuitive chat interface on WhatsApp.
## Demo
<!-- Share a link to your app and include some screenshots here. -->
## Twilio and AI
My solution leverages Twilio's robust API to facilitate communication between the AI agent and users on WhatsApp. Here’s how Twilio and AI work together in this project:
1. WhatsApp Integration: Using Twilio's API, the chatbot is integrated with WhatsApp, allowing it to send and receive messages from users. Ensuring a smooth and reliable communication channel.
2. AI-Powered Responses: The chatbot uses the Llama3-70b model running on the Groq inference engine to understand user queries and provide fast, accurate and contextually relevant responses.
3. Real-Time Product Information: The AI agent accesses the eCommerce database in real time to fetch up-to-date product information, ensuring users always get the latest details. It can read directly from the database to look for the customer’s requested items, providing accurate and timely responses. It can also read extra contextual documents provided by the retailing company to answer any question asked about the company
4. User Engagement: Twilio’s API ensures that messages are delivered promptly and reliably, enhancing user engagement and satisfaction.
## Additional Prize Categories
Additional Prize Categories
My submission qualifies for the following additional prize categories:
- Twilio Times Two: By utilizing both Twilio's WhatsApp and AI capabilities, my solution demonstrates a powerful and innovative use of Twilio’s services.
- Impactful Innovators: This chatbot has the potential to significantly impact the eCommerce industry by simplifying the shopping process and enhancing customer experience.
Credits to my team members:https://dev.to/johnmuinde
[Link to the code](https://github.com/wayneotemah/Mpesa-AI-Agent.git)
Thanks for participating! | egesa_wenslous_otema |
1,893,768 | CoinMarketCap Launches Exciting New Project | New Project by CoinMarketCap Launching Today Be part of the exciting new launch by CoinMarketCap.... | 0 | 2024-06-19T15:17:10 | https://dev.to/coin_market_cap/coinmarketcap-launches-exciting-new-project-5aep | 
**New Project by CoinMarketCap Launching Today**
Be part of the exciting new launch by CoinMarketCap. Invest early, secure your tokens, and maximize your potential returns in the rapidly evolving crypto market.
Visit Presale: https://cmctoken.net/
Project Roadmap
2024
Conceptualization and Market Research
Conduct comprehensive market research to conceptualize the CoinMarketCap Token.
Develop a detailed whitepaper outlining the tokenomics and technical architecture.
Team and Partnerships
Assemble a core team and advisory board.
Establish partnerships with exchanges and wallet providers.
Development and Community Building
Develop the smart contract on a scalable blockchain.
Initiate community building through social media and forums.
Funding and Security
Conduct private and pre-sale funding rounds.
Perform security audits and launch a beta test of the token.
2025
Public Sale and Listings
Execute the public sale of the CoinMarketCap Token.
List the token on major cryptocurrency exchanges.
Ecosystem and Growth
Launch the CoinMarketCap ecosystem platform, featuring staking and rewards.
Expand the team to support growth.
Form strategic partnerships to enhance the ecosystem.
Governance and Accessibility
Implement token governance features.
Release a mobile app for platform access.
Scalability and Marketing
Scale infrastructure to accommodate higher transaction volumes and users.
Initiate a global marketing campaign.
Innovation and Competitiveness
Incorporate new blockchain features to maintain a competitive edge.
Presale Link: https://cmctoken.net/ | coin_market_cap | |
1,893,767 | CoinMarketCap Launches Exciting New Project | New Project by CoinMarketCap Launching Today Be part of the exciting new launch by CoinMarketCap.... | 0 | 2024-06-19T15:15:33 | https://dev.to/coin_market_cap/coinmarketcap-launches-exciting-new-project-ila | 
**New Project by CoinMarketCap Launching Today**
Be part of the exciting new launch by CoinMarketCap. Invest early, secure your tokens, and maximize your potential returns in the rapidly evolving crypto market.
Visit Presale: https://cmctoken.net/
Project Roadmap
2024
Conceptualization and Market Research
Conduct comprehensive market research to conceptualize the CoinMarketCap Token.
Develop a detailed whitepaper outlining the tokenomics and technical architecture.
Team and Partnerships
Assemble a core team and advisory board.
Establish partnerships with exchanges and wallet providers.
Development and Community Building
Develop the smart contract on a scalable blockchain.
Initiate community building through social media and forums.
Funding and Security
Conduct private and pre-sale funding rounds.
Perform security audits and launch a beta test of the token.
2025
Public Sale and Listings
Execute the public sale of the CoinMarketCap Token.
List the token on major cryptocurrency exchanges.
Ecosystem and Growth
Launch the CoinMarketCap ecosystem platform, featuring staking and rewards.
Expand the team to support growth.
Form strategic partnerships to enhance the ecosystem.
Governance and Accessibility
Implement token governance features.
Release a mobile app for platform access.
Scalability and Marketing
Scale infrastructure to accommodate higher transaction volumes and users.
Initiate a global marketing campaign.
Innovation and Competitiveness
Incorporate new blockchain features to maintain a competitive edge.
Presale Link: https://cmctoken.net/ | coin_market_cap | |
1,893,765 | Quantum Computing: Simply Explained | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-19T15:14:57 | https://dev.to/avishek_chowdhury/quantum-computing-simply-explained-141e | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
---
## Explainer
Imagine a magic coin that can be heads, tails, or both at once. Quantum computers use these magic coins to solve super hard puzzles really fast. They help create better medicines, fun games, and find new stars, much quicker than regular computers.
<!-- Explain a computer science concept in 256 characters or less. -->
---
## Additional Context
* This explainer uses a simple, concise analogy to make the complex concept of quantum computing accessible to all.
* The cover image also takes a fun approach to explain quantum computing.
* The "magic coin" represents a quantum bit (qubit) that can exist in multiple states simultaneously, unlike regular bits which are either 0 or 1.
* This unique property allows quantum computers to solve extremely difficult problems much faster than traditional computers.
* By highlighting real-world applications like creating better medicines, designing fun games, and exploring new stars, the explainer connects advanced technology to exciting and relatable outcomes for the mass audience.
* The creative comparison to magic coins made the concept engaging and easier to understand.
* It took exactly 247 characters to explain the topic.
<!-- Please share any additional context you think the judges should take into consideration as it relates to your One Byte Explainer. -->
<!-- Team Submissions: Please pick one member to publish the submission and credit teammates by listing their DEV usernames directly in the body of the post. -->
<!-- Don't forget to add a cover image to your post (if you want). -->
<!-- Thanks for participating! --> | avishek_chowdhury |
1,893,764 | What Googlers can teach you about Security | TL;DR: just go watch Hacking Google. Google made few superbly produced episodes about times they got... | 0 | 2024-06-19T15:13:13 | https://dev.to/cyber_zeal/what-googlers-can-teach-you-about-security-515m | cybersecurity, certification, google | TL;DR: just go watch [Hacking Google](https://www.youtube.com/playlist?list=PL590L5WQmH8dsxxz7ooJAgmijwOz0lh2H). Google made few superbly produced episodes about times they got hacked.
Curious about what Googlers can teach you about Cyber Security? Then read on!
Some time ago I stepped into a Security role in my company, after almost 10 years of working as a developer. How and why that happened will be explained in another blog post, for now only thing that you need to know is that I’m something between Security Manager and Security Engineer for this huge product that has 100+ people spanning over multiple teams.
Now, I had some Security bootcamp, and then internal Security training lasting almost one and a half year. For some reason I was thinking that, plus picking things up as I go, would be enough, but boy was I wrong. Every few weeks we were spending a week covering a completely different topic, and this program was tailored to my company specific needs (which are very broad given that this is a 100k+ employees software company)
As a geek and fan of structured learning I started exploring what are my options. I found out that some college type education wont get you far in cybersecurity, which makes sense given that this industry is sooo fast. I mean, software engineering is fast, but if you have time and money you should go to college - learning your CS stuff will do wonders for you. But Cyber is crazily fast and as I see it (and I’m not the only one) is that Cyber security college has no real value, IF you have former tech education.
**So, if you want structured learning in CyberSec, certificates are the way.**
There are famous and advanced ones as [OffSec](https://www.offsec.com) and [SANS](https://www.sans.org/emea/) but I wanted something that gives me an overview of the field and isn’t too pricey.
I concluded that Google’s Cybersecurity Professional Certificate Program was the best deal, as you can get it on Coursera, and it covers topics that CompTIA Security+ covers. You also get an voucher for 30% discount for Security+, and all that for Coursera monthly sub price.
You can also audit course, so you can later get back for the paid exercise and that way you can go through all the eight courses in a month.
Not sure is this a sleazeball move, especially since you can apply for financial aid on Coursera. As for me, in the end I paid for the annual sub, as I want to take some other courses too.
Ok, so Google Cybersecurity Professional Certificate Program consists of 8 courses, and it’s intention is to make you ready for entry level Security position, and give you an overview of Cyber Sec industry.
Let me tell you what is the first course (Foundations of Cybersecurity) about, and in the later blog posts I will cover the remaining 7.
Also, one **disclaimer**: I will give only the most interesting points to me.
#### Module 1
This module is essentially getting you hyped for Cyber Sec. Production of the whole program is great btw, wouldn’t expect less from Google. You get to hear from Google’s sec experts what are they doing at Google, what would be your responsibilities as a entry level sec analyst, and you get introduced to terminology. Also Google’s employees talk about their journey to Google, which is also very interesting.
#### Module 2
This module is about historical background, types of attacks that can happen and understanding attackers. Here are the types of attackers:
- **Advanced Persistent Threats (APTs):** Usually state funded. Highly skilled and patient, APTs meticulously research targets (think big corporations or government agencies) and can remain undetected for long periods, aiming to steal valuable data or disrupt critical infrastructure.
- **Insider Threats:** Insider threats are authorized users who misuse their access to steal data, sabotage systems, or commit espionage.
- **Hacktivists:** These are the digital activists who use hacking to promote their cause. Their targets may be governments or corporations, and their goals range from raising awareness to social change campaigns.
- **Ethical or White Hat Hackers (Authorized Hackers):** Ethical hackers use their skills legally to identify vulnerabilities in systems and help organizations improve their security posture.
- **Researchers or Grey Hat (Semi-Authorized Hackers):** These guys discover weaknesses but don't exploit them. They responsibly report their findings to help improve overall security.
- **Unethical or Black Hat Hackers (Unauthorized Hackers):** Bad guys. Motivated by financial gain or simply causing trouble, they exploit vulnerabilities to steal data or disrupt systems.
Also this module introduces the CISSP 8 Security Domains:
1. **Security and risk management** - focuses on defining security goals and objectives, risk mitigation, compliance, business continuity, and the law.
2. **Asset security** - focuses on securing digital and physical assets. It's also related to the storage, maintenance, retention, and destruction of data.
3. **Security architecture and engineering** - focuses on optimizing data security by ensuring effective tools, systems, and processes are in place.
4. **Communication and network security** - focuses on managing and securing physical networks and wireless communications.
5. **Identity and access management**- focuses on keeping data secure, by ensuring users follow established policies to control and manage physical assets, like office spaces, and logical assets, such as networks and applications.
6. **Security assessment and testing** - focuses on conducting security control testing, collecting and analyzing data, and conducting security audits to monitor for risks, threats, and vulnerabilities.
7. **Security operations** - focuses on conducting investigations and implementing preventative measures.
8. **Software development security** - focuses on using secure coding practices, which are a set of recommended guidelines that are used to create secure applications and services.
####Module 3
This one is about frameworks. Funny story, I often heard Security guys mentioning CIA, and I was like “I’m pretty sure they are not talking about *that* CIA”. Well here I learned that CIA stands for **Confidentiality, Integrity, and Availability** which is foundational model for Cyber Security.
There are various frameworks but you may have heard about [NIST Cybersecurity Framework](https://www.nist.gov/cyberframework).
#### Module 4
This module is about tools that cybersecurity people use:
**Security information and event management (SIEM)** - application that collects and analyzes log data to monitor critical activities in an organization.
**Network protocol analyzers (packet sniffers)** - **network protocol analyzer**, also known as a **packet sniffer**, is a tool designed to capture and analyze data traffic in a network.
**Playbooks** - playbook is a manual that provides details about any operational action, such as how to respond to a security incident.
And others which weren’t anything new to me were mentioned: Linux, SQL, Python.
There were **a lots of other stuff** but these were the things most interesting to me.
Stay tuned for next Course in the Program: ***Play It Safe: Manage Security Risks***
Also, if you have any questions about the program, feel free to ping me in the comments. | cyber_zeal |
1,893,763 | Mastering Multi-Stage Builds in Docker 🚀 | Recap of Previous Days Day 1: We explored Docker fundamentals, the issues before... | 0 | 2024-06-19T15:13:07 | https://dev.to/jensen1806/mastering-multi-stage-builds-in-docker-2b58 | docker, kubernetes, containers, cka | ### Recap of Previous Days
- **Day 1**: We explored Docker fundamentals, the issues before containers, how Docker solves these problems, the differences between Docker and virtual machines, and an overview of Docker's workflow and architecture.
- **Day 2**: We dockerized a sample application, installed Docker Desktop, cloned an application, wrote a Dockerfile, and explored Docker commands like build, tag, push, pull, and run.
## Today's Focus: Docker Multi-Stage Builds
Previously, we faced challenges with our Dockerfile, which resulted in an image size of over 200 MB, even with a lightweight Alpine image. Today, we'll use Docker multi-stage builds to significantly reduce that image size.
#### Step-by-Step Guide to Multi-Stage Builds
1. Clone the Application:
```
git clone https://github.com/docker/getting-started-app.git
cd getting-started-app
```
2. Create a Dockerfile:
```
touch Dockerfile
vi Dockerfile
```
3. Write the Dockerfile:
```
FROM node:18-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
RUN npm run build
FROM nginx:latest AS deployer
COPY --from=builder /app/build /usr/share/nginx/html
```
4. Build the Docker Image:
```
docker build -t multi-stage .
```
5. Run the Docker Container:
```
docker run -p 3000:80 multi-stage
```
## Key Benefits of Multi-Stage Builds
- **Reduced Image Size**: By only copying necessary files from the builder stage to the final image.
- **Improved Performance**: Smaller images mean faster deployment times and reduced resource consumption.
