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1,917,508 | AI is the new "Blockchain"😬 and that's not good 😨 | The point of this post is to temper expectations for AI, not bash it. I know I Know, AI is amazing... | 0 | 2024-07-09T17:16:18 | https://dev.to/ducksauce88/ai-is-the-new-blockchain-and-thats-not-good-22d3 | ai, developer, bitcoin | The point of this post is to temper expectations for AI, not bash it.
I know I Know, AI is amazing and it has greatly increased our lives and how we work. I'm NOT saying AI isn't amazing, All I'm saying is there is a lot of fluff out there and expectations need to be set. This post should NOT be a discouragement for building your own AI to learn or grow, by all means PLEASE do that.
<img src="https://i.giphy.com/media/v1.Y2lkPTc5MGI3NjExdzFqaWFpb3gyeHl6NHd0dGdpYXFxOTY2Y2puemNvb3ByZGd1NXp5biZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/TmIoweifbKEnjoEp2J/giphy.gif" />
Remember not too long ago when Blockchain was the new hype? There were SO many companies hyping their new "Blockchain Tech" and it just felt so silly to me. Blockchain's true power isn't in the ledger, its in the decentralization of that ledger where it has its true power. So a company who is using a centralized Blockchain, what's the point? Just fire up a SQL database at that point. I'm a huge proponent of Bitcoin, I have since 2017. Bitcoin is savings technology to me, and a flat out cure for all the issues fiat currency provides.
(I do have to state, there is MUCH more utility and worth in AI vs Blockchain. I mean who ever needed a [Blockchain for dentists?](https://coinmarketcap.com/currencies/dentacoin/))
I see a lot of of people posting their AI tool or website that either is exactly like someone else's or it solves no real world problem or has limited value. These people may also be creating projects just for the sake of learning and development, which is also very admirable, but the ones who are trying to create a product that has been done plenty of other times, oof...this feels like the dot com bubble all over again.
<img src="https://i.giphy.com/media/v1.Y2lkPTc5MGI3NjExOThiMDl5N283eHphNndlMnkwYjFoczFhOGYweXE2d3RzYWtoOWYyZyZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/WxDZ77xhPXf3i/giphy.gif" />
Good news is, we did get a lot of good from the dot com bubble, like Amazon, eBay, etc. However there were a TON of companies created with zero worth behind them, or very limited value.
I'm not really able to see what is going on in tech, x (twitter) be sustained. At some point people will have to come to terms with, "Ok, maybe I don't need to make another AI that does xyz, there are already plenty out there that do".
## Hype Cycle
Hype cycle needs to be considered and talked about to properly gauge expectations of what may be on the horizon. Again I said "may be", I don't know the future. This is definitely not financial or investment advice.
The Gartner Hype Cycle is a graphical representation developed by the American research, advisory, and information technology firm Gartner. It represents the maturity, adoption, and social application of specific technologies. The cycle provides a view of how a technology or application will evolve over time, offering a source of insight to manage its deployment within the context of specific business goals.
The Hype Cycle is characterized by five key phases of a technology’s life cycle:
- **Innovation Trigger:** A potential technology breakthrough kicks things off. Early proof-of-concept stories and media interest trigger significant publicity. Often no usable products exist and commercial viability is unproven.
- **Peak of Inflated Expectations:** Early publicity produces a number of success stories, often accompanied by scores of failures. Some companies take action; most do not.
- **Trough of Disillusionment:** Interest wanes as experiments and implementations fail to deliver. Producers of the technology shake out or fail. Investment continues only if the surviving providers improve their products to the satisfaction of early adopters.
- **Slope of Enlightenment:** More instances of the technology’s benefits start to crystallize and become more widely understood. Second- and third-generation products appear from technology providers. More enterprises fund pilots; conservative companies remain cautious.
- **Plateau of Productivity:** Mainstream adoption starts to take off. Criteria for assessing provider viability are more clearly defined. The technology’s broad market applicability and relevance are clearly paying off.
**_This could help explain why we see a surge in AI-related projects and startups._**
*If we take a look at the Gartner Hype Cycle, and compare it to Nvidia's weekly chart, I'm sort of inclined to think we are at or near the Peak of Inflated Expectations.
<img src="https://s7280.pcdn.co/wp-content/uploads/2020/04/hype-1024x682.png" />
## Quality vs Quantity
I had this friend who wanted to start a jump park, it was just a drunken night business idea he had. We had about 4 or more of them in the immediate area. He also has kids and saw the opportunity in it since his kids loved the jump park. I explained to him I have seen a rise of these jump parks in our area, so why would we want to add another one? Will they stand the test of time? Is this hype? Will there be more built as well? This is how my mind works and it's the exact reason before I do something, I try to analyze its importance.
How many more jump parks do we need? Obviously that is an analogy for AI. Are we really getting the quality out of AI right now? I think we are trending in that direction for sure. I think what needs to happen first is a cleansing and then we can get to the REAL innovation. It’s the groundbreaking AI projects that will stand the test of time.
## Conclusion
Unfortunately, I feel like any real true innovation will be created by the Big Dawgs. Lets say you have a new AI service or tool, what is stopping MS, Apple, Google from implementing these services themselves? I DO NOT want to stifle anyone from building something, I just want to help people think more before they act as well as create realistic expectations of what is to come.
So tell me, do you agree? Disagree? Is there something I am missing? Am the fool for not building another AI chat bot or tool?
| ducksauce88 |
1,917,509 | Is Next.js 14 ready to be used in production for full ecommerce app?? | Hi Fellow Coders, I am to write an ecommerce website which should have good SEO, I don't know if... | 0 | 2024-07-09T15:09:51 | https://dev.to/nt24/is-nextjs-14-ready-to-be-used-in-production-for-full-ecommerce-app-43n2 | nextjs, explainlikeimfive, frontend, beginners | Hi Fellow Coders, I am to write an ecommerce website which should have good SEO, I don't know if developing a full fledged application in Next.js (with Redux,SSR, third party api calls, image storage or using S3 bucket, forms and all) is a good idea. Whats the experience with Next.js 14 with new app router... I am waiting for the answer ..46 people have already seen the post..but nobody has answered :( | nt24 |
1,917,510 | Introducing the new feature of DevOps Toolkit: Configuration Reusability 🚀 | Background In the world of DevOps, managing multiple tools on your computer can be quite a... | 0 | 2024-07-09T15:11:18 | https://dev.to/tungbq/introducing-the-new-feature-of-devops-toolkit-configuration-reusability-4mnn | devops, docker, tooling, opensource | ## Background
In the world of DevOps, managing multiple tools on your computer can be quite a challenge. I know this struggle firsthand. Setting up each tool, ensuring they work together, and keeping them updated is a time-consuming and often frustrating process.
That's why I created the [**DevOps Toolkit**](https://github.com/tungbq/devops-toolkit) to solve these problems. It's built on top of the [Docker](https://www.docker.com/) platform. I wanted to make it easier for developers and operations teams to get started with DevOps without the headaches of tool compatibility, setup, maintenance, and keeping everything up to date.
You could find my previous post for this tool [here](https://dev.to/tungbq/introducing-devops-toolkit-32fa)
## The DevOps Toolkit 🧰
- **GitHub repository:** [tungbq/devops-toolkit](https://github.com/tungbq/devops-toolkit)
- **Image on Dockerhub**: [tungbq/devops-toolkit:latest](https://hub.docker.com/r/tungbq/devops-toolkit)
- **Description:** DevOps toolkit is a container image for an all-in-one DevOps environment with popular tools like Ansible, Terraform, kubectl, helm, AWS CLI, Azure CLI, Git, Python, and more...
## Announcing Configuration Reusability
In our latest release, we're excited to introduce a powerful new feature: **Configuration Reusability**. This feature allows you to mount a configuration folder from the host to the container, enabling the reuse of configurations within the container, such as AWS and Azure login sessions. This enhancement simplifies the workflow, ensuring that you don't have to log in repeatedly and can maintain a consistent environment across multiple runs.
### Key Updates in This Release 🚀
- **Core Updates**:
- Updated tool versions
- **New Features**:
- Enabled toolkit container configuration reusable
- **Improvements**:
- Installed SSH client
- Ansible documentation improvement and minor image name change
- Updated deploy-docker-image-release.yml to replace deprecated set-output
- Updated instructions
- Adjusted note in quick start section
You can checkout all devops-toolkit releases and new features [**here**](https://github.com/tungbq/devops-toolkit/releases).
## Quick Start Guide 📖
Before you begin, ensure that you have [Docker](https://docs.docker.com/engine/install/) installed. It's also helpful to have a basic understanding of Docker concepts. If you are new to Docker, don't worry, you can refer to this [**docker document**](https://github.com/tungbq/devops-basic/tree/main/topics/docker) to get started.
### Step 1: Pull the Official Image from Docker Hub
DockerHub image: [tungbq/devops-toolkit](https://hub.docker.com/r/tungbq/devops-toolkit)
```bash
docker pull tungbq/devops-toolkit:latest
```
### Step 2: Start and Explore the Toolkit Container
To start using the toolkit, run the following command:
```bash
mkdir -p ~/.devops-toolkit-config
docker run --network host -it --rm -v ~/.devops-toolkit-config:/config tungbq/devops-toolkit:latest
```
This command mounts your host's `.devops-toolkit-config` directory to the container, allowing the reuse of configurations.
### Step 3: Work on the Toolkit Container
Once inside the container, you can try login to AWS and/or Azure with aws or az CLI:
```bash
root@docker-desktop:~# aws configure
root@docker-desktop:~# az login --use-device-code
```
Exit the container and move to the next step
### Step 4: Verify the Configuration Reusability
Run the new container, you can find your previous configurations without login or configure again:
```bash
docker run --network host -it --rm -v ~/.devops-toolkit-config:/config tungbq/devops-toolkit:latest
root@docker-desktop:~# aws configure list
root@docker-desktop:~# az account show
```
Similar feature will happen with other tools like Ansible/Terraform/...
## Conclusion
In summary, the DevOps Toolkit simplifies the complexities of managing multiple DevOps tools and keeping them updated, in this new **Configuration Reusability** feature it will help us more. If you're interested, give it a try, share your feedback, and let's continue improving together. Happy coding! 💖
<table>
<tr>
<td>
<a href="https://github.com/tungbq/devops-toolkit" style="text-decoration: none;"><strong>Star devops-toolkit ⭐️ on GitHub</strong></a>
</td>
</tr>
</table>
| tungbq |
1,917,561 | Win2Asia: Agen Hiburan Online Terdepan di Asia | Selamat datang di Win2Asia, destinasi utama Anda untuk hiburan online terbaik di Asia! Win2Asia... | 28,008 | 2024-07-09T15:54:59 | https://win2asia.info | win2asia, win2, hiburan, hiburanonline | Selamat datang di [Win2Asia](https://kampret.online), destinasi utama Anda untuk hiburan online terbaik di Asia! Win2Asia dikenal sebagai agen hiburan online terdepan yang menawarkan berbagai pilihan permainan dan pengalaman yang tak tertandingi bagi para penggemar judi online. Dengan layanan yang luar biasa dan platform yang user-friendly, kami memastikan setiap pemain merasakan sensasi dan kenyamanan bermain yang maksimal.
Link Daftar dan Login : **[Win2Asia](https://s.id/win2-asia)**
Mengapa Memilih Win2Asia?
1. Koleksi Permainan Lengkap Kami menyediakan berbagai jenis permainan mulai dari taruhan olahraga, kasino online, permainan slot, hingga poker. Setiap permainan dirancang dengan grafis berkualitas tinggi dan gameplay yang menghibur untuk memberikan pengalaman bermain yang mendalam.
2. Keamanan Terjamin Keamanan adalah prioritas utama kami. Dengan sistem enkripsi canggih, Anda dapat yakin bahwa data dan transaksi Anda terlindungi dengan baik. Kami juga memiliki lisensi resmi dari otoritas judi terkemuka yang menjamin operasional kami yang sah dan transparan.
3. Layanan Pelanggan 24/7 Tim layanan pelanggan kami siap membantu Anda kapan saja, 24 jam sehari, 7 hari seminggu. Kami berkomitmen untuk memberikan solusi cepat dan efektif untuk setiap pertanyaan atau masalah yang Anda hadapi.
4. Promosi dan Bonus Menarik Nikmati berbagai promosi dan bonus menarik yang kami tawarkan. Mulai dari bonus sambutan bagi pemain baru, bonus deposit, hingga program loyalitas bagi pemain setia. Semua dirancang untuk memberikan nilai tambah bagi pengalaman bermain Anda.
5. Transaksi Mudah dan Cepat Kami menyediakan berbagai metode pembayaran yang aman dan cepat. Proses deposit dan penarikan yang mudah memastikan Anda dapat fokus pada permainan tanpa khawatir tentang transaksi.
Bergabunglah dengan Komunitas Win2Asia Tidak ada waktu yang lebih baik untuk bergabung dengan Win2Asia! Rasakan keseruan dan keuntungan bermain di platform hiburan online terdepan di Asia. Kunjungi situs kami hari ini dan mulailah petualangan bermain Anda dengan Win2Asia. Temukan mengapa ribuan pemain memilih kami sebagai agen hiburan online favorit mereka.
Win2Asia - Sensasi Bermain Tanpa Batas!
---------------------------------------
Jangan lupa untuk mengikuti media sosial kami untuk mendapatkan update terbaru tentang promosi, event, dan berita menarik lainnya. | win2asia |
1,917,512 | Every JS13K gadget all at once! | We’re celebrating the thirteenth edition of the js13kGames competition this year - one of the ways to... | 0 | 2024-07-09T15:16:19 | https://medium.com/js13kgames/every-js13k-gadget-all-at-once-8942e59e0c95 | js13k, competition, prizes, swag | ---
title: Every JS13K gadget all at once!
published: true
date: 2024-07-09 14:58:10 UTC
tags: js13k,competition,prizes,swag
canonical_url: https://medium.com/js13kgames/every-js13k-gadget-all-at-once-8942e59e0c95
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/bel54yj6rrs2zebq2ix7.jpg
---
We’re celebrating the **thirteenth** edition of the [js13kGames](https://js13kgames.com) competition this year - one of the ways to do that is to offer you **ALL the swag** we have left from previous years like floppy disks, VR cardboards, CDs, magnets, pens, keychains, and more.
Top 100 winners will get a unique t-shirt as always (more on that later), and while we usually add one gadget to the package, this year we’ll pack **AS MANY GADGETS AS WE CAN** from the remaining stash until it runs out to zero, because why not? Those are:
- 10 floppy disks (2014)
- 13 medals (2023)
- 20 VR cardboards (2017)
- 40 CDs (2018)
- 70 keychains (2021)
- 100 old-school stickers (2013)
- 100 magnets and bottle openers (2019)
- 100 pens (2020)
- 100 coasters (2022)
- 100 glitter stickers (2022)
- 100 pins (2023)
- 100 patches (2023)
- 100 hologram stickers (2024)
So, if you’ll end up in top10, adding the brand new holo stickers this year, you’ll get **THIRTEEN different gadgets in your swag package**!
Those will be awarded based on the overall standings, and WebXR category will get VR cardboards exclusively. You’ll have a unique opportunity to grab those and expand or complete your collection, as they’re manufactured only for the [js13kGames](https://js13kgames.com) competition winners and are not available anywhere else.
Ps. Floppy disks (with all the 2014 games on them) might not work anymore given how old they are, no idea about CDs though - you’ll have to check that yourself.
* * * | end3r |
1,917,513 | GPT-40 instantly processed visual information | Using a webcam, GPT-40 instantly processed visual information, reading text and providing accurate... | 0 | 2024-07-09T15:23:02 | https://dev.to/dipakahirav/gpt-40-instantly-processed-visual-information-528l | ai, chatgpt, openai, gpt3 | Using a webcam, GPT-40 instantly processed visual information, reading text and providing accurate summaries far faster than humans, proving its advanced capabilities.
please subscribe to my [YouTube channel](https://www.youtube.com/@DevDivewithDipak?sub_confirmation=1
) to support my channel and get more web development tutorials.
| dipakahirav |
1,917,514 | The Future of Software Architecture? Exploring Uber's Domain-Oriented Model | Software architecture plays a crucial role in modern technology. It acts as the backbone of any... | 0 | 2024-07-09T15:15:40 | https://dev.to/marufhossain/the-future-of-software-architecture-exploring-ubers-domain-oriented-model-20lm | Software architecture plays a crucial role in modern technology. It acts as the backbone of any application, dictating how it functions, scales, and evolves. Among the many architectural models, Uber's domain-oriented model stands out as a beacon of innovation. This article dives into how this model is shaping the future of software architecture.
### Background
Traditional software architectures, like monolithic and microservices models, have dominated the industry for years. Monolithic architectures bundle all services into a single, large application, making it hard to manage and scale. Microservices architectures, on the other hand, break down applications into smaller, independent services. However, these models often struggle with complexities when dealing with large-scale systems.
The need for more advanced architectures becomes apparent when companies like Uber seek to scale efficiently. Uber's domain-oriented model answers this call, offering a fresh perspective on software architecture.
### Uber’s Domain-Oriented Architecture
Domain-oriented architecture focuses on dividing a system into distinct domains, each representing a specific business function. Unlike traditional models, it organizes services around business capabilities rather than technical aspects.
Uber implemented this model to manage its diverse services. Domains at Uber include ride-sharing, food delivery, and logistics. Each domain operates as a semi-independent unit, allowing for better management and scalability. This structure enables teams to work autonomously, speeding up development and deployment.
### Key Components of Uber’s Domain-Oriented Model
**Domain Services**
Domain services form the core of Uber's architecture. Each service addresses a specific business need, such as processing payments or managing driver information. By focusing on business capabilities, Uber ensures each service remains efficient and manageable.
**Inter-Domain Communication**
Effective communication between domains is vital. Uber uses well-designed APIs to enable seamless data exchange. This setup ensures services remain decoupled yet capable of interacting when necessary. Maintaining data consistency across domains becomes easier with this approach.
**Data Management**
Data management within Uber’s model involves careful planning. Each domain handles its data independently, reducing the risk of conflicts. Strategies for data storage, access, and synchronization ensure information remains accurate and up-to-date.
### Challenges and Solutions
Uber faced several challenges while adopting the domain-oriented model. Technical hurdles included ensuring seamless communication and data consistency. Organizational challenges involved aligning different teams to work within their domains without overlap.
To overcome these challenges, Uber implemented robust solutions. For communication, they designed efficient APIs and used reliable messaging systems. To manage data, they employed strategies ensuring synchronization and consistency. Organizationally, they encouraged collaboration and clear boundaries between teams.
### Impact on the Future of Software Architecture
Uber's success with the domain-oriented model influences many companies in the tech industry. Organizations observe Uber's achievements and adopt similar approaches to enhance their systems.
Current trends in software architecture show a shift towards domain-oriented models. This shift promises better scalability, flexibility, and team autonomy. Future developments will likely build on these principles, driving further innovation.
### Conclusion
In summary, Uber’s domain-oriented architecture offers a revolutionary approach to [system design Uber](https://www.clickittech.com/application-architecture/system-design-uber/?utm_source=backlinks&utm_medium=referral). By focusing on business domains, Uber achieves scalability, flexibility, and improved team autonomy. This model sets a new standard for the future of software architecture. For those interested in advancing their projects, exploring domain-oriented architecture provides a promising path forward. | marufhossain | |
1,917,516 | Git branch upstreaming | hey folks, if you tried to do a git pull and you came across such a response where the command did... | 0 | 2024-07-09T15:16:30 | https://dev.to/mrjahanzeb/git-branch-upstreaming-28b3 | git, upstream, webdev | hey folks, if you tried to do a `git pull` and you came across such a response where the command did not worked and asked you to set the upstream branch then you are at right place.
git pull error message
```
You asked me to pull without telling me which branch you
want to merge with, and 'branch.uat.merge' in
your configuration file does not tell me, either. Please
specify which branch you want to use on the command line and
try again (e.g. 'git pull <repository> <refspec>').
See git-pull(1) for details.
If you often merge with the same branch, you may want to
use something like the following in your configuration file:
[branch "test22"]
remote = <nickname>
merge = <remote-ref>
[remote "<nickname>"]
url = <url>
fetch = <refspec>
See git-config(1) for details.
```
here are the following steps to fix it:
```
git branch --set-upstream test02 origin/test02
```
and after that try this command again
```
git pull
```
:tada: here you go with a working upstream branch
| mrjahanzeb |
1,917,517 | How to Start a Payment Company | Borderpal.co by Errandpay.com Flashy new tech companies and cutting-edge tech get a lot of buzz. But... | 0 | 2024-07-09T15:17:03 | https://dev.to/borderpal/how-to-start-a-payment-company-1fmc | Borderpal.co by Errandpay.com
Flashy new tech companies and cutting-edge tech get a lot of buzz. But for investors, the real excitement lies in booming tech hubs, areas where new companies are constantly popping up, fueled by money from around the world. These up-and-coming hubs offer a chance for quick profits compared to the crowded tech industries in more advanced markets.
That has been the tale of fintech in Africa over the past few years. Many in the global investment community have looked at the continent as the “future” or “next frontier” of financial technology, with investments flooding into the sector at an unprecedented rate. From 2016 to 2022, funding for African startups grew 18.5x, 45% of which was attributable to fintech per a McKinsey report. And in the eight years to 2023, nearly $4 billion in equity funding was poured into fintech startups while the sector accounted for around half of the total financing raised last year.
The surge in funding is partly behind the boom in Africa’s fintech, propelling it to rank as one of the fastest-growing in the world. But the concentration of investor capital on a select few players (in 2023, 75% of all equity funding secured by African fintech startups went to just 10 companies) has inadvertently made the sector a “land of giants” of some sort – a top-heavy ecosystem that may overlook a vast untapped potential.
A handful of well-known names dominate fintech headlines and funding. Companies like Flutterwave, Chipper Cash, MNT Halan, TymeBank, Wave, Jumo, and OPay have become household names, nearly all valued at over $1 billion. While their success is commendable, this concentration of resources raises a crucial question about the broader impact on financial inclusion across the continent. It limits innovation and creates a narrow funnel for financial services distribution, potentially leaving millions underserved.
Despite the growth of fintech, financial exclusion remains a significant challenge in Africa. Sub-Saharan Africa’s banked population has jumped from only 23% of the population in 2011 but most Africans still do not have a bank account. Around 360 million adults in the region do not have access to any form of account – roughly 17% of the total global unbanked population, per World Bank estimates. This vast number represents not just a challenge, but an enormous opportunity for a different kind of financial innovation and venture building.
"Undiscovered Founders"
Traditional financial institutions and even fintech startups have struggled to reach these populations due to various factors, including low urbanisation rates, infrastructure limitations, high operational costs, and a lack of tailored products. This is where the power of undiscovered founders lies. These are the pastors, community leaders, and small business owners who have established trust, credibility, and deep connections within their local communities but may lack the technical expertise or capital to launch fintech ventures. They understand the financial needs and challenges faced by their neighbors, acting as bridges between the formal and informal financial sectors.
The power of these untapped networks cannot be overstated. In many African communities, trust is currency, and these leaders have spent years building social capital. For instance, a pastor in a rural Nigerian village might have more influence over financial decisions in their community than any glossy marketing campaign from a Lagos-based fintech company.
While these potential founders hold immense potential through their network and trust, they face significant challenges in leveraging these to provide tech-driven financial services. Access to capital is a major obstacle. Banks view them as high-risk borrowers while traditional venture capital rarely reaches these individuals, making it difficult to secure funding for starting or expanding financial service offerings. In addition, many lack the technical skills to build and maintain fintech platforms while navigating the complex world of financial regulations can be daunting.
Here's where the concept of white-labeling emerges as a game-changer. Put simply, white labeling is the practice of one company making a product or service that other companies rebrand and sell as their own. This model could be adapted to empower undiscovered founders by providing them with ready-made, compliant fintech solutions (technological infrastructure and core services) that they can brand and distribute within their networks. Imagine a community leader partnering with a fintech company to offer their congregation or local businesses branded mobile wallets or microloans. The established company handles the complex back-end technology and regulatory compliance, while the community leader leverages their trusted network for customer acquisition.
This approach solves several problems simultaneously; undiscovered founders get affordable access to advanced technology, leverage existing trust networks for customer acquisition, and ensure regulatory compliance through the central platform. It also offers a distinct advantage over traditional funding models. Empowering multiple "mini-startups" across the continent through this model could prove more cost-effective than pouring resources into a single large-scale venture.
The analogy of Coca-Cola's distribution system comes to mind. Its success in reaching even the most remote parts of Africa is attributed to its micro-distribution centers (MDCs) in Africa—small hubs that distribute beverages to small retailers. There are over 3,000 of those, and are normally run by individuals who live in the community, they employ local people and handle the last-mile distribution. They create around 20,000 jobs and generate millions of dollars in annual revenue. Similarly, empowering undiscovered founders creates a capillary network of financial service providers, reaching the farthest corners of the continent.
Consider the cost-effectiveness: Imagine funding 100 local leaders, each reaching 1,000 individuals, compared to funding one large fintech startup aiming to reach 100,000. The white-labeling model fosters a more cost-efficient and geographically expansive approach to financial inclusion. Instead of one company trying to penetrate diverse markets, hundreds or thousands of local leaders could adapt services to their specific communities.
Beyond Financial Inclusion
Increasing account ownership and usage could increase GDP by up to 14% in economies like Nigeria. By leveraging undiscovered founders, we could accelerate this growth while ensuring it's more evenly distributed. However, the implications of this model extend far beyond just increasing access to bank accounts or broad financial services.
By empowering local leaders as fintech distributors, we could see increased job creation as each mini-startup creates multiple jobs within their community. Profits from financial services would stay within local communities, local founders would be best positioned to understand and meet the specific needs of their communities thereby creating more tailored products
As trusted figures introduce these services, they could play the crucial role of financial educators, dispelling myths and building trust around formal financial services. Financial literacy is crucial for making informed financial decisions and avoiding predatory lending practices. Undiscovered founders can bridge the knowledge gap, fostering a financially responsible citizenry.
While promising, this model is not without challenges. Ensuring quality control across numerous mini-startups, managing regulatory compliance, and preventing fraud are all significant considerations. There's also the question of how to identify and vet potential undiscovered founders but these challenges are not insurmountable. With proper systems in place, including rigorous vetting processes, ongoing training, and robust monitoring systems, these risks can be mitigated.
The concept of undiscovered founders represents a paradigm shift in how we think about fintech distribution in Africa. By leveraging existing trust networks and empowering local leaders, we can create a more inclusive, resilient, and far-reaching financial ecosystem.
This approach aligns with the African proverb, "If you want to go fast, go alone. If you want to go far, go together." While the current model of concentrated investment may lead to rapid growth for a few companies, empowering undiscovered founders could take us much further in achieving true financial inclusion.
As we look to the future of fintech in Africa, it's time to broaden our perspective. The next big innovation in financial inclusion might not come from a tech hub in Nairobi or Lagos but from a small shop owner in rural Tanzania or a community leader in suburban Ghana. By providing these undiscovered founders with the tools they need, we can unlock a new wave of innovation and inclusion, bringing financial services to millions who have been left behind by traditional models.
The potential is enormous – not just for financial returns, but for social impact, economic empowerment, and the realization of Africa's full potential in the global digital economy. It's time to discover the undiscovered and rewrite the story of fintech in Africa.
| borderpal | |
1,917,518 | The Complex World of Marine Salvage: An Educational Insight | Marine salvage is a field that straddles the line between adventure and necessity, blending the... | 0 | 2024-07-09T15:17:17 | https://dev.to/grace_janice_bea4163177b3/the-complex-world-of-marine-salvage-an-educational-insight-f4a |
Marine salvage is a field that straddles the line between adventure and necessity, blending the romance of high seas with the pragmatism of engineering and law. It involves the recovery of ships, cargo, and other property after a shipwreck or other maritime accident. The purpose of this article is to shed light on the intricacies of marine salvage, elucidating its importance, methods, legal frameworks, and challenges.
**The Importance of Marine Salvage**
Marine salvage plays a crucial role in the maritime industry for several reasons:
Environmental Protection: Salvaging a ship quickly and efficiently can prevent oil spills, hazardous material releases, and other environmental disasters. This is critical for preserving marine ecosystems and coastal areas.
Economic Recovery: Ships and their cargo represent significant financial investments. Salvage operations aim to recover as much value as possible, mitigating financial losses for shipowners and insurers.
Safety: Derelict ships can pose navigation hazards, endangering other vessels. Salvage operations help clear these hazards, ensuring safer maritime routes.
Legal and Insurance Implications: Marine salvage has legal and insurance dimensions, as salvage operations often involve claims for salvage rewards, which are incentives provided to salvors for their efforts.
**Methods of Marine Salvage**
Marine salvage operations vary based on the type of incident and the condition of the vessel. Some common methods include:
Refloating: When a ship runs aground, refloating involves techniques to lift and move the vessel back into deeper waters. This may include pumping out water, using cranes, or applying buoyancy aids.
Patch and Pump: For vessels that are partially submerged, temporary patches are applied to hull breaches, and water is pumped out to restore buoyancy.
Cargo Removal: In cases where the vessel is too damaged to refloat, salvors may remove cargo to prevent pollution and recover valuable goods.
Wreck [Marine Removal](https://resolvemarine.com/services-capabilities/salvage-wreck-removal): When a ship cannot be salvaged, it must be dismantled and removed. This involves cutting the wreck into manageable pieces for transportation and disposal.
Towing: Disabled vessels are often towed to safety using powerful salvage tugs. This method is employed when the vessel is still afloat but unable to navigate on its own.
**Legal Framework of Marine Salvage**
Marine salvage operates under a distinct set of legal principles that have evolved over centuries. Key aspects include:
Salvage Law: Salvage operations are governed by international conventions, such as the Salvage Convention 1989, which outlines the rights and obligations of salvors and shipowners. It ensures that salvors are fairly compensated for their efforts while emphasizing the importance of protecting the marine environment.
Salvage Awards: Salvors are typically entitled to a salvage award, which is a percentage of the value of the salvaged property. The award amount is influenced by factors such as the value of the salvaged property, the degree of danger involved, and the skill and effort required.
Lloyd’s Open Form (LOF): LOF is a widely used salvage contract that allows for "no cure, no pay" terms. This means that salvors are only paid if they successfully recover the vessel or cargo, providing a strong incentive for effective salvage operations.
Maritime Liens: Salvors often have a maritime lien on the salvaged property, giving them a legal claim to the property as security for their salvage award. This lien can be enforced through legal proceedings if necessary.
**Challenges in Marine Salvage**
Marine salvage is a demanding field with numerous challenges:
Technical Complexity: Salvage operations require specialized equipment and expertise. Salvors must be skilled in underwater welding, heavy lifting, diving, and other technical disciplines.
Environmental Risks: Salvage operations can inadvertently cause environmental harm if not carefully managed. This includes the risk of oil spills, disruption of marine habitats, and release of hazardous materials.
Weather and Sea Conditions: Salvors often work in harsh and unpredictable environments. Adverse weather and rough seas can complicate salvage efforts and pose significant safety risks.
Logistical Issues: Coordinating a salvage operation involves complex logistics, including mobilizing equipment, obtaining necessary permits, and ensuring the safety of personnel.
Legal Disputes: Salvage operations can lead to legal disputes over salvage awards, liability for damages, and the division of recovered property. Resolving these disputes requires a thorough understanding of maritime law.
**The Future of Marine Salvage**
The field of marine salvage continues to evolve, driven by advances in technology and changing environmental and economic priorities. Some trends and developments include:
Technological Innovations: New technologies, such as remotely operated vehicles (ROVs), autonomous underwater drones, and advanced lifting systems, are enhancing the efficiency and safety of salvage operations.
Environmental Focus: There is an increasing emphasis on environmentally responsible salvage practices. This includes minimizing ecological impacts, recovering and recycling materials, and adhering to stringent environmental regulations.
Collaborative Approaches: Salvage operations often involve collaboration between various stakeholders, including shipowners, insurers, government agencies, and environmental organizations. Effective communication and cooperation are essential for successful salvage efforts.
Training and Education: As the field becomes more specialized, there is a growing need for comprehensive training programs to develop skilled salvors. This includes both technical training and education in salvage law and environmental management.
**Conclusion**
Marine salvage is a vital and multifaceted field that ensures the safety, economic viability, and environmental integrity of maritime activities. It requires a blend of technical expertise, legal knowledge, and environmental awareness. By understanding the importance, methods, legal frameworks, and challenges of marine salvage, we can better appreciate the crucial role it plays in the maritime industry. As technology and environmental priorities continue to evolve, the field of marine salvage will undoubtedly face new challenges and opportunities, driving further innovation and collaboration in this essential sector. | grace_janice_bea4163177b3 | |
1,917,519 | Code Smell 257 - Name With Collections | Avoid Using the Prefix "Collection" on Properties TL;DR: Drop "collection" prefix for clarity. ... | 9,470 | 2024-07-09T15:17:18 | https://maximilianocontieri.com/code-smell-257-name-with-collections | webdev, beginners, programming, rust | *Avoid Using the Prefix "Collection" on Properties*
> TL;DR: Drop "collection" prefix for clarity.
# Problems
- Redundant Naming
- Verbose Code
- Reduced Readability
- Refactoring Challenges
- Coupled to implementation
# Solutions
1. Use Simple Names
2. Remove 'collection' [from the name](https://dev.to/mcsee/what-exactly-is-a-name-part-ii-rehab-20gd)
3. Use plural names without the word 'collection'
# Context
When you prefix properties with terms like "collection," you introduce redundancy and verbosity into your code.
This makes your code harder to read and maintain and adds unnecessary complexity.
Coupling the name to a collection implementation prevents you from introducing a proxy or middle object to manage the relation.
# Sample Code
## Wrong
[Gist Url]: # (https://gist.github.com/mcsee/b929bfe2ee406a7d9a822c5318db5b61)
```rust
struct Task {
collection_of_subtasks: Vec<Subtask>,
subtasks_collection: Vec<Subtask>,
}
impl Task {
fn add_subtask(&mut self, subtask: Subtask) {
self.collection_of_subtasks.push(subtask);
self.subtasks_collection.push(subtask);
}
}
```
## Right
[Gist Url]: # (https://gist.github.com/mcsee/1c4c774f018e5f6cde339148962a4562)
```rust
struct Task {
subtasks: Vec<Subtask>,
}
impl Task {
fn add_subtask(&mut self, subtask: Subtask) {
self.subtasks.push(subtask);
}
}
```
# Detection
[X] Automatic
You can add rules to your linter preventing these redundant names.
# Tags
- Naming
# Level
[X] Beginner
# AI Generation
AI code generators produce this smell if they try to over-describe property names.
They tend to generate overly verbose names to be explicit, which can lead to redundancy.
# AI Detection
AI tools can fix this smell if you instruct them to simplify property names. They can refactor your code to use more concise and clear names.
# Conclusion
Simplifying property names by removing prefixes like "collection" leads to more readable and maintainable code.
It would be best to focus on clear, direct names that communicate the purpose without redundancy.
# Relations
{% post https://dev.to/mcsee/code-smell-38-abstract-names-34ng %}
{% post https://dev.to/mcsee/code-smell-171-plural-classes-3d0i %}
{% post https://dev.to/mcsee/code-smell-113-data-naming-1bm9 %}
# More Info
{% post https://dev.to/mcsee/what-exactly-is-a-name-part-ii-rehab-20gd %}
# Disclaimer
Code Smells are my [opinion](https://dev.to/mcsee/i-wrote-more-than-90-articles-on-2021-here-is-what-i-learned-1n3a).
# Credits
Photo by [Karen Vardazaryan](https://unsplash.com/@bright) on [Unsplash](https://unsplash.com/photos/die-cast-car-collection-on-rack-JBrfoV-BZts)
* * *
> Good design adds value faster than it adds cost.
_Thomas C. Gale_
{% post https://dev.to/mcsee/software-engineering-great-quotes-26ci %}
* * *
This article is part of the CodeSmell Series.
{% post https://dev.to/mcsee/how-to-find-the-stinky-parts-of-your-code-1dbc %} | mcsee |
1,917,520 | imported auto parts | https://maps.google.com/maps?cid=11682291749944568516 | 0 | 2024-07-09T15:17:56 | https://dev.to/importedautoparts/imported-auto-parts-3fg4 | [https://maps.google.com/maps?cid=11682291749944568516](https://maps.google.com/maps?cid=11682291749944568516) | importedautoparts | |
1,917,521 | imported auto parts | https://drive.google.com/drive/folders/17nFFcdluc7DL3obJBH2qfzbJgMXieKsz?usp=drive_link | 0 | 2024-07-09T15:18:24 | https://dev.to/importedautoparts/imported-auto-parts-2ck6 | [https://drive.google.com/drive/folders/17nFFcdluc7DL3obJBH2qfzbJgMXieKsz?usp=drive_link](https://drive.google.com/drive/folders/17nFFcdluc7DL3obJBH2qfzbJgMXieKsz?usp=drive_link) | importedautoparts | |
1,917,523 | Fortisco Mobile Library Shelving Systems | Maximize Your Library's Space with Mobile Shelving Solutions In today’s libraries, space is often at... | 0 | 2024-07-09T15:19:38 | https://dev.to/bella_dw_dbb483e50c31a3a1/fortisco-mobile-library-shelving-systems-5gn2 | Maximize Your Library's Space with Mobile Shelving Solutions
In today’s libraries, space is often at a premium. At Fortisco, we offer [mobile library shelving](https://fortisco.com.my/our-products/mobile-library-shelving/) systems designed to optimize your available space while maintaining accessibility and ease of use. Our mobile shelving solutions allow you to store more materials in a smaller footprint, making it the ideal choice for libraries of all sizes.
Innovative Mobile Shelving for Modern Libraries
Fortisco’s mobile shelving systems are engineered for efficiency and versatility. With our mobile shelving, you can:
Increase Storage Capacity: Mobile shelving units can be moved to create compact, high-density storage, significantly increasing your library’s capacity.
Improve Accessibility: Despite the compact storage, our systems are designed for easy access. Simply move the shelving units to create an aisle where needed.
Enhance Organization: Keep your library organized with adjustable shelves and customizable configurations that adapt to your collection's needs.
Features of Fortisco Mobile Library Shelving
Our mobile library shelving systems are packed with features that make them the perfect solution for your library:
Smooth Operation: Equipped with advanced mechanisms for easy movement, our shelves glide effortlessly with minimal effort.
Safety Mechanisms: Built-in safety features ensure secure operation, protecting both users and materials.
Customizable Configurations: Adjustable shelves and various configurations allow you to tailor the system to your specific needs.
Durability: Made from high-quality materials, our mobile shelving units are designed to withstand the rigors of daily use in a busy library environment.
Benefits of Choosing Fortisco Mobile Shelving
When you choose Fortisco for your library’s mobile shelving, you are investing in a solution that offers numerous benefits:
Space Efficiency: Mobile shelving allows you to store more in less space, freeing up room for other activities or collections.
Enhanced User Experience: Easy access to materials improves the user experience, encouraging more frequent use of library resources.
Cost Savings: Maximize your existing space and defer the need for costly expansions or relocations.
Flexibility: As your collection grows or changes, our mobile shelving can be reconfigured to meet your evolving needs.
Sustainable and Innovative Design
At Fortisco, we are committed to sustainability. Our mobile shelving systems are designed with environmentally-friendly materials and manufacturing processes. By choosing Fortisco, you are supporting your library’s green initiatives while also investing in a durable, high-quality product.
Expert Support and Installation
Our team of experts is dedicated to ensuring your mobile shelving system meets all your needs. From the initial consultation through to installation and ongoing support, we are here to assist you every step of the way. We provide comprehensive training to ensure your staff can operate the system safely and efficiently.
Why Fortisco?
Industry Expertise: With years of experience, Fortisco brings unparalleled knowledge and skill to every project.
Quality Products: Our mobile shelving systems are built to last, using only the highest quality materials and components.
Customer Focus: We prioritize your needs, offering customized solutions and exceptional customer service.