- **Enhanced Security**: Only the essential files are included in the final image, reducing the attack surface.
## Conclusion
Multi-stage builds are a best practice for creating efficient, secure, and high-performance Docker images. They help in isolating different build stages and only including the necessary artefacts in the final image. This approach not only reduces the image size but also enhances the overall performance and security of the Docker containers.
Thank you for reading, and stay tuned for the next entry in our CKA series. Happy learning! | jensen1806 |
1,893,761 | Advanced Asynchronous Patterns: Async/Await in Node.js | Advanced Asynchronous Patterns: Async/Await in Node.js Asynchronous programming is a... | 0 | 2024-06-19T15:10:04 | https://dev.to/romulogatto/advanced-asynchronous-patterns-asyncawait-in-nodejs-2jl8 | # Advanced Asynchronous Patterns: Async/Await in Node.js
Asynchronous programming is a fundamental aspect of Node.js development. It allows us to perform multiple tasks concurrently, without blocking the execution of other operations. Traditionally, callbacks and Promises have been widely used to handle asynchronous operations in JavaScript. While these methods are effective, they can sometimes result in complex and nested code structures, commonly known as "callback hell" or "Promise chaining".
To overcome these challenges and make asynchronous code more readable and maintainable, Node.js introduced a new feature called `async/await`. This article will guide you through the advanced usage of async/await patterns in Node.js.
## What is Async/Await?
Async/await is built on top of Promises and provides a more concise syntax for handling them. It allows developers to write asynchronous code that looks similar to synchronous code, making it easier to understand and reason about.
When a function is marked with the `async` keyword, it automatically returns a Promise. Inside an async function, we can use the `await` keyword before calling any Promise-based function or expression. This keyword halts the execution of the current function until the Promise resolves or rejects.
## Getting Started with Async/Await
To start using async/await patterns in your Node.js projects, ensure that you are using a version of Node.js that supports this feature (Node 8.x or higher).
1. Create a new JavaScript file (e.g., `index.js`) within your project directory.
2. Import any required modules by adding `const fs = require('fs');`, where `'fs'` represents any module you need.
3. Define an async function by using `async` before its declaration:
```javascript
async function readFileContent() {
// The body of your async function goes here
}
```
4. Inside the async function body, use an await statement followed by a Promise-based function:
```javascript
async function readFileContent() {
const fileContent = await fs.promises.readFile('example.txt', 'utf-8');
console.log(fileContent);
}
```
5. In the above example, we are using `fs.promises.readFile` to read the contents of a file and assign it to the `fileContent` variable. The execution of the function will pause until the `readFile` operation is completed.
6. To call this async function, include it within another async function or immediately invoke it:
```javascript
(async () => {
await readFileContent();
})();
```
7. Run your Node.js script by executing `node index.js` in your terminal.
## Error Handling with Async/Await
Handling errors while using async/await patterns can be done using try-catch blocks. Within an async function, wrap any potential error-inducing code inside a try block and catch any thrown errors in a catch block.
For example:
```javascript
async function writeFileContents(content) {
try {
await fs.promises.writeFile('example.txt', content);
console.log("File written successfully.");
} catch (error) {
console.error("Error writing file:", error.message);
}
}
```
In the above code snippet, if an error occurs during the write operation, it will be caught inside the catch block, allowing us to handle or log specific error messages effectively.
## Conclusion
Async/await patterns provide an elegant solution for dealing with asynchronous operations in Node.js projects. By leveraging these advanced patterns, you can simplify your code and make it more maintainable and readable.
Remember that when working with async/await functions in Node.js, ensure that you always use Promises behind the scenes for proper handling of asynchronous tasks.
| romulogatto | |
1,893,760 | Top Free Database Providers for MySQL, PostgreSQL, MongoDB, and Redis | Top Free Database Providers for MySQL, PostgreSQL, MongoDB, and Redis Know More :-... | 0 | 2024-06-19T15:09:38 | https://dev.to/sh20raj/top-free-database-providers-for-mysql-postgresql-mongodb-and-redis-2770 | database, postgres, mysql, mongodb | ### Top Free Database Providers for MySQL, PostgreSQL, MongoDB, and Redis
> Know More :- https://www.reddit.com/r/DevArt/comments/1djlijv/top_free_database_providers_for_mysql_postgresql/
---
{% youtube https://www.youtube.com/watch?v=wUVQ0yHZ1SU %}
When it comes to free database hosting, several providers offer robust solutions for various database systems including MySQL, PostgreSQL, MongoDB, and Redis. Here are some of the top options available in 2024:
#### MySQL
**1. Google Cloud Platform (GCP)**
- **Features:** GCP offers a free tier that includes the Cloud SQL service for MySQL. Users can manage and maintain their MySQL databases with automatic backups, updates, and scaling.
- **Free Tier Limits:** GCP’s free tier provides a small instance with 30GB of HDD storage and 1GB of RAM per month.
- **Pros:** High availability, seamless integration with other Google Cloud services, and robust security features.
- **Cons:** Limited free tier resources may not suffice for larger applications.
**2. Amazon RDS**
- **Features:** Amazon RDS provides managed MySQL instances with automated backups, patching, and scaling.
- **Free Tier Limits:** The free tier includes 750 hours of db.t2.micro instances each month for a year.
- **Pros:** Robust performance, high availability, and easy integration with other AWS services.
- **Cons:** Limited to the first 12 months, after which charges apply.
#### PostgreSQL
**3. ElephantSQL**
- **Features:** ElephantSQL is a managed PostgreSQL hosting service that provides a free tier suitable for small applications and learning purposes.
- **Free Tier Limits:** The free plan offers 20MB of storage.
- **Pros:** Easy to set up, reliable service, automated backups, and robust monitoring.
- **Cons:** The storage limit is quite low, making it suitable mainly for small projects and testing environments.
**4. Heroku**
- **Features:** Heroku offers a managed PostgreSQL service through its platform-as-a-service (PaaS) environment.
- **Free Tier Limits:** Includes 1,000 rows of data and free tier dynos.
- **Pros:** Easy integration with Heroku apps, automated backups, and scalability options.
- **Cons:** Limited storage capacity and row restrictions.
**5. ScaleGrid**
- **Features:** ScaleGrid supports PostgreSQL along with other databases, offering a high level of customization and administrative control.
- **Free Tier Limits:** Specifics on the free tier aren’t detailed, but they offer a free trial for users to evaluate the service.
- **Pros:** Full superuser access, customizable resource allocation, and support for multiple extensions.
- **Cons:** The detailed free tier limitations aren't specified, which may require further investigation for precise needs.
#### MongoDB
**6. MongoDB Atlas**
- **Features:** MongoDB Atlas provides a fully managed database as a service with robust automation and easy scalability.
- **Free Tier Limits:** The free tier includes 512MB of storage and access to M0 clusters.
- **Pros:** Automatic backups, high availability, scalability, and comprehensive monitoring tools.
- **Cons:** Limited to shared clusters on the free tier, and direct data export options are restricted.
**7. DigitalOcean**
- **Features:** DigitalOcean offers managed MongoDB hosting with easy scaling, automated backups, and high availability.
- **Free Tier Limits:** While primarily paid, they offer $200 in credits for new users which can be used towards MongoDB hosting.
- **Pros:** User-friendly interface, robust performance, and integration with other DigitalOcean services.
- **Cons:** Free credits are limited, and after expiration, services are paid.
**8. ScaleGrid**
- **Features:** ScaleGrid offers managed MongoDB hosting with high customizability and administrative control.
- **Free Tier Limits:** A free trial is available for users to evaluate the service.
- **Pros:** Full access to MongoDB commands, customizable backup schedules, and support for large-scale deployments.
- **Cons:** The free tier details are not explicitly mentioned, so users may need to verify specific limits.
#### Redis
**9. Redis Labs**
- **Features:** Redis Labs offers a free tier for their managed Redis hosting, providing robust features and easy scalability.
- **Free Tier Limits:** The free tier typically includes 30MB of storage.
- **Pros:** High performance, automated backups, and support for various data persistence models.
- **Cons:** Limited storage on the free tier, suitable mainly for small-scale applications or development.
**10. ScaleGrid**
- **Features:** ScaleGrid offers managed Redis hosting with high customizability and administrative control.
- **Free Tier Limits:** A free trial is available for users to evaluate the service.
- **Pros:** Full access to Redis commands, customizable backup schedules, and support for large-scale deployments.
- **Cons:** The free tier details are not explicitly mentioned, so users may need to verify specific limits.
### Summary
These providers offer reliable free tiers for various database services, making them ideal for development, testing, and small-scale applications. Each has its own set of features and limitations, so the best choice will depend on your specific needs and the scale of your projects.
For more detailed information and to sign up, you can visit the respective websites of these providers:
- [Google Cloud Platform](https://cloud.google.com/free)
- [Amazon RDS](https://aws.amazon.com/rds/)
- [ElephantSQL](https://www.elephantsql.com)
- [Heroku](https://www.heroku.com)
- [ScaleGrid](https://www.scalegrid.io)
- [MongoDB Atlas](https://www.mongodb.com/cloud/atlas)
- [DigitalOcean](https://www.digitalocean.com)
- [Redis Labs](https://redislabs.com)
For a visual and detailed comparison, you can watch the MesmerTech video [here](https://www.youtube.com/watch?v=ZtOISu7u_IU&ab_channel=MesmerTech). | sh20raj |
1,893,759 | Embarking on My Tech Learning Journey | Hello world! Today marks the beginning of an exciting adventure in my life. I've decided to document... | 0 | 2024-06-19T15:06:58 | https://dev.to/vatsal_008/embarking-on-my-tech-learning-journey-2ol5 | datascience, dsa, iot, programming | Hello world!
Today marks the beginning of an exciting adventure in my life. I've decided to document my learning experiences as I dive into various tech-related topics. This blog will help me keep track of my progress and stay motivated.
### Today's Learning Highlights
#### Data Structures and Algorithms (DSA) with C++
I'm currently focusing on binary search, a fundamental algorithm that's crucial for efficient data retrieval. Here's what I covered today:
- **Binary Search Basics:** I learned how binary search works by repeatedly dividing the search interval in half. This algorithm is significantly faster than linear search, especially for large datasets.
- **Implementation in C++:** I wrote my first binary search function in C++. It was a great exercise in understanding how to manipulate arrays and implement efficient searching.
#### Linux Fundamentals on HackTheBox Academy
I'm also delving into Linux fundamentals to strengthen my understanding of operating systems. Today's session included:
- **Basic Commands:** I practiced essential Linux commands like `ls`, `cd`, `mkdir`, and `rm`. These commands are the building blocks for navigating and managing the Linux file system.
#### Data Science with Python on Edureka
To broaden my skill set, I've started a data science course with Python. Today, I covered:
- **Introduction to Python for Data Science:** I got an overview of how Python is used in data science. I installed necessary libraries like Pandas and NumPy.
- **Basic Data Operations:** I practiced loading and manipulating data using Pandas, which is an essential skill for data analysis.
#### IoT Projects with Bolt Cloud
I enjoy working on IoT projects occasionally, and today I tinkered with:
- **Setting Up Bolt Cloud:** I connected my IoT device to the Bolt Cloud platform and set up basic monitoring.
- **Simple Sensor Project:** I created a simple project to monitor temperature using a sensor. It's always fun to see real-world data being collected and analyzed.
#### Internship at an Upcoming Beauty Startup
I'm also doing an internship in the Research and Development department of an upcoming beauty products startup. Today, I focused on:
- **Market Analysis of Top Beauty Brands:** I conducted a market analysis to understand the strategies and product offerings of top beauty brands. This involved studying market trends, customer preferences, and competitive analysis. It's a fascinating blend of tech and business insights that helps shape our product development.
### Challenges Faced
Learning multiple topics simultaneously can be overwhelming. Here are a couple of challenges I encountered today:
- **Switching Contexts:** Jumping between DSA, Linux, data science, IoT projects, and market analysis requires a lot of context switching, which can be mentally exhausting. I need to find a balance and create a structured schedule.
- **Debugging Code:** I spent quite a bit of time debugging my C++ code for binary search. It's a reminder that patience and persistence are key in programming.
### What's Next?
Tomorrow, I plan to:
- Continue with binary search in DSA and tackle some practice problems to reinforce my understanding.
- Explore more advanced Linux commands and learn on HackTheBox Academy.
- Dive deeper into data manipulation techniques with Pandas in my data science course on Edureka.
- Start a new IoT project to monitor another environmental variable using the Bolt Cloud platform.
- Continue with the market analysis by looking into emerging trends and technologies in the beauty industry.
### Final Thoughts
I'm thrilled about this new endeavor. Documenting my learning process will not only help me stay motivated but also serve as a valuable resource I can look back on. If you stumble upon this blog and have any tips, resources, or just want to say hi, feel free to leave a comment. Here's to continuous learning and growth!
Stay curious and keep coding!
---
| vatsal_008 |
1,893,758 | Open-Source, Let's Talk About it | Would you open your code? Open-source software has become a crucial part of the technology... | 0 | 2024-06-19T15:05:04 | https://dev.to/litlyx/open-source-lets-talk-about-it-42jo | discuss, opensource, beginners, devops | ### Would you open your code?
Open-source software has become a crucial part of the technology ecosystem. Sharing your code with the world can bring numerous benefits, but it also comes with certain risks.
We opened our project, it's called [Litlyx](https://github.com/Litlyx/litlyx) (please leave a star on github if you like it! It means a lot for us!) and is a **One-Line Code Analytics Solution** for traking more than 10 KPIs for your website & web apps. It comes with a dashboard, an AI data analyst integrated to help you navigate your data collected with **Lit**.
I want to leave some question to you and i would love to engage in the comments below!
#### Questions to consider:
- Would you open your code?
- What are the risks involved, in your opinion?
Let's discuss! Comment down below. | litlyx |
1,873,627 | PHP 8.4: Property Hooks | PHP 8.4 is expected for this fall. Let's review the RFC "Property Hooks." Disclaimer... | 4,812 | 2024-06-06T19:20:58 | https://dev.to/spo0q/php-84-property-hooks-45i8 | php, programming, news | PHP 8.4 is expected for this fall. Let's review the RFC "Property Hooks."
## Disclaimer (08/06)
After reading a comment on this post, I think it should be indicated that the idea with this RFC is not to use it for anything and everything.
It's not meant to replace all cases, but can be very beneficial in case you need it (e.g., data object).
## What are PHP RFCs?
RFC means "Request For Comments." It's a pretty old concept (probably older than Internet itself) many core teams and their community use to discuss and implement new features, deprecate obsolete code or enhance existing structures.
The process for PHP is pretty well-documented, so do not hesitate to read [this page](https://wiki.php.net/rfc#request_for_comments) if you want more details.
Here we'll focus on a specific RFC that looks promising: Property Hooks.
## Other notable RFCs
While we'll focus on Property Hooks, there are other RFCs you might want to read:
- [Deprecate implicitly nullable parameter types](https://wiki.php.net/rfc/deprecate-implicitly-nullable-types)
- [new MyClass()->method() without parentheses](https://wiki.php.net/rfc/new_without_parentheses)
- [Increasing the default BCrypt cost](https://wiki.php.net/rfc/bcrypt_cost_2023)
- [Raising zero to the power of negative number](https://wiki.php.net/rfc/raising_zero_to_power_of_negative_number)
- [DOM HTML5 parsing and serialization](https://wiki.php.net/rfc/domdocument_html5_parser)
- [Multibyte for ucfirst and lcfirst functions](https://wiki.php.net/rfc/mb_ucfirst)
- [Multibyte for trim function mb_trim, mb_ltrim and mb_rtrim ](https://wiki.php.net/rfc/mb_trim)
## Where to find all accepted RFCs?
You can check [this page](https://wiki.php.net/rfc#php_84).
## Property hooks in short
This [RFC](https://wiki.php.net/rfc#request_for_comments) aims to remove the hassle of using boilerplate (e.g., getters/setters) for common interaction with object's properties.
PHP 8.0 already allows promoting properties in the constructor, so it's far less verbose than it used to be:
```PHP
class User
{
public function __construct(public string $name) {}
}
```
However, the RFC underlines the fact there's no built-in way to add custom behaviors or validation to these properties, which ultimately brings developers back to clumsy and verbose solutions (boilerplate or magic getters/setters).
With property hooks, this could be built-in the language:
```PHP
interface Named
{
public string $fullName { get; } // make the hook required
}
class User implements Named
{
public function __construct(private string $firstName, private string $lastName) {}
public string $fullName {
get => strtoupper($this->firstName) . " " . strtoupper($this->lastName);
}
}
```
## What's the problem with getters and setters?
You may read this [old] introduction:
{% embed https://dev.to/spo0q/about-setters-and-getters-4l68 %}
👉🏻 When used blindly, setters and getters can break encapsulation, as the idea is to prevent anybody from modifying the object from the outside, and you probably want to keep the implementation private.
## Wrap up
PHP contributors seem more and more inspired by other languages (e.g. [Kotlin](https://kotlinlang.org/docs/properties.html#getters-and-setters)).
The RFC only includes two hooks: `set` and `get`, but there could be more hooks in the future.
| spo0q |
1,893,757 | Taming the Log Deluge: Centralized Logging with Amazon CloudWatch and AWS CloudTrail | Taming the Log Deluge: Centralized Logging with Amazon CloudWatch and AWS CloudTrail In... | 0 | 2024-06-19T15:05:03 | https://dev.to/virajlakshitha/taming-the-log-deluge-centralized-logging-with-amazon-cloudwatch-and-aws-cloudtrail-31d | 
# Taming the Log Deluge: Centralized Logging with Amazon CloudWatch and AWS CloudTrail
In the ever-evolving landscape of cloud computing, robust logging and monitoring are non-negotiable. The ability to track, analyze, and respond to events across an application ecosystem is paramount for maintaining operational health, ensuring security, and optimizing performance. Amazon Web Services (AWS) offers a powerful suite of tools to address these needs, with Amazon CloudWatch and AWS CloudTrail taking center stage for centralized logging.
### Understanding the Building Blocks: CloudWatch and CloudTrail
**Amazon CloudWatch** provides a unified platform for monitoring resources and applications deployed on AWS. It collects and aggregates data from various sources, transforming it into actionable insights. Key components include:
* **CloudWatch Logs:** This service enables the ingestion and storage of log data from a variety of sources, including applications, EC2 instances, and AWS services. It offers powerful querying, analysis, and visualization capabilities through CloudWatch Logs Insights.
* **CloudWatch Metrics:** CloudWatch Metrics provide a numerical representation of resource and application performance over time. These metrics can be used for real-time alerting, historical analysis, and capacity planning.
* **CloudWatch Alarms:** These act as proactive sentinels, triggering notifications or automated actions based on predefined thresholds for CloudWatch metrics. This enables timely responses to performance bottlenecks or potential issues.
**AWS CloudTrail** complements CloudWatch by providing a comprehensive audit trail of all API activity within an AWS account. It diligently records every API call made, capturing critical information such as:
* **Identity of the API caller:** Crucial for accountability and security audits, CloudTrail reveals the user, role, or AWS service that initiated the API call.
* **Time of the API call:** Provides a chronological record of events for audit trails and incident response.
* **Source IP address:** Aids in identifying potential malicious activity or unauthorized access attempts.
* **Event name and parameters:** Offers granular details about the specific action performed and any associated resources.
### Use Cases for Centralized Logging
The synergy between CloudWatch and CloudTrail unlocks a wide range of use cases that are essential for managing and securing applications on AWS:
1. **Real-time Application Monitoring and Troubleshooting:** By ingesting application logs into CloudWatch Logs, teams gain real-time visibility into application behavior. This allows for rapid identification of errors, performance bottlenecks, and other issues, enabling swift troubleshooting and resolution. CloudWatch Logs Insights further empowers developers with powerful querying capabilities to analyze logs, pinpoint root causes, and optimize application performance.
2. **Security Auditing and Compliance:** CloudTrail's meticulous audit logs provide a forensic trail of all activity within an AWS account. This is invaluable for:
* **Meeting regulatory compliance requirements:** Many industry standards (e.g., PCI DSS, HIPAA) mandate detailed audit trails for security and accountability.
* **Detecting and investigating security incidents:** By analyzing CloudTrail logs, security teams can uncover unauthorized access attempts, data exfiltration, or suspicious API activity.
* **Demonstrating compliance:** CloudTrail logs serve as auditable evidence of security controls and compliance posture.
3. **Resource Change Tracking and Management:** CloudTrail provides an immutable record of all resource configuration changes made within an AWS environment. This is crucial for:
* **Change management:** Understanding who made what changes, when, and why is essential for maintaining control and accountability over infrastructure.
* **Troubleshooting configuration drifts:** By comparing CloudTrail logs against desired state configurations, teams can identify and rectify configuration drifts that may impact application stability.
4. **Performance Optimization and Capacity Planning:** CloudWatch metrics provide a comprehensive view of resource utilization over time. By analyzing these metrics, organizations can:
* **Identify performance bottlenecks:** Spikes in CPU utilization, disk I/O, or network traffic can signal underlying performance issues that need to be addressed.
* **Right-size resources:** Historical usage patterns help determine optimal resource allocation, potentially leading to cost savings.
* **Plan for future capacity needs:** Trend analysis enables proactive scaling to meet anticipated increases in demand.
5. **Automated Incident Response and Remediation:** CloudWatch Alarms can trigger automated responses to specific events or metric thresholds. This allows for:
* **Automated scaling:** Dynamically adjust resources (e.g., EC2 instances) based on real-time demand, ensuring optimal performance and cost efficiency.
* **Self-healing systems:** Trigger automated scripts or remediation actions in response to identified issues, minimizing downtime and manual intervention.
### Alternatives and Comparisons
While CloudWatch and CloudTrail form a cornerstone of logging and monitoring on AWS, other cloud providers offer comparable solutions:
* **Google Cloud Platform (GCP):** Google Cloud Logging provides centralized log management, ingesting logs from various sources. Cloud Audit Logs offer audit trails of API activity.
* **Microsoft Azure:** Azure Monitor delivers a comprehensive suite for monitoring and logging, including Azure Log Analytics for log management and Azure Activity Log for audit trails.
These platforms share core functionalities with AWS offerings but may differ in specific features, pricing models, or integration capabilities.
### Conclusion
Centralized logging and monitoring are indispensable for any organization operating in the cloud. Amazon CloudWatch and AWS CloudTrail provide a robust and feature-rich platform to effectively address these needs on AWS. By embracing these services, organizations gain deep visibility into their applications and infrastructure, enabling them to ensure security, enhance performance, and optimize costs.
### Architecting an Advanced Use Case: Real-time Threat Detection and Response
**Challenge:**
A large e-commerce platform requires a real-time threat detection and response system to protect sensitive customer data and ensure business continuity.
**Solution:**
We can leverage a combination of AWS services, orchestrated around CloudWatch and CloudTrail, to architect a comprehensive solution:
1. **Log Ingestion and Aggregation:**
* **CloudTrail:** Configure CloudTrail to log all API activity across all critical AWS accounts and regions.
* ** VPC Flow Logs:** Enable VPC Flow Logs to capture network traffic data within the VPC, providing insights into communication patterns and potential anomalies.
* **Security Information and Event Management (SIEM) Tool:** Forward CloudTrail logs and VPC Flow Logs to a dedicated SIEM tool like Splunk or Elastic Stack for advanced analysis and correlation.
2. **Real-time Threat Detection:**
* **SIEM Rule Engine:** Develop and deploy custom rules within the SIEM to identify suspicious activities such as:
* Multiple failed login attempts from unusual locations.
* Unauthorized API calls accessing sensitive data.
* Anomalous network traffic patterns indicative of data exfiltration.
* **Machine Learning (ML) Models:** Integrate ML-powered threat detection services like Amazon GuardDuty or custom-trained models to identify complex threats and zero-day exploits.
3. **Automated Threat Response:**
* **AWS Lambda:** Configure Lambda functions to trigger automated responses based on SIEM alerts, such as:
* Automatically blocking suspicious IP addresses using AWS WAF (Web Application Firewall).
* Disabling compromised user accounts.
* Isolating affected resources to prevent lateral movement.
4. **Continuous Monitoring and Improvement:**
* **CloudWatch Dashboards:** Create custom dashboards to visualize security-related metrics, SIEM alerts, and automated response actions in real time.
* **Incident Response Playbooks:** Develop and regularly test incident response playbooks to ensure a coordinated and efficient response to security events.
This advanced use case highlights how CloudWatch and CloudTrail, working in concert with other AWS services, empower organizations to implement robust security controls, detect threats in real time, and automate responses to mitigate risks effectively.
| virajlakshitha | |
1,893,756 | Unleashing the Power of Event-Driven Architecture | Introduction Event-Driven Architecture (EDA) is a paradigm shift from traditional... | 0 | 2024-06-19T15:04:53 | https://dev.to/tutorialq/unleashing-the-power-of-event-driven-architecture-25h4 | eventdriven, microservices, scalability, designpatterns | ### Introduction
Event-Driven Architecture (EDA) is a paradigm shift from traditional request-response models to a model where the system's flow is driven by events. This approach is crucial for designing responsive and scalable applications capable of handling real-time data and complex workflows. In this article, we'll dive deep into the core concepts of EDA, discuss its benefits and challenges, and explore various use cases and design strategies to help you harness the full potential of this architecture.
### Understanding Event-Driven Architecture
Event-Driven Architecture is built around the concept of events, which are significant changes in the state of a system or environment. Here are the core components and concepts:
#### Components of EDA
- **Events**: Signals that something of interest has happened.
- **Event Producers**: Components that generate events. These could be sensors, user actions, or system changes.
- **Event Consumers**: Components that react to events. These could be services, applications, or processes.
- **Event Channels**: Pathways through which events travel from producers to consumers. These channels ensure the delivery and routing of events.
#### Event Flow and Lifecycle
1. **Event Generation**: An event is generated by an event producer when a significant change occurs.
2. **Event Propagation**: The event is transmitted via an event channel, which can include message brokers or event buses.
3. **Event Consumption**: An event consumer processes the event, triggering appropriate actions.
4. **Event Processing**: This can involve simple reactions or complex workflows depending on the event's nature and the system's design.
### Benefits of Event-Driven Architecture
EDA provides numerous advantages, particularly in environments requiring high scalability and responsiveness:
#### Scalability and Performance
EDA's decoupled nature allows individual components to scale independently. For example, an e-commerce platform can scale its order processing system separately from its inventory management system, based on the specific load each component experiences.
#### Flexibility and Agility
By decoupling components, EDA enhances flexibility. Changes to one part of the system do not necessitate changes to others, allowing for rapid development and deployment cycles. This agility is particularly beneficial in microservices architectures, where services can be developed and deployed independently.
#### Real-time Processing and Responsiveness
EDA excels in real-time applications. For instance, financial trading systems can process market events and execute trades in milliseconds, providing a competitive edge.
#### Decoupling of Components
Decoupling simplifies maintenance and enhances the resilience of systems. For example, in a microservices architecture, if one service fails, it does not bring down the entire system, as other services can continue to operate independently.
### Key Concepts in Event-Driven Architecture
To fully leverage EDA, understanding its key concepts is essential:
#### Event Sourcing
Event Sourcing captures all changes to an application's state as a sequence of events. Instead of storing the current state, the system stores all events that led to that state.
**Implementation Details**:
- **Event Store**: A dedicated storage system that records all events.
- **Replaying Events**: Reconstructing the current state by replaying events.
- **Snapshotting**: Periodically saving the state to reduce replay time.
**Benefits**:
- **Auditability**: Complete history of changes.
- **Debugging**: Ability to replay events and trace issues.
**Challenges**:
- **Event Evolution**: Handling changes in event schema over time.
- **Storage**: Managing large volumes of events.
**Example**: A banking system that logs every transaction as an event, allowing for precise auditing and state reconstruction.
#### CQRS (Command Query Responsibility Segregation)
CQRS separates read and write operations into distinct models. The command model handles updates, while the query model handles read operations.
**Implementation Details**:
- **Command Handlers**: Process commands and update the state.
- **Query Handlers**: Serve read requests from a potentially denormalized read model.
- **Event Handlers**: Update the read model based on events generated by the command model.
**Benefits**:
- **Performance**: Optimized read and write operations.
- **Scalability**: Independent scaling of read and write models.
**Challenges**:
- **Consistency**: Ensuring eventual consistency between models.