Contact Us
Transform your library space with Fortisco’s mobile shelving systems. Contact us today to learn more about how our solutions can help you maximize space, enhance accessibility, and improve organization. Together, we can create a library environment that supports learning, exploration, and community engagement.
| bella_dw_dbb483e50c31a3a1 | |
1,917,524 | WiFi Scan React Native iOS | hi , need to scan nearby wifi networks within the app is it possible in ios , because need to share... | 0 | 2024-07-09T15:20:04 | https://dev.to/akilan_a_c9d54d84bbfc465b/wifi-scan-react-native-ios-1dp2 | reactnative, ios, react | hi , need to scan nearby wifi networks within the app is it possible in ios , because need to share wifi credentials to iot device via ble | akilan_a_c9d54d84bbfc465b |
1,917,530 | Introducing the New React MultiColumn ComboBox | TL;DR: The Syncfusion React MultiColumn ComboBox introduces advanced multi-column dropdown... | 0 | 2024-07-11T17:00:01 | https://www.syncfusion.com/blogs/post/new-react-multicolumn-combobox | react, development, web, ui | ---
title: Introducing the New React MultiColumn ComboBox
published: true
date: 2024-07-09 12:00:53 UTC
tags: react, development, web, ui
canonical_url: https://www.syncfusion.com/blogs/post/new-react-multicolumn-combobox
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/xz1gmeedncqu6z3d7zzh.png
---
**TL;DR:** The Syncfusion React MultiColumn ComboBox introduces advanced multi-column dropdown functionality, complete with customizable layouts, sorting, virtualization, and additional features. Let’s delve into its exceptional capabilities and the steps to get started.
We’re delighted to introduce the new Syncfusion [React MultiColumn ComboBox](https://www.syncfusion.com/react-components/react-multicolumn-combobox "React MultiColumn ComboBox component") component in the [Essential Studio 2024 Volume 2](https://www.syncfusion.com/forums/188642/essential-studio-2024-volume-2-main-release-v26-1-35-is-available-for-download "Essential Studio 2024 Volume 2") release.
The [React MultiColumn ComboBox](https://ej2.syncfusion.com/react/documentation/multicolumn-combobox/getting-started "Getting started with React MultiColumn ComboBox component") is a dropdown component that displays items in a detailed table-like format with multiple columns, offering more information than standard dropdown lists. It uses the Syncfusion [Data Grid](https://www.syncfusion.com/react-components/react-data-grid "React Data Grid component") component, which allows for displaying and managing complex data structures in an organized and efficient manner. This makes it ideal for apps that require handling extensive datasets with ease.
Let’s explore this new component in detail!
## Key features
The key features of the React MultiColumn ComboBox are as follows:
- [Customized column layouts](#Customized)
- [Organizing data with grouping](#Organizing)
- [Filtering](#Filtering)
- [Sorting](#Sorting)
- [Data virtualization](#Data)
- [Customizable templates](#Customizable)
### <a name="Customized">Customized column layouts</a>
The React MultiColumn ComboBox allows us to customize the column layouts based on our specific needs. This feature enables data to be displayed across multiple columns, enhancing the user experience by presenting complex datasets in an organized manner and making it easier for users to navigate and select the required information.
<figure>
<img src="https://www.syncfusion.com/blogs/wp-content/uploads/2024/07/Customized-column-layouts-in-React-MultiColumn-ComboBox.png" alt="Customized column layouts in React MultiColumn ComboBox" style="width:100%">
<figcaption>Customized column layouts in React MultiColumn ComboBox</figcaption>
</figure>
### <a name="Organizing">Organizing data with grouping</a>
By organizing the data into groups, we can categorize related items and make navigation easier and quicker. This is particularly useful when dealing with large datasets, as grouping related items can save time when scrolling through longer lists.
<figure>
<img src="https://www.syncfusion.com/blogs/wp-content/uploads/2024/07/Grouping-data-in-React-MultiColumn-ComboBox.png" alt="Grouping data in React MultiColumn ComboBox" style="width:100%">
<figcaption>Grouping data in React MultiColumn ComboBox</figcaption>
</figure>
### <a name="Filtering">Filtering</a>
Filtering allows us to search for specific items within the MultiColumn ComboBox based on the text input. As users type into the input field, the component dynamically filters the data to display only those items that match the entered text. This helps users locate the desired information without scrolling through extensive lists.
Refer to the following image.
<figure>
<img src="https://www.syncfusion.com/blogs/wp-content/uploads/2024/07/Filtering-data-in-React-MultiColumn-ComboBox.gif" alt="Filtering data in React MultiColumn ComboBox" style="width:100%">
<figcaption>Filtering data in React MultiColumn ComboBox</figcaption>
</figure>
### <a name="Sorting">Sorting</a>
Sorting arranges data in a specific order (ascending or descending) based on column values. In the React MultiColumn ComboBox, sorting allows users to organize data alphabetically, numerically, or by any other relevant criteria defined for the columns. Clicking the column header for the first time sorts the column in ascending order, clicking it again sorts it in descending order, and a third click clears the sorting. The available sort types are:
- Single column sorting
- Multiple column sorting
<figure>
<img src="https://www.syncfusion.com/blogs/wp-content/uploads/2024/07/Sorting-data-in-React-MultiColumn-ComboBox-1.gif" alt="Sorting data in React MultiColumn ComboBox" style="width:100%">
<figcaption>Sorting data in React MultiColumn ComboBox</figcaption>
</figure>
### <a name="Data">Data virtualization</a>
This feature dynamically loads and displays data as the user scrolls or interacts with the component rather than loading the entire dataset at once. This significantly reduces the initial load time, making the component more responsive. It improves performance by efficiently managing memory and processing power, especially with large datasets.
<figure>
<img src="https://www.syncfusion.com/blogs/wp-content/uploads/2024/07/Data-virtualization-feature-in-React-MultiColumn-ComboBox.gif" alt="Data virtualization feature in React MultiColumn ComboBox" style="width:100%">
<figcaption>Data virtualization feature in React MultiColumn ComboBox</figcaption>
</figure>
### <a name="Customizable">Customizable templates</a>
Customizable templates enable you to define how data should be displayed within the MultiColumn ComboBox. You can create templates for individual items, headers, and footers to provide a more customized and informative user interface. This ensures that the information is shown in a way that best suits your app’s needs.
Refer to the following image.
<figure>
<img src="https://www.syncfusion.com/blogs/wp-content/uploads/2024/07/Custom-templates-in-React-MultiColumn-ComboBox.png" alt="Custom templates in React MultiColumn ComboBox" style="width:100%">
<figcaption>Custom templates in React MultiColumn ComboBox</figcaption>
</figure>
## Supported platforms
We have introduced the new MultiColumn ComboBox component in the following platforms as part of the 2024 volume 2 release.
<table>
<tbody>
<tr>
<td width="199">
<p>Platform </p>
</td>
<td width="199">
<p>Demo </p>
</td>
<td width="201">
<p>Documentation </p>
</td>
</tr>
<tr>
<td width="199">
<p><a title="JavaScript MultiColumn ComboBox component" href="https://www.syncfusion.com/javascript-ui-controls/js-multicolumn-combobox" target="_blank" rel="noopener">JavaScript</a></p>
</td>
<td width="199">
<p><a title="JavaScript MultiColumn ComboBox demos" href="https://ej2.syncfusion.com/demos/#/material3/multicolumn-combobox/default.html" target="_blank" rel="noopener">JavaScript MultiColumn ComboBox demos</a></p>
</td>
<td width="201">
<p><a title="Getting started with JavaScript MultiColumn ComboBox" href="https://ej2.syncfusion.com/documentation/multicolumn-combobox/getting-started" target="_blank" rel="noopener">Getting started with JavaScript MultiColumn ComboBox</a></p>
</td>
</tr>
<tr>
<td width="199">
<p><a title="Angular MultiColumn ComboBox component" href="https://www.syncfusion.com/angular-components/angular-multicolumn-combobox" target="_blank" rel="noopener">Angular</a></p>
</td>
<td width="199">
<p><a title="Angular MultiColumn ComboBox demos" href="https://ej2.syncfusion.com/angular/demos/#/material3/multicolumn-combobox/default" target="_blank" rel="noopener">Angular MultiColumn ComboBox demos</a></p>
</td>
<td width="201">
<p><a title="Getting started with Angular MultiColumn ComboBox" href="https://ej2.syncfusion.com/angular/documentation/multicolumn-combobox/getting-started" target="_blank" rel="noopener">Getting started with Angular MultiColumn ComboBox</a></p>
</td>
</tr>
<tr>
<td width="199">
<p><a title="React MultiColumn ComboBox component" href="https://www.syncfusion.com/react-components/react-multicolumn-combobox" target="_blank" rel="noopener">React</a></p>
</td>
<td width="199">
<p><a title="React MultiColumn ComboBox demos" href="https://ej2.syncfusion.com/react/demos/#/material3/multicolumn-combobox/default" target="_blank" rel="noopener">React MultiColumn ComboBox demos</a> </p>
</td>
<td width="201">
<p><a title="Getting started with React MultiColumn ComboBox" href="https://ej2.syncfusion.com/react/documentation/multicolumn-combobox/getting-started" target="_blank" rel="noopener">Getting started with React MultiColumn ComboBox</a></p>
</td>
</tr>
<tr>
<td width="199">
<p><a title="Vue MultiColumn ComboBox component" href="https://www.syncfusion.com/vue-components/vue-multicolumn-combobox" target="_blank" rel="noopener">Vue</a></p>
</td>
<td width="199">
<p><a title="Vue MultiColumn ComboBox demos" href="https://ej2.syncfusion.com/vue/demos/#/material3/multicolumn-combobox/default.html" target="_blank" rel="noopener">Vue MultiColumn ComboBox demos</a> </p>
</td>
<td width="201">
<p><a title="Getting started with Vue MultiColumn ComboBox" href="https://ej2.syncfusion.com/vue/documentation/multicolumn-combobox/getting-started" target="_blank" rel="noopener">Getting started with Vue MultiColumn ComboBox</a></p>
</td>
</tr>
<tr>
<td width="199">
<p><a title="ASP.NET Core MultiColumn ComboBox component" href="https://www.syncfusion.com/aspnet-core-ui-controls/multicolumn-combobox" target="_blank" rel="noopener">ASP.NET Core</a></p>
</td>
<td width="199">
<p><a title="ASP.NET Core MultiColumn ComboBox demos" href="https://ej2aspnetcore.azurewebsites.net/aspnetcore/multicolumncombobox/defaultfunctionalities#/material3" target="_blank" rel="noopener">ASP.NET Core MultiColumn ComboBox demos</a></p>
</td>
<td width="201">
<p><a title="Getting started with ASP.NET Core MultiColumn ComboBox" href="https://ej2.syncfusion.com/aspnetcore/documentation/multicolumn-combobox/getting-started" target="_blank" rel="noopener">Getting started with ASP.NET Core MultiColumn ComboBox</a></p>
</td>
</tr>
<tr>
<td width="199">
<p><a title="ASP.NET MVC MultiColumn ComboBox component" href="https://www.syncfusion.com/aspnet-mvc-ui-controls/multicolumn-combobox" target="_blank" rel="noopener">ASP.NET MVC</a></p>
</td>
<td width="199">
<p><a title="ASP.NET MVC MultiColumn ComboBox demos" href="https://ej2aspnetmvc.azurewebsites.net/aspnetmvc/multicolumncombobox/defaultfunctionalities#/material3" target="_blank" rel="noopener">ASP.NET MVC MultiColumn ComboBox demos</a></p>
</td>
<td width="201">
<p><a title="Getting started with ASP.NET MVC MultiColumn ComboBox" href="https://ej2.syncfusion.com/aspnetmvc/documentation/multicolumn-combobox/getting-started" target="_blank" rel="noopener">Getting started with ASP.NET MVC MultiColumn ComboBox</a></p>
</td>
</tr>
</tbody>
</table>
## Getting started with the React MultiColumn ComboBox
We’ve seen the marvelous features of the React MultiColumn ComboBox component. Let’s see how to integrate it into our application.
### Step #1: Create a new React app
First, create a new React app by installing the [create-react-app](https://www.npmjs.com/package/create-react-app "create-react-app NPM package") NPM package in the desired location using the following command.
```
npx create-react-app my-app
```
### Step #2: Add the Syncfusion packages
The [NPM](https://www.npmjs.com/~syncfusionorg "syncfusionorg NPM package") public registry contains all the Syncfusion Essential JS 2 packages currently available. Use the following command to install the React MultiColumn ComboBox component.
```
npm install @syncfusion/ej2-react-multicolumn-combobox --save
```
### Step #3: Add the CSS references for the Syncfusion React components
After installing the NPM package, the CSS files for the Syncfusion React components will be available in the **../node modules/@syncfusion package** folder. Import the React MultiColumn ComboBox component’s required CSS references as follows in the **src/App.css** file.
```js
@import "../node_modules/@syncfusion/ej2-base/styles/material3.css";
@import "../node_modules/@syncfusion/ej2-inputs/styles/material3.css";
@import "../node_modules/@syncfusion/ej2-popups/styles/material3.css";
@import "../node_modules/@syncfusion/ej2-grids/styles/material3.css";
@import "../node_modules/@syncfusion/ej2-react-multicolumn-combobox/styles/material3.css";
```
### Step #4: Adding React MultiColumn ComboBox to the app
Now, import the **MultiColumnComboBoxComponent** from **ej2- react-multicolumn-combobox** package in the **App.tsx** file. Define each column using the **ColumnDirective** tag inside the **ColumnsDirective** tag, as shown in the following example.
```js
import { MultiColumnComboBoxComponent, ColumnsDirective, ColumnDirective } from '@syncfusion/ej2- react-multicolumn-combobox';
import * as React from "react";
import * as ReactDOM from "react-dom";
function App() {
// Define the array of object data.
const employeeData: Object[] = [
{ "EmpID": 1001, "Name": "Andrew Fuller", "Designation": "Team Lead", "Country": "England" },
{ "EmpID": 1002, "Name": "Robert", "Designation": "Developer", "Country": "USA" },
{ "EmpID": 1003, "Name": "John", "Designation": "Tester", "Country": "Germany" },
{ "EmpID": 1004, "Name": "Robert King", "Designation": "Product Manager", "Country": "India" },
{ "EmpID": 1005, "Name": "Steven Buchanan", "Designation": "Developer", "Country": "Italy" },
{ "EmpID": 1006, "Name": "Jane Smith", "Designation": "Developer", "Country": "Europe" },
{ "EmpID": 1007, "Name": "James Brown", "Designation": "Developer", "Country": "Australia" },
{ "EmpID": 1008, "Name": "Laura Callahan", "Designation": "Developer", "Country": "Africa" },
{ "EmpID": 1009, "Name": "Mario Pontes", "Designation": "Developer", "Country": "Russia" }
];
// Maps the appropriate column to fields property.
const fields: Object = { text: 'Name', value: 'EmpID' };
return (
<div id='timeline' style={{ height: "350px" }}>
<MultiColumnComboBoxComponent dataSource={this.employeeData} fields={this.fields}>
<ColumnsDirective>
<ColumnDirective field='EmpID' header='Employee ID' width={120}></ColumnDirective>
<ColumnDirective field='Name' header='Name' width={120}></ColumnDirective>
<ColumnDirective field='Designation' header='Designation' width={120}></ColumnDirective>
<ColumnDirective field='Country' header='Country' width={100}></ColumnDirective>
</ColumnsDirective>
</MultiColumnComboBoxComponent>
</div>
);
}
const root = ReactDOM.createRoot(document.getElementById("element"));
root.render(<App />);
```
### Step #5: Run the application
Finally, run the application in the browser using the following command.
```
npm start
```
Refer to the following image.
<figure>
<img src="https://www.syncfusion.com/blogs/wp-content/uploads/2024/07/Integrating-MultiColumn-ComboBox-in-React-application.png" alt="Integrating MultiColumn ComboBox in React application" style="width:100%">
<figcaption>Integrating MultiColumn ComboBox in React application</figcaption>
</figure>
## Conclusion
Thanks for reading! We hope you enjoyed learning about the new Syncfusion [React MultiColumn ComboBox](https://www.syncfusion.com/react-components/react-multicolumn-combobox "React MultiColumn ComboBox component") and its features. This component is now available in our [2024 Volume 2 release](https://www.syncfusion.com/forums/188642/essential-studio-2024-volume-2-main-release-v26-1-35-is-available-for-download "Essential Studio 2024 Volume 2"). Check out our [Release Notes](https://help.syncfusion.com/common/essential-studio/release-notes/v26.1.35 "Essential Studio Release Notes") and [What’s New](https://www.syncfusion.com/products/whatsnew "Essential Studio What's New pages") pages to discover all the new updates in this release. Try them out and share your thoughts in the comments section below!
The newest version of Essential Studio is available on the [license and downloads page](https://www.syncfusion.com/account/downloads "Essential Studio License and Downloads page") for existing Syncfusion customers. If you are not a customer, try our 30-day [free trial](https://www.syncfusion.com/downloads "Get free evaluation of the Essential Studio products") to test these new features.
You can also contact us through our [support forums](https://www.syncfusion.com/forums "Syncfusion Support Forum"), [support portal](https://support.syncfusion.com/ "Syncfusion Support Portal"), or [feedback portal](https://www.syncfusion.com/feedback "Syncfusion Feedback Portal"). We are always happy to assist you!
## Related blogs
- [What’s New in React Gantt Chart: 2024 Volume 2](https://www.syncfusion.com/blogs/post/whats-new-react-gantt-chart-2024-vol2 "Blog: What’s New in React Gantt Chart: 2024 Volume 2")
- [Enhancing Your Application with GraphQL-Based CRUD Operations in React Grid](https://www.syncfusion.com/blogs/post/graphql-crud-in-react-grid "Blog: Enhancing Your Application with GraphQL-Based CRUD Operations in React Grid")
- [Performance Optimization in React Pivot Table with Data Compression](https://www.syncfusion.com/blogs/post/performance-optimization-in-react-pivot-table "Blog: Performance Optimization in React Pivot Table with Data Compression")
- [Visualize Customer Survey Reports Using React 3D Circular Charts [Webinar Show Notes]](https://www.syncfusion.com/blogs/post/customer-survey-react-3d-circular-charts "Blog: Visualize Customer Survey Reports Using React 3D Circular Charts [Webinar Show Notes]") | jollenmoyani |
1,917,532 | Easily Render Flat JSON Data in JavaScript File Manager | TL;DR: Explore the power of flat JSON data rendering in #JavaScript File Manager. This feature allows... | 0 | 2024-07-11T16:57:50 | https://www.syncfusion.com/blogs/post/render-flat-json-data-js-file-manager | javascript, development, filemanager, web | ---
title: Easily Render Flat JSON Data in JavaScript File Manager
published: true
date: 2024-07-09 13:03:46 UTC
tags: javascript, development, filemanager, web
canonical_url: https://www.syncfusion.com/blogs/post/render-flat-json-data-js-file-manager
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/gmw8tgbosx3n4y75zs3r.png
---
**TL;DR:** Explore the power of flat JSON data rendering in #JavaScript File Manager. This feature allows you to manage your file system and perform common file operations without the need for HTTP client requests and backend URL configuration. Learn how to leverage this feature with your required services and enhance your file management experience.
The Syncfusion [JavaScript File Manager](https://www.syncfusion.com/javascript-ui-controls/js-file-manager "JavaScript File Manager") component is a graphical user interface that manages the file system. This component provides easy navigation for browsing and selecting files and folders from the file system. You can perform the most common file and folder operations, such as read, write, delete, create, rename, upload, edit, select, and sort.
From the [2024 Volume 2](https://www.syncfusion.com/forums/188642/essential-studio-2024-volume-2-main-release-v26-1-35-is-available-for-download "Essential Studio 2024 Volume 2") onward, the File Manager supports rendering an array of flat JSON data.
Let’s explore this new feature in detail!
## What is flat data?
Flat JSON data is a collection of files and folders stored with a defined structure. These objects can also be defined locally or retrieved from any file service provider through File Manager events.
## Why flat data?
The Syncfusion JavaScript File Manager can be populated with flat JSON data, eliminating the need for HTTP client requests and backend URL configuration. This allows you to utilize your required services, such as physical, Amazon, Azure, etc., through the File Manager’s action events. This supports all file operations like delete, cut, copy, paste, new folder creation, upload, download, and more.
Cloud service providers such as Google Drive have facilitated the option to fetch the data using client-side JavaScript; refer to the [documentation](https://developers.google.com/drive/api/quickstart/js "Getting started with JavaScript on Google Drive") for more details. So, the JavaScript File Manager now enables rendering the component with complete JavaScript code without maintaining a separate service provider.
## Render flat JSON data in JavaScript File Manager
Let’s see how to render flat JSON data in the JavaScript File Manager component by following these steps!
### Step 1: Setting up the TypeScript app
First, create a TypeScript app. This can be done by referring to the instructions in the [getting started with JavaScript File Manager](https://ej2.syncfusion.com/documentation/file-manager/getting-started "Getting started with JavaScript File Manager component") documentation.
### Step 2: Initialize the JavaScript File Manager
Now, initialize the JavaScript File Manager in the app using the following code.
```js
<div class="sample-container">
<!-- Initialize FileManager -->
<div id="filemanager"></div>
</div>
```
### Step 3: Rendering JSON data in JavaScript File Manager
Then, map the necessary JSON data to the [fileSystemData](https://ej2.syncfusion.com/documentation/api/file-manager/#filesystemdata "fileSystemData property in JavaScript File Manager") property of the File Manager using the [FileData](https://ej2.syncfusion.com/documentation/api/file-manager/fileData/ "FileData API in JavaScript File Manager") type.
Refer to the following code example.
```js
import{FileManager, Toolbar, NavigationPane, DetailsView, ContextMenu, FileData} from '@syncfusion/ej2-filemanager';
FileManager.Inject(Toolbar, NavigationPane, DetailsView, ContextMenu);
let resultData : FileData[] = [
{
dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"),
dateModified : new Date("2024-01-08T18:16:38.4384894+05:30"),
filterPath : "",
hasChild : true,
id : '0',
isFile : false,
name : "Files",
parentId : null,
size : 1779448,
type : "folder",
},
{
dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"),
dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"),
filterPath : "\\",
hasChild : false,
id : '1',
isFile : false,
name : "Documents",
parentId : '0',
size : 680786,
type : "folder",
},
{
dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"), dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"), filterPath : "\\", hasChild : false, id : "2", isFile : false, name : "Downloads", parentId : "0", size : 6172, type : "folder"}, {dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"), dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"), filterPath : "\\", hasChild : false, id : "3", isFile : false, name : "Music", parentId : "0", size : 20, type : "folder"}, {dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"), dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"), filterPath : "\\", hasChild : true, id : "4", isFile : false, name : "Pictures", parentId : "0", size : 228465, type : "folder"}, {dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"), dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"), filterPath : "\\", hasChild : false, id : "5", isFile : false, name : "Videos", parentId : "0", size : 20, type : "folder"}, {dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"), dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"), filterPath : "\\Documents\\", hasChild : false, id : "6", isFile : true, name : "EJ2_File_Manager", parentId : "1", size : 12403, type : ".docx"}, {dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"), dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"), filterPath : "\\Documents\\", hasChild : false, id : "9", isFile : true, name : "File_Manager", parentId : "1", size : 274, type : ".txt"}, {dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"), dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"), filterPath : "\\Music\\", hasChild : false, id : "11", isFile : true, name : "Music", parentId : "3", size : 10, type : ".mp3"}, {dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"), dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"), filterPath : "\\Videos\\", hasChild : false, id : "14", isFile : true, name : "Sample_Video", parentId : "5", size : 10, type : ".mp4"}, {
dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"),
dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"),
filterPath : "\\Pictures\\",
hasChild : false,
id : '15',
isFile : false,
name : "Employees",
parentId : '4',
size : 237568,
type : "folder",
},
{dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"), dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"), filterPath : "\\Pictures\\Employees\\", hasChild : false, id : '16', isFile : true, name : "Albert", parentId : '15', size : 53248, type : ".png", imageUrl : "https://ej2.syncfusion.com/demos/src/avatar/images/pic01.png"}, {dateCreated : new Date("2023-11-15T19:02:02.3419426+05:30"), dateModified : new Date("2024-01-08T16:55:20.9464164+05:30"), filterPath : "\\Pictures\\Employees\\", hasChild : false, id : '17', isFile : true, name : "Nancy", parentId : '15', size : 65536, type : ".png", imageUrl : "https://ej2.syncfusion.com/demos/src/avatar/images/pic02.png"}
];
let fileObject : FileManager = new FileManager({
fileSystemData : [].slice.call(resultData) as{[key:string] : Object}[],
});
fileObject.appendTo('#filemanager');
```
### Step 4: Configuring permissions
Lastly, use the [Permission](https://ej2.syncfusion.com/documentation/api/file-manager/permission/ "Permission API in JavaScript File Manager") property to enable or restrict permission for a specific file or folder. Refer to the following code example.
```js
import {FileManager, Toolbar, NavigationPane, DetailsView, ContextMenu, Permission, FileData} from '@syncfusion/ej2-filemanager';
FileManager.Inject(Toolbar, NavigationPane, DetailsView, ContextMenu);
let permission: Permission = {
"copy": false,
"download": false,
"write": false,
"writeContents": false,
"read": true,
"upload": false,
"message": ""
};
let resultData: FileData[] = [{
dateCreated: new Date("2023-11-15T19:02:02.3419426+05:30"),
dateModified: new Date("2024-01-08T16:55:20.9464164+05:30"),
filterPath: "\\",
hasChild: false,
id: '1',
isFile: false,
name: "Documents",
parentId: '0',
size: 680786,
type: "folder",
permission: permission
}]
```
Upon completing these steps, the File Manager will be rendered with JSON data and ready to perform file operations.
<figure>
<img src="https://www.syncfusion.com/blogs/wp-content/uploads/2024/07/Flat-JSON-Data-in-JavaScript-File-Manager-Output.gif" alt="Rendering flat JSON data in JavaScript File Manager" style="width:100%">
<figcaption>Rendering flat JSON data in JavaScript File Manager</figcaption>
</figure>
**Note:** For more details, refer to rendering [flat JSON data in the JavaScript File Manager demo](https://ej2.syncfusion.com/demos/#/material3/file-manager/flat-data.html "Rendering flat JSON data in the JavaScript File Manager demo") and [documentation](https://ej2.syncfusion.com/documentation/file-manager/flat-data "Rendering flat JSON data in the JavaScript File Manager documentation").
## Handling file operations with Google Drive
By default, the JavaScript File Manager component handles file operations like creating a new folder, deleting, cutting, copying, pasting, and renaming. Certain file operations like upload, download, and get image must be dealt with the services through corresponding file action events.
### Upload
To enable the upload operation in the JavaScript File Manager component with flat data, you must handle your service through the [uploadListCreate](https://ej2.syncfusion.com/documentation/api/file-manager/#uploadlistcreate "uploadListCreate event of JavaScript File Manager") event. This event provides access to the details of the file selected in the browser, including metadata such as the file name, size, and content type.
In the following code example, the File Manager retrieves the Google Drive file details as flat data for the initial rendering and uploads a file to Google Drive with the help of the **uploadListCreate** event.
```js
uploadListCreate: async
function uploadFile(args) {
var fileObj = document.getElementById("file").ej2_instances[0];
var pathArray = fileObj.pathNames;
var folderName = pathArray[pathArray.length - 1];
var parentFolderId = fileObj.fileSystemData.filter(function(obj) {
return obj.name == folderName;
})[0].originalID;
var folders = args.fileInfo.name.split('/');
var fileName = folders.length & gt;
1 ? folders[folders.length - 1] : args.fileInfo.name;
const file = args.fileInfo.rawFile;
// Create a new Drive API request to upload a file.
var body = {
'name': fileName,
'mimeType': args.fileInfo.type,
'parents': [parentFolderId]
};
var request = gapi.client.drive.files.create({
'resource': body
});
request.execute(function(resp) {
if (resp.error) {
// Handle the error.
console.error('Error:', resp.error.message);
args.element.getElementsByClassName("e-file-status")[0].innerText = "Upload Failed";
args.element.getElementsByClassName("e-file-status")[0].classList.add("e-upload-fails");
} else {
// Success: load the uploaded data within the File Manager component.
args.element.getElementsByClassName("e-file-status")[0].innerText = "Upload successful";
args.element.getElementsByClassName("e-file-status")[0].classList.add("e-upload-success");
fetchData();
}
});
},
```
### Download
To enable the download operation in the File Manager component with flat data, you must handle your service through the [beforeDownload](https://ej2.syncfusion.com/documentation/api/file-manager/#beforedownload "beforeDownload event of JavaScript File Manager") event. This event provides access to the details of the file selected in the File Manager.
In the following code example, the File Manager retrieves the Google Drive file details as flat data for the initial rendering. Setting the **cancel** property to **true** in the **beforeDownload** event prevents the File Manager component’s default delete action. Then, you can make a Google API request with an event argument to download the raw file from Google Drive.
```js
beforeDownload: function beforeDownload(args) {
// Cancel the default download action.
args.cancel = true;
var fileData = args.data.data;
const zip = new JSZip();
//To download multiple files as a zip folder.
if (fileData.length & gt; 1 || !fileData[0].isFile) {
downloadFiles(fileData);
}
//To download a single file.
else {
// Fetch the file content using the Google Drive API.
fetch(`https: //www.googleapis.com/drive/v3/files/${fileData[0].id}?alt=media`, {
method: 'GET', headers: {
'Authorization': 'Bearer ' + gapi.auth.getToken().access_token,
},
})
.then(function(response) {
if (!response.ok) {
throw new Error('Network response was not ok: ' + response.statusText);
}
return response.blob();
})
.then(function(blob) {
// Display image preview.
var img = document.createElement('img');
img.src = URL.createObjectURL(blob);
img.alt = fileData[0].name; // Set alternative text.
document.body.appendChild(img);
// Create a download link.
var downloadLink = document.createElement('a');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = fileData[0].name; // Set the desired file name.
document.body.appendChild(downloadLink);
downloadLink.click();
// Remove the link and image from the document.
document.body.removeChild(downloadLink);
document.body.removeChild(img);
}).
catch(function(error) {
console.error('Error downloading file:', error);
});
}
},
function downloadFiles(files) {
const zip = new JSZip();
const totalCount = files.some(file = > file.type === "") ? getTotalFileCount(files) : files.length;
const name = files.some(file = > file.type == "") ? 'folders': 'files';
// Iterate through files and add them to the zip.
files.forEach(file = > {
if (file.type === '') {
// If it's a folder, recursively fetch its contents.
fetchFolderContents(file.id).then(response = > {
downloadFiles(response.result.files);
});
} else {
// If it's a file, download and add it to the zip.
fetch(`https: //www.googleapis.com/drive/v3/files/${file.id}?alt=media`, {
method: 'GET', headers: {
'Authorization': 'Bearer ' + gapi.auth.getToken().access_token,
},
})
.then(response = > {
if (!response.ok) {
throw new Error('Network response was not ok: ' + response.statusText);
}
return response.blob();
})
.then(blob = > {
// Add file content to the zip.
zip.file(file.name, blob);
// Check if all files are added, then create the zip.
if (Object.keys(zip.files).length === totalCount) {
zip.generateAsync({ type: 'blob' }).then(zipBlob = > {
// Trigger download
const a = document.createElement('a');
a.href = URL.createObjectURL(zipBlob);
a.download = name + '.zip';
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
});
}
}).
catch(error = > {
console.error('Error downloading file:', error);
});
}
});
}
```
### Get image
To enable the image preview in the File Manager component with flat data, you can use the File Manager [fileSystemData](https://ej2.syncfusion.com/documentation/api/file-manager/#filesystemdata "fileSystemData property of JavaScript File Manager") property response with the **imageUrl** field.
In the following code example, the File Manager retrieves the Google Drive file details as a flat data JSON object and updates the **imageUrl** field with the Google Drive files [thumbnailLink](https://developers.google.com/drive/api/reference/rest/v3/files#resource "Google Drive: REST Resource: files") during initial rendering.
```js
async function fetchData() {
// Load the Drive API client library.
await gapi.client.load('drive', 'v3');
let nextPageToken = null;
let allFiles = [];
do {
const response = await gapi.client.drive.files.list({
pageSize: 1000,
fields: 'nextPageToken, files(id, name, mimeType, size, parents, thumbnailLink, trashed)',
pageToken: nextPageToken,
q: 'trashed=false'
});
allFiles = allFiles.concat(response.result.files);
nextPageToken = response.result.nextPageToken;
} while ( nextPageToken );
const files = allFiles;
// Create a flat array representing parent-child relationships.
window.fileSystemData = await createFlatData(files);
}
async function createFlatData(files) {
...
await Promise.all(files.map(async file = > {
...
var imageUrl = file.thumbnailLink;
//Frame File Manager response data by retrieving the folder details from the Google service.
if (file.name == 'Files') {
rootId = file.id;
fileDetails = {
id: '0',
name: file.name,
parentId: null,
isFile: file.mimeType == 'application/vnd.google-apps.folder' ? false: true,
hasChild: hasSubitems,
size: file.size == undefined ? '0': file.size,
filterPath: '',
originalID: file.id
};
} else {
fileDetails = {
id: file.id,
name: file.name,
isFile: file.mimeType == 'application/vnd.google-apps.folder' ? false: true,
hasChild: hasSubitems,
size: file.size == undefined ? '0': file.size,
filterPath: file.filterPath,
imageUrl: imageUrl,
originalID: file.id
};
}
```
**Note:** For more details, refer to [Events in JavaScript File Manager](https://ej2.syncfusion.com/documentation/api/file-manager/#events "Events in JavaScript File Manager").
## GitHub reference
Also, check out the complete example for [rendering flat JSON data in JavaScript File Manager by fetching data from the Google Drive GitHub demo](https://github.com/SyncfusionExamples/javascript-filemanager-flat-data-with-cloud-service "Rendering flat JSON data in JavaScript File Manager with cloud service GitHub demo").
## Conclusion
Thanks for reading! In this blog, we’ve seen how to render flat JSON data in the Syncfusion [JavaScript File Manager](https://www.syncfusion.com/javascript-ui-controls/js-file-manager "JavaScript File Manager"). This feature is a part of the [2024 Volume 2 release](https://www.syncfusion.com/forums/188642/essential-studio-2024-volume-2-main-release-v26-1-35-is-available-for-download "Essential Studio 2024 Volume 2") and is also introduced in our [Angular](https://ej2.syncfusion.com/angular/demos/#/material3/file-manager/flat-data "Flat data rendering in Angular File Manager"), [React](https://ej2.syncfusion.com/react/demos/#/material3/file-manager/flat-data.html "Flat JSON data rendering in React File Manager"), [Vue](https://ej2.syncfusion.com/vue/demos/#/material3/file-manager/flat-data.html "Flat data rendering in Vue File Manager"), [ASP.NET Core](https://ej2.syncfusion.com/aspnetcore/filemanager/flatdata#/material3 "Flat data rendering in ASP.NET Core File Manager"), and [ASP.NET MVC File Manager](https://ej2.syncfusion.com/aspnetmvc/filemanager/flatdata#/material3 "Flat data rendering in ASP.NET MVC File Manager") components.
We invite you to peruse our [Release Notes](https://help.syncfusion.com/common/essential-studio/release-notes/v26.1.35 "Essential Studio Release Notes") and [What’s New](https://www.syncfusion.com/products/whatsnew/essential-js2 "Essential Studio What’s New page") pages to delve deeper into the plethora of other features introduced in this release.
For our existing customers, the latest version of Essential Studio is readily accessible on the [License and Downloads](https://www.syncfusion.com/account/downloads "Essential Studio License and Downloads page") page. If you’re new to Syncfusion, we offer a 30-day [free trial](https://www.syncfusion.com/downloads "Get free evaluation of the Essential Studio products") to experience our components’ entire range.
Should you have any questions, please contact us via our [support forums](https://www.syncfusion.com/forums "Syncfusion Support Forum"), [support portal](https://support.syncfusion.com/ "Syncfusion Support Portal"), or [feedback portal](https://www.syncfusion.com/feedback/ "Syncfusion Feedback Portal"). We’re always here to help you! Happy exploring!
## Related blogs
- [Effortlessly Synchronize JavaScript Controls Using DataManager](https://www.syncfusion.com/blogs/post/sync-javascript-controls-datamanager "Blog: Effortlessly Synchronize JavaScript Controls Using DataManager")
- [Optimizing Productivity: Integrate Salesforce with JavaScript Scheduler](https://www.syncfusion.com/blogs/post/add-salesforce-javascript-scheduler "Blog: Optimizing Productivity: Integrate Salesforce with JavaScript Scheduler")
- [PNPM vs. NPM vs. Yarn: What Should I Choose in 2024?](https://www.syncfusion.com/blogs/post/pnpm-vs-npm-vs-yarn "Blog: PNPM vs. NPM vs. Yarn: What Should I Choose in 2024?")
- [Empower Your Data Insights: Integrating JavaScript Gantt Chart into Power BI](https://www.syncfusion.com/blogs/post/add-gantt-chart-into-power-bi "Blog: Empower Your Data Insights: Integrating JavaScript Gantt Chart into Power BI") | jollenmoyani |
1,917,535 | What’s New in Angular Query Builder: 2024 Volume 2 | TL;DR: In the 2024 Volume 2 release, the Syncfusion Angular Query Builder includes drag-and-drop... | 0 | 2024-07-11T16:56:21 | https://www.syncfusion.com/blogs/post/angular-query-builder-2024-volume-2 | angular, whatsnew, ui, web | ---
title: What’s New in Angular Query Builder: 2024 Volume 2
published: true
date: 2024-07-09 13:14:45 UTC
tags: angular, whatsnew, ui, web
canonical_url: https://www.syncfusion.com/blogs/post/angular-query-builder-2024-volume-2
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/5h2ok2p0n3x90gqayf4n.png
---
**TL;DR:** In the 2024 Volume 2 release, the Syncfusion Angular Query Builder includes drag-and-drop functionality for easier query creation and independent connectors for more complex queries.
Syncfusion [Angular Query Builder](https://www.syncfusion.com/angular-components/angular-query-builder "Angular Query Builder") is a graphical user interface component to build queries. Its rich feature set includes data binding, templates, and importing and exporting queries from and to JSON, MongoDB Query, and SQL formats. It can generate predicates that are used as conditions in Data Manager. It can also auto-populate a data source and map it to appropriate fields from an array of JavaScript objects.
In this blog, we’ll explore the new features introduced in the Angular Query Builder for the [2024 volume 2](https://www.syncfusion.com/forums/188642/essential-studio-2024-volume-2-main-release-v26-1-35-is-available-for-download "Essential Studio 2024 Volume 2") release.
## Drag and drop support
This feature lets users create, modify, and manage rules or queries visually and intuitively by dragging and dropping conditions and groups within a graphical user interface (GUI).
This method simplifies the process for users, especially those who may not be proficient in writing complex queries manually, making data interaction more accessible. The [allowDragAndDrop](https://ej2.syncfusion.com/angular/documentation/api/query-builder#allowdraganddrop "allowDragAndDrop property of Angular Query Builder") property controls the drag and drop behavior, rendering a draggable icon in front of the condition or group element. By dragging that element, users can efficiently build and adjust their queries.
Refer to the following image.
<figure>
<img src="https://www.syncfusion.com/blogs/wp-content/uploads/2024/07/Drag-and-drop-feature-in-Angular-Query-Builder.gif" alt="Drag and drop feature in Angular Query Builder" style="width:100%">
<figcaption>Drag and drop feature in Angular Query Builder</figcaption>
</figure>
**Note:** For more details, refer to the [drag-and-drop feature in the Angular Query Builder demo](https://ej2.syncfusion.com/angular/demos/#/fluent2/query-builder/drag-drop "Drag-and-drop feature in the Angular Query Builder demo").
## Independent connectors
The Angular Query Builder is a powerful tool for creating complex database queries. However, by default, it only allows users to connect queries with a single connector within the same group. This limitation frustrates users who need to connect queries with different connectors, such as combining conditions with both AND and OR (e.g., ( **X = ‘A’ AND Y = ‘B’ OR Z = ‘C’** )).
We have introduced the support for connecting queries with different connectors to overcome this limitation. This involves specifying the condition property of the rule model object.
- For objects without the **rules** property (referred to as rules), this property connects the conditions with different connectors.
- For objects with the **rules** property (referred to as groups), the condition property connects the groups with different connectors.
- Notably, the root-level group is not considered since conditions and groups are connected within that root-level group.
The [enableSeparateConnector](https://ej2.syncfusion.com/angular/documentation/api/query-builder#enableseparateconnector "enableSeparateConnector property of Angular Query Builder") property controls this independent connector behavior. When enabled, it renders connectors between rules and groups, allowing users to connect them with different connectors. This enhancement significantly expands the flexibility and functionality of the Query Builder, enabling users to construct more intricate and precise queries.
By supporting multiple connectors, users can seamlessly integrate complex logical conditions, enhancing their ability to query and analyze data effectively.