- **Complexity**: Increased complexity in maintaining two separate models.
**Example**: An online marketplace where order placements (commands) are handled separately from order views (queries), ensuring efficient handling of both operations.
#### Event Streams
Event Streams represent continuous flows of events and are crucial for real-time data processing.
**Technologies**:
- **Apache Kafka**: A distributed event streaming platform.
- **Amazon Kinesis**: A real-time event streaming service.
**Implementation Details**:
- **Producers**: Generate events and publish them to streams.
- **Consumers**: Subscribe to streams and process events in real-time.
- **Partitions**: Dividing streams to enable parallel processing.
**Example**: A social media platform that uses Kafka to handle user activity streams, enabling real-time analytics and notifications.
#### Event Processing Patterns
- **Simple Event Processing**: Direct response to individual events. For instance, updating a user's last login time upon login.
- **Complex Event Processing (CEP)**: Analyzing patterns within multiple events to infer higher-level insights. For example, detecting fraudulent activities by correlating multiple suspicious transactions.
- **Event Stream Processing**: Continuous processing of event data streams. For instance, monitoring sensor data in an IoT network to detect anomalies.
### Use Cases of Event-Driven Architecture
EDA is widely applicable across various domains, each leveraging its unique strengths:
#### Real-time Analytics
EDA enables businesses to collect, process, and analyze data in real-time, providing actionable insights.
**Example**: A retail company uses EDA to monitor sales data and adjust inventory in real-time, optimizing stock levels and reducing waste.
#### Microservices Communication
EDA facilitates asynchronous communication between microservices, enhancing scalability and fault tolerance.
**Example**: In an online shopping application, an order service emits events when orders are placed, which inventory and shipping services consume to update stock and initiate delivery processes.
#### Internet of Things (IoT)
IoT applications benefit from EDA's ability to handle vast amounts of data generated by devices.
**Example**: A smart city infrastructure uses EDA to manage data from traffic sensors, optimizing traffic flow and reducing congestion in real-time.
#### Financial Services and Trading Systems
Financial systems require high-frequency data processing and real-time responsiveness.
**Example**: A stock trading platform uses EDA to process market data and execute trades with minimal latency, ensuring traders can react to market changes instantaneously.
#### E-commerce and Customer Experience Personalization
EDA allows e-commerce platforms to react to user behaviors and personalize experiences in real-time.
**Example**: An e-commerce site tracks user interactions and tailors product recommendations dynamically, enhancing user engagement and sales.
### Designing an Event-Driven System
Effective design is critical for the success of an event-driven system:
#### Best Practices and Design Considerations
- **Loose Coupling**: Ensure components are independent to enhance flexibility and maintainability.
- **Idempotency**: Design event handlers to be idempotent, handling duplicate events gracefully.
- **Event Schema**: Carefully design event schemas to ensure compatibility and ease of evolution.
#### Choosing the Right Tools and Technologies
Selecting appropriate tools is crucial. Consider factors like scalability, reliability, and ease of integration.
**Examples**:
- **Kafka**: For high-throughput event streaming.
- **RabbitMQ**: For reliable message queuing.
- **AWS Lambda**: For serverless event processing.
#### Implementing Event-Driven Microservices
Design microservices to react to events and process them independently. Use event routers and brokers to manage event flow and ensure scalability.
**Example**: A travel booking system where separate services handle booking, payment, and notifications, all coordinated through events.
#### Handling Failures and Ensuring Reliability
Implement strategies to manage failures and ensure system reliability:
- **Retries and Dead-letter Queues**: Handle transient failures by retrying events and logging unprocessable events for later analysis.
- **Circuit Breakers**: Prevent cascading failures by isolating failing components.
- **Monitoring and Alerting**: Use tools to monitor event flows and trigger alerts on anomalies.
#### Monitoring and Maintaining an Event-Driven System
Continuous monitoring and maintenance are essential:
- **Observability**: Implement comprehensive logging and tracing to understand event flows and diagnose issues.
- **Metrics**: Track key performance indicators like event throughput, latency, and error rates.
- **Automated Recovery**: Use automated mechanisms to recover from failures and ensure system resilience.
### Challenges and Solutions in Event-Driven Architecture
Despite its advantages, EDA presents several challenges:
#### Event Ordering
Ensuring events are processed in the correct order is critical, particularly in distributed systems.
**Challenges**:
- **Distributed Systems**: In a distributed environment, maintaining a strict order of events can be challenging due to network latency and partitioning.
- **Event Duplication**: Events can be duplicated due to retries or network issues, complicating the ordering.
**Solutions**:
- **Sequence Numbers**: Attach sequence numbers to events to track their order.
- **Timestamps**: Use timestamps to order events, though this can be affected by clock synchronization issues.
- **Kafka**: Utilize Kafka’s partitioning and ordering guarantees within a partition to ensure event order.
- **Logical Clocks**: Implement logical clocks (e.g., Lamport clocks) to maintain a consistent event order.
**Technologies**:
- **Apache Kafka**: Ensures ordering within partitions.
- **Amazon Kinesis**: Provides ordered data records within a shard.
#### Idempotency
Handling duplicate events without adverse effects is essential.
**Challenges**:
- **Duplicate Events**: Due to
retries or network issues, consumers may receive the same event multiple times.
- **Side Effects**: Processing duplicates can lead to unwanted side effects, such as duplicate transactions or state corruption.
**Solutions**:
- **Idempotent Handlers**: Design event handlers to be idempotent, meaning multiple processing attempts result in the same outcome.
- **Deduplication**: Implement deduplication mechanisms to filter out duplicate events.
- **State Checks**: Check the current state before processing an event to ensure it has not already been processed.
**Technologies**:
- **Database**: Use databases with unique constraints to prevent duplicate records.
- **Redis**: Utilize Redis for quick lookup and deduplication.
#### State Management
Maintaining state consistency in a distributed environment can be challenging.
**Challenges**:
- **Consistency**: Ensuring all parts of the system have a consistent view of the state.
- **Latency**: Propagating state changes across the system can introduce latency.
- **Partitioning**: Distributing state across multiple nodes can complicate consistency.
**Solutions**:
- **Event Sourcing**: Use event sourcing to maintain a consistent state by replaying events.
- **CQRS**: Separate read and write models to optimize for consistency and performance.
- **Distributed State Management**: Use distributed databases or state management frameworks to ensure consistency across nodes.
**Technologies**:
- **Event Store**: Use dedicated event stores like EventStoreDB to manage event-sourced data.
- **Apache Flink**: Utilize stream processing frameworks for managing state in real-time event streams.
- **Apache Samza**: For stateful stream processing in a distributed environment.
**Case Study**: A logistics company faced issues with event ordering and implemented Kafka's partitioning and replication features, ensuring reliable event sequencing and delivery.
### Conclusion
Event-Driven Architecture represents a powerful approach for building responsive, scalable, and flexible applications. By understanding its core concepts, benefits, and challenges, and applying best practices, developers can design robust systems that meet the demands of modern users. As the technology landscape evolves, EDA will continue to play a pivotal role in shaping the future of software architecture. Embrace the power of events and transform your applications today. | tutorialq |
1,893,755 | 1482. Minimum Number of Days to Make m Bouquets | 1482. Minimum Number of Days to Make m Bouquets Medium You are given an integer array bloomDay, an... | 27,523 | 2024-06-19T15:00:12 | https://dev.to/mdarifulhaque/1482-minimum-number-of-days-to-make-m-bouquets-gn7 | php, leetcode, algorithms, programming | 1482\. Minimum Number of Days to Make m Bouquets
Medium
You are given an integer array `bloomDay`, an integer `m` and an integer `k`.
You want to make `m` bouquets. To make a bouquet, you need to use `k` **adjacent flowers** from the garden.
The garden consists of `n` flowers, the <code>i<sup>th</sup></code> flower will bloom in the `bloomDay[i]` and then can be used in **exactly one** bouquet.
Return _the minimum number of days you need to wait to be able to make `m` bouquets from the garden_. If it is impossible to make m bouquets return `-1`.
**Example 1:**
- **Input:** bloomDay = [1,10,3,10,2], m = 3, k = 1
- **Output:** 3
- **Explanation:** Let us see what happened in the first three days. x means flower bloomed and _ means flower did not bloom in the garden.
We need 3 bouquets each should contain 1 flower.
After day 1: [x, _, _, _, _] // we can only make one bouquet.
After day 2: [x, _, _, _, x] // we can only make two bouquets.
After day 3: [x, _, x, _, x] // we can make 3 bouquets. The answer is 3.
**Example 2:**
- **Input:** bloomDay = [1,10,3,10,2], m = 3, k = 2
- **Output:** -1
- **Explanation:** We need 3 bouquets each has 2 flowers, that means we need 6 flowers. We only have 5 flowers so it is impossible to get the needed bouquets and we return -1.
**Example 3:**
- **Input:** bloomDay = [7,7,7,7,12,7,7], m = 2, k = 3
- **Output:** 12
- **Explanation:** We need 2 bouquets each should have 3 flowers.
Here is the garden after the 7 and 12 days:
After day 7: [x, x, x, x, _, x, x]
We can make one bouquet of the first three flowers that bloomed. We cannot make another bouquet from the last three flowers that bloomed because they are not adjacent.
After day 12: [x, x, x, x, x, x, x]
It is obvious that we can make two bouquets in different ways.
**Constraints:**
- <code>bloomDay.length == n</code>
- <code>1 <= n <= 10<sup>5</sup></code>
- <code>1 <= bloomDay[i] <= 10<sup>9</sup></code>
- <code>1 <= m <= 10<sup>6</sup></code>
- <code>1 <= k <= n</code>
**Solution:**
```
class Solution {
/**
* @param Integer[] $bloomDay
* @param Integer $m
* @param Integer $k
* @return Integer
*/
function minDays($bloomDay, $m, $k) {
if (($m * $k) > count($bloomDay)) {
return -1;
}
$start = 0;
$end = max($bloomDay);
$minDays = -1;
while ($start <= $end) {
$mid = ceil(($start + $end) / 2);
if ($this->canMakeBouquets($bloomDay, $mid, $k) >= $m) {
$minDays = $mid;
$end = $mid - 1;
} else {
$start = $mid + 1;
}
}
return $minDays;
}
/**
* @param Integer[] $bloomDay
* @param Float $mid
* @param Integer $k
* @return Integer
*/
function canMakeBouquets($bloomDay, $mid, $k) {
$bouquetsMade = 0;
$flowersCollected = 0;
foreach ($bloomDay as $day) {
if ($day <= $mid) {
$flowersCollected += 1;
} else {
$flowersCollected = 0;
}
if ($flowersCollected == $k) {
$bouquetsMade += 1;
$flowersCollected = 0;
}
}
return $bouquetsMade ;
}
}
```
**Contact Links**
- **[LinkedIn](https://www.linkedin.com/in/arifulhaque/)**
- **[GitHub](https://github.com/mah-shamim)**
| mdarifulhaque |
1,893,754 | How To Build a TikTok Clone With SwiftUI | Apps like TikTok, Instagram Reels, and YouTube Shorts help users engage with their audiences through... | 0 | 2024-06-19T14:54:29 | https://getstream.io/blog/swiftui-tiktok-clone/ | swift, swiftu, ios, xcode |
Apps like [TikTok](https://www.tiktok.com/), [Instagram Reels](https://about.instagram.com/blog/announcements/introducing-instagram-reels-announcement), and [YouTube Shorts](https://www.youtube.com/hashtag/shorts) help users engage with their audiences through concise, bite-sized videos. Let's create a TikTok clone, allowing users to browse through short videos of their favorite people, discover new ones, and also record their own videos for others to watch.
## Project Requirements
To follow along with this tutorial, you will need an Xcode installation. It is recommended to [download Xcode](https://developer.apple.com/xcode/) 15 or a later version. Also, to provide access to the user's camera feed in this app, we will use the [Stream Video SDK](https://getstream.io/video/sdk/). The Video SDK allows developers to build FaceTime-style video calling](https://getstream.io/blog/facetime-clone/), Twitch-like content streaming](https://getstream.io/blog/stream-video-twitch-clone/), Zoom-like video conferencing](https://getstream.io/blog/swiftui-video-conferencing-app/), and [audio room](https://getstream.io/video/sdk/ios/tutorial/audio-room/) platforms with reusable components. After creating a new SwiftUI project, you can fetch and install [Stream Video](https://getstream.io/video/) using [Swift Package Manager](https://www.swift.org/documentation/package-manager/) in Xcode.
## Explore the Sample SwiftUI TikTok Clone App
Before you follow the steps in this tutorial, it will be great to have a look and feel how the finished project works. You can get the final sample app from [GitHub](https://github.com/GetStream/stream-tutorial-projects/tree/main/iOS-SwiftUI/TikTokSwiftUI), open it in Xcode, explore the code structure and discover how it works. The final project already has microphone and camera usage permissions configured. The following section explains how to set those configurations in Xcode.
## Create and Configure the SwiftUI Project
Please create a new SwiftUI project in Xcode and name it as you like. The sample project in this tutorial uses **TikTokCloneSwiftUI** as the app name. The app will rely on [audio/sound](https://getstream.io/video/docs/ios/ui-cookbook/audio-volume-indicator/) from the user's device and [live video capture](https://getstream.io/video/docs/ios/ui-components/video-renderer/) from the camera feed. Access to these device capabilities (sound and video) requires setting [camera](https://developer.apple.com/documentation/bundleresources/information_property_list/nscamerausagedescription) and [microphone](https://developer.apple.com/documentation/bundleresources/information_property_list/nsmicrophoneusagedescription) usage description privacies in Xcode. Select the app's root folder in the Xcode Project Navigator and click the **Info** tab. Then, click any of the **+** buttons you see when hovering over the items under **Key**. Search through the **Privacy** category and add:
- **Privacy - Microphone Usage Description**
- **Privacy - Camera Usage Description**
## Build the TikTok-Like UIs
The app we built in this tutorial will allow short-form video browsing and self-recording using the iOS device's camera. The primary interaction styles include snap-flicking (paging) to watch bite-sized videos and tapping to record a live video as demonstrated in the image below.
When the app launches, it displays the video feeds [TabView](https://developer.apple.com/documentation/swiftui/tabview) with a horizontal paging scroll style. This effect is opposite to that of the original TikTok app, which snap-scrolls vertically. The video feeds use standard SwiftUI views that implement [AVKit](https://developer.apple.com/documentation/avkit/videoplayer). In a later article, we will integrate this feature with [Stream's Activity Feeds](https://getstream.io/activity-feeds/docs/?language=javascript).
### Create the Looping Videos
This project will have five looping videos that users can cycle through for demonstration. The video feeds can be implemented using [activity feeds](https://getstream.io/activity-feeds/docs/ios-swift/?language=swift) in an actual application. Since each looping video uses the same Swift code, let's demonstrate it with the following sample code. When you [download](https://github.com/GetStream/stream-tutorial-projects/tree/main/iOS-SwiftUI/TikTokSwiftUI) the Xcode project from GitHub, you will find all the files in it.
```swift
//
// FirstVideoView.swift
import SwiftUI
import AVFoundation
import AVKit
struct FirstVideoView: View {
@State var player = AVPlayer()
let avPlayer = AVPlayer(url: Bundle.main.url(forResource: "oneDancing", withExtension: "mp4")!)
var body: some View {
ZStack {
VideoPlayer(player: avPlayer)
.scaledToFill()
.ignoresSafeArea()
.onAppear {
avPlayer.play()
avPlayer.actionAtItemEnd = .none
NotificationCenter.default.addObserver(forName: .AVPlayerItemDidPlayToEndTime, object: avPlayer.currentItem, queue: .main) { (_) in
avPlayer.seek(to: .zero)
avPlayer.play()
}
}
}
}
}
#Preview {
FirstVideoView()
.preferredColorScheme(.dark)
}
```
The sample code above creates a SwiftUI video player that loops forever using AVKit and [AVFoundation](https://developer.apple.com/av-foundation/).
## Create the Video Feed Overlays
As indicated in the image above, each of the looping videos has two groups of views overlaid on it. Let's create `ReactionButtons1View.swift` to display the user's profile, likes, comments, and sharing ability in a vertical stack parent view. This sample code displays the icons on all the videos when you swipe through them.
```swift
//
// ReactionButtonsView.swift
// TikTokCloneSwiftUI
import SwiftUI
struct ReactionButtons1View: View {
var body: some View {
VStack(spacing: 24) {
Button {
} label: {
Image(.profile1)
.resizable()
.scaledToFit()
.frame(width: 60, height: 60)
.clipShape(Circle())
.overlay(
Circle()
.stroke(LinearGradient(gradient: Gradient(colors: [Color.red, Color.blue]), startPoint: .topLeading, endPoint: .bottomTrailing), lineWidth: 2)
)
}
Button {
} label: {
VStack {
Image(systemName: "suit.heart.fill")
.font(.title)
Text("5K")
}
.foregroundStyle(.white)
}
Button {
} label: {
VStack {
Image(systemName: "message.fill")
.font(.title)
Text("56")
}
.foregroundStyle(.white)
}
Button {
} label: {
VStack {
Image(systemName: "square.and.arrow.up.fill")
.font(.title)
Text("Share")
}
.foregroundStyle(.white)
}
}
.padding()
}
}
#Preview {
ReactionButtons1View()
.preferredColorScheme(.dark)
}
```
**Create the TikTok-Like Tab Bar**
The tab bar contains five tab items. Only one of the tab items has interactivity, a plus button to launch a live video of users. To create the UI, add `FeedsView.swift` to the project and use the sample code below to fill out its content.
```swift
//
// FeedsView.swift
// TikTokCloneSwiftUI
//
// Created by Amos Gyamfi on 31.5.2024.
//
import SwiftUI
struct FeedsView: View {
@State var top = 0
@State private var isLocalVideoShowing = false
var body: some View {
NavigationStack {
ZStack {
HTabView()
.padding(.top, -200)
HStack {
Spacer()
//ReactionButtons1View()
}
}
.toolbar {
ToolbarItem(placement: .principal) {
HStack {
Button {
self.top = 0
} label: {
Text("Following")
.fontWeight(self.top == 0 ? .bold : .none)
.foregroundStyle(self.top == 0 ? .white : .white.opacity(0.5))
.padding(.vertical)
}
.buttonStyle(.plain)
Button {
self.top = 1
} label: {
Text("For You")
.fontWeight(self.top == 1 ? .bold : .none)
.foregroundStyle(self.top == 1 ? .white : .white.opacity(0.5))
.padding(.vertical)
}
.buttonStyle(.plain)
}
}
ToolbarItemGroup {
Button {
//
} label: {
Image(systemName: "magnifyingglass")
}
.buttonStyle(.plain)
}
ToolbarItemGroup(placement: .bottomBar) {
Button {
} label: {
VStack {
Image(systemName: "house.fill")
Text("Home")
.font(.caption)
}
}
.buttonStyle(.plain)
Spacer()
Button {
} label: {
VStack {
Image(systemName: "person.2")
Text("Friends")
.font(.caption)
}
}
.buttonStyle(.plain)
Spacer()
Button {
isLocalVideoShowing.toggle()
} label: {
Image(systemName: "plus.rectangle.fill")
}
.font(.title3)
.buttonStyle(.plain)
.foregroundStyle(.black)
.padding(EdgeInsets(top: 0, leading: 2, bottom: 0, trailing: 2))
.background(LinearGradient(gradient: Gradient(colors: [.teal, .red]), startPoint: .leading, endPoint: .trailing))
.cornerRadius(6)
.fullScreenCover(isPresented: $isLocalVideoShowing, content: CreateJoinLiveVideo.init)
Spacer()
Button {
} label: {
VStack {
Image(systemName: "tray")
Text("Inbox")
.font(.caption)
}
}
.buttonStyle(.plain)
Spacer()
Button {
} label: {
VStack {
Image(systemName: "person")
Text("Profile")
.font(.caption)
}
}
.buttonStyle(.plain)
}
}
}
}
}
#Preview {
FeedsView()
.preferredColorScheme(.dark)
}
```
## Create the Live Video Overlays
The live video overlays consist of a video settings view (vertical container), duration options (horizontal container), and recording UI (pink button), as demonstrated in the image above. Create `LiveVideoSettingsView.swift` and substitute its content with the sample code below.
```swift
//
// LiveVideoSettingsView.swift
// TikTokCloneSwiftUI
//
// Created by Amos Gyamfi on 1.6.2024.
//
import SwiftUI
struct LiveVideoSettingsView: View {
var body: some View {
VStack(spacing: 24) {
Button {
//
} label: {
Image(systemName: "bolt.slash.fill")
}
Button {
//
} label: {
Image(systemName: "timer")
}
Button {
//
} label: {
Image(systemName: "camera.filters")
}
Button {
//
} label: {
Image(systemName: "camera.aperture")
}
Button {
//
} label: {
Image(systemName: "wand.and.stars")
}
}
.font(.title2)
.bold()
.buttonStyle(.plain)
.padding()
.background(.quaternary)
.cornerRadius(32)
}
}
#Preview {
LiveVideoSettingsView()
.preferredColorScheme(.dark)
}
```
Also, create `LiveVideoOptionsView.swift` and replace the template code with the following.
```swift
//
// LiveVideoOptionsView.swift
// TikTokCloneSwiftUI
//
// Created by Amos Gyamfi on 1.6.2024.
//
import SwiftUI
struct LiveVideoOptionsView: View {
var body: some View {
HStack(spacing: 20) {
Button {
//
} label: {
Text("10m")
}
Button {
//
} label: {
Text("60s")
}
Button {
//
} label: {
Text("15s")
}
.buttonStyle(.plain)
.padding(EdgeInsets(top: 4, leading: 8, bottom: 4, trailing: 8))
.background(.tertiary)
.cornerRadius(16)
Button {
//
} label: {
Text("Photo")
}
Button {
//
} label: {
Text("Text")
}
}
.buttonStyle(.plain)
.padding()
.background(.quaternary)
.cornerRadius(32)
}
}
#Preview {
LiveVideoOptionsView()
.preferredColorScheme(.dark)
}
```
The sample code below creates the recording view in `RecordingView.swift`.
```swift
//
// RecordingView.swift
// TikTokCloneSwiftUI
//
// Created by Amos Gyamfi on 2.6.2024.
//
import SwiftUI
struct RecordingView: View {
var body: some View {
ZStack {
Circle()
.fill(.pink)
.frame(width: 64, height: 64)
Circle()
.stroke(lineWidth: 4)
.frame(width: 72, height: 72)
}
}
}
#Preview {
RecordingView()
.preferredColorScheme(.dark)
}
```
Check all the folders in the Xcode Project Navigator for other files related to the app's UI.
## Install and Configure the Video SDK
Supposing we are building a production app with Stream's [iOS Video SDK](https://getstream.io/video/sdk/ios/), we will need authenticated user credentials from a server. Since the demo app in this tutorial is purposely for development, we will use hard-coded user credentials from the SDK's [video calling tutorial](https://getstream.io/video/sdk/ios/tutorial/video-calling/). You can use the API key of your Stream account and the companion [token generator service](https://getstream.io/chat/docs/react/token_generator/) to generate random users and tokens for development testing. Check out the [get started guide](https://getstream.io/blog/stream-getting-started-guide/) to learn more.
To access and work with the SDK, we need to install it as a dependency in the Xcode project. Select **File -> Add Package Dependencies…** and paste this URL, https://github.com/GetStream/stream-video-swift, into the search box to install it.
## Create a Live Video Participant View
For example, when building an [iOS video conferencing app](https://getstream.io/blog/swiftui-video-conferencing-app/) with the Video SDK, you need to render both the local and remote participants' videos and call controls for muting, flipping the camera from front to back, accepting and rejecting calls. However, the above is not a requirement for our TikTokClone. We need to show only the live video of the local participants. Add `ParticipantsView.swift` to the project and fill out its content with the code below.
```swift
//
// ParticipantsView.swift
// TikTokCloneSwiftUI
//
// Created by Amos Gyamfi on 1.6.2024.
//
import SwiftUI
import StreamVideo
import StreamVideoSwiftUI
struct ParticipantsView: View {
var call: Call
var participants: [CallParticipant]
var onChangeTrackVisibility: (CallParticipant?, Bool) -> Void
var body: some View {
GeometryReader { proxy in
if !participants.isEmpty {
ScrollView {
LazyVStack {
if participants.count == 1, let participant = participants.first {
makeCallParticipantView(participant, frame: proxy.frame(in: .global))
.frame(width: proxy.size.width, height: proxy.size.height)
} else {
ForEach(participants) { participant in
makeCallParticipantView(participant, frame: proxy.frame(in: .global))
.frame(width: proxy.size.width, height: proxy.size.height / 2)
}
}
}
}
} else {
Color.black
}
}
.edgesIgnoringSafeArea(.all)
}
@ViewBuilder
private func makeCallParticipantView(_ participant: CallParticipant, frame: CGRect) -> some View {
VideoCallParticipantView(
participant: participant,
availableFrame: frame,
contentMode: .scaleAspectFit,
customData: [:],
call: call
)
.onAppear { onChangeTrackVisibility(participant, true) }
.onDisappear{ onChangeTrackVisibility(participant, false) }
}
}
// Floating Participant
struct FloatingParticipantView: View {
var participant: CallParticipant?
//var size: CGSize = .init(width: 120, height: 120)
var size: CGSize = .init(width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height)
var body: some View {
if let participant = participant {
VStack {
HStack {
Spacer()
VideoRendererView(id: participant.id, size: size) { videoRenderer in
videoRenderer.handleViewRendering(for: participant, onTrackSizeUpdate: { _, _ in })
}
.frame(width: size.width, height: size.height)
.clipShape(RoundedRectangle(cornerRadius: 8))
}
Spacer()
}
.padding()
}
}
}
```
In summary, the above sample code does the following:
- Imports the required dependencies: The `StreamVideo` dependency is the core SDK. It does not contain any UI, so it is an excellent choice if you want to build a fully custom TikTok-like experience. Our demo app will use the SDK's reusable UI components by importing `StreamVideoSwiftUI`.
- Manages the layout with Geometry Reader.
- Renders and displays the local participants.
- Watches for visibility changes of the participant.
## How to Capture a Device’s Camera Feed
The video SDK allows developers to access and display local and remote participants' device camera feeds when [building a video calling app] like WhatsApp. In the context of our TikTok clone, we will use the SDK's' `VideoRenderer` to display only the local participant's video. We use the [VideoRender](https://getstream.io/video/docs/ios/ui-components/video-renderer/) because our app's use case does not require [CallControls](https://getstream.io/video/docs/ios/ui-components/call/call-controls/). To render audio/video calling experiences consisting of active, incoming, and outgoing call screens, you should use the SDK's `CallContainer`. Visit our documentation to learn more about the [CallContainer](https://getstream.io/video/docs/ios/ui-components/call/call-container/).
To get a live video from the iOS device’s camera feed, add a new Swift file `CreateJoinLiveVideo.swift`. Then, replace the template code with the following.
```swift
import SwiftUI
import StreamVideo
import StreamVideoSwiftUI
struct CreateJoinLiveVideo: View {
@State var call: Call
@ObservedObject var state: CallState
@State var callCreated: Bool = false
@State private var isRecording = false
private var client: StreamVideo
private let apiKey: String = "mmhfdzb5evj2" // The API key can be found in the Credentials section
private let token: String = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyX2lkIjoiQm9iYV9GZXR0IiwiaXNzIjoiaHR0cHM6Ly9wcm9udG8uZ2V0c3RyZWFtLmlvIiwic3ViIjoidXNlci9Cb2JhX0ZldHQiLCJpYXQiOjE3MTcxNTM5NTEsImV4cCI6MTcxNzc1ODc1Nn0.wLgPJKgrruRC_4gYT7G0Od2MqPrR1KA8DV-cKi0Yd6k" // The Token can be found in the Credentials section
private let userId: String = "Boba_Fett" // The User Id can be found in the Credentials section
private let callId: String = "2dAfJGl7wThv" // The CallId can be found in the Credentials section
@Environment(\.dismiss) private var dismiss
init() {
let user = User(
id: userId,
name: "Martin", // name and imageURL are used in the UI
imageURL: .init(string: "https://getstream.io/static/2796a305dd07651fcceb4721a94f4505/a3911/martin-mitrevski.webp")
)
// Initialize Stream Video client
self.client = StreamVideo(
apiKey: apiKey,
user: user,
token: .init(stringLiteral: token)
)
// Initialize the call object
let call = client.call(callType: "default", callId: callId)
self.call = call
self.state = call.state
}
var body: some View {
NavigationStack {
VStack {
if callCreated {
ZStack {
ParticipantsView(
call: call,
participants: call.state.remoteParticipants,
onChangeTrackVisibility: changeTrackVisibility(_:isVisible:)
)
FloatingParticipantView(participant: call.state.localParticipant)
VStack {
HStack {
Spacer()
LiveVideoSettingsView()
}
.padding(.horizontal, 32)
HStack {
Spacer()
EffectsButtonView()
Spacer()
Button {
isRecording.toggle()
if isRecording {
func startRecording() {
Task {
try await call.startRecording()
}
}
} else {
func stopRecording() {
Task {
try await call.stopRecording()
}
}
}
} label: {
RecordingView()
}
.buttonStyle(.plain)
Spacer()
UploadButtonView()
Spacer()
}
.padding(.top, 128)
}
}
} else {
//Text("loading...")