The rule model can be updated to include the condition for each rule by adding a condition property to each rule object. This property will specify the connector.
Refer to the following code example.
```js
let importRules: RuleModel = {
condition: "",
rules: [
{ label: "First Name", field: "FirstName", type: "string", operator: "startswith", value: "Andre", condition: "or" },
{ label: "Last Name", field: "LastName", type: "string", operator: "in", value: ['Davolio', 'Buchanan'], condition: "and" },
{ label: "Age", field: "Age", type: "number", operator: "greaterthan", value: 29, condition: "or" },
{
condition: "", rules: [
{ label: "Is Developer", field: "IsDeveloper", type: "boolean", operator: "equal", value: true, condition: "and" },
{ label: "Primary Framework", field: "PrimaryFramework", type: "string", operator: "equal", value: "React" }
]
},
{ label: "Hire Date", field: "HireDate", type: "date", operator: "greaterthan", value: "06/19/2024" }
]
};
```
Refer to the following image.
<figure>
<img src="https://www.syncfusion.com/blogs/wp-content/uploads/2024/07/Independent-connectors-in-Angular-Query-Builder.png" alt="Independent connectors in Angular Query Builder" style="width:100%">
<figcaption>Independent connectors in Angular Query Builder</figcaption>
</figure>
The output query will be like the following one.
```js
FirstName LIKE ('Andre%') OR Age > 29 AND (IsDeveloper = true AND PrimaryFramework = 'React') OR HireDate > '06/19/2024'
```
**Note:** For more details, refer to the [independent connectors in the Angular Query Builder demo](https://ej2.syncfusion.com/angular/demos/#/fluent2/query-builder/separate-connector "Independent connectors in the Angular Query Builder demo").
## Conclusion
Thanks for reading! We hope you enjoyed this quick introduction to the new features of our [Angular Query Builder](https://www.syncfusion.com/angular-components/angular-query-builder "Angular Query Builder") component. If you would like to give it a try, please download the latest available version of Essential Studio, [2024 Volume 2](https://www.syncfusion.com/forums/188642/essential-studio-2024-volume-2-main-release-v26-1-35-is-available-for-download "Essential Studio 2024 Volume 2"). With this component, you can experience wonderful query building and handling.
You can also contact us through our [support forums](https://www.syncfusion.com/forums "Syncfusion Support Forum"), [support portal](https://support.syncfusion.com/ "Syncfusion Support Portal"), or [feedback portal](https://www.syncfusion.com/feedback/ "Syncfusion Feedback Portal"). We are always happy to assist you!
## Related blogs
- [Introducing the New Angular TextArea Component](https://www.syncfusion.com/blogs/post/new-angular-textarea-component "Blog: Introducing the New Angular TextArea Component")
- [Optimize Blog Management with Angular Gantt Chart](https://www.syncfusion.com/blogs/post/blog-management-angular-gantt-chart "Blog: Optimize Blog Management with Angular Gantt Chart")
- [Explore Advanced PDF Exporting in Angular Pivot Table](https://www.syncfusion.com/blogs/post/pdf-exporting-angular-pivot-table "Blog: Explore Advanced PDF Exporting in Angular Pivot Table")
- [What’s New in Angular 18?](https://www.syncfusion.com/blogs/post/whats-new-in-angular-18 "Blog: What’s New in Angular 18?") | jollenmoyani |
1,917,537 | Deploying native Quarkus REST API's in AWS Lambda | In recent days or weeks, as someone relatively new to AWS services, I faced challenges running a... | 0 | 2024-07-09T19:55:04 | https://dev.to/patryk_szczypie_f1c7101c/deploying-quarkus-rest-apis-in-aws-lambda-1j62 | webdev, quarkus, aws, java | In recent days or weeks, as someone relatively new to [AWS services](https://aws.amazon.com/products/?aws-products-all.sort-by=item.additionalFields.productNameLowercase&aws-products-all.sort-order=asc&awsf.re%3AInvent=*all&awsf.Free%20Tier%20Type=*all&awsf.tech-category=*all), I faced challenges running a [Quarkus](https://quarkus.io/) application I've been working on, on AWS Lambda.
From the start I wanted to run it as a native image, but developing the project on a laptop with an Apple Silicon chip caused some issues that I needed to overcome first.
Once this was sorted that out, the next problem was in resolving some internal server errors that occurred when invoking the Lambda containing my app.
Overall, it was a frustrating experience at times, but it was rewarding in the end. The app now runs super-fast inside a Lambda (about 0.5 seconds or less to invoke), and I've gained valuable knowledge about some AWS services.
I'm writing this article for two reasons:
- As a solution reminder in case I forget how to solve these problems but need to do it again someday.
- As a hopefully useful resource for someone (you?) who is currently struggling with the same problems I faced recently.
Let's dive in!
## 1. Create a Quarkus app
I won't go into much detail about how to create a Quarkus app since there are plenty of resources that explain it.
For a starter project, let's create an app called quarkus-lambda with the following extensions:
- `quarkus-rest`
- `quarkus-amazon-lambda-rest`
For simplicity, let's create just one REST endpoint in the app:
```java
@Path("/hello")
public class RestApi {
@GET
@Produces(MediaType.TEXT_PLAIN)
public String hello() {
return "Hello from Quarkus REST";
}
}
```
When running it via `quarkus dev` we should confirm it uses Lambda:
```log
2024-07-09 17:19:24,938 INFO [io.qua.ama.lam.run.MockEventServer] (build-51) Mock Lambda Event Server Started
__ ____ __ _____ ___ __ ____ ______
--/ __ \/ / / / _ | / _ \/ //_/ / / / __/
-/ /_/ / /_/ / __ |/ , _/ ,< / /_/ /\ \
--\___\_\____/_/ |_/_/|_/_/|_|\____/___/
2024-07-09 17:19:25,583 INFO [io.qua.ama.lam.run.AbstractLambdaPollLoop] (Lambda Thread (DEVELOPMENT)) Listening on: http://localhost:8080/_lambda_/2018-06-01/runtime/invocation/next
2024-07-09 17:19:25,604 INFO [io.quarkus] (Quarkus Main Thread) quarkus-lambda 1.0.0-SNAPSHOT on JVM (powered by Quarkus 3.12.1) started in 1.345s.
2024-07-09 17:19:25,605 INFO [io.quarkus] (Quarkus Main Thread) Profile dev activated. Live Coding activated.
2024-07-09 17:19:25,606 INFO [io.quarkus] (Quarkus Main Thread) Installed features: [amazon-lambda, cdi, rest, security, smallrye-context-propagation, vertx]
```
We can also confirm it works by doing an HTTP GET request on the running server:
```bash
> curl localhost:8080/hello
Hello from Quarkus REST%
```
## 2. Build a native image of the app
This is where my first problems started to arise. When following guides like [AWS LAMBDA WITH QUARKUS REST, UNDERTOW, OR REACTIVE ROUTES](https://quarkus.io/guides/aws-lambda-http#deploying-a-native-executable), I encountered issues because I was developing on an ARM64 processor.
The part about [Deploying a native executable](https://quarkus.io/guides/aws-lambda-http#deploying-a-native-executable) didn't work with the `sam local start-api` or `sam deploy` commands.
Here's a [GitHub issue](https://github.com/quarkusio/quarkus/issues/38715) describing my problem.
Instead of deploying the necessary AWS services via sam, I decided to create a Docker image instead, push it to AWS Elastic Container Registry (ECR), and create the Lambda from it:
### 1. Build native image inside a docker container
```bash
> quarkus build --native --no-tests -Dquarkus.native.container-build=true
```
### 2. Login into AWS ECR
```bash
> aws ecr get-login-password --region <AWS_REGION> | docker login --username AWS --password-stdin <AWS_ID>.dkr.ecr.<AWS_REGION>.amazonaws.com
```
### 3. Create repository on ECR
```bash
> aws ecr create-repository --repository-name quarkus-lambda
# you'll get a repository tag as a response which is used in the next steps
```
### 4. Build a container which runs the app in native mode.
```bash
> docker build -f src/main/docker/Dockerfile.native -t <AWS_ID>.dkr.ecr.<AWS_REGION>.amazonaws.com/quarkus-lambda .
```
### 5. Push the built container to ECR
```bash
> docker push <AWS_ID>.dkr.ecr.<AWS_REGION>.amazonaws.com/quarkus-lambda
```
## 3. Create the Lambda function on AWS
Now we need to create a Lambda function to run our application when invoked.
The best way to do it would probably be via an IaaS script using [CloudFormation](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html) or [Terraform](https://www.terraform.io).
Here we'll do it manually by clicking around in the AWS console:
1. Login into AWS, go to Lambda and click on **Create function**
- Choose **Container image** to create the function from
- Enter a function name
- Browse images to find the image container we created and pushed to ECR
- (important for Mac / Apple Silicon) choose `arm64` as the Architecture
- Click on **Create function**
You should see a result like this:
2. Create a trigger for the Lambda function
We need to invoke the lambda somehow and want to use our `/hello` endpoint for this.
To do it we must create an API Gateway trigger and configure it:
- Click on **Create Trigger** and select _API Gateway_ as the source.
We'll create a new REST API, and let's keep it open for simplicity.
Our trigger is now created:
Let's open it:
The resources basically define paths of our application like `v1/api/orders/list`, `/v1/api/recipes/edit/1`, etc.
On this page we need to differentiate between "static" paths that don't change much, like `/v1/api` and "dynamic" ones like `/orders/list` and `/recipes/edit/1`.
For better differentiation in this case you would probably do `/v1/api/orders` and `/v1/recipes` as the static parts and `/list` and `/edit/1` as dynamic.
But what matters here, is that we need to declare the dynamic parts as **_proxy resources_**.
In our app we only have one endpoint `/hello` and no `/quarkus-lambda` endpoint - so let's delete it:
Next let's create a **_Proxy resource_** for our `/hello` path and call it `{my-api+}`:
We now have the new resource definition but no Integration setup, meaning it's not connected to anything in particular.
Let's make it invoke our Quarkus app inside the lambda function we've created!
- click on **ANY** below the `/{my-api+}` resource
- Click on Edit integration, select Lambda function, and choose our Lambda
**IMPORTANT!** make sure to select the _Lambda proxy integration_ checkbox - otherwise you'll probably get a NullPointerException when invoking your Quarkus app
## 4. Test your endpoint
With the integration to the Lambda function covered, we can now test our endpoint.
An easy way to do this, is to select **_ANY_** below our `/{my-api+}` proxy resource, and then select the **Test** tab:
We fill the `{my-api+}` value with our only endpoint in the application - `hello`, set the method type to `GET` and click the "Test" button.
When everything was setup properly, we should get the following response from our Lambda function:
Let's also check the Lambda's log output in CloudWatch:
As you can see, it takes about 0,5s to run our Quarkus app when invoking the lambda.
And that's it - I hope this is helpful to someone!
Feel free to comment or message me, if you have any questions.
I'll probably write another article soon about calling various AWS services like S3, DynamoDB, Cognito, etc., from a Quarkus app running inside a Lambda function. | patryk_szczypie_f1c7101c |
1,917,538 | GetBlock Ambassador Program Goes Live: How to Get Rewards | GetBlock, a premium provider of RPC nodes and Web3 infrastructure, invites all crypto natives,... | 0 | 2024-07-09T15:23:10 | https://dev.to/getblockapi/getblock-ambassador-program-goes-live-how-to-get-rewards-p7e | blockchain, cryptocurrency, ambassadorprogram, nodes |
GetBlock, a premium provider of RPC nodes and Web3 infrastructure, invites all crypto natives, explorers, enthusiasts, and pros to spread the word about its opportunities and seize rewards for every new client who signs up and buys a subscription.
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GetBlock Ambassadors now have the opportunity to promote the full range of products and services to expand the Web3 infrastructure and empower blockchain developers.
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Besides financial rewards, GetBlock supports its ambassadors with exclusive merch and fancy souvenirs. As such, joining GetBlock’s Ambassador Program is the easiest way to enhance your visibility on the Web3 scene.
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Click [here](https://getblock.io/ambassadors-program/?utm_source=external&utm_medium=article&utm_campaign=devto_ambassador) to join our Ambassador Program. | getblockapi |
1,917,539 | Mastering Data Structures: A Comprehensive Collection of Free Programming Tutorials 🧠 | The article is about a comprehensive collection of free online programming tutorials focused on mastering data structures and algorithms. It features six high-quality courses from renowned institutions like UC Berkeley, SUNY Buffalo, Simplilearn, IIT Kharagpur, and IIT Delhi, covering topics such as advanced data structures, algorithm design and analysis, programming fundamentals, and C++ data structures for beginners. The article provides a detailed overview of each tutorial, highlighting the key concepts and practical applications, and includes direct links to the resources, making it an invaluable resource for anyone looking to enhance their problem-solving skills and coding expertise. | 27,985 | 2024-07-09T15:23:11 | https://dev.to/getvm/mastering-data-structures-a-comprehensive-collection-of-free-programming-tutorials-2d9m | getvm, programming, freetutorial, collection |
Are you looking to level up your programming skills and dive deep into the world of data structures? 🤔 Look no further! We've curated a collection of free online tutorials that will take you on a journey through the fundamental and advanced concepts of data structures and algorithms.
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---
## Want to Learn More?
- 📖 Explore More [Free Resources on GetVM](https://getvm.io/explore)
- 💬 Join our [Discord](https://discord.gg/XxKAAFWVNu) or tweet us [@GetVM](https://x.com/getvmio) 😄 | getvm |
1,917,540 | Modelos Generativos y su Aplicación en Datos Sintéticos | Los modelos generativos han emergido como una de las áreas más fascinantes y poderosas del... | 0 | 2024-07-09T15:25:15 | https://dev.to/gcjordi/modelos-generativos-y-su-aplicacion-en-datos-sinteticos-4d9m | ia, ai, datascience, syntheticdata | Los modelos generativos han emergido como una de las áreas más fascinantes y poderosas del aprendizaje automático. Estos modelos son capaces de aprender la distribución de los datos y generar nuevos ejemplos que son indistinguibles de los datos reales. Las aplicaciones de estos modelos en los datos sintéticos son vastas, desde la creación de imágenes y texto hasta la generación de datos sintéticos para el entrenamiento de otros modelos de IA.
**Tipos de Modelos Generativos**
Redes Generativas Antagónicas (GANs): Las GANs son quizás los modelos generativos más conocidos y utilizados. Consisten en dos redes neuronales que compiten entre sí: una red generadora que crea datos falsos y una red discriminadora que intenta distinguir entre datos reales y falsos. A través de este proceso de competencia, la red generadora mejora hasta que sus producciones son muy realistas.
Autoencoders Variacionales (VAEs): Los VAEs son una extensión de los autoencoders tradicionales. Se entrenan para compimir los datos de entrada en una representación latente y luego reconstruir los datos de esta representación. Los VAEs imponen una estructura probabilística en el espacio latente, permitiendo la generación de datos nuevos al muestrear de esta distribución latente.
Modelos Autoregresivos: Estos modelos generan datos secuenciales, como texto o música, prediciendo el siguiente elemento en la secuencia basado en los elementos anteriores. Ejemplos de estos modelos incluyen PixelRNN y PixelCNN para imágenes, y GPT (Generative Pre-trained Transformer) para texto.
**Aplicaciones en Síntesis de Datos**
Creación de Imágenes y Video: Las GANs han sido utilizadas para generar imágenes y videos de alta calidad. Esto tiene aplicaciones en el entretenimiento, como la creación de efectos visuales y personajes virtuales, así como en la moda, donde se pueden generar nuevas prendas de vestir virtualmente, entre otros muchos campos.
Generación de Texto: Modelos como GPT pueden generar texto coherente, rico y contextualmente relevante. Esto es útil -por ejemplo- en aplicaciones como chatbots, generación automática de artículos y resúmenes, y asistencia en la escritura creativa.
Datos Sintéticos para Entrenamiento: La generación de datos sintéticos es crucial cuando los datos reales son escasos o difíciles de obtener. Los modelos generativos pueden crear datos adicionales para entrenar otros modelos de aprendizaje automático, mejorando su rendimiento. Por ejemplo, en la medicina, se pueden generar imágenes médicas sintéticas para entrenar modelos de diagnóstico.
Mejora de la Privacidad: En situaciones donde la privacidad de los datos es una preocupación, los datos sintéticos generados por modelos generativos pueden ser utilizados en lugar de los datos reales. Esto es especialmente útil en áreas como la salud y las finanzas, donde la protección de la información personal es crucial.
Interpolación y Superresolución: Los modelos generativos pueden ser utilizados para mejorar la calidad de los datos. Por ejemplo, en imágenes, pueden realizar superresolución, generando versiones de mayor resolución a partir de imágenes de baja resolución. También pueden interpolar entre diferentes muestras para generar transiciones suaves y realistas.
**Desafíos y Futuro**
A pesar de su potencial, los modelos generativos enfrentan varios desafíos. La capacitación de GANs, por ejemplo, puede ser inestable y difícil de equilibrar. Además, garantizar que los datos sintéticos sean realmente útiles y no introduzcan sesgos es un área activa de investigación.
El futuro de los modelos generativos es prometedor, con investigaciones en curso para mejorar su estabilidad, eficacia y aplicabilidad. Con avances continuos, se espera que estos modelos transformen numerosas industrias, ofreciendo soluciones innovadoras y eficientes para la creación y manipulación de datos.
En resumen, los modelos generativos juegan un papel crucial en la fabricación de datos sintéticos, con aplicaciones que van desde la creación de contenido hasta la mejora de la privacidad, pasando por muchos otros terrenos. A medida que la tecnología avanza, su impacto seguirá creciendo, abriendo nuevas posibilidades en el ámbito del aprendizaje automático y más allá.
[Jordi G. Castillón](https://jordigarcia.eu/) | gcjordi |
1,917,541 | Top 7 Featured DEV Posts of the Week | Welcome to this week's Top 7, where the DEV editorial team handpicks their favorite posts from the... | 0 | 2024-07-09T15:28:41 | https://dev.to/devteam/top-7-featured-dev-posts-of-the-week-2ko2 | top7 | _Welcome to this week's Top 7, where the DEV editorial team handpicks their favorite posts from the previous week._
Congrats to all the authors that made it onto the list 👏
{% embed https://dev.to/huijing/how-to-try-experimental-css-features-f0 %}
Hui Jing walks through the steps to enable experimental CSS features in different browsers, while giving us a glimpse of CSS and browser history.
---
{% embed https://dev.to/isaachagoel/you-dont-know-undoredo-4hol %}
Isaac dives deep into the complexities of implementing undo/redo functionality in applications.
---
{% embed https://dev.to/opensauced/the-silent-crisis-in-open-source-when-maintainers-walk-away-1m81 %}
Bekah highlights the growing issue of burnout among open source maintainers, discussing its impact on the community and potential solutions.
---
{% embed https://dev.to/alvaromontoro/css-one-liners-to-improve-almost-every-project-18m %}
Alvaro shares powerful CSS one-liners that can enhance the functionality and aesthetics of web projects with minimal code. Before and after pics included!
---
{% embed https://dev.to/babichweb/mythbusting-dom-was-dom-invented-alongside-html-3fme %}
Serhii debunks common myths about the Document Object Model (DOM), clarifying its history and evolution in web development.
---
{% embed https://dev.to/ymtdzzz/otel-tui-a-tui-tool-for-viewing-opentelemetry-traces-2e7n %}
Y.Matsuda introduces OTel-TUI, a text-based user interface tool designed for visualizing OpenTelemetry traces, making it easier to debug and monitor applications.
---
{% embed https://dev.to/cassidoo/the-productivity-apps-i-use-in-2024-41h5 %}
Cassidy lists her favorite productivity apps for 2024, explaining how each one keeps her organized and efficient.
---
_And that's a wrap for this week's Top 7 roundup! 🎬 We hope you enjoyed this eclectic mix of insights, stories, and tips from our talented authors. Keep coding, keep learning, and stay tuned to DEV for more captivating content and [make sure you’re opted in to our Weekly Newsletter] (https://dev.to/settings/notifications) 📩 for all the best articles, discussions, and updates._ | thepracticaldev |
1,917,542 | Chamada de Trabalhos do SBQS 2024 | "Olá, Pessoal! Com o adiamento do deadline do SBQS, ainda há tempo para escrever e enviar seus... | 0 | 2024-07-09T15:28:27 | https://dev.to/fronteirases/chamada-de-trabalhos-do-sbqs-2024-4dh9 | "Olá, Pessoal!
Com o adiamento do deadline do SBQS, ainda há tempo para escrever e enviar seus artigos. Já pararam para pensar se a pesquisa de vocês pode ser submetida ao SBQS? Imagino que alguns de vocês pensam que o SBQS é 100% voltado para modelos de qualidade de software, mas não é bem assim! 😊
O SBQS abrange pesquisas que contribuem tanto para a qualidade do processo de desenvolvimento quanto para a qualidade do produto de software.
🔹 Sua pesquisa contribui para a qualidade do produto de software? Assuntos como Segurança, UX, Usabilidade e Manutenibilidade são extremamente relevantes para o SBQS.
🔹 Sua pesquisa apoia uma melhor qualidade do processo de desenvolvimento? Melhorias em engenharia de requisitos, testes ou arquitetura de software também são de grande interesse para o SBQS.
Dê uma olhada na nossa chamada de trabalhos:
https://sbqs.sbc.org.br/2024/index.php/pt/chamada-de-trabalhos/trilha-de-trabalhos-tecnicos
Além da trilha de Trabalhos Técnicos (Research Track), temos a trilha de Relatos de Experiência (que você pode escrever sobre experiência em projetos com a indústria, e trilha de Educação em Qualidade de Software.
Lembrem-se: o SBQS é um simpósio sério e consolidado, agora em sua 23ª edição! Todos os artigos aceitos são indexados na DBLP – o que significa visibilidade para as nossas pesquisas.
Se ainda precisam de mais motivos para submeter seus artigos: este ano o evento será em Salvador! Teremos Keynotes incríveis, incluindo Alexander Serebrenik, Márcio Ribeiro e Sheila Reinehr. E os chairs defendem fortemente a inclusividade, mantendo sempre a qualidade ;-)
Estamos ansiosos para ver seus trabalhos. Queremos a comunidade crescendo. Somos muitos e queremos ver mais pessoas, conhecer mais pessoas de ES no SBQS. Preparem seus artigos e submetam! 🚀
Abs dos chairs do SBQS 2024,
Tayana, Maldonado, Edna, Johnny, Patricia e Breno" | fronteirases | |
1,917,543 | Top 10 Security Features in .NET Core | In the modern landscape of software development, security is a paramount concern, and .NET Core... | 0 | 2024-07-09T15:32:43 | https://www.nilebits.com/blog/2024/07/top-10-security-features-dotnet-core/ | dotnet, dotnetcore, csharp, aspdotnet | In the modern landscape of software development, security is a paramount concern, and [.NET Core](https://www.linkedin.com/pulse/cancellation-tokens-c-best-practices-net-core-amr-saafan-9cwif/) offers a robust set of features to ensure that applications are secure from various threats. This article delves into the top 10 security features in .NET Core, providing in-depth explanations, practical code examples, and references to further resources.
1. Authentication and Authorization
Authentication and authorization are foundational security concepts, and .NET Core provides built-in support for these through [ASP.NET Core](https://www.nilebits.com/blog/2023/10/asp-net-core-vs-asp-net-framework-which-is-better-for-your-project/) Identity and policy-based authorization.
Authentication Example:
```
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
services.AddIdentity<ApplicationUser, IdentityRole>()
.AddEntityFrameworkStores<ApplicationDbContext>()
.AddDefaultTokenProviders();
services.AddAuthentication()
.AddCookie(options =>
{
options.LoginPath = "/Account/Login/";
options.AccessDeniedPath = "/Account/AccessDenied/";
});
services.AddMvc();
}
```
Authorization Example:
```
public void ConfigureServices(IServiceCollection services)
{
services.AddAuthorization(options =>
{
options.AddPolicy("AdminOnly", policy => policy.RequireRole("Admin"));
});
}
```
2. HTTPS and SSL/TLS Enforcement
.NET Core makes it easy to enforce HTTPS and ensure secure communication between the client and server.
Enforce HTTPS:
```
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
app.UseHttpsRedirection();
app.UseHsts();
}
```
Configure HTTPS in Program.cs:
```
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.UseKestrel(options =>
{
options.ConfigureHttpsDefaults(co =>
{
co.SslProtocols = System.Security.Authentication.SslProtocols.Tls12;
});
});
```
3. Data Protection API
The Data Protection API (DPAPI) in .NET Core helps protect sensitive data, such as passwords and encryption keys.
Protect Data:
```
public void ConfigureServices(IServiceCollection services)
{
services.AddDataProtection()
.PersistKeysToFileSystem(new DirectoryInfo(@"c:\keys\"))
.SetApplicationName("MyApp");
}
public class MyService
{
private readonly IDataProtector _protector;
public MyService(IDataProtectionProvider provider)
{
_protector = provider.CreateProtector("MyService.Purpose");
}
public string Protect(string input)
{
return _protector.Protect(input);
}
public string Unprotect(string input)
{
return _protector.Unprotect(input);
}
}
```
4. Cross-Site Request Forgery (CSRF) Protection
CSRF attacks can be mitigated in .NET Core using the built-in anti-forgery features.
Enable Anti-Forgery:
```
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc(options =>
{
options.Filters.Add(new AutoValidateAntiforgeryTokenAttribute());
});
}
```
Use Anti-Forgery Token in Views:
```
<form method="post">
<input type="hidden" name="__RequestVerificationToken" value="@Html.AntiForgeryToken()" />
<!-- Form fields -->
</form>
```
5. Cross-Origin Resource Sharing (CORS)
CORS allows you to control how resources on your server are shared with client applications from different origins.
Enable CORS:
```
public void ConfigureServices(IServiceCollection services)
{
services.AddCors(options =>
{
options.AddPolicy("AllowSpecificOrigin",
builder => builder.WithOrigins("http://example.com")
.AllowAnyHeader()
.AllowAnyMethod());
});
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
app.UseCors("AllowSpecificOrigin");
}
```
6. Secure Configuration Management
.NET Core applications can leverage the configuration system to securely manage sensitive settings, such as connection strings and API keys.
Use Secret Manager for Development:
```
dotnet user-secrets init
dotnet user-secrets set "ConnectionStrings:DefaultConnection" "YourConnectionString"
```
Read Configuration:
```
public void ConfigureServices(IServiceCollection services)
{
var connectionString = Configuration["ConnectionStrings:DefaultConnection"];
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(connectionString));
}
```
7. Logging and Monitoring
Logging and monitoring are crucial for identifying and responding to security incidents. .NET Core provides extensive logging capabilities.
Configure Logging:
```
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
loggerFactory.AddConsole(Configuration.GetSection("Logging"));
loggerFactory.AddDebug();
app.UseMvc();
}
```
Add Logging to a Service:
```
public class MyService
{
private readonly ILogger<MyService> _logger;
public MyService(ILogger<MyService> logger)
{
_logger = logger;
}
public void DoWork()
{
_logger.LogInformation("Doing work...");
}
}
```
8. Role-Based Access Control (RBAC)
RBAC is a method of regulating access to resources based on the roles of individual users within an organization.
Define Roles:
```
public void ConfigureServices(IServiceCollection services)
{
services.AddIdentity<ApplicationUser, IdentityRole>()
.AddEntityFrameworkStores<ApplicationDbContext>()
.AddDefaultTokenProviders();
services.AddAuthorization(options =>
{
options.AddPolicy("RequireAdministratorRole",
policy => policy.RequireRole("Administrator"));
});
}
[Authorize(Roles = "Administrator")]
public class AdminController : Controller
{
public IActionResult Index()
{
return View();
}
}
```
9. Dependency Injection (DI) for Secure Code
DI helps manage dependencies in a secure and efficient manner, reducing the risk of security vulnerabilities related to manual instantiation.
Configure DI:
```
public void ConfigureServices(IServiceCollection services)
{
services.AddTransient<IMyService, MyService>();
services.AddScoped<IUserRepository, UserRepository>();
services.AddSingleton<ILogger, Logger<Startup>>();
}
```
Use DI in a Controller:
```
public class MyController : Controller
{
private readonly IMyService _myService;
public MyController(IMyService myService)
{
_myService = myService;
}
public IActionResult Index()
{
_myService.DoWork();
return View();
}
}
```
10. Secure API Development with JWT
JSON Web Tokens (JWT) provide a secure way to transmit information between parties as a JSON object.
Configure JWT Authentication:
```
public void ConfigureServices(IServiceCollection services)
{
services.AddAuthentication(options =>
{
options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(options =>
{
options.TokenValidationParameters = new TokenValidationParameters
{
ValidateIssuer = true,
ValidateAudience = true,
ValidateLifetime = true,
ValidateIssuerSigningKey = true,
ValidIssuer = "yourdomain.com",
ValidAudience = "yourdomain.com",
IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("YourSecretKey"))
};
});
services.AddMvc();
}
```
Generate JWT Token:
```
public string GenerateJwtToken(string userId, string username)
{
var securityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("YourSecretKey"));
var credentials = new SigningCredentials(securityKey, SecurityAlgorithms.HmacSha256);
var claims = new[]
{
new Claim(JwtRegisteredClaimNames.Sub, userId),
new Claim(JwtRegisteredClaimNames.UniqueName, username)
};
var token = new JwtSecurityToken(
issuer: "yourdomain.com",
audience: "yourdomain.com",
claims: claims,
expires: DateTime.Now.AddMinutes(30),
signingCredentials: credentials);
return new JwtSecurityTokenHandler().WriteToken(token);
}
```
Conclusion
Securing .NET Core applications involves a multi-layered approach that includes authentication and authorization, secure data handling, enforcing HTTPS, mitigating CSRF attacks, and more. By leveraging these top 10 security features in .NET Core, developers can build robust, secure applications that protect sensitive data and provide a secure user experience.
For further reading and reference, consider exploring the following resources:
[ASP.NET Core Security Documentation
](https://docs.microsoft.com/en-us/aspnet/core/security/?view=aspnetcore-5.0)
[OWASP Top Ten
](https://owasp.org/www-project-top-ten/)
[Data Protection in ASP.NET Core
](https://docs.microsoft.com/en-us/aspnet/core/security/data-protection/?view=aspnetcore-5.0)
[JWT Authentication and Authorization
](https://jwt.io/introduction/)
[Configuring HTTPS in ASP.NET Core
](https://docs.microsoft.com/en-us/aspnet/core/security/enforcing-ssl?view=aspnetcore-5.0&tabs=visual-studio)
These resources will help deepen your understanding of the security mechanisms available in .NET Core and how to effectively implement them in your applications. | amr-saafan |
1,917,544 | Get Italy Visa From Dubai - Easy Application | worldtripdeal.com | Get your Italy Visa From Dubai quickly and easily with worldtripdeal.com. Submit your documents... | 0 | 2024-07-09T15:33:17 | https://dev.to/wtdseo53/get-italy-visa-from-dubai-easy-application-worldtripdealcom-58d9 | visa, italy, dubai | Get your Italy Visa From Dubai quickly and easily with worldtripdeal.com. Submit your documents including passport, UAE visa, Emirates ID, photos, NOC letter. Call Now or Visit [](https://www.worldtripdeal.com/en/visa/italy/visa-to-italy-28) | wtdseo53 |
1,917,546 | Flutter BLoC (Business Logic Component) | Flutter BLoC (Business Logic Component) architecture is a design pattern used to manage state in a... | 0 | 2024-07-09T15:36:00 | https://dev.to/siam786/flutter-bloc-business-logic-component-57kh | Flutter BLoC (Business Logic Component) architecture is a design pattern used to manage state in a Flutter application. It separates the business logic from the UI, making the code more modular and testable. Here's an overview of how to implement the BLoC architecture in Flutter.
### 1. Setting Up Your Flutter Project
First, create a new Flutter project if you don't already have one:
```bash
flutter create my_bloc_app
cd my_bloc_app
```
### 2. Add Dependencies
Add the `flutter_bloc` and `equatable` packages to your `pubspec.yaml` file:
```yaml
dependencies:
flutter:
sdk: flutter
flutter_bloc: ^8.0.1
equatable: ^2.0.3
```
Run `flutter pub get` to install the dependencies.
### 3. Creating a BLoC
Let's create a counter example to demonstrate the BLoC architecture.
#### 3.1 Define Events
Create a file `counter_event.dart` in the `lib` directory:
```dart
import 'package:equatable/equatable.dart';
abstract class CounterEvent extends Equatable {
@override
List<Object> get props => [];
}
class Increment extends CounterEvent {}
class Decrement extends CounterEvent {}
```
#### 3.2 Define States
Create a file `counter_state.dart`:
```dart
import 'package:equatable/equatable.dart';
class CounterState extends Equatable {
final int count;
const CounterState(this.count);
@override
List<Object> get props => [count];
}
```
#### 3.3 Define BLoC
Create a file `counter_bloc.dart`:
```dart
import 'package:flutter_bloc/flutter_bloc.dart';
import 'counter_event.dart';
import 'counter_state.dart';
class CounterBloc extends Bloc<CounterEvent, CounterState> {
CounterBloc() : super(CounterState(0)) {
on<Increment>((event, emit) => emit(CounterState(state.count + 1)));
on<Decrement>((event, emit) => emit(CounterState(state.count - 1)));
}
}
```
### 4. Using the BLoC in the UI
#### 4.1 Provide the BLoC
In your `main.dart` file, wrap your `MaterialApp` with a `BlocProvider`:
```dart
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'counter_bloc.dart';
import 'counter_event.dart';
import 'counter_state.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return BlocProvider(
create: (context) => CounterBloc(),
child: MaterialApp(
home: CounterPage(),
),
);
}
}
```
#### 4.2 Create the UI
Create a file `counter_page.dart`:
```dart
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'counter_bloc.dart';
import 'counter_event.dart';
import 'counter_state.dart';
class CounterPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text('Counter')),
body: BlocBuilder<CounterBloc, CounterState>(
builder: (context, state) {
return Center(
child: Text('Count: ${state.count}', style: TextStyle(fontSize: 24)),
);
},
),
floatingActionButton: Column(
mainAxisAlignment: MainAxisAlignment.end,
children: [
FloatingActionButton(
onPressed: () => context.read<CounterBloc>().add(Increment()),
child: Icon(Icons.add),
),
SizedBox(height: 8),
FloatingActionButton(
onPressed: () => context.read<CounterBloc>().add(Decrement()),
child: Icon(Icons.remove),
),
],
),
);
}
}
```
### 5. Running the App
Now, you can run your app using:
```bash
flutter run
```
### Summary
In this example, you:
1. Created a BLoC (`CounterBloc`) that handles `Increment` and `Decrement` events and emits new states.
2. Defined events and states for the counter.
3. Provided the BLoC to the widget tree using `BlocProvider`.
4. Built the UI using `BlocBuilder` to respond to state changes and dispatch events.
This setup keeps your business logic separate from your UI, making your code more modular and easier to test. | siam786 | |
1,917,547 | React Router v6: A Comprehensive Guide to Page Routing in React | Dive into a comprehensive guide on React Router and how to implement Page Routing inside a React project. | 0 | 2024-07-09T15:38:52 | https://code.pieces.app/blog/react-router-v6-a-comprehensive-guide-to-page-routing-in-react | <figure><img src="https://d37oebn0w9ir6a.cloudfront.net/account_32099/react-router-v6_1cb0495d0ab8d945567e824b3118343f.jpg" alt="React code in an IDE."/></figure>
Users can navigate through web pages thanks to a process called routing. Routing in web applications is crucial, as it enables users to access different pages in an application upon request. Because it does not provide its own router, React must be paired with an external library called React Router.
This article will explore React Router v6, its core features, and how to implement it in your projects.
To properly understand how page routing works using React Router, you must be familiar with the following:
- [JavaScript](https://developer.mozilla.org/en-US/docs/Web/JavaScript)
- [React](https://code.pieces.app/blog/react-19-comprehensive-guide)
- [Node JS](https://nodejs.org/en)
## What is React Router?
React Router is [a library that provides the functionality](https://reactrouter.com/en/main) for client-side routing in React. It’s widely used in building [single-page applications (SPAs)](https://developer.mozilla.org/en-US/docs/Glossary/SPA). React Router's major importance lies in its ability to navigate from one page to another in an application while providing a seamless user experience. With this library, users can navigate to pages on a website without triggering a page reload every time a new page is clicked. This also improves the speed and performance of an application.
## Features of React Router
The need for React Router and its importance expands beyond the navigation of web pages. It provides additional helpful features, some of which we will discuss in this section.
- **Client-side Routing**: Client-side routing allows users to access content from a web page without an additional server request. This removes the need for a page to reload as its content becomes available immediately after its link is clicked. This is a major upgrade to traditional websites where a page reload is initiated every time a user clicks a link.
- **Dynamic Routing**: React React Router adopts the dynamic approach of routing which allows routes to be defined during an application’s rendering state. This leads to faster load times and the development of more complex applications.
- **Redirects**: With React Router, you can conditionally navigate to a new route. Redirects allow users to navigate to a new location that overrides the history stack's current location. For example, a login page should redirect to a dashboard page after successful user authentication.
- **<Suspense/>**: With React suspense in React-Router, you can include a skeleton UI that serves as a placeholder when a new page is loaded or a data fetch process is completed.
- **Error Handling**: React Router 6 handles most of the errors in your application, catching errors that are thrown while rendering, loading, or updating data.
## What’s New in React Router v6?
In addition to the features discussed above, React Router v6 introduces significant improvements and major breaking changes from the previous versions.
- **Nested Routes**: The new version of React Router allows the use of nested routes, a powerful feature used to define a particular route inside another route. This is especially useful in blogs where you need to render multiple components on the same page following a particular sequence. For example, a blog comment component should only be accessed after a particular blog post component has been rendered.
- **Routes Component**: The <Routes> component replaces the <Switch> component in v6, further simplifying React routing and improving user experience.
- **Smaller Bundle Size:** Compared to v5, React Router v6 has a significantly smaller bundle size, which allows developers to build more performant applications.
- **Relative Links**: Unlike previous versions of React Router, v6 comes with relative links. This defeats the need for explicitly defining a React Router <Link> or <Route> for a child route as it automatically takes the URL of the parent route.
- **Improved Redirect Functionality**: Redirects are implemented using the <Navigate> component, replacing `history.push` and `history.replace` as used in v5.
- **<Outlet />**: The `<Outlet/>` component simplifies the logic of implementing nested routes in React Router v6.
- **useParams Hook**: This version provides a way to access the dynamic parts of a URL. This is very helpful when working with dynamic URL paths such as fetching data using a user ID or blog posts using a slug.
## React Router Components
React Router provides built-in components that allow us to implement page routing. The major components include:
- **BrowserRouter**: The BrowserRouter is the parent component that stores other components. It keeps the application’s UI in sync with the URL by storing the current location in the browser’s address bar. Here’s an example:
```
import * as React from "react";
import { createRoot } from "react-dom/client";
import { BrowserRouter } from "react-router-dom";
const root = createRoot(document.getElementById("root"));
root.render(
<BrowserRouter>
{/* App routes */}
</BrowserRouter>
);
```
- **Link**: The Link component is used to create links in your application. It is similar to the `<a>` tag in HTML but does not trigger a page reload when clicked, making it suitable for single-page applications (SPA). Here’s an example:
```
import { Link } from 'react-router-dom';
function Navigation() {
return (
<nav>
<ul>
<li>
<Link to="/">Home</Link>
</li>
<li>
<Link to="/about">About</Link>
</li>
</ul>
</nav>
);
}
export default Navigation;
```
- **Route**: The React route component controls the rendering of web pages by rendering page content if the current URL matches the path specified in the Route component. Here’s how it is used:
```
<Route path="/" element={<HomePage />} />
<Route path="/about" element={<AboutPage />} />
```
- **Routes**: Introduced in v6, the React Routes component contains multiple routes in your application. The <Routes> component replaced the <Switch> component used in React Router v5 and older versions.