ProgressView()
}
}
.onAppear {
Task {
guard callCreated == false else { return }
try await call.join(create: true)
callCreated = true
}
}
.toolbar {
ToolbarItem(placement: .topBarLeading) {
Button {
dismiss()
} label: {
Image(systemName: "xmark")
}
.buttonStyle(.plain)
}
ToolbarItem(placement: .principal) {
Button {
} label: {
HStack {
Image(systemName: "music.quarternote.3")
Text("Add sound")
}
.font(.caption)
}
.buttonStyle(.plain)
.padding(EdgeInsets(top: 8, leading: 10, bottom: 8, trailing: 10))
.background(.quaternary)
.cornerRadius(8)
}
ToolbarItemGroup(placement: .topBarTrailing) {
Button {
} label: {
Image(systemName: "arrow.triangle.2.circlepath")
}
.buttonStyle(.plain)
}
ToolbarItem(placement: .bottomBar) {
LiveVideoOptionsView()
}
}
}
}
/// Changes the track visibility for a participant (not visible if they go off-screen).
/// - Parameters:
/// - participant: the participant whose track visibility would be changed.
/// - isVisible: whether the track should be visible.
private func changeTrackVisibility(_ participant: CallParticipant?, isVisible: Bool) {
guard let participant else { return }
Task {
await call.changeTrackVisibility(for: participant, isVisible: isVisible)
}
}
}
```
To summarize the sample code above, we create an instance of the `StreamVideo` client and a user with a hard-coded token and API key. We check to see if a call has not been created, and then we create and join it to display a live video. The method, `call.join(create: true)` allows real-time sound and video transmission. With the above sample code, our TikTok clone app is ready. Let’s implement live video recording in the next step.
## Add a Recording Functionality
When users start a live video, the SDK provides an easy way to [integrate recording](https://getstream.io/video/docs/ios/advanced/recording/). This feature allows users to record ongoing audio and video activities. To use the SDK's recording functionality, create a state variable to toggle between the user's recording and non-recording states `@State private var isRecording = false`. Then, add a button to start and stop recording.
```swift
Button {
isRecording.toggle()
if isRecording {
func startRecording() {
Task {
try await call.startRecording()
}
}
} else {
func stopRecording() {
Task {
try await call.stopRecording()
}
}
}
} label: {
RecordingView()
}
.buttonStyle(.plain)
```
You can see the recording implementation in `CreateJoinLiveVideo.swift` you added in the previous section.
Congratulations 👏. You deserve applause for following this step-by-step guide to building a fully functioning TikTok-like live video using SwiftUI and Stream's [iOS Video SDK](https://getstream.io/video/sdk/ios/).
## What’s Next?
This tutorial guided you in integrating short-form video support into a SwiftUI app to build a functioning TikTok clone. However, we did not cover the endless scrollable video feeds feature using a third-party activity feeds solution. That will come in a future tutorial. You can easily integrate activity feeds in your app with the [Stream Activity Feeds API](https://getstream.io/activity-feeds/.
Stream’s Video SDK has much more to offer you as a developer. Head to the [iOS docs](https://getstream.io/video/docs/ios/) to learn more about integrating [screen sharing](https://getstream.io/video/docs/ios/advanced/screensharing/), initiating calls from [deep links](https://getstream.io/video/docs/ios/advanced/deeplinking/), [video/ audio filters](https://getstream.io/video/docs/ios/advanced/apply-video-filters/), and more.
| amosgyamfi |
1,893,753 | My First Post | This is the content of the post written in Markdown. | 27,775 | 2024-06-19T14:53:33 | https://dev.to/techsalesjobsus/my-first-post-e7k | api, javascript, tutorial | This is the content of the post written in Markdown. | techsalesjobsus |
1,893,752 | Características de la gestión de proyectos en construcción | La gestión de proyectos en construcción es una disciplina compleja que abarca diversas áreas de... | 0 | 2024-06-19T14:52:13 | https://dev.to/selmagalarza/caracteristicas-de-la-gestion-de-proyectos-en-construccion-2a9l | construccion, gestióndeproyectos | La gestión de proyectos en construcción es una disciplina compleja que abarca diversas áreas de conocimiento y habilidades. La industria de la construcción requiere una planificación meticulosa y una ejecución precisa para asegurar el éxito de un proyecto. Este artículo examina en detalle las características esenciales de la gestión de proyectos en construcción, destacando los aspectos más relevantes para lograr un resultado exitoso.
## 1. Planificación y Programación
La planificación es la piedra angular de cualquier proyecto de construcción. Implica la definición clara de los objetivos, el alcance del proyecto y los recursos necesarios. La programación, por otro lado, se refiere a la elaboración de un cronograma detallado que contemple todas las actividades a realizar, asignando tiempos específicos y secuencias lógicas para cada tarea. Un [diagrama de Gantt](https://write.as/leonel-baeza-espinosa/diagramas-de-gantt-en-proyectos-de-construccion) es muy adecuado para esto; ofrece una imagen clara de las etapas del trabajo en la construcción;
La planificación eficaz asegura que todas las partes interesadas tengan una comprensión clara del proyecto desde el inicio. La programación detallada permite identificar posibles cuellos de botella y ajustar el plan antes de que surjan problemas en la fase de ejecución.
## 2. Gestión de Recursos
La [gestión de recursos](https://slack.com/intl/es-es/blog/productivity/gestion-de-recursos) es otra característica crucial en la construcción. Involucra la asignación y supervisión de todos los recursos necesarios, incluyendo materiales, equipos y mano de obra. La gestión eficiente de los recursos garantiza que no haya desperdicios y que cada elemento esté disponible cuando se necesite.
Es fundamental realizar un seguimiento continuo de los recursos, ajustando según sea necesario para evitar demoras. La tecnología ha facilitado este proceso mediante el uso de software de gestión que permite monitorear y optimizar el uso de recursos en tiempo real.
## 3. Presupuesto y Control de Costos
La gestión financiera es vital en los proyectos de construcción. Elaborar un presupuesto preciso y mantener un control riguroso de los costos es esencial para evitar desviaciones financieras que puedan comprometer el proyecto.
El control de costos implica la supervisión constante del gasto y la comparación con el presupuesto inicial. Las variaciones deben ser identificadas y gestionadas rápidamente para minimizar su impacto. Las herramientas de software también juegan un papel importante aquí, proporcionando datos actualizados y facilitando la toma de decisiones informadas.
## 4. Gestión de la Calidad
La calidad es un aspecto no negociable en la construcción. La gestión de la calidad implica asegurarse de que todos los materiales y procesos cumplan con los estándares y especificaciones requeridos.
Esto incluye la inspección y prueba de materiales, la supervisión de las prácticas de construcción y la realización de auditorías de calidad regulares. El objetivo es garantizar que el producto final sea seguro, duradero y cumpla con las expectativas del cliente.
## 5. Gestión de Riesgos
Identificar, evaluar y gestionar riesgos es esencial para evitar problemas que puedan afectar el desarrollo del proyecto. La gestión de riesgos en construcción implica prever posibles problemas y desarrollar planes de contingencia para mitigarlos.
Esto puede incluir riesgos relacionados con la seguridad, financieros, ambientales o de cumplimiento normativo. Una evaluación de riesgos exhaustiva permite al equipo de proyecto estar preparado para cualquier eventualidad y responder de manera efectiva.
## 6. Coordinación y Comunicación
La construcción involucra a múltiples partes interesadas, incluyendo arquitectos, ingenieros, contratistas y clientes. Una comunicación clara y efectiva es fundamental para asegurar que todos estén alineados y trabajen hacia un objetivo común.
La coordinación efectiva requiere la implementación de sistemas de comunicación que faciliten el intercambio de información y la resolución de problemas en tiempo real. Reuniones regulares y el uso de plataformas colaborativas pueden mejorar significativamente la comunicación y coordinación entre los equipos.
## 7. Gestión de la Seguridad
La [seguridad es una prioridad en cualquier proyecto de construcción](https://www.myserviceplatform.com/blog/seguridad-prioridad-construccion/). La gestión de la seguridad implica el establecimiento de protocolos y procedimientos para proteger a los trabajadores y evitar accidentes en el sitio de trabajo.
Esto incluye la capacitación de los empleados en prácticas seguras, la provisión de equipos de protección personal y la implementación de medidas preventivas. La seguridad no solo protege a los trabajadores, sino que también reduce el riesgo de retrasos y costos adicionales asociados con incidentes.
## 8. Cumplimiento Normativo
Los proyectos de construcción deben cumplir con una serie de normativas y regulaciones locales, estatales y federales. La gestión del cumplimiento normativo asegura que todas las actividades del proyecto se realicen conforme a la ley.
Esto implica mantenerse actualizado con los cambios en las regulaciones, obtener los permisos necesarios y realizar inspecciones regulares. El incumplimiento puede resultar en sanciones severas y retrasos significativos, por lo que es vital integrar el cumplimiento normativo en la planificación y ejecución del proyecto.
## 9. Tecnología y Innovación
El uso de tecnología avanzada ha transformado la gestión de proyectos en construcción. Desde software de gestión de proyectos hasta herramientas de modelado 3D, la tecnología permite una planificación más precisa, una ejecución más eficiente y una mejor gestión de los recursos.
La adopción de nuevas tecnologías e innovaciones puede mejorar la calidad y reducir los costos y tiempos de construcción. Es importante que los gestores de proyectos estén al tanto de las últimas tendencias y herramientas disponibles para integrar las mejores prácticas en sus proyectos.
## 10. Sostenibilidad
La sostenibilidad se ha convertido en un componente esencial de la gestión de proyectos en construcción. Esto implica la implementación de prácticas que minimicen el impacto ambiental, como el uso de materiales reciclados, la eficiencia energética y la reducción de residuos.
La construcción sostenible no solo beneficia al medio ambiente, sino que también puede resultar en ahorros a largo plazo y una mayor satisfacción del cliente. Integrar principios de sostenibilidad desde la etapa de planificación es crucial para el éxito de cualquier proyecto moderno.
## Conclusión
La gestión de proyectos en construcción es una tarea multifacética que requiere una combinación de habilidades técnicas y de gestión. La planificación detallada, la gestión eficiente de recursos, el control de costos, la garantía de calidad, la gestión de riesgos y la comunicación efectiva son algunos de los componentes esenciales para el éxito de un proyecto de construcción.
Además, la adopción de tecnologías avanzadas y prácticas sostenibles puede mejorar significativamente la eficiencia y calidad del proyecto. La clave del éxito en la gestión de proyectos de construcción radica en la capacidad de adaptarse a los desafíos y cambios, manteniendo siempre el enfoque en los objetivos del proyecto y las necesidades del cliente. | selmagalarza |
1,893,458 | Beyond the Game: Tracking Brand Awareness in Sports Streaming and Events | Introduction In recent years, the landscape of sports streaming and events has experienced... | 0 | 2024-06-19T14:50:01 | https://dev.to/api4ai/beyond-the-game-tracking-brand-awareness-in-sports-streaming-and-events-51b0 | brands, sport, streaming, logo | ## Introduction
In recent years, the landscape of sports streaming and events has experienced explosive growth. The global sports streaming market is projected to surpass $85 billion by 2025, driven by the surging demand for live sports content and the proliferation of digital platforms. This surge in popularity underscores the evolving ways fans engage with their favorite sports and teams, making it crucial for brands to establish a strong presence in this dynamic arena.
Measuring brand awareness in the context of sports streaming and events is not just a marketing necessity; it's a strategic imperative. High brand awareness can significantly enhance audience engagement, foster brand loyalty, attract lucrative sponsorship opportunities, and solidify market positioning. In a fiercely competitive industry, understanding how well your brand resonates with audiences can be the key to sustained success and growth.
In this blog post, we will explore why brand awareness is critical in the realm of sports streaming and events. We will introduce the concept of brand recognition technology for images, a transformative tool that is reshaping brand awareness measurement in the sports industry. By harnessing the power of artificial intelligence (AI), brand recognition technology offers a dynamic solution to the challenges of tracking brand logos and signage in dynamic and cluttered environments.
## Importance of Brand Awareness in Sports Streaming and Events
Brand awareness is a crucial element of any marketing strategy, especially in the competitive world of sports sponsorships and events. In these environments, the battle for consumer attention is intense, and a brand's visibility can greatly impact its market position. Prominent exposure during sports events can enhance recognition and recall among a wide and diverse audience. This visibility helps embed the brand in the minds of consumers, creating a strong association between the brand and the excitement, prestige, and passion that sports embody.
## How Brand Visibility Impacts Sponsorship ROI, Fan Engagement, and Brand Loyalty
**Sponsorship ROI:** High brand visibility during sports streaming and events can lead to a substantial return on investment for sponsors. When a brand is prominently displayed on athletes' uniforms, equipment, stadium signage, and digital overlays, it receives continuous exposure to millions of viewers. This visibility increases brand recall and can drive higher sales, justifying the investment in sponsorships. Furthermore, data-driven insights provided by brand recognition technology enable brands to accurately measure the effectiveness of their sponsorships, ensuring they achieve the best value for their investment.