```
import { BrowserRouter as Router, Routes, Route } from 'react-router-dom';
import HomePage from './HomePage';
import AboutPage from './AboutPage';
function App() {
return (
<Router>
<Routes>
<Route path="/" element={<HomePage />} />
<Route path="/about" element={<AboutPage />} />
</Routes>
</Router>
);
}
export default App;
```
## Installation
To use the library and improve your routing with Reactjs, you must have React installed and set up on your machine. Follow these steps to get started:
1. Open your terminal and run this command to create a new React project (using Vite):
```
npm create vite react-router-project react
```
2. Install the React Router library:
```
npm install react-router-dom@latest
```
3. Open your main.js (or index.js) file and wrap your App component in the `BrowserRouter` component:
```
import React from 'react';
import ReactDOM from 'react-dom/client';
import './index.css';
import App from './App';
import reportWebVitals from './reportWebVitals';
import { BrowserRouter } from 'react-router-dom';
const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(
<React.StrictMode>
<BrowserRouter>
<App />
</BrowserRouter>
</React.StrictMode>
);
```
[Save this code](https://jamesamoo.pieces.cloud/?p=5fd6469647)
Now we’re all set! We can now see how we’ll navigate web pages with the help of the React Router.
## Implementing Page Routing with React Router v6
In this section, we’ll look at a practical example of implementing page routing using React Router. Our goal is to navigate between different pages of a web application without triggering a reload. First, we start by creating our Navbar, which will contain our links:
```
import { Link } from "react-router-dom";
const Navbar = () => {
return (
<nav>
<ul>
<li>
<Link to="/">Home</Link>
</li>
<li>
<Link to="/about">About Pieces</Link>
</li>
<li>
<Link to="/snippet">Code Snippet</Link>
</li>
</ul>
</nav>
);
}
export default Navbar
```
[Save this code](https://jamesamoo.pieces.cloud/?p=177c4cabcd)
Here, we have created three links using the `Link` component from `react-router-dom`. We can then create the files that contain the pages’ content when the links are clicked. Let’s start by creating a simple component for our Home page:
```
//Home.js
import React from 'react'
import Navbar from './Navbar'
const Home = () => {
return (
<div>
<Navbar />
<h3>Welcome to the Pieces Tutorial</h3>
</div>
)
}
export default Home
```
After creating the home page, we’re left with two pages. Let’s create the “About Pieces” page next:
```
import React from "react";
import Navbar from "./Navbar";
const About = () => {
return (
<div>
<Navbar />
<h3>
Pieces is your AI-enabled productivity tool designed to supercharge
developer efficiency
</h3>
<h3>Unify your entire toolchain with an on-device copilot</h3>
</div>
);
};
export default About;
```
Finally, let’s create our ‘Code Snippet” page:
```
//Snippet.js
import React from "react";
import Navbar from "./Navbar";
const Snippet = () => {
return (
<div>
<Navbar />
<h3>Code Snippet</h3>
<h3>Have a full explanation and use case of the code provided</h3>
<h3>Determine possibilities and limitations of code</h3>
<h3>Ask specific questions based on the code provided.</h3>
</div>
);
};
export default Snippet;
```
After creating the content for these web pages, we can use the routing functionality offered by the React Router. In your `App.js` file, import the `Routes` and `Route` component from the library:
```
import { Route, Routes } from 'react-router-dom';
import './App.css';
import Home from './Home';
import About from './About';
import Snippet from './Snippet';
function App() {
return (
<div className="App">
<Routes>
<Route path='/' element={<Home/>} />
<Route path='/about' element={<About/>} />
<Route path='/snippet' element={<Snippet/>} />
</Routes>
</div>
);
}
```
[Save this code](https://jamesamoo.pieces.cloud/?p=c10f408720)
As we explained earlier, the `Route` components are wrapped in `Routes`. The element contains the component to be rendered when a path matches a URL. Here’s how the code snippet behaves in our browser:
<figure><img src="https://d37oebn0w9ir6a.cloudfront.net/account_32099/image1_c54aebb79c9d5b3b7c0b73e374c7d90a.gif" alt="The very basic webpage created in this tutorial."/></figure>
We’ve successfully implemented page routing using React js Router! We see that other pages are loaded without triggering a full page reload.
## React Router x Pieces: Staying Ahead of the Curve
Are you excited about the React Router update and eager to use it in development? You don’t have to do it alone; Pieces is here to help! Here are three ways Pieces can help you in your journey:
1. **Collections**: Stay ahead of coding with the Pieces-curated [JavaScript Snippet Collection](https://code.pieces.app/collections/javascript), which contains common and helpful snippets in development. This snippet collection removes the need to write code from scratch, saving you time.
1. **Pieces Copilot**: Can’t find your specific use case in the snippets collection? [Pieces Copilot](https://code.pieces.app/blog/maximizing-development-efficiency-with-pieces-copilot) provides contextualized code generation specifically tailored to your codebase. Explore the exciting possibilities of React Router with the help of the Pieces Copilot.
1. **Community**: Do you have any questions or are you curious to know more about React’s features? The [Pieces Discord community](https://discord.com/invite/getpieces) would love to chat! This fast-growing community of friendly developers is eager to learn, help with debugging, and build using exciting languages and the [Pieces API](https://github.com/pieces-app).
## Conclusion
React Router provides a smooth experience when navigating between web pages, leading to an overall improved user experience. In this blog post, you have learned about React Router and its features, components, and implementation of page routing using it. Further, you learned three key aspects that Pieces can help you with when implementing page routing or throughout your entire development process. Happy coding! | get_pieces | |
1,917,548 | Asinxron/Fetch/Https | Asinxron "Asinxron" so'zi bir vaqtda bo'lmagan yoki bir vaqtda amalga oshirilmagan degan ma'noni... | 0 | 2024-07-09T15:39:40 | https://dev.to/bekmuhammaddev/asinxronfetchhttps-inc | javascript, frontend, asinxron, https | **Asinxron**
"Asinxron" so'zi _bir vaqtda bo'lmagan yoki_ _bir vaqtda amalga oshirilmagan_ degan ma'noni anglatadi. Kompyuter dasturlashida asinxron kod deganda dastur bajarilishi davomida boshqa kodlar bilan parallel ravishda bajarilishi mumkin bo'lgan kod tushuniladi. Bu kodning bajarilishi natijasini kutish shart emas, ya'ni boshqa kodlar bajarilishini davom ettirishi mumkin.
Sinxron kod: Har bir kod qatori ketma-ketlikda bajariladi. Bir qator tugamasa, keyingi qator boshlanmaydi.
```
console.log('Birinchi');
console.log('Ikkinchi');
console.log('Uchinchi');
```
Asinxron kod: Ba'zi kod qatorlari bajarilishi vaqt talab qilishi mumkin, masalan, serverga so'rov yuborish yoki fayl o'qish. Bu jarayonlar tugaguniga qadar boshqa kodlar bajarilishi davom ettiriladi.
```
console.log('Birinchi');
setTimeout(() => {
console.log('Ikkinchi');
}, 1000); // 1 soniyadan keyin bajariladi
console.log('Uchinchi');
```
setTimeout funksiyasi asinxron ravishda ishlaydi. setTimeout funksiyasi 1 soniyadan keyin "Ikkinchi" qatorini konsolga chiqaradi, ammo dastur bu vaqt davomida "Uchinchi" qatorini chiqarishni davom ettiradi.
Serverga so'rov yuborish va javobni kutish: fetch funksiyasi serverga so'rov yuboradi va javob kelgunicha dastur boshqa ishlarni bajarishi mumkin.
Fayl tizimi bilan ishlash: Faylni o'qish yoki yozish jarayonida dastur boshqa vazifalarni bajarishi mumkin.
Taymerlar va intervallar: Ma'lum vaqt o‘tgach yoki intervalda kodni bajarish.
Asinxronlikning Afzalliklari:
Tezkorlik: Ko'p vazifali dasturlash imkoniyati. Bir vaqtning o'zida bir nechta vazifalarni bajarish imkonini beradi.
Foydalanuvchi tajribasi: Foydalanuvchi interfeysi osonlik bilan bloklanmaydi va javob beruvchi bo‘lib qoladi.
**Asinxron Kodinga JavaScriptda Yondashuvlar:**
- Callbacks: Funksiyalarni argument sifatida uzatish.
- Promises: Vaqt talab qiluvchi operatsiyalar uchun natija yoki xatoni qaytaruvchi obyektlar.
- Async/Await: Promises bilan ishlashni soddalashtiruvchi sintaktik qobiq.
```
async function getData() {
try {
let response = await fetch('https://api.example.com/data');
let data = await response.json();
console.log(data);
} catch (error) {
console.error('Xato:', error);
}
}
getData();
```
Ushbu misolda await kalit so'zi fetch va response.json() funksiyalarining natijalarini kutib turadi va kodni ko'rib chiqishni osonlashtiradi.
**fetch Funksiyasidan Foydalanish**
```
// URL dan ma'lumot olish
fetch('https://api.example.com/data')
.then(response => {
// Javobni JSON formatga o'girish
return response.json();
})
.then(data => {
// Olingan ma'lumotni ishlatish
console.log(data);
})
.catch(error => {
// Xatolarni tutish
console.error('Xato:', error);
});
```
HTTP So'rov Turlari
fetch yordamida GET, POST, PUT, DELETE kabi turli xil HTTP so'rovlarini amalga oshirish mumkin. Quyida POST so'rovi misoli keltirilgan:
```
fetch('https://api.example.com/data', {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({
ism: 'Ali',
yosh: 25
})
})
.then(response => response.json())
.then(data => {
console.log('Yangi yozuv qo\'shildi:', data);
})
.catch(error => {
console.error('Xato:', error);
});
```
**HTTPS STATUS CODLARI**
 | bekmuhammaddev |
1,917,549 | Preview let syntax in HTML template in Angular 18 | Introduction In this blog post, I want to describe the let syntax variable that Angular... | 27,826 | 2024-07-09T15:50:35 | https://www.blueskyconnie.com/preview-the-let-syntax-in-html-template-in-angular-18/ | angular, tutorial, webdev | ##Introduction
In this blog post, I want to describe the let syntax variable that Angular 18.1.0 will release. This feature has debates in the Angular community because some people like it, others have concerns, and most people don't know when to use it in an Angular application.
I don't know either, but I use the syntax when it makes the template clean and readable.
###Bootstrap Application
```typescript
// app.routes.ts
import { Routes } from '@angular/router';
export const routes: Routes = [
{
path: 'let-syntax',
loadComponent: () => import('./app-let-syntax.component'),
title: 'Let Syntax',
},
{
path: 'before-let-syntax',
loadComponent: () => import('./app-no-let-syntax.component'),
title: 'Before Let Syntax',
},
{
path: '',
pathMatch: 'full',
redirectTo: 'let-syntax'
},
{
path: '**',
redirectTo: 'let-syntax'
}
];
```
```typescript
// app.config.ts
import { provideHttpClient } from "@angular/common/http";
import { provideRouter } from "@angular/router";
import { routes } from "./app.routes";
import { provideExperimentalZonelessChangeDetection } from "@angular/core";
export const appConfig = {
providers: [
provideHttpClient(),
provideRouter(routes),
provideExperimentalZonelessChangeDetection()
],
}
```
```typescript
// main.ts
import { appConfig } from './app.config';
bootstrapApplication(App, appConfig);
```
Bootstrap the component and the application configuration to start the Angular application. The application configuration provides a HttpClient feature to make requests to the server to retrieve a collection of products, a Router feature to lazy load standalone components, and experimental zoneless.
The first route, `let-syntax`, lazy loads `AppLetSyntaxComponent` that uses the let syntax. The second route, `before-let-syntax`, lazy loads `AppNoLetSyntaxComponent` that does not use the let syntax. Then, I can compare the differences in the templates and explain why the let syntax is good in some cases.
###Create a Product Service
I created a service that requests the backend to retrieve a collection of products. Then the standalone components can reuse this service.
```typescript
// app.service.ts
import { HttpClient } from "@angular/common/http";
import { Injectable, inject } from "@angular/core";
const URL = 'https://fakestoreapi.com/products';
type Product = {
id: number;
title: string;
description: string;
category: string;
image: string;
rating: {
rate: number;
}
}
@Injectable({
providedIn: 'root',
})
export class AppService {
http = inject(HttpClient);
products$ = this.http.get<Product[]>(URL);
}
```
###Create the main component
The main component is a simple component that routes to either `AppLetSyntaxComponent` or `AppNoLetSyntaxComponent` to display a list of products.
```typescript
// main.ts
import { ChangeDetectionStrategy, Component, VERSION } from '@angular/core';
import { RouterLink, RouterLinkActive, RouterOutlet } from '@angular/router';
import { appConfig } from './app.config';
@Component({
selector: 'app-root',
standalone: true,
imports: [RouterOutlet, RouterLink, RouterLinkActive],
template: `
<header>Angular {{version}}</header>
<h1>Hello @let demo</h1>
<ul>
<li>
<a routerLink="let-syntax" routerLinkActive="active-link">Let syntax component</a>
</li>
<li>
<a routerLink="before-let-syntax" routerLinkActive="active-link">No let syntax component</a>
</li>
</ul>
<router-outlet />
`,
changeDetection: ChangeDetectionStrategy.OnPush,
})
export class App {
version = VERSION.full;
}
```
The unordered list displays two hyperlinks for users to click. When a user clicks the first link, Angular loads and renders `AppLetSyntaxComponent`. When a user clicks the second link, `AppNoLetSyntaxComponent` is rendered instead.
###Create a component that uses the syntax
This simple component uses the let syntax in the template to make it clean and readable.
```typescript
// app-let-syntax.component.ts
import { AsyncPipe } from "@angular/common";
import { ChangeDetectionStrategy, Component, inject } from "@angular/core";
import { AppService } from "./app.service";
@Component({
selector: 'app-let-syntax',
standalone: true,
imports: [AsyncPipe],
template: `
<div>
@let products = (products$ | async) ?? [];
@for (product of products; track product.id; let odd = $odd) {
@let rate = product.rating.rate;
@let isPopular = rate >= 4;
@let borderStyle = product.category === "jewelery" ? "2px solid red": "";
@let bgColor = odd ? "#f5f5f5" : "goldenrod";
<div style="padding: 0.75rem;" [style.backgroundColor]="bgColor">
<div [style.border]="borderStyle" class="image-container">
<img [src]="product.image" />
</div>
@if (isPopular) {
<p class="popular">*** Popular ***</p>
}
<p>Id: {{ product.id }}</p>
<p>Title: {{ product.title }}</p>
<p>Description: {{ product.description }}</p>
<p>Rate: {{ rate }}</p>
</div>
<hr>
}
</div>
`,
changeDetection: ChangeDetectionStrategy.OnPush,
})
export default class AppLetSyntaxComponent {
service = inject(AppService);
products$ = this.service.products$;
}
```
The component injects `AppService`, makes a GET request to retrieve products, and assigns to `products$` Observable.
The demo applies the let syntax to the HTML template.
```html
@let products = (products$ | async) ?? [];
```
The AsyncPipe resolves the products$ Observable or default to an empty array
```html
@let rate = product.rating.rate;
@let isPopular = rate >= 4;
```
I assigned the product rate to the rate variable and derived the isPopular value. It is true when the rate is at least 4, otherwise, it is false.
```html
@if (isPopular) {
<p class="popular">*** Popular ***</p>
}
<p>Rate: {{ rate }}</p>
```
`isPopular` is checked to display ***Popular*** paragraph element and rate is displayed along with other product information.
```html
@let borderStyle = product.category === "jewelery" ? "2px solid red": "";
@let bgColor = odd ? "#f5f5f5" : "goldenrod";
<div style="padding: 0.75rem;" [style.backgroundColor]="bgColor">
<div [style.border]="borderStyle" class="image-container">
<img [src]="product.image" />
</div>
....
</div>
```
When the product's category is jewelry, the border style is red and 2 pixels wide, and it is assigned to the `borderStyle` variable. When array elements have odd indexes, the background color is "#f5f5f5". When the index is even, the background color is goldenrod, which is assigned to the `bgColor` variable.
The variables are assigned to style attributes, backgroundColor and border, respectively.
Let's repeat the same exercise without the let syntax.
###Create the same component before the let syntax exists
```typescript
// ./app-no-let-syntax.componen.ts
import { AsyncPipe } from "@angular/common";
import { ChangeDetectionStrategy, Component, inject } from "@angular/core";
import { AppService } from "./app.service";
@Component({
selector: 'app-before-let-syntax',
standalone: true,
imports: [AsyncPipe],
template: `
<div>
@if (products$ | async; as products) {
@if (products) {
@for (product of products; track product.id; let odd = $odd) {
<div style="padding: 0.75rem;" [style.backgroundColor]="odd ? '#f5f5f5' : 'yellow'">
<div [style.border]="product.category === 'jewelery' ? '2px solid green': ''" class="image-container">
<img [src]="product.image" />
</div>
@if (product.rating.rate > 4) {
<p class="popular">*** Popular ***</p>
}
<p>Id: {{ product.id }}</p>
<p>Title: {{ product.title }}</p>
<p>Description: {{ product.description }}</p>
<p>Rate: {{ product.rating.rate }}</p>
</div>
<hr>
}
}
}
</div>
`,
changeDetection: ChangeDetectionStrategy.OnPush,
})
export default class AppNoLetSyntaxComponent {
service = inject(AppService);
products$ = this.service.products$;
}
```
Let me list the differences
```html
@if (products$ | async; as products) {
@if (products) {
....
}
}
```
I used nested ifs to resolve the Observable and test the products array before iterating it to display the data.
```html
@if (product.rating.rate > 4) {
<p class="popular">*** Popular ***</p>
}
<p>Rate: {{ product.rating.rate }}</p>
```
`product.rating.rate` occurs twice in the HTML template.
```html
[style.backgroundColor]="odd ? '#f5f5f5' : 'yellow'"
[style.border]="product.category === 'jewelery' ? '2px solid green': ''"
```
The style attributes are inline and not easy to read inside the tags.
I advise keeping the let syntax to a minimum in an HTML template. Some good use cases are:
- style attributes
- class enablement. Enable or disable a class by a boolean value
- resolve Observable by AsyncPipe
- extract duplicated
The following Stackblitz repo displays the final results:
{%embed https://stackblitz.com/edit/angular-let-demo-uxsvu6?file=src%2Fmain.ts %}
This is the end of the blog post that introduce the preview feature, let syntax in Angular 18. I hope you like the content and continue to follow my learning experience in Angular, NestJS, GenerativeAI, and other technologies.
##Resources:
Stackblitz Demo: https://stackblitz.com/edit/angular-let-demo-uxsvu6?file=src%2Fmain.ts | railsstudent |
1,917,553 | veterinary | https://maps.google.com/maps?cid=5978527005209815401 | 0 | 2024-07-09T15:47:05 | https://dev.to/veterinary/veterinary-1cl8 | [https://maps.google.com/maps?cid=5978527005209815401](https://maps.google.com/maps?cid=5978527005209815401) | veterinary | |
1,917,554 | veterinary | https://drive.google.com/drive/folders/1Xxwu3c_AM4mLu9mmSc99qD2YZDiYW6eo?usp=sharing | 0 | 2024-07-09T15:47:40 | https://dev.to/veterinary/veterinary-2jkn | [https://drive.google.com/drive/folders/1Xxwu3c_AM4mLu9mmSc99qD2YZDiYW6eo?usp=sharing](https://drive.google.com/drive/folders/1Xxwu3c_AM4mLu9mmSc99qD2YZDiYW6eo?usp=sharing) | veterinary | |
1,917,555 | What is Cloud Computing ? | Tired of Expensive IT Costs and Managing Servers? Cloud Computing Can Be Your... | 0 | 2024-07-10T17:06:01 | https://dev.to/jesse_adu_akowuah_/what-is-cloud-computing--2kgf | beginners, aws, learning, cloud | ## Tired of Expensive IT Costs and Managing Servers? Cloud Computing Can Be Your Game-Changer!
The concept of cloud computing revolves around the provision of IT services to end users for a fee. Unlike traditional computing where users shoulder the upfront costs for every capability they need, cloud computing offers a more flexible and cost-effective solution.
Imagine a bank requiring a server for its network operations. Traditionally, they'd need a physical location to house the servers, purchase and install them, and dedicate staff to manage them. Cloud computing eliminates all these upfront costs by providing the bank's server needs over the internet.
## Cloud Computing Benefits: Numerous Advantages for Businesses
Cloud computing offers a multitude of benefits for businesses of all sizes. Here are some key advantages:
* **Cost Efficiency:** Cloud computing's biggest edge over traditional IT is its ability to save customers money. Since it's essentially "on-demand IT," you avoid the upfront costs of acquiring traditional IT infrastructure.
* **Accessibility:** This computing option allows for service accessibility at various locations across the internet for the same client. This empowers remote work for startups and small companies, fostering a more flexible work environment.
* **Security:** Cloud providers invest heavily in security measures to safeguard your data. Regular backups and disaster recovery features ensure business continuity in case of unforeseen events. For instance, cloud providers like Amazon Web Services (AWS) and Microsoft Azure utilize encryption to safeguard your data at rest and in transit.
* **Scalability:** The cloud allows you to easily scale resources (storage, computing power, and networking) up or down as your needs evolve. No need to invest in expensive hardware upfront; you only pay for what you use. Cloud resources can automatically scale up during peak hours and down during slower periods, optimizing costs and performance.
## Cloud Deployment Models: Choosing the Right Fit
Cloud service providers offer various deployment models to cater to different client needs. Here's a breakdown of the fundamental types:
* **Public Cloud:** A cloud deployment model where a third-party manages all the services, and cloud resources are delivered through the internet. Many companies share the same resources from the public cloud.
* **Private Cloud:** A cloud deployment system where a single company exclusively uses the architecture and infrastructure. The infrastructure can be on-premises or hosted by a third party.
* **Hybrid Cloud:** A cloud deployment model that combines both public and private cloud computing models, allowing transfer of data and resources between the two.
## Cloud Service Models: A Spectrum of Services
Cloud service providers offer three main service models that clients can choose from:
* **Infrastructure as a Service (IaaS):** Offers all computing resources and infrastructure in a virtual environment accessible to multiple users. Services include storage, databases, servers, and networking. Examples of IaaS include virtual machines, storage, and networking equipment.
* **Platform as a Service (PaaS):** An environment where users can build, compile, and run their programs without managing the underlying infrastructure. This caters primarily to software developers. Examples of PaaS include Heroku, Google App Engine, and Microsoft Azure App Service.
* **Software as a Service (SaaS):** Provides pay-per-use access to application software for end users. Accessible with either a web browser or a lightweight software application. End customers benefit the most from SaaS. Examples of SaaS include Microsoft Office 365, Gmail, Salesforce, Dropbox, Zoom, and Slack.
| jesse_adu_akowuah_ |
1,917,558 | Unleashing the Power of Decentralized Finance - Understanding its Crucial Role in Today's Economy | In the exhilarating world of digital currency, a new paradigm shift is carving out a niche. This... | 0 | 2024-07-09T15:51:30 | https://dev.to/bird_march/unleashing-the-power-of-decentralized-finance-understanding-its-crucial-role-in-todays-economy-4akd | cryptocurrency, ethereum, bitcoin | In the exhilarating world of digital currency, a new paradigm shift is carving out a niche. This variant makes use of a distributed model, in contrast to the conventional centralized approach. By eliminating mediators, it empowers users to gain total control over their funds and transactions.
This innovative method stands out as a crucial pillar of the blockchain network. It morphs traditional financial services into trustless, permissionless systems that offer transparency, resiliency, and improved efficiency.
The pervasive influence of this system acts as a powerful game-changer in the economic landscape, proving its potential through various applications. This notion is thrilling, evoking curiosity, provoking the urge to understand better what exactly is it, and how it works. This guide provides you with crisp information, delineating the importance and relevance of this riveting element in today's world.
The Origin and Purpose of [DeFiLlama](https://defillama.co/)
This section is dedicated to exploring the emergence and objective of an essential protagonist in the world of Chain-based economy networks, specifically DeFiLlama. Through this exploration, a deeper understanding of the ecosystem within which this entity operates will be achieved, shedding light on its diverse functionalities.
The birth of DeFiLlama came about as a response to an increasingly complex, proliferative Chain-based economic ecosystem. It set out to present a comprehensive, clear view of this intricate, expansive sphere, bringing transparency to its numerous participants and interested investors. As of today, it's known as one of the most reliable platforms for tracking Chain-based assets.
The main purpose of [DeFiLlama](https://defillama.co/) is to present all necessary data connected to these digital assets, exhibiting metrics from a multitude of Blockchain networks. Aside from being a hub of broad-spectrum, up-to-date data, it also offers users the opportunity to deeply explore each available project and their particular nuances.
Key Functions of DeFiLlama
Providing comprehensive, reliable, and up-to-the-minute data insight into digital assets.
Providing in-depth knowledge and exploration of individual projects and their specifications.
Playing its part in maintaining a fair, transparent, and well-regulated Chain-based economic ecosystem.
In conclusion, the inception of DeFiLlama triggered a transformative mechanism in the Chain-based sphere by fetching and providing critical data to its users. It brought about a significant change in how investors, users, and blockchain enthusiasts interact with Chain-based financial systems, thereby evolving and enhancing the global economic landscape.
How Does DeFiLlama Work?
In this part, we shall explore a major platform in autonomous banking - DeFiLlama. Deciphering how it operates to give you a better understanding and help you harness its full potential in your financial management journey.
DeFiLlama majorly operates by tracking and providing valid info on different DeFi projects. To provide a comprehensive perspective, we are going to disintegrate its functionality into key aspects, as follows:
Active Monitoring: DeFiLlama keeps an active tab on a host of DeFi sectors, generating real-time data that can steer your decisions in a proactive manner.
Data Aggregation: This platform drills deeper into individual DeFi projects, capturing unique characteristics and performance indicators. This data is vital for your investment strategies.
Comparative Analysis: DeFiLlama organizes data in a comprehensible format. It allow users to juxtapose different projects, facilitating comprehensive evaluation. Grasp the chance to compare to make informed choices.
Token Tracking: For each project listed, DeFiLlama displays the tokens associated with every project. This feature enriches your knowledge about tokens you might be interested in.
In sum, DeFiLlama seamlessly intertwines real-time tracking, data aggregation, comparative analysis, and token tracking, to foster smart decision making in autonomous banking. Crafted with a simplistic design, this platform effortlessly leads you through your journey, demystifying complexities associated with this sector.
A Look at Technology Behind DeFiLlama
In this segment, we dive into intricacies of contemporary mechanisms powering DeFiLlama. Setting aside specific terminologies, we present an overarching outline that provides a birds-eye perspective on functioning of this cutting-edge system.
Understanding mechanics behind [DeFiLlama](https://defillama.co/) sheds light on cogwheels of a transformative system. Essentially, it is a digital infrastructure helping ascertain guidance in an environment as fluid as digital asset monitoring. It provides investors with data related to liquidity, strength of assets, global exposure, among other crucial pointers. Delving into its underlying technology can prove invaluable to those looking to comprehend complexities of digital asset management platforms.
At its core, DeFiLlama leverages blockchain, a form of distributed ledger system that ensures transactions are transparent, verifiable, and immutable. Blockchain serves as a backbone, maintaining reliability and security. With use of this groundbreaking technology, DeFiLlama redefines way investors access, analyze, and interpret market data.
Moreover, it employs smart contract functionality, which automatizes agreement executions upon meet conditions without need for intermediaries. These self-executing contractual states drastically reduce potential for disputes, making processes efficient and dependable. Additionally, its interoperability across various blockchain platforms significantly enhances its versatility and applicability in a broad spectrum of situations.
Another crucial aspect is its user interface (UI) grounded on simplicity. Prioritizing accessibility and user experience, base is set for intuitive navigation even for individuals with minimal technical expertise. This plays fundamental part in ensuring that DeFiLlama remains approachable by wide range of users.
In essence, it's an amalgamation of these technologies that form DeFiLlama's bedrock, validating it as an important tool in digital asset monitoring and evaluation. Looking beyond conventional methodologies, DeFiLlama certainly breaks new ground in disruption of traditional market analysis paradigms.
Examples of DeFiLlama Tracking Capabilities
Have you ever wondered how efficient and result-oriented DeFiLlama can be as a robust tracking platform? We are here to elucidate a few emulated scenarios that will demystify the extensive tracking capabilities of this esteemed platform. Buckle up to unlock the power of DeFiLlama!
Monitoring Digital Assets: DeFiLlama excels in monitoring digital assets across several chains. Whether it is about getting real-time alerts or portfolio management solutions, DeFiLlama has a lot to offer.
Assessment of Liquidity Providers: DeFiLlama provides the unique advantage of assessing liquidity providers on different platforms. This helps in gaining a comprehensive view of the industry, aiding the making of informed business decisions.
Yield Farming Data: DeFiLlama offers an insightful perspective into yield farming data. It ensures users stay alert with their data analytics and promotes an effective investment strategy.
DeFiLlama, with its sweeping range of tracking capabilities, makes it an excellent choice for individuals marking their space in the digital asset industry. The examples mentioned above attest to the user-friendly, quick, and unintrusive nature of DeFiLlama. As a result, it nestles as a tool of choice among industry-experts and beginners alike.
Inter-chain Tracking: DeFiLlama's inter-chain tracking allows users to stay updated about their investments across various blockchains. This provides a unified space to trace asset performance devoid of space constraints.
Real-time Analysis: Real-time data analysis is another feather in the cap of DeFiLlama. With this feature, users get access to the most up-to-date data, enabling them to make timely decisions to enhance their profitability.
Security Audits: DeFiLlama arranges regular security audits that can provide an overview of the level of stability and security of different dApps. This offer of comprehensive insights aids in reducing potential digital risks.
In the dynamic world of digital assets, nothing stays constant. Hence, the aid of DeFiLlama, with its extensive monitoring capabilities, can be instrumental in leveraging opportunities and minimizing risks.
Benefits and Limitations of DeFiLlama
In this section, we will delve into both the merits and drawbacks that associate with utilizing DeFiLlama. We shall refrain from using too complicate terminologies, focusing instead on uncovering a simple understanding of why DeFiLlama can be vital for your enterprise also its potential drawbacks.
Merits of DeFiLlama
DeFiLlama, as a tool in digital asset management, offers numerous benefits, some of which are:
Extensive Coverage: It covers a wide range of digital asset networks making it a single-point hub for viewing data from various networks.
Versatility: DeFiLlama is not only restricted to displaying data. It also plays important parts in tracking your assets, providing analytical insights, and more.
Open-source: The open source nature of DeFiLlama allows for versatile integration. It can be easily implemented into an existing system without any issues.
User-friendly Interface: The user interface design is easy to understand and navigate, even for those without extensive knowledge about digital asset management.
Drawbacks of DeFiLlama
Despite its many merits, ranging across versatility, coverage, and more, DeFiLlama exhibits a few drawbacks that are worth mentioning:
Technical Complexity: While the user interface is simplified, the operational aspect requires a fair bit of technological understanding.
Scalability: The system's scalability can present some limitations when dealing with an exceptionally large number of assets or networks.
Reliance on Community: As an open-source tool, much of its development and improvement relies on the contributions of the community, which can occasionally lead to inconsistent updates.
Data Accuracy: While every effort is made to ensure accuracy, data can sometimes be slightly off due to the sheer number of sources it pulls from.
Whether the benefits outweigh the pitfalls is a decision left to individual users. It relies heavily on the unique requirements and resources of every user or enterprise.
The Advantages of Using DeFiLlama for Decentralized Finance Tracking
In the rapidly evolving world of internet-based monetary systems, staying on top of transactions can indeed be a challenge. This is where a robust monitoring tool like DeFiLlama steps in, essentially transforming how you manage your digital assets. Picture a comprehensive solution, specifically crafted towards offering real-time insights for your digital asset investments. This section delves into the remarkable benefits of DeFiLlama, your go-to choice for managing digital currency transactions.
One of the most compelling benefits of DeFiLlama is its capacity to provide accurate, real-time data. This invaluable feature ensures that all information regarding your investments is only a click away, granting you full oversight of your assets at any given time. Imagine having all essential data at your fingertips, empowering you to make informed decisions based on up-to-the-minute information. This is indeed what DeFiLlama offers you.
Utility is another area where DeFiLlama shines. Its user interface is intuitive, making it easy even for people new to digital currencies to navigate. DeFiLlama values your time. With easy-to-understand, visually striking charts and graphs, this platform ensures that you don't spend excessive time crunching numbers. Instead, DeFiLlama assists you in understanding the bigger picture instantly, enabling you to focus on making fruitful investment decisions.
Lastly, DeFiLlama is known for its broad spectrum of supported protocols. You won't have to worry about being limited to a few protocols. DeFiLlama supports numerous blockchain platforms, meaning all your digital asset management needs are catered for comprehensively. This is an essential feature, especially in a digital realm where interoperability is increasingly becoming of high importance.
In conclusion, the advantages of using DeFiLlama for overseeing your virtual currency transactions are clear. Track your digital assets effortlessly and turn complexity into simplicity. Embrace a broader perspective, with a firm grasp on your capital, by opting for DeFiLlama.
Potential Drawbacks and How to Overcome Them
In an era where financial systems have drastically shifted towards virtual platforms, transforming many of our financial transactions, it is also essential to acknowledge some potential pitfalls of these systems. This section attempts to discuss some of the potential drawbacks one might experience, along with solutions that could mitigate them.
Let's delve into some of these drawbacks:
Inefficiencies in Distributed Ledger Technology
Governance issues
Lack of regulatory oversight
Security and privacy concerns
Albeit these pitfalls, here are some effective solutions to counteract them:
Solution for Inefficiencies in Distributed Ledger Technology: To overcome inefficiencies, it might be beneficial to invest in developing faster and more efficient systems, which are both scalable and sustainable, along with maintaining robustness and security.
Solution for Governance issues: Issues of governance can be addressed by fostering a community that values transparency and robust decision-making processes. A clear, effective governance model can help in reducing uncertainty and increasing trust amongst users.
Solution for Lack of regulatory oversight: While regulations can impede innovation, creating a balanced, fair system that ensures customer protection without hampering the evolutionary process is crucial. On the other hand, users should be educated about potential scams and risk factors associated.
Solution for Security and Privacy concerns: Building secure systems is paramount. Furthermore, educating users about basic cybersecurity practices and encouraging the use of security measures like multifactor authentication can significantly reduce the risk of security breaches.
Conclusively, by acknowledging these potential drawbacks and investing in sound strategies to overcome them, we can pave the way for a more accessible, secure and efficient financial future. | bird_march |
1,922,992 | З | A post by Andrey Vizir | 0 | 2024-07-14T09:18:13 | https://dev.to/andrey_vi_1c62a8146a73/z-44bl | andrey_vi_1c62a8146a73 | ||
1,917,564 | How to Identify and Mitigate Flaky Tests: Best Practices and Strategies. | Enhancing Test Reliability and Efficiency in CI/CD Pipelines A flaky test is a test that sometimes... | 0 | 2024-07-09T15:58:35 | https://medium.com/mindroast/how-to-identify-and-mitigate-flaky-tests-best-practices-and-strategies-99e77f8d712e | javascript, webdev, programming, coding | _Enhancing Test Reliability and Efficiency in CI/CD Pipelines_
A flaky test is a test that sometimes passes and sometimes fails without any changes to the code being tested. These tests can be particularly troublesome because they undermine the reliability of the test suite.
Consider your CI/CD pipeline is configured such that only after the build is passed, only if your code passes a set of predefined test cases.
In an ideal situation, you must have set the priority for each test case and assume the latest code base to pass at least some percentage of cases.
But due to the flaky test cases, which keep on failing, as they might be stale or the use case is changed your test case fails and merging the pull request becomes a nightmare. Instead of reducing the percentage of passing cases, we should consider revamping those test cases.
## Reason for understanding Flaky Test.
1. **Unpredictable Test Results**: Flaky tests cause unpredictability by sometimes passing and other times failing, even though the code hasn’t changed. This randomness can make it difficult to trust test outcomes.
2. **Complex Debugging**: Tracking down the root cause of a flaky test can be challenging because the issue may not reproduce consistently, making it hard to identify and fix.
3. **Wasted Time and Resources**: Developers can spend a significant amount of time rerunning tests, investigating false positives, and debugging issues that aren’t actually related to the code’s functionality.
4. **Impact on Continuous Integration (CI)**: Flaky tests can disrupt continuous integration pipelines, leading to unnecessary build failures and reducing the overall efficiency of automated testing processes.
5. **False Confidence or Distrust**: Flaky tests can either create false confidence when they pass sporadically or cause distrust in the test suite when they fail unpredictably, making it harder to rely on test results.
## Ways to mitigate Flaky test cases.
1. **Best Practices to Mitigate**: To reduce flaky tests, developers can mock external dependencies, use deterministic data, ensure tests are isolated, and avoid relying on timing or order of execution.
2. **Automated Detection**: Implementing automated tools that detect flaky tests by running tests multiple times and comparing results can help identify and address flakiness early in the development cycle.
3. **Test Isolation**: Ensuring that each test runs in complete isolation, without relying on shared states or external factors, can significantly reduce the chances of flakiness.
4. **Regular Maintenance**: Regularly reviewing and refactoring the test suite to remove or fix flaky tests helps maintain the integrity and reliability of the testing process over time.
## Different strategies and tools to mitigate flaky test cases
1. **Jenkins, CircleCI, Travis CI**: Continuous Integration/Continuous Deployment (CI/CD) tools like these can be configured to rerun tests that fail, helping to identify flaky tests. They often have plugins or built-in support for handling flaky tests.
2. **Docker**: Companies use Docker to create isolated environments for running tests. This ensures that tests have a consistent and clean environment each time they are executed, reducing flakiness caused by environmental differences.
3. **Virtual Machines (VMs)**: Similar to Docker, VMs can be used to ensure tests run in a controlled and isolated environment, minimizing interference from other processes or dependencies.
4. **Statistical Analysis using Machine Learning**: Some advanced systems use machine learning to analyze test results and identify patterns indicative of flaky tests. This can help in proactively identifying and addressing flakiness.
5. **Code Review Policies and Version Control Hooks**: Implementing strict code review policies that include checks for potential sources of flakiness can prevent flaky tests from being introduced.
Using pre-commit hooks or other version control mechanisms to run tests in a controlled manner before changes are merged can catch flaky tests early.
## Strategies by some of the big organisations
1. **Google**:
* **Rerun Failed Tests**: Google has a policy where they rerun tests that fail to determine if the failure is consistent. This helps identify flaky tests. They also have internal tools and infrastructure to manage and mitigate flakiness across their extensive test suites.
* **Test Isolation**: Google emphasizes the importance of test isolation to ensure that tests do not interfere with each other, which is critical in reducing flakiness.
2. **Microsoft**:
* **Test Analytics and Reporting**: Microsoft uses detailed test analytics and reporting tools to track flaky tests. By analyzing test results over time, they can identify patterns and pinpoint flaky tests.
* **Quarantining Flaky Tests**: Microsoft sometimes quarantines flaky tests, separating them from the main test suite until they are fixed to prevent them from affecting the overall test results.
**3. Facebook**:
* **Detox**: Facebook developed an open-source library called Detox to test their mobile apps. Detox ensures that tests are run in a consistent state and environment, reducing flakiness caused by asynchronous operations and other timing issues.
* **Continuous Testing**: Facebook integrates continuous testing into their development process, using tools to automatically rerun tests and identify flaky behavior early in the development cycle.
**4. Netflix**:
* **Chaos Engineering**: Netflix employs chaos engineering practices to test the resilience of their systems. By intentionally introducing failures and disruptions, they can identify flaky tests and improve the robustness of their tests and systems.
* **Automated Retrying**: Netflix uses automated retry mechanisms within their CI/CD pipelines to rerun tests that fail intermittently, helping to identify and manage flaky tests.
**5. LinkedIn**:
* **Flaky Test Management Tools**: LinkedIn has developed tools specifically for managing flaky tests. These tools help track flaky tests, provide visibility into their occurrence, and prioritize their resolution.
* **Test Environment Standardization**: LinkedIn focuses on standardizing test environments to reduce variability and ensure that tests run under consistent conditions, which helps mitigate flakiness.