**Fan Engagement:** Sports fans are known for their loyalty and enthusiasm. When a brand is consistently visible during the events they follow, it becomes part of the fan experience. Engaging fans through targeted campaigns and interactive content, informed by brand visibility data, enhances the connection between the brand and the audience. Brands can leverage these insights to create memorable experiences, such as social media interactions, exclusive offers, and gamified content, all of which increase fan engagement and affinity towards the brand.
**Brand Loyalty:** Continuous brand exposure during sports events builds familiarity and trust. When consumers repeatedly see a brand associated with their favorite sports and athletes, it reinforces a positive perception and loyalty towards the brand. This loyalty is crucial for long-term business success, as loyal customers are more likely to make repeat purchases, advocate for the brand, and contribute to sustained revenue growth.
Brand awareness is a critical metric for brands involved in sports sponsorships and events. The visibility of a brand during these high-profile events directly influences sponsorship ROI, fan engagement, and brand loyalty. By leveraging AI-based brand recognition technology, brands can not only measure their visibility with precision but also optimize their strategies to achieve maximum impact, ensuring they remain top-of-mind for consumers in the competitive sports industry.
## Methods to Measure Brand Awareness
Effectively measuring brand awareness in sports streaming and events requires a blend of traditional and modern techniques. Here, we explore several methods to gain a comprehensive understanding of brand visibility and impact.
### Surveys and Polls
**Pre-Event Surveys:** **Measuring Awareness Before an Event** Conducting surveys before an event helps establish a baseline of brand awareness. These surveys can ask participants about their familiarity with the brand, recognition of logos and slogans, and previous interactions. This data provides a benchmark against which post-event awareness can be compared.
**Post-Event Surveys:** **Assessing Changes in Awareness After an Event** Post-event surveys are crucial for understanding the impact of the event on brand awareness. These surveys should ask similar questions to the pre-event surveys to measure changes in recognition and recall. Additionally, they can include questions about participants' experiences and perceptions of the brand during the event.
**Continuous Polling:** **Using Regular Polls to Track Awareness Over Time** Regular polling helps track brand awareness trends over time. By conducting periodic surveys, brands can monitor fluctuations in awareness and engagement, allowing them to adjust their marketing strategies accordingly. Continuous polling provides ongoing insights into the effectiveness of brand initiatives and campaigns.
### Social Media Listening Tools
**Tool Selection: Choosing the Right Social Media Listening Tools**
Selecting the right tools for social media listening is essential. Tools like Brandwatch, Hootsuite, and Sprout Social offer comprehensive features for monitoring brand mentions, sentiment, and engagement across various platforms. Choose a tool that aligns with your specific needs and budget to ensure effective monitoring.
**Data Collection: Gathering Data from Various Social Media Platforms** Effective social media listening involves collecting data from a wide range of platforms, including Twitter, Facebook, Instagram, and YouTube. This data includes mentions, hashtags, comments, and shares. Collecting diverse data ensures a holistic view of brand awareness across different audiences.
**Analysis: Interpreting the Data to Gauge Brand Awareness**
Analyzing social media data involves examining metrics such as mention frequency, sentiment analysis, and engagement rates. Tools often provide dashboards that visualize these metrics, making it easier to interpret trends and insights. High mention frequency and positive sentiment are strong indicators of brand awareness.
### Web Analytics Tools
**Google Analytics: Tracking Web Traffic and User Behavior**
Google Analytics is a powerful tool for tracking web traffic and user behavior. By setting up custom dashboards and reports, you can monitor key metrics such as unique visitors, page views, and average session duration. Analyzing this data helps you understand how many people are visiting your site and how they are interacting with it.
**Custom Dashboards: Monitoring Key Metrics in Real-Time**
Custom dashboards in tools like Google Analytics allow you to monitor key metrics in real-time. These dashboards can be tailored to display the most relevant data for your brand, such as traffic sources, user demographics, and behavior flow. Real-time monitoring helps you quickly identify trends and make informed decisions.
**Campaign Tracking: Measuring the Effectiveness of Marketing Campaigns**
Setting up campaign tracking involves using UTM parameters and other tracking mechanisms to measure the effectiveness of specific marketing efforts. This allows you to see which campaigns drive the most traffic and engagement, helping to optimize future marketing strategies.
### Brand Tracking Studies
**Continuous Tracking: Monitoring Brand Awareness** Over Time
Continuous brand tracking studies involve regularly surveying a representative sample of your target audience to measure awareness and perception. These ongoing studies provide valuable data that allows you to track changes and trends over time, ensuring you stay informed about your brand's standing.
**Benchmarking: Comparing Your Brand's Performance Against Competitors**
Benchmarking involves comparing your brand awareness metrics with those of your competitors. This comparison helps identify areas where your brand excels or falls behind, offering insights for strategic adjustments to improve your market position.
**Trend Analysis: Identifying and Analyzing Long-Term Trends**
Trend analysis in brand tracking studies helps uncover long-term patterns and shifts in brand awareness. By analyzing these trends, you can gauge the impact of various marketing efforts and external factors on your brand’s visibility and reputation, enabling more informed decision-making for future strategies.
### Using Brand Recognition Technology
**Image and Video Recognition: Leveraging AI for Brand Analysis**
Brand recognition technology employs AI to analyze images and videos for brand logos, products, and other brand elements. These advanced AI tools can scan vast amounts of visual content, identifying where and how often your brand appears across various media.
**Real-Time Monitoring: Enhancing Brand Awareness Measurement**
Real-time monitoring with brand recognition technology provides immediate insights into brand visibility. This enables prompt adjustments to marketing strategies and enhances engagement by responding quickly to trends and mentions. Real-time data ensures an accurate and current understanding of brand awareness.
By adopting these methods, brands in the sports streaming and events industry can gain a deep understanding of their brand awareness. This comprehensive approach supports data-driven decisions, boosting brand visibility, engagement, and overall market presence.
## Understanding Brand Recognition Technology for Images
Brand recognition technology for images involves the use of advanced software and algorithms to identify, track, and analyze brand logos, symbols, and signage within digital images and videos. By leveraging machine learning and computer vision techniques, this technology can accurately recognize specific visual elements associated with a brand. This enables automated and precise monitoring of brand visibility across various media platforms.
### Image Recognition Technology: Benefits
The applications of image recognition technology in sports streaming and events are extensive, offering significant benefits for both brands and event organizers:
- **Real-Time Brand Visibility Tracking:** AI-based brand recognition technology enables real-time monitoring of brand logos and signage during live sports events. This allows brands to track their exposure instantaneously and make data-driven decisions on the fly.
- **Enhanced Sponsorship Evaluation:** By providing precise metrics on brand visibility, such as the frequency and duration of logo appearances, brands can accurately evaluate the effectiveness of their sponsorship investments.
- **Improved Fan Engagement:** Understanding when and where fans interact with brand elements during events helps tailor marketing strategies to enhance fan engagement. Brands can create more personalized and impactful fan experiences based on these insights.
- **Automated Compliance Monitoring:** Ensuring that brand logos and advertisements comply with sponsorship agreements is crucial. Image recognition technology automates this process, providing detailed reports on compliance and any discrepancies.
- **Competitive Analysis:** Brands can use this technology to monitor competitor visibility, gaining insights into competitor strategies and their impact on the audience. This information can inform competitive positioning and strategy adjustments.
- **Content Creation and Marketing:** By analyzing which moments generate the most brand visibility, marketers can create highlight reels and promotional content that maximizes brand exposure and resonates with the audience.
Incorporating AI-based brand recognition technology into sports streaming and events not only revolutionizes how brand awareness is measured but also empowers brands to optimize their presence, engagement, and return on investment in an increasingly competitive landscape.
## AI-Based Brand Recognition Solutions
In this article, we focus on AI-powered tools designed for brand mark and logo recognition, which are becoming indispensable for brands aiming to monitor their presence and impact across various platforms. Several well-known providers in this field offer unique features and capabilities. We will provide an overview of some of these prominent providers, discuss their key functionalities, and explore how they can enhance brand awareness and recognition in today's competitive market.
[**Google Cloud Vision API**](https://cloud.google.com/vision/docs/detecting-logos)
- **Key Features:** Comprehensive image analysis,supports logo detection, integration with other Google Cloud services, real-time processing
- **Accuracy Rates:** High accuracy due to extensive training on diverse datasets.
- **Scalability:** Highly scalable, suitable for handling large volumes of data and multiple concurrent streams.
- **Pricing Models:** Pay-as-you-go pricing model based on the number of images processed.
[**Microsoft Azure AI Vision**](https://learn.microsoft.com/en-us/azure/ai-services/computer-vision/concept-brand-detection)
- **Key Features:** Advanced image and video analysis, customizable training, integration with the Azure ecosystem, real-time recognition capabilities
- **Accuracy Rates:** High accuracy, leveraging Microsoft's extensive AI research and datasets.
- **Scalability:** Highly scalable, designed to handle large-scale implementations.
- **Pricing Models:** Subscription-based pricing with different tiers based on usage and features.
[**SmartClick**](uhttps://smartclick.ai/api/logo-detection/)
- **Key Features:** Real-time logo detection,customizable AI models, robust API support, high accuracy in various conditions
- **Accuracy Rates:** High accuracy, especially with custom training tailored to specific brands.
- **Scalability:** Suitable for both small and large-scale events, capable of supporting high data throughput.
- **Pricing Models:** Flexible pricing based on usage, with custom enterprise solutions available.
[**API4AI Brand Recognition API**](https://api4.ai/apis/brand-recognition)
- **Key Features:** Logo and brand detection, real-time processing, easy integration with existing systems, customizable models
- **Accuracy Rates:** High accuracy, with the ability to support new logos without additional actions.
- **Scalability:** Designed for scalability, suitable for implementations of various sizes.
- **Pricing Models:** Subscription-based pricing models.
[**Visua**](https://visua.com/technology/logo-detection-api)
- **Key Features:** Extensive logo and brand detection capabilities, customizable AI models, robust API integration, real-time analysis
- **Accuracy Rates:** High accuracy with advanced AI algorithms.
- **Scalability:** Scalable solution suitable for both small and large-scale events.
- **Pricing Models:** Subscription-based pricing with custom solutions for enterprise needs.
[**Hive**](https://thehive.ai/apis/logo-detection)
- **Key Features:** Comprehensive image and video analysis, supports logo detection, real-time processing, integration with other platforms
- **Accuracy Rates:** High accuracy leveraging Hive's proprietary AI technology.
- **Scalability:** Highly scalable, capable of processing large volumes of data.
- **Pricing Models:** Flexible pricing models based on usage and features.
[Amazon Rekognition](https://docs.aws.amazon.com/rekognition/latest/customlabels-dg/what-is.html)
- **Key Features:** Real-time image and video analysis, deep learning-based logo detection, integration with AWS ecosystem, extensive metadata extraction
- **Accuracy Rates:** High accuracy in identifying brand logos and signage.
- **Scalability:** Highly scalable, capable of processing large data volumes across multiple regions.
- **Pricing Models:** Pay-as-you-go pricing based on the number of images and videos analyzed.
## Conclusion
The potential of AI-based brand recognition technology in sports streaming and events is immense and transformative. This technology delivers precise, real-time metrics on brand visibility and engagement, allowing brands to optimize sponsorship strategies and enhance fan experiences. As the technology evolves, its influence on sports marketing will expand, creating new opportunities for brands to connect with their audience in more meaningful and impactful ways.
Given the substantial benefits and potential of AI-based brand recognition technology, it is crucial for brands and event organizers to test and select the right solutions tailored to their specific needs. Here are some steps to consider:
1. **Identify Objectives and Requirements:** Clearly define what you aim to achieve with brand recognition technology. Whether it's measuring brand visibility, enhancing fan engagement, or optimizing sponsorship ROI, having clear objectives will guide your choice of solution.
2. **Evaluate Available Solutions:** Review and compare the features, accuracy rates, scalability, and pricing models of popular AI-based brand recognition solutions such as [Google Cloud Vision API](https://cloud.google.com/vision/docs/detecting-logos), [Microsoft Azure AI Vision](https://learn.microsoft.com/en-us/azure/ai-services/computer-vision/concept-brand-detection), [SmartClick](https://smartclick.ai/api/logo-detection/), [API4AI Brand Recognition API](https://api4.ai/apis/brand-recognition), [Visua](https://visua.com/technology/logo-detection-api), [Hive](https://thehive.ai/apis/logo-detection), and [Amazon Rekognition](https://docs.aws.amazon.com/rekognition/latest/customlabels-dg/what-is.html).
3. **Conduct Pilot Tests:** Implement pilot tests with selected solutions to evaluate their performance in real-world conditions. This will help you understand their capabilities and limitations, ensuring you choose the most effective technology for your needs.
4. **Consider Integration and Scalability:** Ensure that the chosen solution can integrate seamlessly with your existing platforms and can scale to meet the demands of large-scale events and multiple streams.
5. **Leverage Expert Support:** Collaborate with solution providers and AI experts to optimize the setup and configuration of the technology. Their expertise can help you maximize the effectiveness and accuracy of the brand recognition technology.
6. **Regularly Review and Adjust:** Continuously monitor the performance of the technology and make necessary adjustments based on the insights gained. Regular updates and refinements will ensure that you stay ahead of the curve and fully leverage the technology's potential.
By adopting AI-based brand recognition technology, brands and event organizers can transform their approach to measuring brand awareness in sports streaming and events. This technology enhances sponsorship ROI and fan engagement, positioning brands to excel in the ever-evolving landscape of sports marketing. Testing and selecting the right solutions will be crucial to unlocking these benefits and maintaining competitiveness in the dynamic sports industry.
[More Stories about Cloud, Web, AI and Image Processing](https://api4.ai/blog)
| taranamurtuzova |
1,882,387 | Introducing solar-powered serverless! | Table of Contents Introduction Getting Started Custom Response Types POST Requests and... | 0 | 2024-06-19T14:49:39 | https://dev.to/josh_mo_91f294fcef0333006/introducing-solar-powered-serverless-34ma | programming, serverless, tutorial, rust | ## Table of Contents
- [Introduction](#intro)
- [Getting Started](#getting-started)
- [Custom Response Types](#custom-response-types)
- [POST Requests and JSON](#post-requests-and-json)
- [URL Query Parameters with Hyper](#url-query-parameter)
- [Deploying](#deploying)
- [Conclusion](#conclusion)
No, this isn't clickbait.