## About The Author
Apoorv Tomar is a software developer and blogs at [**Mindroast](https://mindroast.com/)**. You can connect on [social networks](https://www.mindroast.com/social). Subscribe to the [**newsletter](https://www.mindroast.com/newsletter)** for the latest curated content.
| apoorvtomar |
1,917,565 | screw house | https://maps.google.com/maps?cid=8838499379340141534 | 0 | 2024-07-09T15:58:37 | https://dev.to/screwhouse/screw-house-55ik | [https://maps.google.com/maps?cid=8838499379340141534](https://maps.google.com/maps?cid=8838499379340141534) | screwhouse | |
1,917,566 | screw house | https://drive.google.com/drive/folders/1wtbVn6qv3Zoj3oi1cDl_b7fd8nJPuXi5?usp=sharing | 0 | 2024-07-09T15:59:02 | https://dev.to/screwhouse/screw-house-2jpb | [https://drive.google.com/drive/folders/1wtbVn6qv3Zoj3oi1cDl_b7fd8nJPuXi5?usp=sharing](https://drive.google.com/drive/folders/1wtbVn6qv3Zoj3oi1cDl_b7fd8nJPuXi5?usp=sharing) | screwhouse | |
1,917,567 | Win2 Link Alternatif | Temukan pengalaman bermain yang lancar dengan Win2Asia melalui link alternatif terbaru. Kami memahami... | 0 | 2024-07-09T15:59:17 | https://dev.to/win2asia/win2-link-alternatif-2bco | win2, win2link, alternatifwin2, win2alternatif | Temukan pengalaman bermain yang lancar dengan Win2Asia melalui link alternatif terbaru. Kami memahami pentingnya akses yang stabil dan bebas hambatan bagi para pemain. Oleh karena itu, kami menyediakan link alternatif yang selalu diperbarui untuk memastikan Anda dapat menikmati permainan favorit Anda tanpa gangguan. Klik [link alternatif Win2Asia](https://s.id/win2-asia) sekarang dan nikmati layanan hiburan online terdepan di Asia!
## Keunggulan Link Alternatif Win2Asia:
Akses Cepat dan Stabil: Tidak ada lagi kendala akses. Link alternatif kami memastikan Anda dapat masuk dengan cepat dan lancar.
Keamanan Terjamin: Semua link alternatif dilengkapi dengan sistem keamanan tingkat tinggi untuk melindungi data dan privasi Anda.
Update Berkala: Kami selalu memperbarui link alternatif untuk menghindari pemblokiran dan menjaga kenyamanan bermain Anda.
Kunjungi link alternatif Win2Asia dan mulai petualangan bermain Anda tanpa batas! | win2asia |
1,917,569 | 3D Riemann Surface | Check out this Pen I made! | 0 | 2024-07-09T16:00:47 | https://dev.to/dan52242644dan/3d-riemann-surface-5c4k | codepen, javascript, html, programming | Check out this Pen I made!
{% codepen https://codepen.io/Dancodepen-io/pen/abgzbjZ %} | dan52242644dan |
1,917,570 | Algorithmic Trading: The Future of Finance | In today's fast-paced world of finance, innovation is the driving force that continues to shape the... | 27,673 | 2024-07-09T16:05:12 | https://dev.to/rapidinnovation/algorithmic-trading-the-future-of-finance-66b | In today's fast-paced world of finance, innovation is the driving force that
continues to shape the industry's future. Technology is advancing at an
unprecedented pace, and entrepreneurs and innovators are presented with a wide
array of tools to redefine traditional financial practices. One such
revolutionary technology is algorithmic trading, also known as algo-trading,
which leverages the power of artificial intelligence (AI) and machine learning
(ML).
## The Rise of AI in Algorithmic Trading
AI has left an indelible mark on countless industries, and finance is no
exception. AI algorithms can analyze vast amounts of data, identify patterns,
and make predictions at speeds once unimaginable. In algorithmic trading, AI
processes news feeds, market data, and social media sentiment to predict
market trends and execute trades automatically.
## Machine Learning: Adapting to the Market
Machine learning, a subset of AI, enhances algorithmic trading by allowing
systems to learn from historical data and adapt to changing market conditions.
ML algorithms recognize patterns and develop trading strategies based on past
market behavior, continuously refining their models for better decision-
making.
## Real-World Applications of Algorithmic Trading
High-frequency trading (HFT) and quantitative trading are notable applications
of algo-trading. HFT relies on AI and ML to execute trades in microseconds,
increasing market liquidity and reducing bid-ask spreads. Quantitative trading
uses algorithms to identify and capitalize on statistical arbitrage
opportunities by analyzing historical data and market conditions.
## Challenges and Potential Solutions
Despite its potential, algorithmic trading faces challenges such as model
reliability and data security. Ensuring the accuracy and robustness of AI and
ML models is crucial to avoid financial losses. Implementing robust
cybersecurity measures and adhering to data protection protocols can mitigate
risks and ensure data security.
## Emerging Trends in Algorithmic Trading
Emerging trends include Explainable AI (XAI) for transparency, quantum
computing for solving complex financial problems, alternative data sources for
unique market insights, and decentralized finance (DeFi) platforms for
automated trading without intermediaries.
## Ethical Considerations in Algorithmic Trading
Ethical considerations include preventing market manipulation, ensuring
fairness, maintaining transparency, and adhering to regulatory compliance.
These measures are essential to build trust and maintain the integrity of
financial markets.
## The Future of Algorithmic Trading
Looking ahead, algo-trading is poised to advance further with technologies
like Dall-e 2, which generates images from textual descriptions, and
personalized investment recommendations. By leveraging AI and ML, the
financial world can become more accessible and efficient.
## Embrace Rapid Innovation for a Better Future
Algorithmic trading, fueled by AI and ML, represents rapid innovation in
finance. By addressing challenges, ensuring data security, and maintaining
ethical standards, we can create a more inclusive and sustainable financial
ecosystem. Stay informed about the latest developments to harness the full
potential of this powerful fusion of finance and technology.
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## URLs
* <https://www.rapidinnovation.io/post/algorithmic-trading-leveraging-ai-and-ml-in-finance>
## Hashtags
#FinTechInnovation
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#MachineLearning
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| rapidinnovation | |
1,917,573 | Transforming Spaces with White Cube: Our Journey in Interior Design and Construction | Hello, Dev Community! At White Cube, we specialize in creating stunning interior designs and... | 0 | 2024-07-09T16:08:40 | https://dev.to/yerba_white_1c8c69f3a281f/transforming-spaces-with-white-cube-our-journey-in-interior-design-and-construction-fj9 | Hello, Dev Community!
At White Cube, we specialize in creating stunning interior designs and delivering exceptional construction projects. However, as the digital world evolves, we recognized the need to enhance our online presence to better serve our clients. Today, I want to share our journey of revamping the White Cube website (https://white-cube.kz/) using modern web technologies.
The Challenge
Our original website was functional but lacked the sleek, user-friendly interface we wanted to offer our visitors. We needed a site that not only showcased our portfolio but also provided an intuitive experience for potential clients looking for design and construction services.
Technology Stack
We decided to rebuild our website using the following technologies:
React.js: For a dynamic and responsive user interface.
Node.js: To handle server-side logic and API requests.
Express.js: For efficient and scalable backend development.
MongoDB: As our database solution to manage content and user data.
Bootstrap: To ensure a mobile-first, responsive design.
Key Features
1. Interactive Portfolio
Our portfolio is the heart of our website. Using React.js, we created an interactive gallery where users can filter projects by type (residential, commercial) and view high-quality images and details of each project.
2. Seamless Navigation
We implemented a single-page application (SPA) architecture to provide smooth and fast navigation. Users can move between sections without page reloads, enhancing the overall user experience.
3. Contact and Inquiry Forms
To streamline communication, we developed custom forms that allow users to easily request consultations or ask questions. The form data is managed through MongoDB and handled by our Node.js backend, ensuring reliable and secure data processing.
4. Real-Time Updates
Using WebSockets, we added real-time updates for our blog and news sections. This keeps our clients informed about the latest projects, trends, and company news without needing to refresh the page.
The Development Process
Planning and Design: We started with wireframes and prototypes, focusing on user experience and responsive design.
Frontend Development: Leveraging React.js, we built reusable components for a consistent look and feel across the site.
Backend Development: Using Node.js and Express.js, we created robust APIs to handle data requests and user interactions.
Database Integration: MongoDB provided a flexible and scalable solution for managing our content and user data.
Testing and Deployment: Rigorous testing ensured that our site was bug-free and performant before going live.
Challenges and Solutions
Performance Optimization: Ensuring the site loads quickly was crucial. We implemented lazy loading for images and code-splitting in React to improve performance.
Security: Protecting user data was a top priority. We implemented HTTPS, used secure authentication methods, and followed best practices for data handling.
SEO: To improve search engine visibility, we added server-side rendering (SSR) with Next.js, ensuring our dynamic content is easily indexable.
Conclusion
Revamping the White Cube website has been a rewarding experience. We've successfully created a modern, user-friendly platform that not only showcases our work but also provides a seamless experience for our clients. Visit White Cube to see the results of our efforts.
We hope our journey inspires other developers and businesses to embrace modern web technologies and continuously strive for excellence in user experience. Thank you for reading, and we look forward to your feedback and questions! | yerba_white_1c8c69f3a281f | |
1,917,575 | Lists, Stacks, Queues, and Priority Queues | Choosing the best data structures and algorithms for a particular task is one of the keys to... | 0 | 2024-07-09T16:14:09 | https://dev.to/paulike/lists-stacks-queues-and-priority-queues-18ic | java, programming, learning, beginners | Choosing the best data structures and algorithms for a particular task is one of the keys to developing high-performance software. A data structure is a collection of data organized in some fashion. The structure not only
stores data but also supports operations for accessing and manipulating the data.
In object-oriented thinking, a data structure, also known as a _container_ or _container object_, is an object that stores other objects, referred to as data or elements. To define a data structure is essentially to define a class. The class for a data structure should use data fields to store data and provide methods to support such operations as search, insertion, and deletion. To create a data structure is therefore to create an instance from the class. You can then apply the methods on the instance to manipulate the data structure, such as inserting an element into or deleting an element from the data structure.
[This Section](https://dev.to/paulike/the-arraylist-class-abb) introduced the **ArrayList** class, which is a data structure to store elements in a list. Java provides several more data structures that can be used to organize and manipulate data efficiently. These are commonly known as _Java Collections Framework_. | paulike |
1,917,579 | Otolaryngologist | https://maps.google.com/maps?cid=4261584476696406095 | 0 | 2024-07-09T16:19:59 | https://dev.to/otolaryngologist/otolaryngologist-1jln | [https://maps.google.com/maps?cid=4261584476696406095](https://maps.google.com/maps?cid=4261584476696406095) | otolaryngologist | |
1,917,593 | Otolaryngologist | https://drive.google.com/drive/folders/1Jwk9GPJu8tEq2iLaORSCylfxxqdtmkj-?usp=sharing | 0 | 2024-07-09T16:20:29 | https://dev.to/otolaryngologist/otolaryngologist-327a | [https://drive.google.com/drive/folders/1Jwk9GPJu8tEq2iLaORSCylfxxqdtmkj-?usp=sharing](https://drive.google.com/drive/folders/1Jwk9GPJu8tEq2iLaORSCylfxxqdtmkj-?usp=sharing) | otolaryngologist | |
1,917,594 | Exploring the Impact of DefiLlama in Shaping the Landscape of Decentralized Finance | As the modern digital sphere continues to evolve, the advantages of a particular platform in this... | 0 | 2024-07-09T16:23:02 | https://dev.to/cryptonews/exploring-the-impact-of-defillama-in-shaping-the-landscape-of-decentralized-finance-1pmj | cryptocurrency, bitcoin, ethereum | As the modern digital sphere continues to evolve, the advantages of a particular platform in this rapidly changing economy become increasingly important. One such platform, known synonymously as [DefiLlama](https://defillama.co/), has solidified its niche within the landscape of Dispersed Financial systems. This innovative and rapidly growing entity is making significant strides in transforming and reshaping the digital economy as well as the larger financial ecosystem.
In an era where financial autonomy, security, and transparency hold paramount importance, distributed monetary administrations have emerged as a rebellious force in the traditionally centralized financial world. Among these novel tools em>DefiLlamaem> shines as it takes prominence in this brave new economy.
The purpose of this section is to shed light on the workings of this entity, delineate its uniquely designed offerings, and elucidate its indelible impact on the realm of Distributed Trade practices by leveraging the sanctions of blockchain technology.
Why Opt for Using NeoFinance's DApp Monitor?
In a world that's swiftly gravitating towards a digital renaissance, few tools embody this shift better than NeoFinance's brand-new DApp Monitor. This innovative resource, boasting significant advantages, is your trusted companion in defragmented fiscal environments. Throughout this section, we'll delve deep into the benefits it offers.
Superior Transparency: Operating in a digital financial ecosystem demands visibility. With NeoFinance's DApp Monitor, users experience unparalleled transparency - a noteworthy feature that's often unmet in the crypto world. Stay ahead of the curve, monitor effectively, and make informed fiscal decisions.
Enhanced Security: Barely a day passes without reports of hacking or theft in the cyber financial ecosystem. With this in mind, our DApp Monitor brings on board remarkable vibrant security features, providing users not only peace of mind, but also the assurance of robust protection in all your digital transactions.
Seamlessness: The DApp Monitor promises an effortless user- interface, positioning it as an essential tool in the digital financial Maven's toolkit. Its simple, intuitive design means minimal learning curves - allowing individuals to focus more on their fiscal goals, and less on maneuvering through complicated platforms.
Scalability: As we forge ahead in the 21st century, flexibility and scalability are critical. NeoFinance's DApp Monitor offers an adaptive solution that grows with your needs. With its versatile capacity, it meets the ever-evolving demands of a digital finance enthusiast.
All these benefits and more position our DApp Monitor as a comprehensive solution for navigating the flux-ridden waters of digital economies. Stay tuned to reap the many benefits waiting under the hood!
Comprehensive Crypto Asset Tracking
In a digital world evolving at a rapid pace, managing and keeping an eye on crypto assets with precision is crucial. This section delves into the importance and ways of tracking crypto assets in a thorough and meticulous manner. It will provide insight to individuals and corporations who wish to stay updated with the movement of these digital assets in a flawless and efficient manner, without delving into specific terminologies.
Why is Crypto Asset Tracking Important?
Cryptocurrency, a digital alternative to traditional financial structures, has greatly influenced the global financial dynamics. As such, tracking these digital assets has become vital to protect and monitor investments in this fluctuating market. There are numerous reasons why thorough crypto asset tracking is pivotal:
Security: Keeping an eye closely on your digital assets helps in preventing fraudulent transactions.
Profit Maximization: With precise tracking, you can ensure selling or buying at optimal price points, maximizing profitability.
Regulatory Compliance: Many jurisdictions require reporting of digital asset holdings, requiring solid tracking systems.
Methods for Thorough Crypto Asset Tracking
There are numerous ways of keeping track of your digital assets, each with its own unique advantages:
Portfolio Applications: Mobile and web applications that help in tracking all your digital investments in one place.
API Integrations: Certain platforms offer API integrations to gather data from multiple sources for precise tracking.
Fiat Gateways: These are digital portals that help track the real-world value of your crypto assets.
Overall, tracking digital assets is an essential practice for anyone invested in digital currencies. It not only ensures protection of your digital assets but also aids in asset optimization and compliance with local jurisdictions.
Interactive and User-Friendly Platform
Creating a rewarding experience for our clientele is at the foundation of our digital framework. Simplicity and professionalism coexist to offer a highly customizable environment. This is not a mere utility, but an immersive hub where efficiency and user interactions merge harmoniously.
Our platform has been carefully crafted with the end user in mind. Its interactive layout guarantees easy navigation, regardless of your level of tech-savviness. Stripped from any unnecessary clutter, its sleek design makes every action feel seamless and intuitive.
Optimized to promote user-friendliness, this platform is more than a tool - it's a space where ease of use is paramount. Whether you're a seasoned financial expert or just starting in the digital landscape, you will appreciate how effortless controlling your assets feels.
Experience a platform that adapts to your demands. Never worry about complex interfaces again, as our system is built with guidelines that make it easily adaptable. From in-depth details to broad overviews, encounter a structure that molds to your specific needs.
Be ready to explore a digital landscape reimagined. With our interactive and user-friendly platform, your journey through the intricate world of digitized assets will be one of discovery and simplicity.
Updated Market Information
In our mission to continue providing accurate and relevant data, we are proud to feature our fresh segment focused on recent advancements and trends happening in the world of unfettered, web-based financial systems. This section presents an overview of refreshed intelligence from the marketplace. Stay tuned for hot-off-the-press details without having to navigate through the chaos of the internet.
Our dedicated team at [DefiLlama](https://defillama.co/) utilizes advanced analytical tools and techniques, as well as in-depth industry understanding, to dig deep into this diverse and global platform. For enthusiasts, pro traders, or curious beginners, every detail counts! Let's dive into recent findings:
Updated maps of token distribution across several platforms.
Newly minted digital assets making an entry into the markets.
Emerging players in the unregulated online financial plans.
Volatility index mapping potential risks and rewards.
Regulatory updates from world-wide jurisdictions.
Sustainable and green initiatives within non-centralized fiscal systems.
Furthermore, we understand the need for verified and non-partisan details, especially in the ever-changing environment of digital assets exchange. Thus, we maintain rigorous research domains:
Synchronized data gathering and analysis across multiple time zones.
Unbiased reports to reaffirm our commitment towards integrity.
Strategic collaborations with global partners to secure comprehensive details.
Regular follow-ups and progress tracking of promising cyberspace initiatives.
Don't let the vital insights slip away! Stay ahead of the curve with our unfettered market intelligence. Let DefiLlama be your guide in navigating the multifaceted world of digitized capital solutions.
Getting Started with Blockchain-based Financial Solutions
Embarking on your journey with DLT-based (Distributed Ledger Technology) economic frameworks can be both exciting and confusing. In this section, we talk about diving in and getting started. We promise to guide you through while keeping the jargon to a minimum.
Understanding the basic concept: DLT-based economic frameworks are essentially financial systems that operate on a blockchain platform. They are 'decentralized' because the financial processes and transactions don't rely on a central authority like a bank or government.
Familiarize with terminologies: Before stepping in, you need to familiarize yourself with common terms and phrases in use. These include decentralized exchanges (DEXs), lending platforms, yield farming, liquidity pools, and so on.
Steps to begin your journey
Doing research: The very first step is understanding what you're signing up for. Read articles, watch videos, take part in relevant forums and discussions to gain insight into the blockchain finance world.
Choosing the right platform: Be sure to choose a blockchain platform that provides transparency, security, and a high degree of control over your investments.
Creating an account: Once you've selected your platform, the next step is to create an account. Make sure to set a strong password and enable all security measures available.
Starting small: Lastly, start with a small investment. Monitor the performance closely and understand the trends before making any huge investments.
No matter the ups and downs, remember that patience, research, and understanding are key to holding a strong position in this new age economic model. All the best for your DLT-based financial solutions journey!
How to Navigate the World of Alternative Economic Structures
As we delve into this section, we shall explore the navigation of this platform, sans the specific definitions for now. As vibrant as it may seem, maneuvering through the platform can be quite perplexing, especially to novices in the crypto space. Hence, we shall attempt to demystify the process, making it easier to put the platform to good use.
To begin with, the home interface of the platform is designed for user convenience. It provides a broad view of the liquidity and the yield farms. However, it’s from the side menu that you can access the platform's other features.
Menu Option Description
Home This is the dashboard that gives you an overview of your entire transactions and more.
Pools This option gives you access to detailed information about every active pool.
Yield Farms This is where you can engage in yield farming, an online investment strategy.
Market This section is for checking prevailing rates and news of assets under management.
Explore This option allows you to explore different assets and make your choice.
The platform also features a search bar at the top of the page that can be used to search for specific pools, farms, or markets. Navigation without difficulty in the realm of digital asset control is a necessary skill. With a good understanding of the aforementioned, you'll be able to make the most of this platform. | cryptonews |
1,917,596 | TypeID-JS: Type Safe, K-Sortable Unique IDs for Javascript | Since we first announced TypeID last year, we've seen significant adoption and interest from the... | 28,009 | 2024-07-09T16:29:27 | https://www.jetify.com/blog/typeid-js-v1/ | javascript, typescript, webdev | Since we first announced [TypeID](https://github.com/jetify-com/typeid) last year, we've seen significant adoption and interest from the community, with 23 different language clients contributed by the community and 90,000 weekly NPM downloads of our Typescript Implementation.
Last week, we released version 1.0 of our Typescript implementation, [TypeID-JS](https://github.com/jetify-com/typeid-js). To celebrate this release, we wanted to share more about why we wrote TypeID, and how we use it to ensure type safety at Jetify.
## Type Safety and Unique Identifiers
We developed the idea for TypeID while building [Jetify Cloud](https://www.jetify.com/cloud), our solution for deploying and managing [Devbox](https://www.jetify.com/devbox) or Docker based projects across your team. Jetify Cloud's architecture has many different entities we need to manage: Orgs, Users, Deployments, Secrets, and Projects, all of which require unique identifiers to distinguish them.
Originally, we started by following best practices and assigning a UUID to each instance of an entity. Still, we quickly ran into a problem: UUIDv7 lacks type safety! Take the code below as an example:
```tsx
export const getMember = async (
memberId: UUID,
orgId: UUID,
) => {
const { member, organization } =
await authClient.organizations.members.get({
organization_id: orgId,
member_id: memberId,
});
return { member, organization };
};
```
This function uses two UUIDs to look up a member and organization. However, the function cannot ensure that `memberID` and `orgID` represent the correct entity! If a developer accidentally uses a `memberID` where we were expecting an `orgID`, we would only discover the issue at runtime.
As we were looking for solutions to this problem, we encountered Stripe's [Object ID](https://dev.to/stripe/designing-apis-for-humans-object-ids-3o5a), which encodes type information into IDs using a prefix. This seemed like a great solution, but unfortunately, we couldn't find a well-defined standard for consistently implementing typed IDs across multiple languages.
## TypeID: K-sortable, type-safe, globally unique identifiers
[TypeID](http://www.github.com/jetify-com/typeid) is our attempt to create such a consistent standard. TypeID is a type-safe, K-sortable, globally unique identifier inspired by Stripe's prefixed types. TypeID also provides a consistent standard for other languages to implement their clients and libraries.
TypeIDs encode unique identifiers as a lowercase string with three parts:
1. A prefix that represents the ID’s type (63 chars, lowercase ASCII letters)
2. An underscore (`_`) separator
3. A 128-bit UUIDv7 encoded as a 26-character string using a modified base32 encoding.
```tsx
user_2x4y6z8a0b1c2d3e4f5g6h7j8k
└──┘ └────────────────────────┘
type uuid suffix (base32)
```
With this format, a TypeID-compatible client can encode and decode type information into your IDs and then run checks at a build or compile time to ensure you are using the right ID. For example, if we wanted to create a random TypeID for a user entity, we could do something like this:
With TypeID, we can also add type checks to our functions and catch errors at runtime. Rewriting the example above, we can now be sure that developers will use the proper IDs in the right place:
```tsx
import { TypeID } from 'typeid-js';
export const getMember = async (
memberId: TypeID<'member'>,
orgId: TypeID<'org'>,
) => {
...
}
```
In addition to type safety, this format has a few properties that make it friendly for developers to use:
1. **UUIDv7 compatible:** You can easily [convert](https://www.jetify.com/typeid) a TypeID into a UUID by removing the prefix and decoding the suffix.
2. **K-sortable:** You can use a TypeID as a sortable primary key in your database with good locality.
3. **URL safe:** We use TypeIDs in our URLs to make them easy to copy, paste, and share. Including TypeIDs in the URL makes simplifies generating page state.
4. **Easily selectable:** You can copy and paste it by double-clicking (Try it!)
## New Features in TypeID-JS v1.0
Today, we're announcing version 1.0 of our TypeID-JS library. This update adds several new features to improve usability and type safety, including:
1. **Unboxed, function-based, streamable TypeIDs**: This makes it possible to serialize TypeIDs without casting them to strings and lets you use TypeIDs as keys in Maps and Sets.
2. **Stricter Type and Runtime checking:** TypeID now throws an error if you attempt to parse an empty string or a typeid with the wrong prefix.
3. **Compatibility with TypeID spec v3:** JS TypeIDs can now use underscores in the prefix. For example: `pro_subscription_2x4y6z8a0b1c2d3e4f5g6h7j8k` is a valid TypeID with prefix `pro_subscription`.
## How to Use TypeID with your project
You can add TypeID to your JS project using your NodeJS package manager of choice. Not using JS? TypeID has 26 different implementations, ranging from Go to OCaml to SQL. If you’re interested in writing your own implementation of TypeID, you can check our our [formal specification](https://github.com/jetify-com/typeid/tree/main/spec).
## Looking to Power-Up your Development Team?
Our team at Jetify builds powerful developer tools. Simplify your deployments and projects with [Jetify Cloud](https://www.jetify.com/cloud), or automate onboarding + dev environments with [Devbox](https://www.jetify.com/devbox). You can follow us on [Twitter](https://twitter.com/jetify_com), or chat with our developers live on our [Discord Server](https://discord.gg/jetify). We also welcome issues and pull requests on our [Github Repo](https://github.com/jetify-com/devbox). | lagoja |
1,917,597 | Cloud Native Live: Automate pinning GitHub Actions and container images to their digests | GitHub Actions, like open source dependencies, are vulnerable to malicious attacks. Pinning GitHub... | 0 | 2024-07-09T16:30:07 | https://dev.to/stacklok/cloud-native-live-automate-pinning-github-actions-and-container-images-to-their-digests-1jce | githubactions, security, cloudnative, github | GitHub Actions, like open source dependencies, are vulnerable to malicious attacks. Pinning GitHub Actions to their digests (instead of using floating tags) is recommended by GitHub: it’s the only way to use an Action as an immutable release, so that you’re always using a known-good version even if the source repo is compromised. Likewise, for containers, the digest is a unique identifier for the content of an image. Once an image is built, its digest will always refer to that specific build, ensuring immutability and consistency.
Only 2% of public GitHub repos pin actions to digests today, probably because it’s a tedious process. But there are now ways to automate this!
Join [Stacklok](https://stacklok.com) Engineers [Juan Antonio "Ozz" Osario](https://github.com/JAORMX) & [Jakub Hrozek](https://github.com/jhrozek) for this [CNCF Livestream](https://community.cncf.io/events/details/cncf-cncf-online-programs-presents-cloud-native-live-automate-pinning-github-actions-and-container-images-to-their-digests/) as they explore some free and open source tools you can use to automate pinning container images and Actions by their digests and demo how they work.
**July 17, 2024**
9am PT / 12pm ET / 16:00 UTC
- [Watch live on CNCF YouTube](https://www.youtube.com/watch?v=jHW2x-8LruE)
- [Watch live on CNCF Twitch](https://www.twitch.tv/cloudnativefdn)
- [Watch live on LinkedIn]() | stacey_potter_3de75e600a1 |
1,917,600 | 8 Exciting New JavaScript Concepts You Need to Know | As a developer, staying up-to-date with the latest advancements in JavaScript is crucial to writing... | 0 | 2024-07-09T16:32:50 | https://dev.to/dipakahirav/8-exciting-new-javascript-concepts-you-need-to-know-45hp | javascript, webdev, beginners, learning | As a developer, staying up-to-date with the latest advancements in JavaScript is crucial to writing efficient, modern, and scalable code. In this post, we'll explore 8 new and exciting JavaScript concepts that you should know to take your coding skills to the next level.
please subscribe to my [YouTube channel](https://www.youtube.com/@DevDivewithDipak?sub_confirmation=1
) to support my channel and get more web development tutorials.
**1. Optional Chaining (?.)**
Introduced in ECMAScript 2020, optional chaining allows you to read the value of a property located deep within a chain of connected objects without having to check that each reference in the chain is valid.
```javascript
let name = person?.address?.street?.name;
```
**2. Nullish Coalescing (??)**
Also introduced in ECMAScript 2020, the nullish coalescing operator returns the first operand if it's not null or undefined, and the second operand otherwise.
```javascript
let name = person?.name?? 'Unknown';
```
**3. BigInt**
A new numeric primitive in JavaScript, BigInt is used to represent integers with arbitrary precision, allowing for accurate calculations with large integers.
```javascript
const x = 12345678901234567890n;
```
**4. globalThis**
A new global object, globalThis, provides a way to access the global object in a way that's compatible with modern JavaScript environments.
```javascript
console.log(globalThis === window); // true in a browser
```
**5. matchAll()**
A new method on the String prototype, matchAll() returns an iterator that yields matches of a regular expression against a string, including capturing groups.
```javascript
const regex = /(\w)(\d)/g;
const str = 'a1b2c3';
for (const match of str.matchAll(regex)) {
console.log(match);
}
```
**6. Promise.allSettled()**
A new method on the Promise API, allSettled() returns a promise that is resolved when all of the promises in an array are either resolved or rejected.
```javascript
const promises = [Promise.resolve('a'), Promise.reject('b'), Promise.resolve('c')];
Promise.allSettled(promises).then((results) => console.log(results));
```
**7. String.prototype.at()**
A new method on the String prototype, at() returns the character at the specified index, allowing for negative indices to access characters from the end of the string.
```javascript
const str = 'hello';
console.log(str.at(0)); // 'h'
console.log(str.at(-1)); // 'o'
```
**8. Error Cause**
A new property on Error objects, cause allows you to specify the underlying cause of an error.
```javascript
try {
throw new Error('Error occurred', { cause: new Error('Underlying cause') });
} catch (error) {
console.log(error.cause);
}
```
Feel free to leave your comments or questions below. If you found this guide helpful, please share it with your peers and follow me for more web development tutorials. Happy coding!
### Follow and Subscribe:
- **Website**: [Dipak Ahirav] (https://www.dipakahirav.com)
- **Email**: dipaksahirav@gmail.com
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)
- **LinkedIn**: [Dipak Ahirav](https://www.linkedin.com/in/dipak-ahirav-606bba128) | dipakahirav |
1,917,602 | பைத்தான் (Python) - 1ம் நாள் | Python என்பது மக்கள் எளிதில் கற்றுக்கொள்ள கூடிய நிரலாக்க மொழி. இந்நிரலாக்க மொழியை பீலோ கீடோ (Guido... | 0 | 2024-07-10T09:56:42 | https://dev.to/fathima_shaila/paittaannn-python-1m-naall-4h5l |
Python என்பது மக்கள் எளிதில் கற்றுக்கொள்ள கூடிய நிரலாக்க மொழி. இந்நிரலாக்க மொழியை பீலோ கீடோ (Guido van Rossum) என்பவர் 1980 ஆம் ஆண்டுகளில் வடிவமைக்கத் தொடங்கி 1991 ஆம் ஆண்டளவில் வெளியிட்டார். எளிமையான இந்நிரலாக்க மொழி விரைவாக மக்களிடையே பிரபல்யமடையத் துவங்கியது.
<h3>python பயன்படுத்தப்படும் துறைகள்</h3>
* இயந்திரக் கற்றல் (Machine Learning)
* தரவுப் பகுப்பாய்வு (Data Analysis)
* வலை உருவாக்கம் (Web Development)
* செயற்கை நுண்ணறிவு (Artificial Intelligence)
* தகவல் பாதுகாப்பு (Cybersecurity)
* விளையாட்டுகளை வடிவமைத்தல் (Games Development)
* விஞ்ஞான காட்சிப்படுத்தல் (Scientific Visualization)
* நிரலாக்கக் கல்வி (Programming Education)
Python மொழி linux OS இல் நிறுவப்பட்டு இருக்கும் windows OS இல் python வலைத்தளத்திற்கு சென்று நாம் நிறுவ வேண்டும்.
Python கற்கத் தொடங்குவோம்.
print() கட்டளை என்பது திரைக்கு அல்லது பிற காட்சிப்படுத்தும் சாதனத்திற்கு செய்தியை அனுப்புவதற்கான எளிய வழியாகும்.
print ("Hello World")
>>>Hello World
என்று திரையில் காட்சிப்படுத்தப்படும்.
**1. String & Variables**
name = "hiba"
print(name)
>>>hiba
இதில் name என்பது variable ஆகும்
variables ஐ தரவுகளை சேமிக்க பயன்படுத்துகிறோம்.
"hiba" என்பது string. இரட்டை அல்லது தனி மேற்கோள் குறிகளுக்குள் string எழுதப்படும்.
Variables ஐ அச்சிட print()ஐ பயன்படுத்தலாம்.
இந்த codeஐ பயன்படுத்தி, variables இல் சேமித்த தரவுகளை அச்சிடலாம்.
**2. Printing Multiple items**
Pythonல் பல தகவல்களை அச்சிடும் போது அவற்றை காற்புள்ளிகளால் (commas) பிரிக்கலாம். Python ஒவ்வொரு தகவல்களுக்கும் இடையில் ஒரு இடைவெளியை (space) சேர்க்கும்.
name = 'Hiba'
age = 2
country = "Srilanka"
print("Name : ", name , "Age :" , age , "Country :", country )
>>>Name : Hiba Age : 2 Country : Srilanka
**3. Formatted Strings with f-strings**
f-string என்பது stringகளை format செய்யும் வழி. string-ஐ f என்ற எழுத்தால் prefix செய்து variable ஐ இரட்டை அடைப்பு குறிகளில் {} எழுத வேண்டும்.
name = "Hiba"
age = "2"
country = "Sri Lanka"
print(f"My name is {name}, I am {age} years old, My Country is {country}")
>>>My name is Hiba, I am 2 years old, My Country is Sri Lanka
**4. Concatenation of Strings**
கூட்டல் குறியீட்டைப்(+) பயன்படுத்தி stringகளை இணைக்க முடியும்.
greeting = "Good Morning"
name = "Hiba"
print(greeting +" "+ name , end="!")
>>>Good Morning Hiba!
இங்கு ,end=" " விளைவின் இறுதியில் நமக்கு தேவையான குறியீடுகளை அல்லது வேறு தகவல்களை சேர்க்க முடியும்.
அதுபோல் இரு stringஐ வேறாக்க sep="" (separator) ஐ பயன்படுத்தலாம்
**எ+கா**
greeting = "Good Morning"
name = "Hiba"
print(greeting, name, sep=" ", end="!")
>>>Good Morning Hiba!
**5. Using escape sequences**
புதிய வரிகளில் ஆரம்பிக்க \n ஐ பயன்படுத்தலாம்
greeting = "Good Morning"
name = "Hiba"
print(greeting, name, sep="/n", end="!")
>>>Good Morning
Hiba!
print("Hello\nWorld\nGood morning")
>>>Hello
World
Good morning
அல்லது
print("""Hello
World
Good morning""")
>>>Hello
World
Good morning
இவ்வாறும் பயன்படுத்தலாம்.
**\b** (Back space)
print("Hello\bWorld")
>>>HelloWorld
**\t** (Tab)
a = "Hello\tWorld"
print(a)
>>>Hello World
**6. Printing Quotes Inside Strings**
Stringகளுக்கு கட்டாயமாக இரட்டை or ஒற்றை மேற்கோள் குறிகள் இட வேண்டும். Stringகளுக்கு இடையில் இரட்டை மேற்கோள் குறிகள் தேவைப்படின்,
print("She Said 'Hello World' ")
>>>She Said 'Hello World'
அல்லது
print('It\'s me Hiba')
>>>It's me Hiba
**7. Raw Strings to Ignore Escape Sequences**
கணனியில் fileகளின் இடங்களை குறிக்க r ஐ prefix செய்து பயன்படுத்தலாம். இது escape sequence இல் இடம் பெறாது.
print(r"C:\Users\Hiba\Documents\file.txt")
>>>C:\Users\Hiba\Documents\file.txt
| fathima_shaila | |
1,917,603 | Collections | The Collection interface defines the common operations for lists, vectors, stacks, queues, priority... | 0 | 2024-07-09T16:39:56 | https://dev.to/paulike/collections-3le7 | java, programming, learning, beginners | The **Collection** interface defines the common operations for lists, vectors, stacks, queues, priority queues, and sets.
The Java Collections Framework supports two types of containers:
- One for storing a collection of elements is simply called a _collection_.
- The other, for storing key/value pairs, is called a _map_.
Maps are efficient data structures for quickly searching an element using a key. Here are the following collections.
- **Set**s store a group of nonduplicate elements.
- **List**s store an ordered collection of elements.
- **Stack**s store objects that are processed in a last-in, first-out fashion.
- **Queue**s store objects that are processed in a first-in, first-out fashion.
- **PriorityQueue**s store objects that are processed in the order of their priorities.
The common features of these collections are defined in the interfaces, and implementations are provided in concrete classes, as shown in Figure below.
All the interfaces and classes defined in the Java Collections Framework are grouped in the **java.util** package.
The design of the Java Collections Framework is an excellent example of using interfaces, abstract classes, and concrete classes. The interfaces define the framework. The abstract classes provide partial implementation. The concrete classes implement the interfaces with concrete data structures. Providing an abstract class that partially implements an interface makes it convenient for the user to write the code. The user can simply define a concrete class that extends the abstract class rather implements all the methods in the interface. The abstract classes such as **AbstractCollection** are provided for convenience. For this reason, they are called convenience abstract classes.
The **Collection** interface is the root interface for manipulating a collection of objects. Its public methods are listed in Figure below. The **AbstractCollection** class provides partial implementation for the **Collection** interface. It implements all the methods in **Collection** except the **add**, **size**, and **iterator** methods. These are implemented in appropriate concrete subclasses.
The **Collection** interface provides the basic operations for adding and removing elements in a collection. The **add** method adds an element to the collection. The **addAll** method adds all the elements in the specified collection to this collection. The **remove** method removes an element from the collection. The **removeAll** method removes the elements from this collection that are present in the specified collection. The **retainAll** method retains the elements in this collection that are also present in the specified collection. All these methods return **boolean**. The return value is **true** if the collection is changed as a result of the method execution. The **clear()** method simply removes all the elements from the collection.
The methods **addAll**, **removeAll**, and **retainAll** are similar to the set union, difference, and intersection operations.
The **Collection** interface provides various query operations. The **size** method returns the number of elements in the collection. The **contains** method checks whether the collection contains the specified element. The **containsAll** method checks whether the collection contains all the elements in the specified collection. The **isEmpty** method returns **true** if the collection is empty.
The **Collection** interface provides the **toArray()** method, which returns an array representation for the collection.
Some of the methods in the **Collection** interface cannot be implemented in the concrete subclass. In this case, the method would throw **java.lang.UnsupportedOperationException**, a subclass of **RuntimeException**. This is a good design that you can use in your project. If a method has no meaning in the subclass, you can implement it as follows:
`public void someMethod() {
throw new UnsupportedOperationException
("Method not supported");
}`
The code below gives an example to use the methods defined in the **Collection** interface.
```
package demo;
import java.util.*;
public class TestCollection {
public static void main(String[] args) {
ArrayList<String> collection1 = new ArrayList<>();
collection1.add("New York");
collection1.add("Atlanta");
collection1.add("Dallas");
collection1.add("Madison");
System.out.println("A list of cities in collection1:");
System.out.println(collection1);
System.out.println("\nIs Dallas in collection1? " + collection1.contains("Dallas"));
collection1.remove("Dallas");
System.out.println("\n" + collection1.size() + " cities are in collection1 now");
Collection<String> collection2 = new ArrayList<>();
collection2.add("Seattle");
collection2.add("Portland");
collection2.add("Los Angeles");
collection2.add("Atlanta");
System.out.println("\nA list of cities in collection2:");
System.out.println(collection2);
ArrayList<String> c1 = (ArrayList<String>)(collection1.clone());
c1.addAll(collection2);
System.out.println("\nCities in collection1 or collection2: ");
System.out.println(c1);
c1 = (ArrayList<String>)(collection1.clone());
c1.retainAll(collection2);
System.out.print("\nCities in collection1 and collection2: ");
System.out.println(c1);
c1 = (ArrayList<String>)(collection1.clone());
c1.removeAll(collection2);
System.out.print("\nCities in collection1, but not in 2: ");
System.out.println(c1);
}
}
```
`A list of cities in collection1:
[New York, Atlanta, Dallas, Madison]
Is Dallas in collection1? true
3 cities are in collection1 now
A list of cities in collection2:
[Seattle, Portland, Los Angeles, Atlanta]
Cities in collection1 or collection2:
[New York, Atlanta, Madison, Seattle, Portland, Los Angeles, Atlanta]
Cities in collection1 and collection2: [Atlanta]
Cities in collection1, but not in 2: [New York, Madison]`
The program creates a concrete collection object using **ArrayList** (line 7), and invokes the **Collection** interface’s **contains** method (line 16), **remove** method (line 18), **size** method (line 19), **addAll** method (line 31), **retainAll** method (line 36), and **removeAll** method (line 41).
For this example, we use **ArrayList**. You can use any concrete class of **Collection** such as **HashSet**, **LinkedList**, **Vector**, and **Stack** to replace **ArrayList** to test these methods defined in the **Collection** interface.
The program creates a copy of an array list (lines 30, 35, 40). The purpose of this is to keep the original array list intact and use its copy to perform **addAll**, **retainAll**, and **removeAll** operations.
All the concrete classes in the Java Collections Framework implement the **java.lang.Cloneable** and **java.io.Serializable** interfaces except that **java.util.PriorityQueue** does not implement the **Cloneable** interface. Thus, all instances of **Cloneable** except priority queues can be cloned and all instances of **Cloneable** can be serialized. | paulike |
1,917,604 | Por quê eu estou aprendendo e acho que vocês também deveriam aprender scala em 2024 | Bom, para começar vou contextualizar vocês. Scala é uma linguagem de programação de proposito geral e... | 0 | 2024-07-09T16:39:56 | https://dev.to/brunociccarino/por-que-eu-estou-aprendendo-e-acho-que-voces-tambem-deveriam-aprender-scala-em-2024-25b1 | scala, learning, algorithms, functional | Bom, para começar vou contextualizar vocês. Scala é uma linguagem de programação de proposito geral e multi-paradigma, criada por Martin Odersky. Em scala todo valor é um objeto, e toda função é um valor.
Comecei a me interessar por scala quando eu vi pela primeira vez o projeto criado pelo twitter chamado cassovary que é uma biblioteca que facilita o processamento de grandes grafos. E também quando vi o repositório the algorithm que é uma coleção dos algoritmos de recomendação do twitter, primeiro eu pensei, por quê scala? Não sei se foi por isso que eles escolheram mas certamente é por isso que eu escolheria:
Como ja diz o nome scala (“scalable language.”) foi projetado para crescer com as demandas de seus usuários. Você pode usar Scala para uma ampla gama de tarefas, desde escrever pequenos scripts até construir grandes sistemas. Ela é executado na JVM (Java Virtual Machine) e suporta perfeitamente todas as bibliotecas Java. Scala também oferece recursos avançados para programação concorrente e paralela, como atores (via Akka) e ferramentas para programação funcional. Isso é crucial para o processamento eficiente de grandes volumes de dados. Scala também combina paradigmas de programação funcional e orientada a objetos, permitindo que os desenvolvedores escrevam código expressivo, conciso e robusto. A programação funcional, em particular, facilita o desenvolvimento de algoritmos de recomendação mais limpos e menos propensos a erros. A linguagem Scala é conhecida por sua performance, o que é fundamental para aplicações em tempo real. Scala é uma linguagem popular na comunidade de Big Data. Ferramentas e frameworks como Apache Spark, que são amplamente utilizados para processamento de grandes volumes de dados, são escritos em Scala. Isso proporciona ao Twitter uma vantagem ao integrar e utilizar essas tecnologias para processamento de dados em larga escala.
Salários no mercado:
Scala tem um dos salários mais generosos do mercado, a média anual para desenvolvedores Scala é em torno de $105,400 a $135,200. As cidades com os salários mais altos para desenvolvedores Scala incluem San Jose e Santa Clara, na Califórnia, onde os salários podem chegar a aproximadamente $141,531 por ano (Salary.com). Em termos de estados, os salários mais altos são encontrados no Distrito de Columbia, Califórnia, e Nova Jersey, com médias superiores a $120,000 por ano
Eu também estou planejando fazer uma série de posts, documentando meu progresso de estudo em scala, trazendo alguns tutoriais de coisas que eu achar interessante de trazer, no inicio ensinando os conceitos mais básicos e depois que eu aprender mais eu vejo se consigo arquitetar um desafio "Scala em 30 dias".
Fontes:
https://www.velvetjobs.com/salaries/scala-developer-salary
https://www.talent.com/salary?job=scala+developer
https://www.salary.com/research/salary/hiring/scala-developer-salary | brunociccarino |
1,917,605 | New day | Good day market men and woman. It’s nice to get on board😂😂 | 0 | 2024-07-09T16:41:07 | https://dev.to/stickgod/new-day-g2m | Good day market men and woman. It’s nice to get on board😂😂
-
1.
| stickgod | |
1,917,606 | Understanding the Josephus Problem: A Comprehensive Guide | Josephus Problem Explained 🎯 There are N people standing in a circle waiting to be... | 0 | 2024-07-09T16:43:12 | https://vampirepapi.hashnode.dev/understanding-the-josephus-problem-a-comprehensive-guide | dsa, recursion, algorithms, datastructures | ### [Josephus Problem Explained 🎯 ](https://youtu.be/ULUNeD0N9yI?si=7sCQtOfDpS8uWner)
There are N people standing in a circle waiting to be executed. The counting out begins at some point in the circle and proceeds around the circle in a fixed direction. In each step, a certain number of people are skipped and the next person is executed. The elimination proceeds around the circle (which is becoming smaller and smaller as the executed people are removed), until only the last person remains, who is given freedom.
Given the total number of persons N and a number k which indicates that k-1 persons are skipped and the kth person is killed in a circle. The task is to choose the person in the initial circle that survives.
**Examples:**
Input: N = 5 and k = 2
Output: 3
Explanation: Firstly, the person at position 2 is killed,
then the person at position 4 is killed, then the person at position 1 is killed.
Finally, the person at position 5 is killed. So the person at position 3 survives.
Input: N = 7 and k = 3
Output: 4
Explanations: The persons at positions 3, 6, 2, 7, 5, and 1 are killed in order,
and the person at position 4 survives.
## Brute Force Approach
To solve this problem using a brute-force approach, we can simulate the game step by step. This involves maintaining a list of friends and eliminating every \(k\)-th friend until only one friend remains. Here’s how we can implement this:
1. **Initialize the List**: Create a list of friends numbered from 1 to \(n\).
2. **Simulate the Elimination**: Start from the first friend and count \(k\) friends in the clockwise direction, wrapping around the list if necessary.
3. **Eliminate the Friend**: Remove the \(k\)-th friend from the list.
4. **Repeat**: Continue the process with the next friend immediately clockwise of the eliminated friend.
5. **Stop**: When only one friend is left, they are the winner.
### Explanation:
1. **Initialization**:
- `friends` is a list of integers from 1 to \(n\) representing the friends.
- `index` keeps track of the current position in the circle (0-based index).
2. **Elimination Loop**:
- The loop runs until only one friend remains in the list.
- In each iteration:
- Calculate the index of the friend to eliminate: `(index + k - 1) % len(friends)`. This ensures that the counting wraps around the list correctly.
- Remove the friend at the calculated index from the list.
- The `index` automatically points to the next friend (because removing an element shifts all elements to the left).
3. **Winner**:
- After the loop, the only remaining element in the `friends` list is the winner.
### Example Walkthrough (\(n = 5\), \(k = 2\)):
1. Initial list: `[1, 2, 3, 4, 5]`, start at `index = 0`.
2. Eliminate friend at `(0 + 2 - 1) % 5 = 1`, list becomes `[1, 3, 4, 5]`, next start at `index = 1`.
3. Eliminate friend at `(1 + 2 - 1) % 4 = 2`, list becomes `[1, 3, 5]`, next start at `index = 2`.
4. Eliminate friend at `(2 + 2 - 1) % 3 = 0`, list becomes `[3, 5]`, next start at `index = 0`.
5. Eliminate friend at `(0 + 2 - 1) % 2 = 1`, list becomes `[3]`.
Thus, the winner is friend number 3.
### Time Complexity (TC)
The brute-force approach has a time complexity that can be analyzed as follows:
1. **Initial List Creation**: Creating the list of friends takes \(O(n)\) time.
2. **Elimination Process**:
- In each iteration, we need to find the \(k\)-th friend to eliminate. This involves calculating the next index and removing the element from the list.
- Calculating the next index is an \(O(1)\) operation.
- Removing an element from the list takes \(O(n)\) time in the worst case because it involves shifting elements in the list.
- Since we perform the removal operation \(n-1\) times (once for each eliminated friend), the total time complexity for the elimination process is \(O(n \times n) = O(n^2)\).
Therefore, the overall time complexity of the brute-force approach is \(O(n + n^2) = O(n^2)\).
### Space Complexity (SC)
The space complexity can be analyzed as follows:
1. **Space for the List**: We maintain a list of friends, which requires \(O(n)\) space.
2. **Auxiliary Space**: No additional auxiliary space is required beyond the input and the list of friends.
Therefore, the overall space complexity is \(O(n)\).
### Summary
- **Time Complexity**: \(O(n^2)\)
- **Space Complexity**: \(O(n)\)
These complexities indicate that the brute-force approach is feasible for smaller values of \(n\), but may become inefficient for larger values due to the quadratic time complexity.
# Code
```
// package dailychallenge;
import java.util.ArrayList;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
class Solution {
public static int findTheWinner(int n, int k) {
ArrayList<Integer> friends = IntStream.range(1, n + 1).boxed().collect(Collectors.toCollection(ArrayList::new));
int idx = 0;
while (friends.size() > 1) {
idx = (idx + k - 1) % friends.size();
friends.remove(idx);
}
return friends.get(0);
}
public static void main(String[] args) {
int n = 6, k = 5;
int theWinner = findTheWinner(n, k);
System.out.println(theWinner);
}
}
```
****
## Optimized Approach
To solve this problem optimally, we can use the mathematical approach known as the Josephus problem, which has a well-known efficient solution. The optimal approach leverages the recursive formula of the Josephus problem to find the winner in \(O(n)\) time and \(O(1)\) space.
### Josephus Problem Recurrence Relation
The Josephus problem can be defined recursively:
\[
J(n, k) = (J(n-1, k) + k) \% n
\]
where \(J(n, k)\) is the position of the winner in a circle of size \(n\) with every \(k\)-th person being eliminated, and the base case is:
\[
J(1, k) = 0
\]
### Conversion to Iterative Approach
We can convert the recursive relation to an iterative approach to avoid the overhead of recursion and achieve an \(O(n)\) time complexity.
1. **Initialize the Winner's Position**: Start with \(J(1, k) = 0\) for one person.
2. **Iterate and Update**: Use the recurrence relation iteratively to update the winner's position for increasing sizes of the circle.
3. **Adjust for 1-Based Index**: The problem requires a 1-based index, so we convert the 0-based result to a 1-based result by adding 1 at the end.
### Python Code for the Optimal Solution
```python
def find_the_winner(n, k):
winner = 0 # Base case: when there's only one person, they are the winner (0-based index).
for i in range(2, n + 1): # Iterate from 2 to n
winner = (winner + k) % i # Update the winner's position
return winner + 1 # Convert from 0-based index to 1-based index
# Example usage:
n = 5
k = 2
print(find_the_winner(n, k)) # Output: 3
```
### Explanation
1. **Initialization**: Start with `winner = 0` (0-based index for \(n = 1\)).
2. **Iterate**: For each \(i\) from 2 to \(n\):
- Update the winner's position using the recurrence relation: `winner = (winner + k) % i`.
- This step ensures that the position of the winner is correctly computed as the circle grows.
3. **Convert to 1-Based Index**: After the loop, convert the result to a 1-based index by returning `winner + 1`.
### Complexity Analysis
- **Time Complexity**: The loop runs \(n-1\) times (from 2 to \(n\)), and each iteration involves a constant-time operation. Therefore, the time complexity is \(O(n)\).
- **Space Complexity**: The space complexity is \(O(1)\) because we only use a few variables regardless of the input size.
### Example Walkthrough (\(n = 5\), \(k = 2\))
1. Initial winner: `winner = 0` (for \(n = 1\)).
2. \(i = 2\): `winner = (0 + 2) % 2 = 0`
3. \(i = 3\): `winner = (0 + 2) % 3 = 2`
4. \(i = 4\): `winner = (2 + 2) % 4 = 0`
5. \(i = 5\): `winner = (0 + 2) % 5 = 2`
Convert to 1-based index: `2 + 1 = 3`. Thus, the winner is friend number 3.
The loop starts from 2 because we are building up the solution incrementally from the smallest case. Here’s a detailed explanation:
### Josephus Problem Explanation
The Josephus problem can be thought of as eliminating every \( k \)-th person in a circle until only one person remains. The position of the winner for \( n \) people can be derived from the position of the winner for \( n-1 \) people.
### Recursive Relation
The recursive relation for the Josephus problem is:
\[
J(n, k) = (J(n-1, k) + k) \% n
\]
This means:
- \( J(n, k) \) is the position of the winner in a circle of size \( n \).
- \( J(n-1, k) \) is the position of the winner in a circle of size \( n-1 \).
### Base Case
For \( n = 1 \) (a single person), the position of the winner is trivially 0 (0-based index):
\[
J(1, k) = 0
\]
### Iterative Approach
The iterative approach uses the recursive relation to build up the solution from the base case. Starting from the base case for \( n = 1 \), we iteratively compute the position of the winner for larger values of \( n \).
### Why Start the Loop from 2?
When \( n = 1 \), the winner is known to be at position 0. We use this as our starting point. The loop then iterates from 2 to \( n \) to compute the winner for larger circles:
1. **Base Case**: Initialize `winner` to 0 for \( n = 1 \).
2. **Iterate from 2 to \( n \)**: Update the winner's position using the recurrence relation.
Here’s the code with detailed comments:
```python
def find_the_winner(n, k):
winner = 0 # Base case: for n = 1, the winner is at position 0 (0-based index).
for i in range(2, n + 1): # Iterate from 2 to n to build up the solution
winner = (winner + k) % i # Update the winner's position using the recurrence relation
return winner + 1 # Convert from 0-based index to 1-based index
# Example usage:
n = 5
k = 2
print(find_the_winner(n, k)) # Output: 3
```
### Detailed Example Walkthrough
For \( n = 5 \), \( k = 2 \):
1. **Initialization**: Start with `winner = 0` (for \( n = 1 \)).
2. **Iteration**:
- For \( i = 2 \):
\[
\text{winner} = (0 + 2) \% 2 = 0
\]
- For \( i = 3 \):
\[
\text{winner} = (0 + 2) \% 3 = 2
\]
- For \( i = 4 \):
\[
\text{winner} = (2 + 2) \% 4 = 0
\]
- For \( i = 5 \):
\[
\text{winner} = (0 + 2) \% 5 = 2
\]
3. **Convert to 1-Based Index**: `2 + 1 = 3`.
Thus, the winner is friend number 3.
### Summary
- **Loop Starting from 2**: The loop starts from 2 because we already know the base case for \( n = 1 \). We build up the solution from this base case to the desired \( n \) using the recurrence relation.
- **Efficiency**: This approach efficiently computes the winner in \( O(n) \) time and \( O(1) \) space.
## Dryrun :
Let's perform a dry run of the recursive solution for \( n = 5 \) and \( k = 2 \).
### Dry Run of the Recursive Solution
We use the function `josephus_recursive(n, k)` to determine the position of the winner in a circle of size \( n \) with every \( k \)-th person being eliminated.
Here's the code again for reference:
```python
def josephus_recursive(n, k):
if n == 1:
return 0
else:
return (josephus_recursive(n - 1, k) + k) % n
def find_the_winner(n, k):
return josephus_recursive(n, k) + 1
```
### Steps and Recursive Calls
1. **Initial Call**:
```python
find_the_winner(5, 2)
```
This calls `josephus_recursive(5, 2)`.
2. **Recursive Calls**:
- `josephus_recursive(5, 2)` calls `josephus_recursive(4, 2)`.
- `josephus_recursive(4, 2)` calls `josephus_recursive(3, 2)`.
- `josephus_recursive(3, 2)` calls `josephus_recursive(2, 2)`.
- `josephus_recursive(2, 2)` calls `josephus_recursive(1, 2)`.
3. **Base Case**:
- `josephus_recursive(1, 2)` returns 0 because the base case is reached (\( n = 1 \)).
4. **Unwinding the Recursion**:
- `josephus_recursive(2, 2)`:
\[
(josephus_recursive(1, 2) + 2) \% 2 = (0 + 2) \% 2 = 0
\]
Returns 0.
- `josephus_recursive(3, 2)`:
\[
(josephus_recursive(2, 2) + 2) \% 3 = (0 + 2) \% 3 = 2
\]
Returns 2.
- `josephus_recursive(4, 2)`:
\[
(josephus_recursive(3, 2) + 2) \% 4 = (2 + 2) \% 4 = 0
\]
Returns 0.
- `josephus_recursive(5, 2)`:
\[
(josephus_recursive(4, 2) + 2) \% 5 = (0 + 2) \% 5 = 2
\]
Returns 2.
5. **Convert to 1-Based Index**:
- `find_the_winner(5, 2)`:
\[
josephus_recursive(5, 2) + 1 = 2 + 1 = 3
\]
Returns 3.
### Summary of Recursive Calls
- `josephus_recursive(5, 2)` returns 2.
- Convert the 0-based index to a 1-based index: \( 2 + 1 = 3 \).
The winner is friend number 3.
### Step-by-Step Visualization
1. **\( n = 1 \)**:
- Returns 0.
2. **\( n = 2 \)**:
- \( (0 + 2) \% 2 = 0 \)
- Returns 0.
3. **\( n = 3 \)**:
- \( (0 + 2) \% 3 = 2 \)
- Returns 2.
4. **\( n = 4 \)**:
- \( (2 + 2) \% 4 = 0 \)
- Returns 0.
5. **\( n = 5 \)**:
- \( (0 + 2) \% 5 = 2 \)
- Returns 2.
Convert the result to 1-based index: \( 2 + 1 = 3 \).
Thus, the winner is friend number 3. | vampirepapi |
1,917,607 | 1701. Average Waiting Time | 1701. Average Waiting Time Medium There is a restaurant with a single chef. You are given an array... | 27,523 | 2024-07-09T16:46:57 | https://dev.to/mdarifulhaque/1701-average-waiting-time-51ef | php, leetcode, algorithms, programming | 1701\. Average Waiting Time
Medium
There is a restaurant with a single chef. You are given an array `customers`, where <code>customers[i] = [arrival<sub>i</sub>, time<sub>i</sub>]:</code>
- <code>arrival<sub>i</sub></code> is the arrival time of the <code>i<sup>th</sup></code> customer. The arrival times are sorted in non-decreasing order.
- <code>time<sub>i</sub></code> is the time needed to prepare the order of the <code>i<sup>th</sup></code> customer.
When a customer arrives, he gives the chef his order, and the chef starts preparing it once he is idle. The customer waits till the chef finishes preparing his order. The chef does not prepare food for more than one customer at a time. The chef prepares food for customers **in the order they were given in the input**.
Return _the **average** waiting time of all customers_. Solutions within 10<sup>-5</sup> from the actual answer are considered accepted.
**Example 1:**
- **Input:** customers = [[1,2],[2,5],[4,3]]
- **Output:** 5.00000
- **Explanation:**
1) The first customer arrives at time 1, the chef takes his order and starts preparing it immediately at time 1, and finishes at time 3, so the waiting time of the first customer is 3 - 1 = 2.
2) The second customer arrives at time 2, the chef takes his order and starts preparing it at time 3, and finishes at time 8, so the waiting time of the second customer is 8 - 2 = 6.
3) The third customer arrives at time 4, the chef takes his order and starts preparing it at time 8, and finishes at time 11, so the waiting time of the third customer is 11 - 4 = 7.
So the average waiting time = (2 + 6 + 7) / 3 = 5.
**Example 2:**
- **Input:** customers = [[5,2],[5,4],[10,3],[20,1]]
- **Output:** 3.25000
- **Explanation:**
1) The first customer arrives at time 5, the chef takes his order and starts preparing it immediately at time 5, and finishes at time 7, so the waiting time of the first customer is 7 - 5 = 2.
2) The second customer arrives at time 5, the chef takes his order and starts preparing it at time 7, and finishes at time 11, so the waiting time of the second customer is 11 - 5 = 6.
3) The third customer arrives at time 10, the chef takes his order and starts preparing it at time 11, and finishes at time 14, so the waiting time of the third customer is 14 - 10 = 4.
4) The fourth customer arrives at time 20, the chef takes his order and starts preparing it immediately at time 20, and finishes at time 21, so the waiting time of the fourth customer is 21 - 20 = 1.
So the average waiting time = (2 + 6 + 4 + 1) / 4 = 3.25.
**Constraints:**
- <code>1 <= customers.length <= 10<sup>5</sup></code>
- <code>1 <= arrival<sub>i</sub>, time<sub>i</sub><= 10<sup>4</sup></code>
- <code>arrival<sub>i</sub> <= arrival<sub>i+1</sub></code>
**Solution:**
```
class Solution {
/**
* @param Integer[][] $customers
* @return Float
*/
function averageWaitingTime($customers) {
$currentTime = 0;
$totalWaitingTime = 0;
$n = count($customers);
foreach ($customers as $customer) {
$arrival = $customer[0];
$time = $customer[1];
if ($currentTime < $arrival) {
$currentTime = $arrival;
}
$currentTime += $time;
$totalWaitingTime += ($currentTime - $arrival);
}
return $totalWaitingTime / $n;
}
}
```
**Contact Links**
If you found this series helpful, please consider giving the **[repository](https://github.com/mah-shamim/leet-code-in-php)** a star on GitHub or sharing the post on your favorite social networks 😍. Your support would mean a lot to me!
If you want more helpful content like this, feel free to follow me:
- **[LinkedIn](https://www.linkedin.com/in/arifulhaque/)**
- **[GitHub](https://github.com/mah-shamim)** | mdarifulhaque |
1,917,609 | print() | In the second live session of the course, I learned about print() function. The quiz was fun. | 0 | 2024-07-09T16:48:21 | https://dev.to/amotbeli/print-4b46 | programming, python, beginners, learning | In the second live session of the course, I learned about `print()` function.
The quiz was fun. | amotbeli |
1,917,610 | Understanding Nextjs cache management | Introduction Next.js is a widely used framework with a variety of utilities that enable... | 0 | 2024-07-09T16:50:17 | https://dev.to/dunedev/understanding-nextjs-cache-management-54o8 | ## Introduction
Next.js is a widely used framework with a variety of utilities that enable more agile and efficient development. However, there is one topic that I find not very easy to understand, and that is how Next.js caches different things.
To better understand this, I should start by explaining that Next.js uses 4 different caches (Router cache, Full Route cache, Request Memoization cache, and Data cache). These are divided into 1 at the client level and 3 at the server level, as shown in the image.
Throughout this post, we will discuss how each of these caches works, whether they are used by default in Next.js 14 and Next.js 15, how to interact with them, and how to bypass them.
### Request Memoization cache
This cache belongs to React, not to Next.js per se, but Next.js uses it to cache fetch requests. This means that if the same request is made on a page, it won’t be made twice (in case of two identical requests on the same page). Instead, the value of the first request is returned, having been cached.
At first glance, this is very logical because it prevents repeated requests and thus improves the efficiency of our application. However, there might be specific cases where we need to make the same request within a single page and not receive the cached value as the response for the second request.
If we want to avoid this behavior, we need to pass a "signal" object from "AbortController" in the request options.
```js
async function fetchCarById(id) {
const { signal } = new AbortController();
const res = await fetch(`https://myapi.com/cars/${id}`, {
signal,
});
return res.json();
}
```
This cache is not used by default in Next.js 15, but it is in Next.js 14.
### Data cache
This cache is the last one that Next.js consults before fetching data from the API or database. It caches fetch requests so that when multiple users want to get the values of the same request, they are returned from the Data cache instead of making all the requests to the corresponding API/DB. This is especially useful for requests whose values change infrequently, thereby improving performance.
Let's return to the example of requesting car information by its ID.
```javascript
export default async function Page({ params }) {
const id = params.id;
const res = await fetch(`https://myapi.com/cars/${id}`);
const car = await res.json();
return (
<div>
<h1>{car.modelName}</h1>
<p>{car.info}</p>
</div>
);
}
```
By using this cache, we can prevent each user wanting information about this vehicle from making a request to the API or database, as this information will not change much.
In Next.js 14, each fetch request in server components is stored in the Data cache by default. This does not occur in Next.js 15, as fetch requests are not cached by default in this version.
This cache is persistent even between deployments of the application. Therefore, it is necessary to know the two ways we can clear this cache. These are:
- **Time-based Revalidation**: This method specifies how often data in this cache is cleared. It can be done in two ways:
1. The first option is by passing `next: { revalidate: 3600 }` in the fetch request options, indicating how long the response of this request will remain cached in the Data cache:
```javascript
const res = fetch(`https://myapi.com/cars/${id}`, {
next: { revalidate: 3600 },
});
```
2. The second option to set a revalidation time is to use the revalidate segment config option. This acts at the page level:
```javascript
export const revalidate = 3600;
export default async function Page({ params }) {
const id = params.id;
const res = await fetch(`https://myapi.com/cars/${id}`);
const car = await res.json();
return (
<div>
<h1>{car.modelName}</h1>
<p>{car.info}</p>
</div>
);
}
```
- **On-demand Revalidation**: If your data is not updated on a regular schedule, there's also the option to update the cached value when there's a change in this data. For example, in the case of a blog, it can use the cache unless there's a change and a new post is added.
This can be done in two ways:
1. Using `revalidatePath`, a function that takes the path from which you want to clear cached fetch request data:
```javascript
import { revalidatePath } from "next/cache";
export async function publishPost({ post }) {
createPost(post);
revalidatePath(`/posts/${post}`);
}
```
2. For more specific clearing, you can use the `revalidateTag` function.
First, specify a tag in the fetch request options for the data you want to clear from the cache:
```javascript
const res = fetch(`https://myapi.com/posts/${id}`, {
next: { tags: ["post"] },
});
```
Then use the `revalidateTag` function with that tag to identify and clear that request's data from the cache:
```javascript
import { revalidateTag } from "next/cache"
export async function publishPost({ post }) {
createPost(post)
revalidateTag(‘post’)
}
```
To bypass this cache, you can do so in two ways:
1. At the request level, by passing `'no-cache'` as the value to the `'cache'` property in the fetch request options:
```javascript
const res = fetch(`https://myapi.com/blogs/${Id}`, {
cache: "no-store",
});
```
2.At the page level, either by converting the page to dynamic and adding the following line at the beginning of page.tsx:
```javascript
export const dynamic = "force-dynamic";
```
Or by also adding the revalidate segment config option at the beginning of the page, setting it equal to 0:
```javascript
export const revalidate = 0;
```
### Full Route cache
The main benefit of this cache is that it allows Next.js to cache static pages during compilation, avoiding the need to generate those static pages on every request. Specifically, it stores the HTML and RSCP (React Server Component Payload) files that make up the page.
Unlike the Data cache, this cache is cleared with each deployment.
You can avoid using this cache in two ways:
1. By avoiding the use of the Data cache. If Data cache is not used, the Full Route cache will also not be used.
2. The second way is by using dynamic data on your page.
### Router cache
This cache differs from the others we've seen in that it is stored on the client side rather than the server side. It caches the routes the user has visited to pull from this cached data (HTML and RSCP) instead of making a request to the server. By default in Next.js 14, if the route is static, it remains cached for 5 minutes, and if dynamic, it remains cached for 30 seconds. This cache is stored at the user's session level, so if the user refreshes the page or closes the tab, the cached data will be cleared.
We can revalidate the data in this cache using revalidatePath or revalidateTag just like we did with the Data cache. Therefore, if we clear the Data cache using these functions, we are also clearing the Router cache data.
## Example of behavior in Nextjs 14 and Nextjs 15
In this example, we are going to show the differences in behavior between versions 14 and 15 of Next.js using the same configuration in both projects. For this, we will need 3 projects.
1. One that sets up a very simple API with an endpoint that returns a random number.
2. A project in Next.js 14 and another in Next.js 15, each with a Home page and an About page.
As we can see, the difference between the Home and About pages is that the Home page retrieves the random number by calling the endpoint of the API we created, while on the About page, the random number is obtained through Math.random().
With these projects deployed, we will make a series of observations distinguishing between deployments in development and production mode.
### Development Mode
**Important**: To ensure these examples work, the Next.js `Link` component must be used for navigating between pages.
#### Version 14.2.4
In version 14.2.4 of Next.js, the first page that fetches data by calling an external API, regardless of attempts to navigate away and return to this page (home), or even refresh the page from the browser, will consistently return the same value. This indicates that the fetched value is being cached.
Conversely, on the About page, which displays a randomly generated number without making any external calls, refreshing or not will only yield a different/updated number when the page is refreshed from the browser. This behavior is due to Route Cache, which ensures that when navigating between pages and the maximum lifetime of the cached page has not expired, the cached page continues to be served.
#### Version 15.0-rc
In version 15.0.0-rc.0, the behavior becomes more intuitive, as it does not cache fetch requests by default nor uses Route Cache by default. Regardless of how one navigates through the different pages, accessing them will yield different values each time.
---
### Production Mode
#### Version 14.2.4
In production mode for version 14.2.4, no numbers change (neither on the home page nor on the about page). Only the about page number changes once when refreshed from the browser. This occurs because the page is cached in Route Cache.
#### Version 15.0-rc
The behavior in production mode for version 15.0-rc is identical to that of version 14.
---
## Solution
To address the issue of page caching in version 15, a directive can be applied at the top of each page to mark it as dynamic:
```javascript
export const dynamic = "force-dynamic";
```
This allows all these pages in version 15 to be built dynamically, preventing Route Cache application and functioning similarly to development mode.
However, in version 14, the only improvement achieved is that upon refreshing the About page from the browser, its value updates. Accessing it via the `Link` still returns the stored value in the Route Cache of the page. For the Home page, despite version 14 also caching fetch requests by default (unlike version 15), refreshing the page from the browser always yields the same value. | dunedev | |
1,917,611 | canoe vascular surgeon | https://maps.google.com/maps?cid=7590796267880986503 | 0 | 2024-07-09T16:50:40 | https://dev.to/canoevascularsurgeon/canoe-vascular-surgeon-3ngj | [https://maps.google.com/maps?cid=7590796267880986503](https://maps.google.com/maps?cid=7590796267880986503) | canoevascularsurgeon | |
1,917,612 | canoe vascular surgeon | https://drive.google.com/drive/folders/16vTPk6GAVFb6fgv5VBIDPxSl5-DrtpQx?usp=sharing | 0 | 2024-07-09T16:51:10 | https://dev.to/canoevascularsurgeon/canoe-vascular-surgeon-1lip | [https://drive.google.com/drive/folders/16vTPk6GAVFb6fgv5VBIDPxSl5-DrtpQx?usp=sharing](https://drive.google.com/drive/folders/16vTPk6GAVFb6fgv5VBIDPxSl5-DrtpQx?usp=sharing) | canoevascularsurgeon | |
1,917,613 | Why "everthing" is a object in JavaScript | In JavaScript, "everything" is considered an object or can behave like an object due to its design... | 0 | 2024-07-09T16:53:13 | https://dev.to/dandankara/why-everthing-is-a-object-in-javascript-37hh | javascript, beginners, learning | In JavaScript, "everything" is considered an object or can behave like an object due to its design principles. Here are some of the main reasons for this; Some examples;
But wait, you see `null` is considere a object, but why?
> Some people say it's a bug of the first version of the language and according ECMAScript is "the internal absence of any object value", for more detail follown the link about this [Stackoverflow](https://stackoverflow.com/questions/18808226/why-is-typeof-null-object/18808300#18808300)
---
It can be said that, in JavaScript, any value capable of having properties is an object. This is not the case with primitives (undefined, null, boolean, number, bigint, string and symbol).
> Each instance of the Object type, also referred to simply as “an Object”, represents a collection of properties. Each property is either a data property, or an accessor property.
---
This design choice also aligns with JavaScript's dynamic nature, where objects can be created, modified, and extended at runtime without rigid class definitions. Functions, for example, are treated as objects and can be assigned to variables or passed around as arguments, showcasing JavaScript's functional capabilities alongside its object-oriented features.
In JavaScript, the pervasive concept that "everything is an object or behaves like one" stems from its foundational design principles, which prioritize flexibility, simplicity, and a dynamic approach to programming. This design philosophy underpins much of JavaScript's syntax and behavior, influencing how developers interact with data and functionality within the language.
---
<h2>References</h2>
- https://en.wikipedia.org/wiki/Primitive_data_type
- https://developer.mozilla.org/enUS/docs/Web/JavaScript/Reference/Operators/null
| dandankara |
1,917,614 | Iterators | Each collection is Iterable. You can obtain its Iterator object to traverse all the elements in the... | 0 | 2024-07-09T16:55:51 | https://dev.to/paulike/iterators-f3f | java, programming, learning, beginners | Each collection is **Iterable**. You can obtain its **Iterator** object to traverse all the elements in the collection. **Iterator** is a classic design pattern for walking through a data structure without having to expose the details of how data is stored in the data structure.
The **Collection** interface extends the **Iterable** interface. The **Iterable** interface defines the **iterator** method, which returns an iterator. The **Iterator** interface provides a uniform way for traversing elements in various types of collections. The **iterator()** method in the **Iterable** interface returns an instance of **Iterator**, as shown in Figure below, which provides sequential access to the elements in the collection using the **next()** method. You can also use the **hasNext()** method to check whether there are more elements in the iterator, and the **remove()** method to remove the last element returned by the iterator.
The code below gives an example that uses the iterator to traverse all the elements in an array list.
The program creates a concrete collection object using **ArrayList** (line 7) and adds four strings into the list (lines 8–11). The program then obtains an iterator for the collection (line 13) and uses the iterator to traverse all the strings in the list and displays the strings in uppercase (lines 14–16).
You can simplify the code in lines 13–16 using a foreach loop without using an iterator, as follows:
`for (String element: collection)
System.out.print(element.toUpperCase() + " ");`
This loop is read as “for each element in the collection, do the following.” The foreach loop can be used for arrays as well as any instance of **Iterable**. | paulike |
1,917,615 | 🚀 *New stage in my mobile development adventure!* 🚀 | 🚀 New stage in my mobile development adventure! 🚀 Today marks a big milestone for me: I've set up my... | 0 | 2024-07-09T16:56:35 | https://dev.to/alibiaphanuel/new-stage-in-my-mobile-development-adventure-2o15 | javascript, programming | 🚀 *New stage in my mobile development adventure!* 🚀
Today marks a big milestone for me: I've set up my mobile development environment with React Native! 🎉
It wasn't an easy task, but every challenge met is a new skill acquired. I'm extremely excited to continue my learning and develop powerful and elegant mobile applications.
Stay tuned to follow my journey and discover my future projects! 💻📱
#MobileDevelopment #ReactNative #SelfTaughtDeveloper #TechJourney #Learning #NewSkills
---
What do you think?
| alibiaphanuel |
1,917,616 | 🚀 Advanced Terminal Calculator: Your Ultimate Dev Tool! 🌟 | 👋 Hey devs! I've been working on something super cool -- the Advanced Terminal Calculator! It's not... | 0 | 2024-07-09T16:57:34 | https://dev.to/safwanayyan/advanced-terminal-calculator-your-ultimate-dev-tool-15l0 | python, github, programming, opensource |
👋 Hey devs! I've been working on something super cool -- the **Advanced Terminal Calculator**! It's not just any old calculator. This baby combines a bunch of handy tools into one terminal interface. Whether you're a casual user or a pro, this calculator's got you covered. 🎉
* * * * *
### 🌟 Features
Imagine having a calculator that does more than just math. This one can convert units, fetch the weather, get the latest news, and even chat with OpenAI's ChatGPT. 😲 Here's a quick rundown of what it can do:
- 💱 **Currency Conversion**: Real-time exchange rates.
- 🌦️ **Weather Updates**: Get weather info for any location.
- 📰 **News Headlines**: Stay updated with the latest news.
- 🧮 **Advanced Math Functions**: From basic arithmetic to complex operations.
- 🎙️ **Voice Assistance**: Results read out loud with TTS.
- 📜 **History Logging**: Track all your past calculations.
- 🔢 **Unit Conversion**: Convert between different units easily.
- 🌡️ **Temperature Conversion**: Switch between Celsius, Fahrenheit, and Kelvin.
- 🤖 **GPT-3.5 Turbo**: Chat with OpenAI's ChatGPT.
- 📋 **Copy to Clipboard**: Easily share your results.
* * * * *
### ⚙️ Getting Started
Setting it up is super simple:
1. **Clone the repo:** `git clone https://github.com/SafwanAyyan/Calculator`
2. **Install dependencies:** `pip install -r requirements.txt`
3. **Run the tool:** `python calculator.py`
* * * * *
### 👨💻 Developer Humor
Why do programmers prefer dark mode? Because light attracts bugs! 🐞😄
* * * * *
Check it out and let me know what you think! 🚀
Happy coding! 💻✨ | safwanayyan |
1,917,617 | Introduction to Offensive Security: A Beginner's Guide | In today's digital age, cybersecurity is more crucial than ever. With cyber threats evolving rapidly,... | 0 | 2024-07-09T16:58:00 | https://dev.to/resource_bunk/introduction-to-offensive-security-a-beginners-guide-ek1 | books, security, webdev, beginners | In today's digital age, cybersecurity is more crucial than ever. With cyber threats evolving rapidly, organizations and individuals alike must adopt proactive measures to safeguard their systems and data. One such proactive approach is offensive security, commonly known as penetration testing.
**What is Offensive Security?**
Offensive security, often referred to as ethical hacking, involves authorized attempts to evaluate the security posture of a system or network by simulating attacks. Unlike malicious hackers, ethical hackers operate within legal boundaries to identify vulnerabilities and weaknesses that could be exploited by adversaries.
**Importance of Offensive Security**
The primary goal of offensive security is to uncover weaknesses in systems before malicious hackers can exploit them. By conducting penetration tests and vulnerability assessments, organizations can proactively identify and mitigate potential risks, thereby strengthening their overall security posture.
**Responsible Use and Ethical Guidelines**
Ethics play a crucial role in offensive security practices. Ethical hackers must adhere to strict guidelines to ensure their actions do not cause harm or disruption. Responsible use of offensive security techniques involves obtaining proper authorization, maintaining confidentiality, and disclosing vulnerabilities responsibly.
**Foundations of Offensive Security**
To excel in offensive security, one must first understand the foundational principles and techniques involved:
1. Vulnerabilities:
Identifying vulnerabilities is the cornerstone of offensive security. These can range from software flaws to misconfigurations that could potentially compromise the security of a system.
2. Penetration Testing:
Penetration testing involves simulating attacks to assess the security of a system. It typically follows a systematic approach to identify vulnerabilities and validate their severity.
3. Tools of the Trade:
Ethical hackers rely on a variety of tools and software to conduct penetration tests effectively. These tools aid in scanning networks, performing reconnaissance, and exploiting vulnerabilities.
4. Setting Up a Lab Environment:
Creating a secure lab environment is essential for practicing offensive security techniques safely. This environment allows ethical hackers to test exploits and techniques without risking real-world systems.
**Conclusion**
As cyber threats continue to evolve, the demand for skilled ethical hackers proficient in offensive security techniques is on the rise. Whether you're an IT professional, cybersecurity enthusiast, or student aspiring to enter the field, understanding offensive security is paramount.
To delve deeper into offensive security, explore our comprehensive guide on penetration testing and ethical hacking. Gain insights into advanced techniques like exploit development, privilege escalation, and maintaining access through our ebook, tailored for cybersecurity professionals and enthusiasts alike.
Ready to elevate your cybersecurity skills? Download our ebook today and embark on a journey to mastering offensive security. Visit **[here]( https://resourcebunk.gumroad.com/l/Offensive-Security)** to get started.
Link -**[ https://resourcebunk.gumroad.com/l/Offensive-Security]( https://resourcebunk.gumroad.com/l/Offensive-Security)** | resource_bunk |
1,917,620 | Exploring the Frontier of AI: Deep Learning, Machine Learning, and More | Getting Started with Deep Learning: Modern agriculture is a complex science, and it requires quite a... | 0 | 2024-07-09T17:01:20 | https://dev.to/safwan_nasir_51209157325d/exploring-the-frontier-of-ai-deep-learning-machine-learning-and-more-35bg | deeplearning, ethicsinai, aiapplications, machinelearning |
Getting Started with Deep Learning: Modern agriculture is a complex science, and it requires quite a lot of efforts and time for a man to learn its basics let alone all the peculiarities of farming If you are interested in knowing what modern farming is and do not want to spend days and nights to explore the available information on this subject, we can help you to do it Here is a brief guide on modern agriculture for a beginner.
Introduction
The deep learning is the branch of machine learning which tries to mimic the neural networks of the brain. It is quite useful in several fields such as computer vision, natural language processing, and more.
What is Deep Learning?
Definition: A subclass of machine learning algorithms that employ neural networks which are deep in their architectures.
Components: Perceptron, classification of layers, types of activation.
Why Deep Learning?
Performance: Provides state of the art solutions to several tasks.
Applications: self-driving cars, facial and voice recognition, disease diagnosis.
How to Get Started
Prerequisites: Python, particularly for programing, knowledge of linear algebra and calculus is also necessary.
Tools & Frameworks: To name a few, TensorFlow, Keras, PyTorch.
Learning Resources: Web based classes, course notes, and tutorial.