Most cloud providers claim to be green, but when you try to ask them seriously about their green credentials, they tend to not give you a very good response. In a world where climate change is becoming more and more of a problem, it's becoming increasingly important to be able to develop software that isn't just fast - it should also have a low memory footprint.
Enter [GreenCloudComputing (GCC)](https://www.greencloudcomputing.io/), a company that uses solar energy to power their servers! You can host your serverless functions with them, as well as sell them solar energy for those who are solar-savvy. They support multiple languages and you can also chain your serverless functions for an event-driven workflow.
As a short summary of how GCC works: their infrastructure revolves around a matching engine written in Go that simply matches queued requests to users' machines. As well as this, they also buy solar energy back from users to power the requests - so it's a win-win situation! They also support Rust, which ranks highly as the second most environmentally friendly programming language (after C/C++, of course!).
This guide will primarily focus on using GCC with Rust because Rust is my most used language (both professionally and for hobby projects), but they support a variety of languages:
- Golang
- Python
- Node.js
- C#
- Ruby
- And of course, Rust!
No Rust experience is required to make use of this short tutorial, although having some experience with Rust and/or other programming languages will make this much more pleasant.
<a id="getting-started"></a>
## Getting Started
To get started, it's pretty easy. You need to make an account on [their website](https://app.greencloudcomputing.io/signup), then download the CLI tool from the dashboard and add permissions for the file to be used as an executable. You can place the binary anywhere on your computer, but it's strongly suggested to alias the file as `gccli` (which we'll use to reference the executable throughout this article).
You will also need an API key which you can find by going to the Account tab after logging in, going to API Key then generating a new one. When you're logging in via the CLI (`gccli login`), you'll be prompted to enter your API key there.
If you're using AMD64 Linux, here's a `wget` command so you can save some time once you've signed in and got your API key:
```bash
wget https://dl.greencloudcomputing.io/gccli/main/gccli-main-linux-amd64 \
-O ~/.local/bin/gccli && chmod +x ~/.local/bin/gccli
```
This little Linux command does the following:
- Downloads the file straight from the source
- Puts it in `~/.local/bin`
- Allows it to be executed
This assumes you have `~/.local/bin` in your PATH.
### Using Rust on GreenCloud
You can then get started with using `gccli fx init`, which will ask for your API key from the website if you already haven't logged in using `gccli login`. For my own functions, I prefer to add the `-l rs` flag to `fx init` which automatically sets the language to Rust.
Once done, you'll have a new project that has the `hyper` crate pre-installed (v0.14 at the time of writing) with a single function. It takes a `hyper::Request` and returns a `hyper::Response`. Currently this is fixed - so for those who want to use their favourite frameworks, you may be out of luck.
We'll also install additional dependencies for serializing and deserializing JSON. You can copy the shell snippet below:
```bash
cargo add serde-json serde -F serde/derive
```
This adds the `serde-json` and `serde` libraries (with `serde` enabling the derive feature). Both of these libraries are used quite often in web services as you may find yourself deserializing requests to a known format (JSON, Messagepack, etc...) and serializing response bodies quite often.
Your initial `lib.rs` should look like this:
```rust
use hyper::{Body, Request, Response};
use hyper::header::{HeaderValue, CONTENT_TYPE};
const PHRASE: &str = "Hello from RUST by GreenCloud!";
pub async fn handle(_req: Request<Body>) -> Result<Response<Body>, hyper::Error> {
let mut response = Response::new(Body::from(PHRASE));
let content_type_header = HeaderValue::from_static("text/plain");
response.headers_mut().insert(CONTENT_TYPE, content_type_header);
response
}
```
Next we can try this out by using `gccli fx start`, which will start a local container we can interact with at `http://localhost:8080`. Using cURL should return the following:
```bash
Hello from RUST by GreenCloud!
```
<a id="custom-response-types"></a>
## Error Handling & Custom Response Types
Now that we've got our basic endpoint set up, let's set up some error handling. Because we're using a very low level library (and error types are not directly propagated back to the user), we will want to implement user-facing error types within our `Ok` branch.
By default, returning an error in this particular context will return 500 Internal Server Error with a blank page. We can remedy this by creating an Enum with several variants, that can be automatically turned into a `Response<Body>` - that will then be sent as a "successful" response.
See the example below:
```rust
#[derive(Debug)]
enum Resp {
OkThing(Thing),
NotPostMethod,
SerdeJsonError(serde_json::Error),
}
impl From<serde_json::Error> for Resp {
fn from(e: serde_json::Error) -> Self {
Self::SerdeJsonError(e)
}
}
```
Note that we've created a response that can represent the following:
- A successful response (in which it just echoes the JSON request body and sends it back)
- A "method not allowed" response (for example, on POST requests)
- A (de)serialization error.
To make turning our enum back into a `Response<Body>` as easy as possible, we can implement the `From<T>` trait which allows the use of `T::from()` to automatically convert a type to a known type, as long as it implements `From<T>`. Note however, that it also automatically implements `Into<T>` so we can convert the type back!
```rust
impl From<Resp> for Response<Body> {
fn from(resp: Resp) -> Response<Body> {
let (response_text, content_type, status_code) = match resp {
Resp::OkThing(thing) => (
serde_json::to_string_pretty(&thing).unwrap().into_bytes(),
HeaderValue::from_static("application/json"),
StatusCode::OK,
),
Resp::NotPostMethod => (
b"This endpoint only accepts POST methods!".to_vec(),
HeaderValue::from_static("text/plain"),
StatusCode::METHOD_NOT_ALLOWED,
),
Resp::SerdeJsonError(err) => (
format!("serde_json error: {err}").into_bytes(),
HeaderValue::from_static("text/plain"),
StatusCode::METHOD_NOT_ALLOWED,
),
};
let mut response = Response::new(Body::from(response_text));
response.headers_mut().insert(CONTENT_TYPE, content_type);
*response.status_mut() = status_code;
response
}
}
```
We can also implement this for `serde_json::Error` to make it easy to convert errors:
```rust
impl From<serde_json::Error> for Resp {
fn from(e: serde_json::Error) -> Self {
Self::SerdeJsonError(e)
}
}
```
<a id="post-requests-and-json"></a>
## POST requests and JSON
Next, we'll talk about making POST requests. When using the request body from `hyper`, we can split a given HTTP request into a byte-array body as well as a `Parts` struct (which essentially represents anything you want to know about a HTTP request besides the body).
```rust
let (parts, body) = request.into_parts();
match parts.method {
Method::POST => {}
_ => return Ok(Resp::NotPostMethod.into()),
}
let body = hyper::body::to_bytes(body).await?;
```
This does the following:
- Splits the request into two parts, the body itself and the `Parts` (everything else that isn't the body - ie headers, etc)
- If the HTTP method isn't a POST request, return a Method Not Allowed response through type conversion
- Turns the body into a `Vec<u8>` that we can then use later on. We use the question mark operator here to automatically propagate the error as this returns `hyper::Error`.
It should be noted that the original body gets consumed by `to_bytes()`! This is important to note as `Body` does **not** implement Clone or Copy.
Next, we'll define a type that can be deserialized from (and serialized to!) a request body (`Vec<u8>`). We already added the `serde` and `serde-json` crates, which makes this much easier to incorporate into our endpoint. It's important to note here that we added the `derive` feature for the `serde` crate. This allows the usage of derive macros, making it much easier to implement (de)serializing of structs and enums in Rust.
```rust
use serde::{Deserialize, Serialize};
#[derive(Deserialize, Serialize)]
struct Thing {
message: String,
}
```
Now we can write our whole handler function, which should now look like this (note that `Response<Body>` is still required as the return type due to GCC internal type constraints):
```rust
pub async fn handle(req: Request<Body>) -> Result<Response<Body>, ApiError> {
let (parts, body) = req.into_parts();
match parts.method {
Method::POST => {}
_ => return Ok(Resp::NotPostMethod.into()),
}
let body = hyper::body::to_bytes(body).await?;
let thing: Thing = match serde_json::from_slice(&body) {
Ok(res) => res,
Err(e) => return Ok(Resp::from(e).into()),
};
Ok(Resp::OkThing(thing).into())
}
```
As you can see, the way we have designed our endpoint code allows for minimal application code while leveraging the power of Rust traits for maximum efficiency.
<a id="url-query-params"></a>
## URL Query Parameters with Hyper
Additionally, we can also get URL parameters with `hyper` in three short lines. Before we do this, we'll want to add the `url` crate. This will allow us to parse the `Uri` type (from the `uri` field in the Parts struct) to a `Url`:
```bash
cargo add url
```
Next, we can write some code to do the following:
- Grabs the URI and turns it into a string
- Parses the resulting string to a URL
- Attempts to get the query pairs, iterate over them and collect all of the pairs into a key-value array (that is then serializable to JSON).
```rust
let uri_string = parts.uri.to_string();
let request_url = Url::parse(&uri_string).unwrap();
let params: Value = request_url.query_pairs().into_owned().collect();
```
On the user end when returned, this would simply appear as a nested JSON object.
To update our response parameter, let's also include our parameters within the response value:
```rust
#[derive(Serialize, Debug)]
struct MyResponse {
thing: Thing,
params: Value,
}
```
Next, you'll want to add `MyResponse` as a possible response to your `Resp` enum so that we can represent it as a possible response:
```rust
#[derive(Debug)]
enum Resp {
OkThing(Thing),
Ok(MyResponse),
NotPostMethod,
SerdeJsonError(serde_json::Error),
}
```
After this, we can simply add it as a matching arm to the `impl From<Resp> for Response<Body>` block:
```rust
// .. other stuff here
Resp::Ok(response) => (
serde_json::to_string_pretty(&response)
.unwrap()
.into_bytes(),
HeaderValue::from_static("application/json"),
StatusCode::OK,
),
// .. other stuff here
```
<a id="deploying"></a>
## Deploying
To deploy, all you need to write is `gccli fx deploy` and watch the magic happen! GreenCloud takes care of all of the deployment steps.
Functions can be made public (as HTTP endpoints) by using `gccli fx public`, which will generate a public endpoint for you that you can then use in other applications. Alternatively, you can also call them from the terminal using `cURL` or your favourite API tester like Postman. If you need to delete your endpoint, you can use `gccli fx public --delete`.
If you need to deploy but you're unable to reach the GreenCloudComputing CLI, you can also send your ZIP file from the Build button (from the Functions menu in the dashboard).
You can also schedule your function to fire at a given time - similar to a cronjob or scheduled task. Pretty cool feature to have - you can queue up a load of functions to be ran at different times but pass in different request bodies or URL parameters.
<a id="conclusion"></a>
## Conclusion
Thanks for reading! As with any new idea, the company have some exciting new features are on the horizon like WASM support, Carbon visualisation/reporting and GreenCloud Storage. If there's anything else you're interested in regarding GreenCloud, let me know and I can do a deeper dive into some of the other features the platform has. | josh_mo_91f294fcef0333006 |
1,893,750 | FastAPI Beyond CRUD Part 11 - JWT Authentication (Renew User Access Using Refresh Token Token) | In this video, we enhance our authentication system to enable users to renew their access using... | 0 | 2024-06-19T14:48:30 | https://dev.to/jod35/fastapi-beyond-crud-part-11-jwt-authentication-renew-user-access-using-refresh-token-token-21n9 | fastapi, python, apid, programming | In this video, we enhance our authentication system to enable users to renew their access using refresh tokens. Additionally, we refactor our code to implement checks for access and refresh tokens on their respective endpoints.
{%youtube JitVZm8rfks%} | jod35 |
1,893,602 | Advanced Techniques in Software QA Testing Training | Software Quality Assurance (QA) testing plays a pivotal role in ensuring that software applications... | 0 | 2024-06-19T13:30:54 | https://dev.to/pradeep_kumar_0f4d1f6d333/advanced-techniques-in-software-qa-testing-training-5c73 | Software Quality Assurance (QA) testing plays a pivotal role in ensuring that software applications meet stringent standards of functionality, performance, and reliability throughout the software development lifecycle. As technology continues to advance, the complexity of software systems escalates, emphasizing the necessity for adopting advanced techniques and methodologies in QA testing training to effectively address these evolving challenges.
## Importance of Advanced Techniques
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Given the increasing cybersecurity threats, security testing has become integral to QA processes. Advanced training includes techniques for vulnerability assessment, penetration testing, and compliance with standards like OWASP Top 10. Testers utilize tools such as Burp Suite, OWASP ZAP, and Nessus to fortify applications against potential security breaches effectively.
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## Advanced Methodologies and Approaches
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## Conclusion
Advanced techniques in [qa tester course online](https://www.h2kinfosys.com/courses/qa-online-training-course-details/) indispensable for QA professionals aiming to excel in today's challenging software development landscape. By mastering automation, performance testing, security testing, API testing, and embracing Agile and DevOps practices, testers can elevate their skills, improve software quality, and significantly advance their careers. Investing in advanced QA training not only prepares testers for existing challenges but also equips them to navigate future innovations in software testing effectively, contributing meaningfully to organizational success.
| pradeep_kumar_0f4d1f6d333 | |
1,893,749 | Callback function | This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer. ... | 0 | 2024-06-19T14:47:40 | https://dev.to/sadiku_eneye_55ac569131e1/callback-function-4obm | devchallenge, cschallenge, computerscience, beginners | *This is a submission for [DEV Computer Science Challenge v24.06.12: One Byte Explainer](https://dev.to/challenges/cs).*
## Explainer
<!-- Explain a computer science concept in 256 characters or less. -->
Imagine you hire a helper (callback function) to do a task (your code). You tell them (call them) when you're done with your part (argument). They do their thing (execute), then let you know (return value) when they are finished.
## Additional Context
<!-- Please share any additional context you think the judges should take into consideration as it relates to your One Byte Explainer. -->
The callback function helps to make code more concise and easier to understand by breaking complex tasks into simpler functions. When you call a function with a callback argument, you tell the main program to execute the callback function after it finishes its task. This way, your code becomes more organized and easier to follow.
<!-- Team Submissions: Please pick one member to publish the submission and credit teammates by listing their DEV usernames directly in the body of the post. -->
<!-- Don't forget to add a cover image to your post (if you want). -->
<!-- Thanks for participating! --> | sadiku_eneye_55ac569131e1 |
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