Example Project
Create a basic environment for an image classifier with the help of TensorFlow and Keras.
Conclusion
Getting into deep learning therefore entails at least having a rudimentary understanding of how it works and seeing some of the uses.
These types of digests of the information can be made and to understand Convolutional Neural Networks (CNNs) how they work, their components and how one can be implemented, you need to do the following.
**Understanding Convolutional Neural Networks (CNNs)**
Introduction
CNNs are special types of neural networks that have been developed with the sole purpose of dealing with structured grid data such as images.
What are CNNs?
Definition: Decomposition of data that involves the convolution layers within the neural networks.
Key Layers: Convolutional layers that use filters and pooling layers to extract features and reduce the dimensionality of a piece of data to a fully connected layer.
How CNNs Work
Convolutional Layers: Filters should be applied to detect the features.
Activation Functions: Introduce non-linearity.
Pooling Layers: Reduce dimensionality.
Applications of CNNs
Computer Vision: Object detection, classification of images.
Healthcare: Medical image analysis.
Example Implementation
Trying to create a simple CNN network for image classification in Keras.
Conclusion
CNNs are essential for tasks concerning spatial data. Studying them paves the way for applying them in other complex image and video analysis tasks.
**Using of Recurrent Neural Networks (RNN) for Time Series Analyses**
Introduction
RNNs are meant for sequential data, and thus, appropriate for time series data.
What are RNNs?
Definition: Sequential data processing Neural networks.
Key Features: In a loop, an ability to remember inputs that were given previously.
How RNNs Work
Basic Architecture: There are three types of layer present in RNN they are input layer, RNN layers, and output layer.
Variants: Hence, LSTM, but for considerably improved results, refer to the GRU.
Applications of RNNs
Time Series Forecasting: stocks, changes in climate, and even standard numerical values and their employment.
Natural Language Processing: Speech to text, Text generation, Text to speech, Sentiment analysis.
Example Implementation
Training a Recurrent Neural Network Model for time series forecasting challenge.
Conclusion
Sequential data analysis and forecasting is highly dependent on the use of RNNs.
**A Tutorial on Building Your First Neural Network Model With TensorFlow**
Introduction
TensorFlow is one of the widely used and most effective platforms to build the machine learning models.
Getting Started with TensorFlow
Installation: [Setting up TensorFlow in your environment].
Basic Concepts: Tensors, computational describers, or sessions.
Tutorial of Cumulative Neural Network
Define the Model: Slopes, ReLU activation function .
Compile the Model: It stands for Loss function , Optimizer.
Train the Model: Averaging the result of two previous layers into the squared error between the model’s predicted output and the actual output, fit the model to data.
Evaluate the Model: Evaluate results .
Example Project
Building a simple neural network in order to classify digits on the MNIST dataset.
Conclusion
Constructing a neural network from scratch in TensorFlow enables you to understand fundamental ideas that are useful for complex programs.
Context: The general idea of Transfer Learning and some of its uses in Image Classification
**Exploring Transfer Learning and Its Applications in Image Classification**
Introduction
Transfer learning utilizes existing trained models so that the training can be enhanced to optimize for new tasks.
What is Transfer Learning?
Definition: Evaluating the model’s knowledge for a new, but related task.
How Transfer Learning Works
Approach: Transfer learning, feature extraction, working over the specific layers of pre-trained models.
Applications
Image Classification: Transfer learning is also possible using models like VGG16, ResNet for new datasets.
Object Detection: Tuning in of the models for the particular objects.
Example Implementation
Comparing the results of transfer learning with VGG16 for a new image classification task.
Conclusion
In fact, transfer learning helps speed up the creation of new models and likewise enhances the efficiency of models on other related tasks.
Natural Language Processing with Transformers: This paper aims at evaluating the existing literature regarding the implementation of MBWA as a management strategy at the workplace.
Introduction
Self-attention or attention mechanisms embedded in transformers have been the cornerstone in the reformation of NLP tasks.
What are Transformers?
Definition: The models created to work with sequences of data with attention.
Key Concepts: A heads, positional encodings, self-attention.
How Transformers Work
Architecture: It is common to see an encoder-decoder structure, attention layers.
Applications of Transformers
Text Generation: GPT-3, BERT.
Machine Translation: Google Translate.
Example Implementation
Training and using a simple text generation model based on transformer.
Conclusion
Machine learning enables solution of numerous problem areas in the healthcare industry.
**A Guide to Tuning up Hyperparameters in order to Improve the Model’s Performance**
Introduction
Hyperparameter optimization is one of the most important ways of enhancing machine learning algorithms.
What are Hyperparameters?
Definition: Setting parameters related to the learning process (e. g. learning rate, sizes of the batches).
Hyperparameter Optimization Techniques
Methods: These are grid search, random search and Bayesian optimization.
Example Techniques
Implementing Grid Search: Expliting parameter values.
Bayesian Optimization: Transforming the choice of hyperparameters to use probabilistic models.
Conclusion
It is crucial to emphasize that proper hyperparameters’ optimization can contribute much to boosting the model’s performance.
**Autoencoder Basics and the Methods for Anomaly Detection**
Introduction
Autoencoders are as types of unsupervised learning which can be beneficial for anomaly detection.
What are Autoencoders?
Definition: Neural networks for reconstructing the data.
Architecture: Encoder, bottleneck, decoder.
How Autoencoders Work
Training: Developing the ability to restore the data.
Anomaly Detection: Discovering signs of patterns other than the expected ones.
Example Implementation
Autoencoder application in the context of anomaly detection in the large data set of network traffics.
Conclusion
Autoencoders are useful for discovering anomalies in different fields since they provide the hidden representation of the data.
Ethics in AI: Risk It Is Good to be Balanced between Dynamism and Conservatism
Introduction
AI is a rapidly progressing field, and concern with ethical elements is necessitated more strictly.
Key Ethical Issues
Bias and Fairness: Avioding model implementation that opens up innovative ways for biases to be given a new relevance.
Transparency: Transparency and explainability of how AI arrives at such a decision.
Accountability: Possible problems and positive outcomes of AI and who is to blame for them.
Approaches to Ethical AI
Frameworks: Formulating regulatory policies in the fields of artificial intelligence’s creation and utilization.
Example Discussions
Case Studies: This paper will explore some of the ethical issues that arise when using those applications of Artificial Intelligence.
Best Practices: A 2019 paper on how to make the development of AI more responsible.
Conclusion
The future of AI and the idea of innovation must be preserved with ethical approaches in the middle to consider. | safwan_nasir_51209157325d |
1,917,621 | Foundations of Offensive Security: Understanding Vulnerabilities | In the realm of cybersecurity, understanding vulnerabilities is akin to knowing your enemy's... | 0 | 2024-07-09T17:01:38 | https://dev.to/resource_bunk/foundations-of-offensive-security-understanding-vulnerabilities-4e8m | webdev, beginners, programming, tutorial | In the realm of cybersecurity, understanding vulnerabilities is akin to knowing your enemy's weaknesses before they strike. Vulnerabilities, whether they stem from software flaws, misconfigurations, or human error, pose significant risks to the security of systems and networks. In this blog post, we delve into the foundational aspects of offensive security by exploring the critical role of vulnerabilities and how ethical hackers leverage this knowledge for penetration testing.
**What Are Vulnerabilities?**
Vulnerabilities refer to weaknesses or flaws in a system's design, implementation, or operation that could be exploited by malicious actors to compromise its security. These vulnerabilities can manifest in various forms, including:
- Software Vulnerabilities: Bugs or flaws in software code that hackers can exploit to gain unauthorized access or manipulate system behavior.
- Configuration Weaknesses: Improperly configured systems or services that inadvertently expose sensitive information or provide unauthorized access.
- Human Factors: Errors or mistakes made by users or administrators, such as weak passwords or falling victim to phishing attacks.
**The Role of Vulnerability Assessment**
Vulnerability assessment is a crucial component of offensive security practices. It involves systematic examination of systems, networks, and applications to identify potential vulnerabilities that could be exploited. Ethical hackers conduct vulnerability assessments using a variety of techniques, including automated scanning tools and manual inspection, to uncover weaknesses before malicious hackers can exploit them.
**Importance of Identifying Vulnerabilities**
Identifying vulnerabilities is the first step towards enhancing the security posture of an organization or individual. By proactively discovering and addressing weaknesses, organizations can:
- Mitigate Risks: Address vulnerabilities before they are exploited by malicious actors, reducing the likelihood of security breaches and data compromises.
- Strengthen Defenses: Implement robust security measures and patches to protect against known vulnerabilities and emerging threats.
- Enhance Compliance: Meet regulatory requirements and industry standards by maintaining a secure and resilient IT infrastructure.
**Conclusion**
In the dynamic landscape of cybersecurity, staying ahead of potential threats requires a proactive approach to identifying and mitigating vulnerabilities. Ethical hackers play a critical role in this process by conducting thorough vulnerability assessments and penetration tests to assess the resilience of systems and networks.
To deepen your understanding of offensive security and penetration testing, explore our comprehensive ebook on the subject. Gain insights into advanced techniques for exploiting vulnerabilities, conducting penetration tests, and securing your digital assets effectively.
Ready to enhance your cybersecurity knowledge? Download our ebook today and embark on a journey to mastering offensive security. Visit **[here]( https://resourcebunk.gumroad.com/l/Offensive-Security)** to get started.
Link -**[ https://resourcebunk.gumroad.com/l/Offensive-Security]( https://resourcebunk.gumroad.com/l/Offensive-Security)** | resource_bunk |
1,917,622 | Keeping Client Data Safe: Security Considerations for Cloud-Hosted ProLawyer | Law firms hold a vast amount of sensitive client data, making security a paramount concern. While... | 0 | 2024-07-09T17:01:52 | https://dev.to/petergroft/keeping-client-data-safe-security-considerations-for-cloud-hosted-prolawyer-2c6d | Law firms hold a vast amount of sensitive client data, making security a paramount concern. While [migrating ProLawyer to the cloud](https://www.clouddesktoponline.com/blog/prolawyer-system-requirements/) offers numerous advantages, it's crucial to understand the security implications and choose a cloud provider that prioritizes data protection.
Shared Responsibility Model:
Cloud hosting operates under a shared responsibility model. The cloud provider manages the security of the underlying infrastructure, while the law firm retains responsibility for securing its data and applications within the cloud environment.
Security Measures to Consider:
Here are some key security considerations for cloud-hosted ProLawyer:
Data Encryption: Ensure the cloud provider utilizes robust encryption algorithms (like AES-256) for data at rest and in transit. This scrambles data, rendering it unreadable even if intercepted.
Access Controls: Implement granular user access controls within ProLawyer. Restrict access to data and functionalities based on individual user roles and responsibilities. This minimizes the risk of unauthorized access or data breaches.
Multi-Factor Authentication (MFA): Enforce MFA for all ProLawyer user accounts. This adds an extra layer of security by requiring a secondary verification code, like a one-time password, in addition to a username and password.
Regular Security Audits: Conduct periodic security audits of your cloud-hosted ProLawyer environment. These audits can identify potential vulnerabilities and allow you to address them promptly.
Disaster Recovery Plan: Develop a comprehensive disaster recovery plan specifically for your cloud-based ProLawyer deployment. This plan should outline procedures for data recovery, system restoration, and business continuity in case of unforeseen events.
Choosing a Secure Cloud Provider:
When selecting a cloud provider, prioritize their security track record, certifications, and compliance with relevant data privacy regulations. Look for providers that offer features like secure data centers, intrusion detection/prevention systems, and regular security assessments.
Additional Considerations:
Data Residency: Understand where your client data will be physically stored by the cloud provider. This is important for complying with data residency regulations in specific jurisdictions.
Data Backup and Recovery: Choose a cloud provider that offers regular, automated backups of your ProLawyer data. Ensure you can easily restore data in case of accidental deletion or system failures.
Partnering with a Cloud Security Expert:
Apps4Rent, a leading provider of cloud services, can be a valuable asset in this endeavor. They offer robust cloud hosting solutions specifically designed for ProLawyer, ensuring your data remains protected.
By carefully evaluating these security considerations and choosing a reputable cloud provider like Apps4Rent, law firms can leverage the benefits of cloud-hosted ProLawyer while safeguarding sensitive client data. Remember, security is an ongoing process. Continuous monitoring, user awareness training, and staying informed about evolving cyber threats are all crucial for maintaining a secure cloud environment. | petergroft | |
1,917,624 | Penetration Testing Demystified: Techniques and Best Practices | In the realm of cybersecurity, staying ahead of potential threats requires a proactive approach to... | 0 | 2024-07-09T17:05:20 | https://dev.to/resource_bunk/penetration-testing-demystified-techniques-and-best-practices-46le | webdev, beginners, tutorial, learning | In the realm of cybersecurity, staying ahead of potential threats requires a proactive approach to identifying and mitigating vulnerabilities. Penetration testing, often referred to as pen testing, is a critical technique used by ethical hackers to assess the security of systems and networks. In this blog post, we explore the intricacies of penetration testing, its methodologies, and best practices.
**What is Penetration Testing?**
Penetration testing involves simulating real-world cyber attacks on systems, networks, or applications to identify vulnerabilities and weaknesses that could be exploited by malicious actors. Unlike vulnerability assessments, which focus on identifying weaknesses, penetration testing goes a step further by attempting to exploit these vulnerabilities to gauge the impact on the organization's security posture.
**Methodologies of Penetration Testing**
Effective penetration testing follows structured methodologies to ensure thorough assessment and actionable results. Common methodologies include:
- Black Box Testing: Also known as external testing, simulates an attack from an external threat with no prior knowledge of the system's internal structure or architecture. This approach mimics how real attackers would target an organization.
- White Box Testing: Also referred to as internal testing, provides testers with full knowledge of the system's internal architecture, including source code and network diagrams. This approach allows for a more in-depth assessment of vulnerabilities within the system.
- Gray Box Testing: Combines elements of both black box and white box testing. Testers have partial knowledge of the system's internal structure, such as user credentials or network diagrams, enabling a more targeted approach to vulnerability identification.
**Best Practices in Penetration Testing**
Successful penetration testing relies on adherence to best practices to ensure accurate results and minimize potential disruptions. Key best practices include:
1. Planning and Preparation: Define clear objectives, scope, and rules of engagement for the penetration test. Obtain proper authorization and inform stakeholders to minimize disruptions.
2. Reconnaissance and Information Gathering: Conduct thorough reconnaissance to gather intelligence about the target system or network. This includes identifying potential entry points and vulnerabilities.
3. Vulnerability Identification: Use automated scanning tools and manual techniques to identify vulnerabilities within the target environment. Prioritize vulnerabilities based on severity and potential impact.
4. Exploitation and Validation: Attempt to exploit identified vulnerabilities to validate their existence and potential impact on the organization's security posture. Exercise caution to avoid causing disruptions or data loss.
5. Reporting and Documentation: Document all findings, including exploited vulnerabilities and recommendations for remediation. Provide clear and actionable reports to stakeholders, highlighting the risk posed by identified vulnerabilities.
**Conclusion**
Penetration testing is a critical component of an organization's cybersecurity strategy, providing valuable insights into vulnerabilities that could be exploited by malicious actors. By following established methodologies and best practices, ethical hackers can help organizations identify and mitigate security risks proactively.
To delve deeper into penetration testing techniques and best practices, explore our comprehensive ebook on offensive security. Gain insights into advanced techniques for securing systems and networks effectively.
Ready to elevate your cybersecurity practices? Download our ebook today and embark on a journey to mastering offensive security. Visit **[here]( https://resourcebunk.gumroad.com/l/Offensive-Security)** to get started.
Link -**[ https://resourcebunk.gumroad.com/l/Offensive-Security]( https://resourcebunk.gumroad.com/l/Offensive-Security)** | resource_bunk |
1,917,625 | Setting Up Your Secure Lab Environment: Practice Makes Perfect | In the dynamic field of cybersecurity, hands-on practice is essential for mastering offensive... | 0 | 2024-07-09T17:08:21 | https://dev.to/resource_bunk/setting-up-your-secure-lab-environment-practice-makes-perfect-2m80 | beginners, tutorial, learning, opensource | In the dynamic field of cybersecurity, hands-on practice is essential for mastering offensive security techniques. Creating a secure lab environment provides ethical hackers and cybersecurity enthusiasts with a safe space to test and refine their skills without risking real-world systems. In this blog post, we explore the importance of setting up a secure lab environment and provide practical tips for getting started.
**Why Set Up a Secure Lab Environment?**
A secure lab environment serves as a controlled setting where practitioners can:
- Experiment Safely: Test penetration testing tools and techniques without causing disruptions or compromising live systems.
- Learn Effectively: Gain practical experience in identifying vulnerabilities, conducting exploits, and assessing security measures.
- Develop Skills: Hone skills in offensive security, exploit development, and penetration testing through hands-on practice and experimentation.
**Practical Tips for Setting Up Your Lab Environment**
1. Choose the Right Hardware and Software:
Select hardware and software that mimic real-world environments and support the tools you plan to use for penetration testing. Consider using virtualization platforms like VMware or VirtualBox for flexibility and scalability.
2. Segment Your Network:
Separate your lab environment from your production network to prevent accidental exposure or interference with live systems. Use virtual LANs (VLANs) or physical network segmentation to isolate lab traffic.
3. Use Dummy Data:
Populate your lab environment with dummy data to simulate realistic scenarios without compromising sensitive information. This ensures that your experiments do not inadvertently expose confidential or proprietary data.
4. Implement Security Measures:
Apply security best practices to your lab environment, such as using strong passwords, regularly updating software and patches, and configuring firewalls to restrict unauthorized access.
5. Document Your Setup:
Maintain detailed documentation of your lab environment configuration, including network diagrams, IP addresses, and installed software versions. This documentation helps streamline troubleshooting and replication of setups.
**Conclusion**
Setting up a secure lab environment is an invaluable step in advancing your skills in offensive security and penetration testing. By creating a controlled environment for hands-on practice, you can gain practical experience and confidence in identifying and mitigating security vulnerabilities.
To learn more about setting up a secure lab environment and mastering offensive security techniques, explore our comprehensive ebook on the subject. Gain insights into advanced practices for securing systems and networks effectively.
Ready to elevate your cybersecurity skills? Download our ebook today and embark on a journey to mastering offensive security. Visit **[here]( https://resourcebunk.gumroad.com/l/Offensive-Security)** to get started.
Link -**[ https://resourcebunk.gumroad.com/l/Offensive-Security]( https://resourcebunk.gumroad.com/l/Offensive-Security)** | resource_bunk |
1,917,626 | 19 Frontend Resources Every Web Developer Must Bookmark 🎨✨ | Finding useful web development resources can be overwhelming for both beginners and experienced... | 0 | 2024-07-09T17:21:45 | https://madza.hashnode.dev/19-frontend-resources-every-web-developer-must-bookmark | webdev, coding, frontend, productivity | ---
title: 19 Frontend Resources Every Web Developer Must Bookmark 🎨✨
published: true
description:
tags: webdev, coding, frontend, productivity
cover_image: https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ax7av2o3wnfidxr01p1o.png
canonical_url: https://madza.hashnode.dev/19-frontend-resources-every-web-developer-must-bookmark
---
Finding useful web development resources can be overwhelming for both beginners and experienced developers. With so many websites and web applications available, it can be challenging to identify the best ones.
I decided to curate some of my favorite front-end resources for colors and palettes, fonts, icons, illustrations, stock photos, and videos to help web developers improve their resource stack and save time on projects.
I hope these resources will help you stay informed, improve your productivity, and navigate the ever-evolving landscape of web development.
Each resource will include a direct link, a description, and an image preview.
---
## 1\. [ThemeSelection](https://themeselection.com/) (Sponsored)
ThemeSelection offers a curated collection of high-quality, customizable themes and [admin dashboard templates](https://themeselection.com/item/category/admin-templates/), perfect for creating stunning, responsive websites.
Explore their professional designs and transform your web development experience with Free Bootstrap, NextJS, VueJS admin templates, and more!
### 🔵 **Sneat Free Bootstrap Admin Template**
This free [Bootstrap admin template](https://themeselection.com/item/category/bootstrap-admin-template/) offers a sleek and modern design, packed with customizable components to streamline your workflow. With over 900 stars on Github, Sneat is one of the most used bootstrap dashboards.
Ideal for creating dynamic and responsive Bootstrap dashboard templates, Sneat is your go-to Bootstrap admin template for a polished user experience.
[⬇️ Download here](https://themeselection.com/item/sneat-dashboard-free-bootstrap/)
### ⚫ **Materio Free MUI NextJS Admin Template**
This free [NextJS dashboard template](https://themeselection.com/item/category/next-js-admin-template/) combines the robustness of MUI with the efficiency of NextJS, providing powerful features for the admin template. The only Open Source NextJS 14-based admin template with App router support.
Perfect for developers seeking a cutting-edge NextJS admin dashboard template to enhance their productivity. It has over 1.4k stars on GitHub.
[⬇️ Download here](https://themeselection.com/item/materio-free-mui-nextjs-admin-template/)
### 🟢 **Materio Free Vuetify VueJS Admin Template**
This free [Vue admin template](https://themeselection.com/item/category/vuejs-admin-templates/) offers comprehensive tools and features, making it an excellent choice for creating an intuitive Vue admin panel.
With its sleek design and rich functionality, this free VueJS admin dashboard is the perfect Vuejs admin template for your next project.
[⬇️ Download here](https://themeselection.com/item/materio-free-vuetify-vuejs-admin-template/)
Visit [ThemeSelection](https://themeselection.com/) today and take the first step toward a seamless web development experience!
Explore their [Free Admin Templates](https://themeselection.com/item/category/free-admin-templates/), [UI Kits](https://themeselection.com/item/category/ui-kits/), and [Bundle deals](https://themeselection.com/item/celebration-big-bundle-sale/)!
---
## Colors & palettes
### 2\. [Culrs](https://culrs.com)
Culrs is a color palette generator that provides curated color palettes for designers and developers.
It helps in creating visually appealing web designs by offering a variety of color combinations that can be used to enhance the aesthetic appeal of web projects.
### 3\. [ShadowLord](https://noeldelgado.github.io/shadowlord)
Shadowlord is a color tints and shades generator tool that allows users to create lighter and darker variations of any given color, facilitating easy color customization for web and graphic design.
This tool is particularly useful for developers as it helps in generating consistent color schemes, enhancing the aesthetic and usability of their projects.
### 4\. [ShaderGradient](https://shadergradient.co)
ShaderGradient is a gradient generator that uses shaders to create dynamic and visually stunning gradients.
This tool can be used to produce unique background effects, enhancing the overall user experience of web interfaces with eye-catching designs.
### 5\. [Color Wheel](https://canva.com/colors/color-wheel)
The Canva Color Wheel is an interactive tool for selecting color schemes.
It helps developers and designers find the perfect color combinations based on color theory principles, ensuring harmony and balance in web designs, thus boosting the visual consistency of projects.
### 6\. [Spectrum](https://colorspectrum.design/generator.html)
Spectrum provides a comprehensive range of color spectrums and palettes.
It assists developers in choosing precise color shades for their projects, ensuring that the chosen colors work well together to create a cohesive and appealing visual experience.
---
## Fonts & pairings
### 7\. [Google Fonts](https://fonts.google.com/)
Google Fonts offers a comprehensive library of free, open-source fonts.
It enables developers to enhance their web projects with a wide variety of typographic styles, ensuring better readability and aesthetic appeal.
### 8\. [Free Faces](https://freefaces.gallery)
Free Faces is a curated collection of free-to-use typefaces.
This tool helps developers and designers find unique and professional fonts without licensing concerns, enhancing the visual impact of their work.
### 9\. [Fontjoy](https://fontjoy.com)
Fontjoy uses machine learning to generate font pairings.
It helps developers and designers find harmonious font combinations, saving time and effort in selecting complementary typefaces.
---
## Icons
### 10\. [Feather Icons](https://feathericons.com)
Feather Icons is a collection of simple and elegant open-source icons.
These icons can be easily customized and integrated into web projects, enhancing the visual elements and user interface.
### 11\. [Google Icons](https://fonts.google.com/icons)
Google Icons offers a vast library of icons that are easy to integrate into web projects.
The tool improves the visual clarity and usability of web interfaces.
### 12\. [Iconic](https://iconic.app)
Iconic allows developers to organize, customize, and integrate icons into their projects seamlessly.
This tool helps streamline the design process, ensuring that icons are consistent and effectively enhance the user experience.
---
## Illustrations
### 13\. [Undraw](https://undraw.co/illustrations)
Undraw offers a collection of customizable illustrations that can be used for websites and apps.
These illustrations can be easily integrated into projects to enhance visual storytelling and improve user engagement with appealing graphics.
### 14\. [Absurd Design](https://absurd.design/)
Absurd Design provides a library of hand-drawn illustrations that add a unique and quirky touch to web projects.
These illustrations can be used to create a distinctive visual identity, making websites stand out with their unconventional style.
### 15\. [Patternkid](https://patternkid.com/workbench)
Patternkid is a tool for generating unique, kid-friendly patterns.
These patterns can be used as backgrounds or decorative elements in web designs, particularly for child-focused websites, adding a playful and engaging visual element.
### 16\. [Error 404](https://error404.fun)
Error 404 Fun offers creative and humorous illustrations specifically designed for 404 error pages.
By using these illustrations, developers can turn an otherwise frustrating user experience into a delightful one, maintaining user engagement even when a page is not found.
---
## Stock photos & videos
### 17\. [Unsplash](https://unsplash.com)
Unsplash is a website offering a large collection of high-resolution, royalty-free photos.
Web developers can use these images to enhance the visual appeal of their websites, adding high-quality visuals without worrying about copyright issues.
### 18\. [Pexels](https://www.pexels.com)
Pexels provides free stock photos and videos that can be used for personal and commercial projects.
It helps developers find high-quality visuals quickly, improving the overall look of web projects and saving time on sourcing images.
### 19\. [Pixabay](https://pixabay.com)
Pixabay offers a vast library of free images, videos, and music.
It’s a valuable resource for developers needing multimedia content for their websites, ensuring visually rich and engaging web designs without the hassle of licensing concerns.
---
Writing has always been my passion and it gives me pleasure to help and inspire people. If you have any questions, feel free to reach out!
Make sure to receive the best resources, tools, productivity tips, and career growth tips I discover by subscribing to [**my newsletter**](https://madzadev.substack.com/)!
Also, connect with me on [**Twitter**](https://twitter.com/madzadev), [**LinkedIn**](https://www.linkedin.com/in/madzadev/), and [**GitHub**](https://github.com/madzadev)! | madza |
1,917,627 | Mastering Reconnaissance in Cybersecurity: The Art of Gathering Intel | In the world of cybersecurity, knowledge is power. Before launching any offensive security operation,... | 0 | 2024-07-09T17:10:32 | https://dev.to/resource_bunk/mastering-reconnaissance-in-cybersecurity-the-art-of-gathering-intel-2g2e | beginners, tutorial, opensource, learning | In the world of cybersecurity, knowledge is power. Before launching any offensive security operation, ethical hackers must gather intelligence about their target to understand its weaknesses and vulnerabilities. This process, known as reconnaissance, plays a pivotal role in assessing security postures and identifying potential entry points for exploitation. In this blog post, we explore the essential techniques of reconnaissance and their significance in offensive security.
**What is Reconnaissance?**
Reconnaissance, often referred to as recon, is the preliminary phase of a penetration test or cybersecurity assessment. Its primary objective is to gather information about the target organization, network, or system. This information helps ethical hackers identify vulnerabilities, potential attack vectors, and critical assets that could be targeted by malicious actors.
**Techniques of Reconnaissance**
1. Footprinting:
Footprinting involves gathering publicly available information about the target, such as domain names, IP addresses, employee details, and organizational structure. This information provides a blueprint of the target's digital footprint, helping ethical hackers understand its infrastructure and potential entry points.
2. OSINT (Open Source Intelligence):
OSINT refers to the collection and analysis of publicly available information from sources such as social media, websites, online forums, and public databases. Ethical hackers use OSINT tools and techniques to gather valuable insights about the target's personnel, technologies, and operational practices.
3. Scanning and Enumeration:
Once initial information is gathered, scanning involves actively probing the target's network to identify active hosts, open ports, and services. Enumeration follows scanning and involves gathering more detailed information about the identified services and systems, such as user accounts, network shares, and configurations.
**Importance of Reconnaissance in Offensive Security**
Effective reconnaissance provides ethical hackers with a comprehensive understanding of the target environment, enabling them to:
- Identify Weaknesses: Pinpoint vulnerabilities and potential entry points that could be exploited during penetration testing.
- Formulate Attack Strategies: Develop targeted attack strategies and methodologies based on the gathered intelligence.
- Mitigate Risks: Advise organizations on mitigating security risks by addressing identified vulnerabilities and improving defensive measures.
**Conclusion**
Mastering reconnaissance is essential for ethical hackers and cybersecurity professionals seeking to enhance their offensive security capabilities. By employing sophisticated techniques such as footprinting, OSINT, and scanning, practitioners can gather actionable intelligence and conduct effective penetration tests to assess and strengthen an organization's security posture.
To delve deeper into reconnaissance techniques and their application in offensive security, explore our comprehensive ebook on the subject. Gain insights into advanced practices for securing systems and networks effectively.
Ready to elevate your cybersecurity skills? Download our ebook today and embark on a journey to mastering offensive security. Visit **[here]( https://resourcebunk.gumroad.com/l/Offensive-Security)** to get started.
Link -**[ https://resourcebunk.gumroad.com/l/Offensive-Security]( https://resourcebunk.gumroad.com/l/Offensive-Security)**
| resource_bunk |
1,917,628 | Understanding API Gateway Pricing: Maximizing Features While Minimizing Costs | Filtering and segmenting traffic to and from your app is critical to the consistent safety of your... | 0 | 2024-07-10T06:00:00 | https://www.getambassador.io/blog/api-gateway-pricing?utm_campaign=Corporate&utm_source=linkedin&utm_medium=social&utm_content=PricingBlog | api, apigateway, price | Filtering and segmenting traffic to and from your app is critical to the consistent safety of your software development lifecycle, and finding the right API Gateway is just as important. Let’s look through the key components of an API gateway and the different ways companies tend to price them.
What is an API Gateway?
An API Gateway acts as a critical checkpoint in your infrastructure where you can place barriers and rules for APIs connecting to your [microservices](https://www.getambassador.io/blog/creating-a-microservice).
When comparing API Gateway products you’ll see a consistent set of features that solve for the need of improving security to and from your [microservices](https://www.getambassador.io/blog/creating-a-microservice), ideally without introducing latency. Here are some of the main features that impact the structure and cost of those products.
## 4 Key Components of API Gateway Pricing
**Request Thresholds:** Typically identified as the amount of requests your API gateway can handle per second, this is a key factor in keeping your APIs working without lag.
**Common Features: **Rate Limiting, Load Balancing, Routing
**Security**: Your API gateway is the primary barrier between your [microservices](https://www.getambassador.io/blog/creating-a-microservice) and traffic coming in from anyone and anywhere. Make sure your metaphorical bouncer is buff with tools to turn away malicious users.
**Common Features:** WAF, IP Whitelisting, Rate Limiting
Performance and Scalability: Improve your ability to control, manage, and expand your API Gateway as your organization grows.
**Common Features:** SSO, Automatic HTTPS, Air-Gapped capabilities, Dev Portal
**Support and Maintenance Services:** When problems arise, is there anyone out there (besides that one Reddit thread from three years ago) who can help you in real time? Is the gateway you chose native to your microservices environment, making it simpler to maintain? And if you’re considering an open source project - is that project actively maintained?
**Common Features:** community site, Support portal, dedicated Customer Service representative, Service Level Agreements (SLA)
## How to Compare API Gateway Pricing Models
Comparing pricing of the API Gateway products you are assessing comes down to two major comparisons: [freemium](https://www.getambassador.io/edge-stack-pricing) vs paid packages and flat rate vs usage-based pricing.
Understanding your current API usage to your microservices is what you’ll need to know in order to identify the right type of plan. We’ll get into some detailed examples below.
## How to Compare API Gateway Pricing Models
**Flat Rate vs. Usage-Based
**Like other flat-rate vs usage-based product products, the choice between flat rate and usage-based pricing should be based on long-term cost efficiency. Analyze your average yearly metrics for API requests to your microservices - do they vary greatly from month to month? Would a flat-rate package limit your usage, cutting off access to your API gateway if you meet your limit too soon? Is the usage limit based on monthly usage or a larger increment? All of the answers to these questions are going to impact the amount you’ll spend.
## OSS vs [Freemium](https://www.getambassador.io/edge-stack-pricing) vs Paid Packages
Open-source software (OSS) can be a useful starting point, but may not be advantageous in the long run. OSS updates aren't guaranteed—this could seriously compromise your company's security and traffic management using an API Gateway. On the other hand, [freemium](https://www.getambassador.io/edge-stack-pricing) is the perfect option for initially testing an API gateway, especially suitable for smaller products.
These versions typically offer a very limited version of a paid product, without any of the bells and whistles that companies sometimes require (like SSO or RBAC availability). Spend your time seeing what the freemium versions offer, and compare that list to your security needs and your usage needs. When the discrepancy between what you need and what freemium can offer you begins to expand, it’s time to start looking at a paid version.
## Reducing Costs While Maximizing Value from Your API Gateway
There’s a good chance that if you’re here, you’re vetting what you need from an API gateway within your infrastructure. So let’s talk about ways to strategize so you can get the right product at the right price – without compromising on features.
When you’re calculating costs for your potential [API gateway](https://www.getambassador.io/products/edge-stack/api-gateway), it is beneficial to understand your needs on a monthly and a yearly basis. Building out a quick spreadsheet calculator to assess the costs between each feature is something worth considering due to the complexities that come with [API Gateway](https://www.getambassador.io/products/edge-stack/api-gateway) pricing.
You will be able to plug in each pricing factor, using the best guess of any variable costs based on historic averages to gather total estimates for your needs. This will allow for a concentrated comparison between products based on the total annual cost – regardless of the pricing mode, highlighting each of your must-have features (like WAF or Kubernetes native with [Edge Stack](https://www.getambassador.io/products/edge-stack/api-gateway)) to your nice-to-have features.
When it comes down to the final decision, cost will always be a factor – something that does not go unnoticed especially in this economic climate. Ultimately, the best method to reduce your costs while maximizing value from your API gateway will be carving out the right budget for what you need to start and grow from there. | getambassador2024 |
1,917,629 | Understanding Taints and Tolerations in Kubernetes | Welcome back to my blog series on Kubernetes! Today we will be taking a dive into a crucial yet... | 0 | 2024-07-09T17:12:18 | https://dev.to/jensen1806/understanding-taints-and-tolerations-in-kubernetes-7oj | kubernetes, devops, cicd, containers | Welcome back to my blog series on Kubernetes! Today we will be taking a dive into a crucial yet confusing topic: Taints and Tolerations. Understanding this concept is vital for anyone working with Kubernetes, as it helps manage workloads more effectively. By the end of this post, you'll have a clear understanding of how to use taints and tolerations, and you'll be able to apply these concepts confidently in your own projects.
### What Are Taints and Tolerations?
Taints and tolerations work together to ensure that pods are not scheduled onto inappropriate nodes. Taints are applied to nodes, and they repel pods that do not have the corresponding toleration. This mechanism is essential for managing workloads that have specific requirements, such as running AI workloads on nodes with GPUs.
#### How Taints Work
A taint is a key-value pair that you apply to a node. For instance, you might have a node dedicated to AI workloads, which requires GPUs. You can taint this node with key=value, such as GPU=true. This taint will prevent pods that do not tolerate this taint from being scheduled on the node.
#### How Tolerations Work
To allow a pod to be scheduled on a node with a taint, you need to add a toleration to the pod. A toleration has to match the taint's key-value pair. For example, if your node has a taint GPU=true, your pod must have a toleration GPU=true to be scheduled on that node.
### Taints and Tolerations in Action
Let's break down a practical example:
1. **Tainting a Node**:
```
kubectl taint nodes <node-name> GPU=true:NoSchedule
```
This command applies a taint to a node, ensuring that only pods with the toleration **GPU=true** can be scheduled on it.
2. **Adding a Toleration to a Pod**:
```
apiVersion: v1
kind: Pod
metadata:
name: ai-pod
spec:
containers:
- name: ai-container
image: ai-image
tolerations:
- key: "GPU"
operator: "Equal"
value: "true"
effect: "NoSchedule"
```
This YAML file defines a pod with a toleration that matches the node taint.
When you create this pod, Kubernetes will check the taint on the node and the toleration on the pod. If they match, the pod will be scheduled on the tainted node.
### Effects of Taints
There are three main effects that you can specify with taints:
1. **NoSchedule**: Pods that do not tolerate the taint will not be scheduled on the node.
2. **PreferNoSchedule**: Kubernetes will try to avoid scheduling pods that do not tolerate the taint on the node, but it is not guaranteed.
3. **NoExecute**: Pods that do not tolerate the taint will be evicted from the node if they are already running.
### Node Selectors
While taints and tolerations control which pods can be scheduled on which nodes, node selectors are another way to control pod placement. Node selectors work by adding labels to nodes and specifying those labels in pod specifications.
```
apiVersion: v1
kind: Pod
metadata:
name: ai-pod
spec:
containers:
- name: ai-container
image: ai-image
nodeSelector:
GPU: "true"
```
This configuration ensures that the pod is only scheduled on nodes with the label GPU=true.
### Example: Scheduling Pods with Taints and Tolerations
Let's see how this works in practice. First, we'll taint a node:
```
kubectl taint nodes worker1 GPU=true:NoSchedule
```
Next, we'll create a pod with a matching toleration:
```
apiVersion: v1
kind: Pod
metadata:
name: ai-pod
spec:
containers:
- name: ai-container
image: ai-image
tolerations:
- key: "GPU"
operator: "Equal"
value: "true"
effect: "NoSchedule"
```
Apply this pod configuration:
```
kubectl apply -f ai-pod.yaml
```
The pod will be scheduled on the tainted node because it has the appropriate toleration.
### Conclusion
Taints and tolerations are powerful tools in Kubernetes that help you manage where pods are scheduled. By using taints, you can prevent certain workloads from running on specific nodes, while tolerations allow pods to be scheduled on nodes with matching taints. Node selectors provide additional control over pod placement by matching pod labels to node labels.
I hope this post has clarified the concept of taints and tolerations for you. In the next blog post, we'll explore node affinity and anti-affinity, which provide even more control over pod scheduling.
Happy coding, and stay tuned for the next post in this series!
For further reference, check out the detailed YouTube video here:
{% embed https://www.youtube.com/watch?v=nwoS2tK2s6Q&list=WL&index=17&t=1s %}
| jensen1806 |
1,917,631 | Building a Robust Next.js Quiz App: My Journey | The Challenge Recently, I embarked on an exciting project: building a Next.js app with dynamic... | 0 | 2024-07-09T17:17:35 | https://dev.to/rakahsan/attach-jwt-with-fetch-for-next-js-14-server-action-2gi4 | The Challenge
Recently, I embarked on an exciting project: building a Next.js app with dynamic client-server interactions and static site generation. The initial implementation was seamless, especially with token-based authentication for the login page. Everything was running smoothly until my client threw in a new requirement—a feature to create a quiz app.
This new feature demanded server-side rendering (SSR) to expose an API endpoint. The backend, built with Laravel, included authentication routes. The critical part was ensuring that the quiz questions were tailored to the user’s profile, requiring secure access to the authenticated user's data.
The Roadblocks
Token Access: The token needed for authentication was stored in local storage, inaccessible from the server side. Conversely, the client side couldn't use cookies.
Data Transmission: Although server-side data can be passed to the client via props, my component structure didn't allow for this straightforward transmission.
The Solution
Innovation and a bit of clever engineering helped me overcome these obstacles. Here's how:
Token in URL: By encoding the token as a URL parameter, I could access it server-side. This approach allowed me to retrieve the token and use it as a Bearer token in the header.
Seamless Integration: This method was not only secure but also adaptable, working flawlessly for infinite loading scenarios via server actions.
Final Thoughts
This project was a rewarding challenge, showcasing the power of combining Next.js with Laravel for a robust, full-stack solution. The ability to seamlessly integrate SSR with token-based authentication opened new doors for secure and dynamic user interactions.
Thanks for joining me on this journey! If you have any questions or need assistance with similar projects, don't hesitate to reach out. | rakahsan | |
1,917,678 | JavaScript 30 - 7 Array Cardio Day 2 | Hey all and welcome back to another day of Wes Bos's JavaScript30! Alright...it's been over 2 weeks... | 0 | 2024-07-10T19:01:19 | https://dev.to/virtualsobriety/javascript-30-7-array-cardio-day-2-4m59 | javascript, beginners, learning, webdev | Hey all and welcome back to another day of Wes Bos's [JavaScript30!](https://javascript30.com/) Alright...it's been over 2 weeks since my last post and that’s pretty sad. That being said, I did put in my notice at my current job and they have been running me into the ground so I haven't had as much time to work on my coding recently...but now that I am officially part time you can bet your asses that these posts are going to start coming more regularly and possibly more diverse as I will have time to work on other projects apart from just this one. However, you didn't come here for updates on my life you are here to see more about this course! So let's begin!
Array Cardio day 2 was NOTHING compared to day one. I won't lie. I was absolutely dreading going into this challenge based on how the first one went. The first course had me googling constantly and jumping through hoops. It truly felt like a workout, whereas this was more of a stretch or maybe a yoga session. The first part of Array Cardio day 2 involved using `Array.prototype.some()` and `Array.protoype.every()`. We were given an object within an array that held a list of people and the years they were born. With this information we were asked to figure out if at least one person was over 19 and then if every person was over 19.
```js
const people = [
{ name: 'Wes', year: 1988 },
{ name: 'Kait', year: 1986 },
{ name: 'Irv', year: 1970 },
{ name: 'Lux', year: 2015 }
];
// Some and Every Checks
// Array.prototype.some() // is at least one person 19 or older?
const isAdult = people.some(person => ((new Date())
.getFullYear()) - person.year >= 19 )
console.log({isAdult})
// Array.prototype.every() // is everyone 19 or older?
const areAdult = people.every(person => {
const currentYear = (new Date()).getFullYear();
return currentYear - person.year >= 19
}
)
console.log(areAdult)
```
This part of the challenge made me feel pretty damn good about myself, I won't lie about that. After a quick google search I had my answer on how to use `Array.prototype.some()` and that also directly applied to `.every()`. I absolutely blew that out of the water and felt like I would be able to finish this challenge in record time. It turns out I was both right and wrong...
The second and, somehow, the final part of this challenge involved `Array.prototype.find()` and `Array.prototype.findIndex()`. We were given another object within an array but this time it had a list of comments for some kind of restaurant reviews that all had their own id numbers to help differentiate them. Just like before doing a quick google search showed me how to use `.find()` and how to use it well, but it appears it wasn't exactly what Wes was looking for. I only used `.find()` while using `console.log` when referencing a function I made that called the id based on the number given. I guess I could argue that it was similar to what he did...kind of...you know, considering we both came up with the same result. But I don't know, I think I like my code better than his in this case.
```js
const comments = [
{ text: 'Love this!', id: 523423 },
{ text: 'Super good', id: 823423 },
{ text: 'You are the best', id: 2039842 },
{ text: 'Ramen is my fav food ever', id: 123523 },
{ text: 'Nice Nice Nice!', id: 542328 }
];
// Find is like filter, but instead returns just the one you are looking for
// find the comment with the ID of 823423
function hasId(idNumber) {
return idNumber.id === 823423
}
console.log (comments.find(hasId))
// Array.prototype.findIndex()
// Find the comment with this ID
// delete the comment with the ID of 823423
function thisId(idNumber) {
return idNumber.id === 823423
}
console.log (comments.findIndex(thisId))
const index = comments.findIndex(comment => comment.id === 823423)
const newComments = [
...comments.slice(0, index),
...comments.slice(index + 1)
]
console.table(newComments)
```
It also turns out that I was unclear about what he wanted us to do for the final part of the challenge. While having us use `findIndex()` he also wanted us to delete the comment with the same id that we just found before. I just went through VScode and deleted the comment manually. To be fair, I figured he just wanted to show us what it would return if the comment was no longer there. It turns out he wanted us to use either `.splice` or `.slice` to delete the comment via new code (which makes more sense for this exercise) and then have us access the new array without that specific comment in it. So...yeah...I didn't get to that point because I just deleted it manually. But I did go back and coded along with him to see how that would be possible with new lines of code.
So there it is. Array Cardio Day 2. I'm relieved to know that there isn't a Day 3 of this. That isn't me saying that I couldn't use more practice with arrays and how you can interact with them. It's just as far as this course has gone these were probably the least fun so far. Well be on the lookout for the next lesson I will be covering, hopefully it will be out either this week or early next week since I will have more time! Regardless I hope you're ready for JavaScript30: Fun With HTML5 Canvas!
| virtualsobriety |
1,917,648 | How we fixed the app downtime issue in NeetoDeploy | We have a new blog on: How we fixed the app downtime issue in NeetoDeploy. NeetoDeploy is an... | 0 | 2024-07-09T17:20:35 | https://dev.to/tsudhishnair/how-we-fixed-the-app-downtime-issue-in-neetodeploy-3l9b | webdev, devops, programming | We have a new blog on: How we fixed the app downtime issue in NeetoDeploy.
NeetoDeploy is an alternative to Heroku. At Neeto, we are building 20+ applications, and most of them are running in neetoDeploy. 🔥
Learn more about the 520 response code and how we fixed the app downtime issue. 👀
Read more here: https://www.bigbinary.com/blog/how-we-fixed-app-down-time-in-neeto-deploy | tsudhishnair |
1,917,673 | Recommended Project: 'Grouping Employees by Phone Number' | The article is about a recommended Python programming project called "Grouping Employees by Phone Number" offered by LabEx. It highlights the project's focus on developing skills in file handling, data processing, and CSV file management. The article provides an overview of the key learning objectives, including working with CSV files, implementing data grouping logic, and managing files and folders programmatically. It emphasizes the practical nature of the project and its potential to enhance the reader's Python expertise and contribute to their professional portfolio. The article encourages readers to enroll in the project and take advantage of the structured learning experience to become skilled Python programmers. | 27,678 | 2024-07-09T17:28:55 | https://dev.to/labex/recommended-project-grouping-employees-by-phone-number-4b1a | labex, programming, course, python |
Are you looking to enhance your Python programming skills and gain practical experience in file handling, data processing, and CSV file management? If so, the [Grouping Employees by Phone Number project](https://labex.io/courses/project-personnel-grouping) offered by LabEx is an excellent choice for you.
This hands-on project challenges you to develop a program that groups employees based on the last digit of their phone numbers and saves the groups to separate CSV files. By completing this project, you will not only learn valuable technical skills but also demonstrate your ability to tackle real-world problems using Python.
## Project Overview
In this project, you will embark on a journey to explore the following key aspects of Python programming:
### 1. File Handling
You will learn how to work with CSV files, including reading, processing, and writing data to new files. This skill is essential for managing and manipulating structured data in a variety of applications.
### 2. Data Processing
The core of this project involves grouping employees based on the last digit of their phone numbers. You will develop the logic to efficiently sort and organize the data, showcasing your problem-solving abilities.
### 3. File and Folder Management
As part of the project, you will create and manage files and folders programmatically, demonstrating your understanding of file system operations in Python.
## Project Objectives and Achievements
By successfully completing this [Grouping Employees by Phone Number project](https://labex.io/courses/project-personnel-grouping), you will be able to:
- Understand the fundamentals of working with CSV files in Python
- Develop skills in data processing and grouping
- Demonstrate your ability to create and manage files and folders programmatically
- Apply your Python programming knowledge to a real-world problem
Upon completion, you will have a tangible project to showcase your skills and contribute to your professional portfolio, making you an attractive candidate for future opportunities.
## Get Started Today
If you're ready to embark on an exciting journey to enhance your Python programming skills, [enroll in the 'Grouping Employees by Phone Number' project](https://labex.io/courses/project-personnel-grouping) today. This project offers a structured learning experience, guided instructions, and the opportunity to put your newfound knowledge into practice.
Don't miss this chance to level up your Python expertise and showcase your problem-solving abilities. Join the LabEx community and start your journey towards becoming a skilled Python programmer.
## LabEx: An Immersive Coding Learning Experience
LabEx is a unique online learning platform that offers an exceptional coding education experience. At the heart of LabEx's approach is the integration of interactive Playground environments, where learners can actively practice and apply the concepts they've learned.
Each LabEx course is designed with step-by-step tutorials, making it an ideal choice for beginners. These structured lessons provide automatic verification at every step, allowing learners to receive immediate feedback on their progress and understanding. This immediate feedback helps learners identify areas for improvement and reinforces their learning.
Furthermore, LabEx's AI-powered learning assistant offers invaluable support throughout the learning journey. This assistant provides code error correction, concept explanations, and personalized guidance, ensuring that learners receive the assistance they need to overcome challenges and deepen their understanding of the material.
By combining interactive Playground environments, step-by-step tutorials, and AI-driven support, LabEx creates an immersive and effective coding learning experience. Whether you're a beginner or an experienced programmer, LabEx's innovative approach can help you develop and refine your skills, setting you up for success in the dynamic world of technology.
---
## Want to Learn More?
- 🌳 Explore [20+ Skill Trees](https://labex.io/learn)
- 🚀 Practice Hundreds of [Programming Projects](https://labex.io/projects)
- 💬 Join our [Discord](https://discord.gg/J6k3u69nU6) or tweet us [@WeAreLabEx](https://twitter.com/WeAreLabEx) | labby |
1,917,675 | Skillcertpro Review? Is it any good for Azure & AWS? | Below post is based on my Experience with AZ-104, SC-900, AWS Solutions Architect... | 0 | 2024-07-09T17:33:36 | https://dev.to/bren67/skillcertpro-review-is-it-any-good-for-azure-aws-24ji | skillcertpro | Below post is based on my Experience with AZ-104, SC-900, AWS Solutions Architect exams.
**Comprehensive Coverage of Azure and AWS Certifications**
Skillcertpro offers a wide range of resources for various Azure and AWS certifications. Whether you’re preparing for the AZ-104 (Microsoft Azure Administrator), AZ-204 (Microsoft Azure Developer Associate), or the AWS Certified Solutions Architect - Associate, Skillcertpro has you covered. Their practice exams are designed to mimic the actual test environment, which helps in getting a feel of the real exam.
**Quality of Practice Tests**
The practice tests provided by Skillcertpro are of high quality. The questions are not just about rote memorization but are designed to test your understanding of the concepts. They include:
**Multiple-Choice Questions**: These questions are similar to what you would encounter in the actual exam. They cover a wide range of topics and are updated regularly to reflect the latest exam patterns.
Drag-and-Drop Questions: These types of questions test your practical knowledge and ability to apply concepts in real-world scenarios. Skillcertpro includes these in their practice tests to ensure you’re well-prepared.
**Scenario-Based Questions**: Real-world scenarios are a significant part of cloud certifications. Skillcertpro’s scenario-based questions help you think critically and apply your knowledge to solve problems.
**Detailed Explanations and Exam Notes**
One of the standout features of Skillcertpro is the detailed explanations provided for each question. These explanations help you understand why a particular answer is correct and why the other options are not. This deepens your understanding and prepares you better for the exam.
The exam notes are another valuable resource. They condense the most important topics and concepts into easily digestible points, making last-minute revisions much more manageable.
**Regular Updates**
The cloud landscape is constantly changing, and certification exams are frequently updated to reflect these changes. Skillcertpro stays on top of these updates, ensuring that their practice tests and materials are current. This is crucial for anyone preparing for an exam, as outdated materials can lead to a lot of confusion and misinformation.
**Realistic Test Environment**
Skillcertpro’s practice exams are designed to simulate the actual test environment. This includes timed exams and a similar interface to what you will encounter on exam day. This helps in managing time effectively and reduces anxiety on the day of the actual exam.
**Conclusion**
Based on my experience, Skillcertpro is a fantastic resource for anyone preparing for Azure and AWS certifications. The practice tests are comprehensive, well-structured, and updated regularly. The detailed explanations and realistic test environment make it a valuable tool in your preparation arsenal.
Whether you’re a beginner or someone looking to advance their career with a new certification, Skillcertpro can provide the edge you need to pass your exams with confidence. | bren67 |
1,917,676 | Development Made Easy for Lazy and Productive Devs - Get Code Snippets for Full or Basic Props for Native or Expo Components | While building my project (Quotix), which I'm using to learn and apply my knowledge in Mobile... | 0 | 2024-07-09T17:39:11 | https://dev.to/cre8stevedev/development-made-easy-for-lazy-and-productive-devs-get-code-snippets-for-full-or-basic-props-for-native-or-expo-components-2c85 | vscode, extensions, reactnative, mobile | While building my project (Quotix), which I'm using to learn and apply my knowledge in Mobile Development using Expo (React Native Framework), I sometimes have to:
1. Jump back again to the docs
2. Search for a particular component
3. Take note of the props that suit my needs
4. Hop back to the IDE
Phew! I'm thrilled to share that I've just published my first VSCode extension on the Marketplace (React Native and Expo Code Snippets). 🎉
## Motivation
As a newcomer to React Native with Expo, I found it tiring to constantly switch between my editor and the documentation to check component props. This inspired me to create an extension that streamlines this process.
## The Game Changer for me!
With my extension, developers can simply type _exp or _rn to access a list of code snippets, including basic and full props for components (React Native or Expo-specific). It's a fantastic way to enhance productivity and keep the development flow uninterrupted. 💡💻
With more than 70+ (and counting) snippets for many of the components, or implementations for (ContextApi, Location, Camera, Permissions), now you can speed up your development process. No need to try to remember the props; just type _rn or _exp for IntelliSense to trigger the component you want, and you pick out what you need and toss out what you don't.
## Get the Extension Now and Try it out
https://marketplace.visualstudio.com/items?itemName=Cre8steveDev.react-native-and-expo-code-snippets&ssr=false#review-details
If you're a React Native or Expo Developer, you will find this extension useful, as I have too.
## Wanna Try building your Own Extension?
If you're feeling adventurous and would like to create productivity-aiding tools for your development environment. It's quite easy.
1. Install the `Yeoman` and `VSCode Extension Generator`
```bash
npm install -g yo generator-code
```
2. Generate the extension project
```bash
yo code
```
Follow the prompt to choose the type of project you want to work on.
3. Define your snippets in the `snippets.code-snippets` file using the snippet language, kindda like json (you can look up the repository for the extension to get an idea of how it's done and the general project structure @ https://github.com/Cre8steveDev/React-Native-and-Expo-Code-Snippets
Learning Resource:
1. https://code.visualstudio.com/api/language-extensions/snippet-guide
2. https://code.visualstudio.com/api/working-with-extensions/publishing-extension
| cre8stevedev |
1,917,762 | What was your win this week? | My repo on GitHub got 1300 stars & it was featured on GitHub trending! | 0 | 2024-07-09T19:38:25 | https://dev.to/sheru/what-was-your-win-this-week-477j | weeklyretro | My repo on GitHub got 1300 stars & it was featured on GitHub trending! | sheru |
1,917,679 | Understanding the sizeof Operator in C++: A Comprehensive Guide | Wassup guys! I recently published a YouTube tutorial on the sizeof operator in C++, and I wanted to... | 0 | 2024-07-09T17:45:39 | https://dev.to/kevinbjorv/understanding-the-sizeof-operator-in-c-a-comprehensive-guide-58nl | cpp, c, tutorial, programming | Wassup guys!
I recently published a YouTube tutorial on the sizeof operator in C++, and I wanted to share some insights and gems from the video here. You can watch the full tutorial [here](https://www.youtube.com/watch?v=DuiCjk2ksfc&t=4s)
What is the sizeof Operator?
The sizeof operator in C++ is a compile-time operator that returns the size of a variable or data type in bytes. This can be incredibly useful for understanding how much memory your variables and structures are consuming.
Key Points Covered in the Tutorial:
Basic Usage:
```
`int a;
std::cout << "Size of int: " << sizeof(a) << " bytes" << std::endl;
This prints the size of an integer variable.`
```
Using sizeof with Data Types:
```
`std::cout << "Size of double: " << sizeof(double) << " bytes" << std::endl;
You can directly use sizeof with data types to get their size.`
```
Arrays and sizeof:
```
`int arr[10];
std::cout << "Size of array: " << sizeof(arr) << " bytes" << std::endl;
This returns the total size of the array (number of elements multiplied by the size of each element).`
```
Pointers vs. Arrays:
```
`int* ptr;
std::cout << "Size of pointer: " << sizeof(ptr) << " bytes" << std::endl;
It's crucial to understand the difference in size between pointers and the arrays they may point to.`
```
Best Practices:
Using sizeof with Structs and Classes:
```
`struct MyStruct {
int a;
double b;
char c;
};
std::cout << "Size of MyStruct: " << sizeof(MyStruct) << " bytes" << std::endl;`
```
This helps you understand the memory layout of your custom data types, which is critical for performance tuning and debugging.
Alignment and Padding:
The sizeof operator reveals the effects of alignment and padding on the size of structs and classes. Understanding this can help optimize memory usage.
```
`struct MyPackedStruct {
char a;
int b;
} __attribute__((packed));
std::cout << "Size of MyPackedStruct: " << sizeof(MyPackedStruct) << " bytes" << std::endl;`
```
Using sizeof with Dynamic Memory:
Be cautious when using sizeof with dynamically allocated memory, as it only returns the size of the pointer, not the allocated memory.
```
`int* dynamicArray = new int[10];
std::cout << "Size of dynamicArray pointer: " << sizeof(dynamicArray) << " bytes" << std::endl;`
```
Common Pitfalls:
Misunderstanding sizeof with Functions:
```
`void func(int arr[10]) {
std::cout << "Size of arr inside function: " << sizeof(arr) << " bytes" << std::endl;
}`
```
Inside functions, arrays decay to pointers, so sizeof will not return the size of the original array.
Using sizeof with Expressions:
```
std::cout << "Size of expression: " << sizeof(1 + 2.0) << " bytes" << std::endl;
```
This will return the size of the resulting type of the expression.
Conclusion
Understanding the sizeof operator is fundamental for mastering C++. It not only helps in efficient memory management but also deepens your understanding of how C++ manages data. For a detailed explanation and more examples, check out my YouTube tutorial.
Feel free to leave comments and questions below. Happy coding!
Check out my full video here: https://www.youtube.com/watch?v=DuiCjk2ksfc&t=4s | kevinbjorv |
1,917,680 | Getting Started with Vanilla JavaScript: Setting Up Your Development Environment | This simple guide will walk you through how to set up your development environment, to make working... | 0 | 2024-07-09T17:54:40 | https://dev.to/buchilazarus4/getting-started-with-vanilla-javascript-setting-up-your-development-environment-2od5 | news, beginners, javascript, codenewbie | This simple guide will walk you through how to set up your development environment, to make working with JavaScript smooth and interactive. The setup will use a simple folder structure with an HTML document and an external JavaScript file. This way, you can code along with the guide, write JavaScript in a separate file, and see your output in the browser console. This setup is pretty much how things work in the real world of web development. Let's dive in!
#### Why Use an External JavaScript File?
Using an external JavaScript file has several advantages:
- **Organization:** It keeps your HTML and JavaScript code separate, making your files cleaner and easier to read.
- **Reusability:** You can use the same JavaScript file across multiple HTML files.
- **Maintainability:** It's easier to update your JavaScript code without modifying your HTML file.
- **Collaboration:** Working with others becomes easier as different team members can work on HTML and JavaScript files simultaneously.
#### Step-by-Step Guide to Setting Up Your Development Environment
#### 1. Create a New Folder for Your Project
Start by creating a new folder on your computer where you'll store your project files. Name the folder something like `js-tutorial`.
#### 2. Create a New HTML File
Inside your project folder (`js-tutorial`), create a new HTML file. Name it something like `index.html`.
#### 3. Create a New JavaScript File
Still inside your project folder (`js-tutorial`), create a new JavaScript file. Name it something like `script.js`.
#### 4. Set Up the Basic HTML Structure
Open your `index.html` file in a text editor and set up a basic HTML structure. Link the external JavaScript file using the `<script>` tag with the `src` attribute:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Hello World!</title>
</head>
<body>
<h1>Welcome to JavaScript Functions Guide</h1>
<script src="script.js"></script>
</body>
</html>
```
Save the `index.html` file after adding this content.
#### 5. Add JavaScript Code to Your JavaScript File
Open your `script.js` file in the same text editor and add some JavaScript code:
```javascript
console.log("Hello, World!");
```
Save the `script.js` file after adding the code.
#### 6. Open the HTML File in Your Browser
Now, open the `index.html` file in your preferred web browser. You can do this by double-clicking the file or dragging it into an open browser window.
#### 7. Access the Browser Console
To see the output of your JavaScript code, you need to access the browser console. Follow these steps based on your browser:
**For Google Chrome:**
- **Windows/Linux:** Press `Ctrl + Shift + I` or `F12`.
- **Mac:** Press `Cmd + Option + I`.
Click on the **"Console"** tab.
**For Mozilla Firefox:**
- **Windows/Linux:** Press `Ctrl + Shift + K` or `F12`.
- **Mac:** Press `Cmd + Option + K`.
Click on the **"Console"** tab.
**For Microsoft Edge:**
- **Windows:** Press `Ctrl + Shift + I` or `F12`.
- **Mac:** Press `Cmd + Option + I`.
Click on the **"Console"** tab.
**For Safari:**
- **Mac:** Press `Cmd + Option + I` or enable the **"Develop"** menu in **"Preferences"** under the **"Advanced"** tab. Then, select **"Show JavaScript Console"**.
#### 8. See the Output
With your `index.html` file open in the browser and the console open, you should see `Hello, World!` and `Hello, World!` displayed in the console. This confirms that your setup is working perfectly!
#### 9. Start Coding
You can now write JavaScript code inside the `script.js` file. Each time you save the file and refresh the browser, you'll see the output in the console.
You're all set! Happy coding!
| buchilazarus4 |
1,917,683 | Today topics | A post by Sathish Murugan | 0 | 2024-07-09T18:02:54 | https://dev.to/sathish_murugan_973523127/today-topics-3bai | sathish_murugan_973523127 | ||
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However, concerns regarding its safety have arisen, particularly pertaining to the purchase of “verified” accounts through Cash App. This raises questions about the security of Cash App’s verification process.\n\nUnfortunately, the answer is negative, as buying such verified accounts entails risks and is deemed unsafe. Therefore, it is crucial for everyone to exercise caution and be aware of potential vulnerabilities when using Cash App. How To Buy Verified Cash App Accounts.\n\nCash App has emerged as a widely embraced platform for purchasing Instagram Followers using PayPal, catering to a diverse range of users. This convenient application permits individuals possessing a PayPal account to procure authenticated Instagram Followers.\n\nLeveraging the Cash App, users can either opt to procure followers for a predetermined quantity or exercise patience until their account accrues a substantial follower count, subsequently making a bulk purchase. 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Trust your intuition; skepticism towards deals that appear overly advantageous or sellers who raise red flags is warranted. It is always wise to prioritize caution and explore alternative avenues if uncertainties arise.\n\nConclusion\nEnhance your online financial transactions with verified Cash App accounts, a secure and convenient option for all individuals. By purchasing these accounts, you can access exclusive features, benefit from higher transaction limits, and enjoy enhanced protection against fraudulent activities. Streamline your financial interactions and experience peace of mind knowing your transactions are secure and efficient with verified Cash App accounts.\n\nChoose a trusted provider when acquiring accounts to guarantee legitimacy and reliability. In an era where Cash App is increasingly favored for financial transactions, possessing a verified account offers users peace of mind and ease in managing their finances. Make informed decisions to safeguard your financial assets and streamline your personal transactions effectively.\n\nContact Us / 24 Hours Reply\nTelegram:dmhelpshop\nWhatsApp: +1 (980) 277-2786\nSkype:dmhelpshop\nEmail:dmhelpshop@gmail.com" | rarestjunk |
1,917,685 | Talk with You Series #1 | **cover image mirrors mood at the moment of posting Wanna start with the thoughts, that for a while,... | 0 | 2024-07-09T18:10:20 | https://dev.to/maxisbusy/talk-with-you-series-1-2931 | python, dsa, matrix, learning | **cover image mirrors mood at the moment of posting
Wanna start with the thoughts, that for a while, I do have a habit to write down challenges and their potential solutions I used to face on a daily basis, whether it was part of my job or free time activities.
Starting from this post, I've decided to introduce "Talk with You" series, where I'd post them in here (at least for now, at most once in few days) to spot them out to the public.
On one hand now I'll glimpse in here from time to time instead of my well structured notes to revamp some information and DevCommunity gonna handle storage, navigation in ascending order and all the other stuff, on another one I believe the things I write here might find the audience not on my behalf only. Fasten, let's kick off.
## Count Occurrences
Quite often working with DS u need to count an amount of occurrences of values and afterwords to query those in an efficient manner, preferably Time O(1).
Obviously, you might think of creating HashTable and then traverse DS, populating the HashTable. That's true and might look as:
```python
iterable = [...]
hashtable = {}
for value in iterable:
hashtable[value] = hashtable.get(value, 0) + 1
```
Today I faced an alternative approach which would perfectly work on lists of digits avoiding usage of HashTable (sometimes it might be a necessity).
The idea behind is firstly to get the maximum value from list and create a new list of length of the maximum value, which will be used as indices mapping.
```python
list_ = [1, 1, 2, 3]
max_ = max(list_)
indices = [0] * max_ # [0, 0, 0, 0]
```
Now, lets' traverse original list and map occurrence of each value in indices list.
```python
1. iteration
[1, 1, 2, 3] # list
|
[0, 1, 0, 0] # indices
2. iteration
[1, 1, 2, 3] # list
|
[0, 2, 0, 0] # indices
3. iteration
[1, 1, 2, 3] # list
|
[0, 2, 1, 0] # indices
4. iteration
[1, 1, 2, 3] # list
|
[0, 2, 1, 1] # indices
```
What just happened. Well, basically, we took value from original list and used it as index in our indices list (and incremented value at index).
Now if we would like to represent our results using mapping list, we might say, there are 0 zero-s because at index 0 we have value 0, at index 1 we do have value of 2, meaning there are 2 one-s, at index 2 we have value of 1, meaning there are 1 two-s, etc.
## Mirror Elements in Matrix
Even though holding 2 degrees BSc and MSc, when I find out a new math trick, I'm still getting the feelings of fascinating, aka "gosh, that's so simple and works".
Okay, back to the topic, assume you have a matrix of N*N and you need to reverse rows and columns in way to get the maximum sum of all the elements (row by row).
```
matrix 4*4
1 2 3 9
0 9 8 2
5 1 7 4
8 2 6 7
```
From the first glimpse, perhaps you even do not know where to start from. But here is the trick with mirrored elements.
```
matrix 4*4
A B B A
C D D C
C D D C
A B B A
```
The key point in here is, A in the matrix might be swapped only by another A-s. Lets image we are in the top left corner A (which is 1) and we'd like to know if there are another A (only mirrored A) which is grater. And indeed, we do have such in right upper corner (9).
Following the logic and recalling the original problem (max sum reversing rows and columns) we might conclude that in reality we do not need to perform any reverse operations, instead just look up the max value among mirrored ones. And that's it.
## Stack. Trade-off between Time and Space complexity.
Assume you've got a task to implement a stack wrapper with only 3 functionalities: (1) pop (2) push (3) get_min. You might use interface of stack for (1) pop and (2) push, however still need to implement (3) get_min. Annnd get_min() should work for O(1) Time.
Well, when I's firstly tackling the problem, I completely forgot about a trade-off, which says: "When you optimise Time performance, you probably get worse with Space and wise versa". Why it's important, cause I started thinking of optimised DS which lead me to HashTables, but I truly missed naive lists, which could work for O(1) (amortised) as well.
So I reached the point when I was creating a HashTable where I might store each state of a wrapper class ... will stop here cause "simpler is a better option" (sometimes). Let's see the implementation with additional list to store min value for every state of stack.
```python
class Wrapper:
def __init__(self, stack):
self.stack = stack
self.min = []
# Time O(1)
def pop(self):
self.stack.pop()
self.min.pop()
# Time O(1)
def push(self, value):
self.stack.push(value=value)
min_ = self.min[-1]
if value < min_:
min_ = value
self.min.append(min_)
# Time O(1)
def get_min(self):
return self.min[-1]
```
As simple as it is.
Concluding
- keep coding and developing
- remember about trade-offs and do not overcomplicate (when u are not asked) | maxisbusy |
1,917,686 | Talk with You Series #1 | **cover image mirror mood at the moment of posting Wanna start with the thoughts, that for a while,... | 0 | 2024-07-09T18:10:20 | https://dev.to/maxisbusy/talk-with-you-series-1-36de | python, dsa, matrix, learning | **cover image mirror mood at the moment of posting
Wanna start with the thoughts, that for a while, I do have a habit to write down challenges and their potential solutions I used to face on a daily basis, whether it was part of my job or free time activities.
Starting from this post, I've decided to introduce "Talk with You" series, where I'd post them in here (at least for now, at most once in few days) to spot them out to the public.
On one hand now I'll glimpse in here from time to time instead of my well structured notes to revamp some information and DevCommunity gonna handle storage, navigation in ascending order and all the other stuff, on another one I believe the things I write here might find the audience not on my behalf only. Fasten, let's kick off.
## Count Occurrences
Quite often working with DS u need to count an amount of occurrences of values and afterwords to query those in an efficient manner, preferably Time O(1).
Obviously, you might think of creating HashTable and then traverse DS, populating the HashTable. That's true and might look as:
```python
iterable = [...]
hashtable = {}
for value in iterable:
hashtable[value] = hashtable.get(value, 0) + 1
```
Today I faced an alternative approach which would perfectly work on lists of digits avoiding usage of HashTable (sometimes it might be a necessity).
The idea behind is firstly to get the maximum value from list and create a new list of length of the maximum value, which will be used as indices mapping.
```python
list_ = [1, 1, 2, 3]
max_ = max(list_)
indices = [0] * max_ # [0, 0, 0, 0]
```
Now, lets' traverse original list and map occurrence of each value in indices list.
```python
1. iteration
[1, 1, 2, 3] # list
|
[0, 1, 0, 0] # indices
2. iteration
[1, 1, 2, 3] # list
|
[0, 2, 0, 0] # indices
3. iteration
[1, 1, 2, 3] # list
|
[0, 2, 1, 0] # indices
4. iteration
[1, 1, 2, 3] # list
|
[0, 2, 1, 1] # indices
```
What just happened. Well, basically, we took value from original list and used it as index in our indices list (and incremented value at index).
Now if we would like to represent our results using mapping list, we might say, there are 0 zero-s because at index 0 we have value 0, at index 1 we do have value of 2, meaning there are 2 one-s, at index 2 we have value of 1, meaning there are 1 two-s, etc.
## Mirror Elements in Matrix
Even though holding 2 degrees BSc and MSc, when I find out a new math trick, I'm still getting the feelings of fascinating, aka "gosh, that's so simple and works".
Okay, back to the topic, assume you have a matrix of N*N and you need to reverse rows and columns in way to get the maximum sum of all the elements (row by row).
```
matrix 4*4
1 2 3 9
0 9 8 2
5 1 7 4
8 2 6 7
```
From the first glimpse, perhaps you even do not know where to start from. But here is the trick with mirrored elements.
```
matrix 4*4
A B B A
C D D C
C D D C
A B B A
```
The key point in here is, A in the matrix might be swapped only by another A-s. Lets image we are in the top left corner A (which is 1) and we'd like to know if there are another A (only mirrored A) which is grater. And indeed, we do have such in right upper corner (9).
Following the logic and recalling the original problem (max sum reversing rows and columns) we might conclude that in reality we do not need to perform any reverse operations, instead just look up the max value among mirrored ones. And that's it.
## Stack. Trade-off between Time and Space complexity.
Assume you've got a task to implement a stack wrapper with only 3 functionalities: (1) pop (2) push (3) get_min. You might use interface of stack for (1) pop and (2) push, however still need to implement (3) get_min. Annnd get_min() should work for O(1) Time.
Well, when I's firstly tackling the problem, I completely forgot about a trade-off, which says: "When you optimise Time performance, you probably get worse with Space and wise versa". Why it's important, cause I started thinking of optimised DS which lead me to HashTables, but I truly missed naive lists, which could work for O(1) (amortised) as well.
So I reached the point when I was creating a HashTable where I might store each state of a wrapper class ... will stop here cause "simpler is a better option" (sometimes). Let's see the implementation with additional list to store min value for every state of stack.
```python
class Wrapper:
def __init__(self, stack):
self.stack = stack
self.min = []
# Time O(1)
def pop(self):
self.stack.pop()
self.min.pop()
# Time O(1)
def push(self, value):
self.stack.push(value=value)
min_ = self.min[-1]
if value < min_:
min_ = value
self.min.append(min_)
# Time O(1)
def get_min(self):
return self.min[-1]
```
As simple as it is.
Concluding
- keep coding and developing
- remember about trade-offs and do not overcomplicate (when u are not asked) | maxisbusy |
1,917,692 | OOP Simplified: Quick Factory Methods with Encapsulation, Abstraction, and Polymorphism in TypeScript | This article explores the Factory Method design pattern in TypeScript, highlighting how it uses... | 0 | 2024-07-09T18:26:05 | https://dev.to/lphill/oop-simplified-quick-factory-methods-with-encapsulation-abstraction-and-polymorphism-in-typescript-1m89 | learning, typescript, oop, patterns | This article explores the Factory Method design pattern in TypeScript, highlighting how it uses object-oriented programming (OOP) principles: encapsulation, abstraction, and polymorphism.
Currently I am deepening my understanding of design patterns by studying the [catalog from Refactoring Guru](https://refactoring.guru/design-patterns/catalog). In this article, we'll explore how to create smart home devices using the Factory Method pattern, illustrating how this approach can lead to more flexible and maintainable code.
Follow along as I post an article for each design pattern, documenting my learning journey and sharing practical examples.
## **The Factory Method Pattern**
The Factory Method pattern is a design that defines an interface for creating objects while allowing subclasses to decide which classes to instantiate. TypeScript’s powerful type-checking and higher-order functions make it an excellent choice for implementing this pattern, resulting in robust and maintainable code.
## **Example: Smart Home Device Factory**
Imagine a smart home ecosystem. We'll create a factory function to generate objects for various smart home devices, all adhering to a unified interface.
## **Defining the Interface**
The `SmartDevice` interface ensures that all smart devices have an operate method.
```
interface SmartDevice {
operate: () => string;
}
```
## **Creating Factory Functions**
Here's how `createLight` and `createThermostat` functions produce objects conforming to the `SmartDevice` interface.
```
const createLight = (): SmartDevice => {
return {
operate: () => 'Turning on the light',
};
};
const createThermostat = (): SmartDevice => {
return {
operate: () => 'Adjusting the thermostat',
};
};
```
## **Higher-Order Factory Function**
The `getDeviceFactory` function returns the appropriate factory function based on the `DeviceType`.
```
type DeviceType = 'light' | 'thermostat';
const getDeviceFactory = (type: DeviceType): (() => SmartDevice) => {
switch (type) {
case 'light':
return createLight;
case 'thermostat':
return createThermostat;
default:
throw new Error("Unsupported device type");
}
};
```
## **Instantiating Devices**
Factory functions from `getDeviceFactory` are used to create new smart device objects.
```
const lightFactory = getDeviceFactory('light');
const thermostatFactory = getDeviceFactory('thermostat');
const myLight = lightFactory();
const myThermostat = thermostatFactory();
console.log(myLight.operate()); // Outputs: Turning on the light
console.log(myThermostat.operate()); // Outputs: Adjusting the thermostat
```
## **OOP Principles Illustrated**
**Encapsulation**
Encapsulation is demonstrated by how the factory functions `createLight` and `createThermostat` manage the creation details of `SmartDevice` objects. The internal logic is hidden within each factory function, simplifying client interaction.
**Abstraction**
Abstraction is applied through the `SmartDevice` interface and the higher-order factory function `getDeviceFactory`. The interface defines a consistent contract for smart devices, and the factory function abstracts the creation process, making it easy to extend and modify.
**Polymorphism**
Polymorphism is demonstrated by handling different types of smart devices (lights and thermostats) through a single interface (SmartDevice). This consistent interface enables seamless method invocation (operate) across various device types, allowing for flexible and interchangeable usage of the smart devices.
## **Conclusion**
The Factory Method pattern highlights the power of OOP principles in creating flexible and maintainable code. Encapsulation, abstraction, and polymorphism work together to enhance system robustness, making it easier to manage and extend.
By applying these principles and patterns in your TypeScript projects, you can build scalable, efficient software systems that are easier to understand and maintain. | lphill |
1,917,693 | 100 days of python day 5 | Feeling existential about all of this. | 0 | 2024-07-09T18:26:47 | https://dev.to/myrojyn/100-days-of-python-day-5-3m92 | python, 100daysofpython | Feeling existential about all of this. | myrojyn |
1,917,694 | Run A NodeJs Application In a Docker Container | we will cover the following: 1.Installation of docker on ubuntu(AWS) 2.Containerisation of Nodejs... | 0 | 2024-07-09T18:27:33 | https://dev.to/ejay11/run-a-nodejs-application-in-a-docker-container-4d16 | devops, docker, aws, container |
we will cover the following:
1.Installation of docker on ubuntu(AWS)
2.Containerisation of Nodejs application
3.update the application
4.share the application
Perequisites
- AWS Account with EC2 access
- Basic knowledge of Docker concepts and commands
**Steps to Setup Docker Project on Ubuntu (AWS EC2 Instance)**
- Create an Ubuntu EC2 Instance
Sign in to AWS Management Console
Go to the AWS Management Console and log in with your credentials.
- Launch an EC2 Instance
Navigate to EC2 Dashboard:
Click on Services and select EC2 under Compute.
Click Launch Instance.
Choose an Ubuntu Server AMI (e.g., Ubuntu Server 20.04 LTS).
Select an Instance Type (e.g., t2.micro).
Configure Instance Details and add storage as needed.(see image below)
- Configure Security Group:
Add rules to open ports 22 (SSH), 80 (HTTP), and 3000 (Application port).
Review and Launch the instance, then SSH into the terminal.
**2.Install Docker and Docker Compose**
Run this command to install the necessary tools and packages to handle secure software installations and manage additional software repositories effectively.
Add the Docker GPG key to your system's list of trusted keys using command below
Add the Docker repository on your Ubuntu system which contains Docker packages including its dependencies, for that execute the below command:
Update the package index on your Ubuntu system and install Docker Community Edition suing commands below(Ps: To Check the Latest Version: Visit the Docker Compose Releases page and find the latest version)
Run the following command to download the latest version of docker compose (ensure you have the latest: To Check the Latest Version: Visit https://github.com/docker/compose/releases)
Set the correct permissions so that doxker-compose is executable
Run this command to verify sucessfule installation
**3.Containerization of Node.js Application**
Start docker engine and check status
Clone docker compose application:Cloning a Docker Compose application this is important because it ensures consistency, ease of setup, and portability across different environments.Run the command below to clone the application
Run ls to see cloned files
To see content in directory run comand below
Build the app container image:To build the container image, you need to create a Dockerfile. A Dockerfile is a plain text file that contains a set of instructions which Docker uses to create a container image.
In the app directory of the cloned repository, where the package.json file is located, create a file named Dockerfile
Open the Dockerfile and paste the code provided below into it.
Save and close the Dockerfile.
Run the following command to create a Dockerfile
Then, paste the following code into the Dockerfile
Change directory to the app directory
Build the container image using the following command
Start application container by running the command below.This command ensures that the Docker container runs correctly, and the application is accessible on port 3000 of your host machine
After a few seconds, open your web browser and paste the following url http://18.169.10.56:3000/ replacing your-docker-server-ip with your Docker server's public IP to view the application
you can add one or two items as seen in the image below to ensure the application is working as expected
4. **Update The Application**
To modify the app.js file follow these steps
Run the command to open the file in vi:sudo vi ~/getting-started/app/src//static/js/app.js-expected output, see image below
-search for text "NO items yet! Add one above!"
press '/' to initiate a search and then type 'No' and press 'Enter' on your keyboard, the curson will move the first occureence of the text starting with "No"
Press 'a' to enter insert mode, allowing you to edit the text starting from the next character
Change 'No items yet! Add one above! to you have no todo items yet! Add one above!
Press esc to exit insert mode, type :wq! and press enter to save chnages and close file
Use the same docker build command you used before to create an updated version of the image.
After building start a new container
The previous step failed because an existing container is already using the host’s port 3000. To resolve this issue, we need to stop and remove the old container before running the updated image:To do this run command below
Run sudo docker ps command to see the container ID of the running container
Find the container ID from the output of the previous command and stop the container by running
Remove the stopped container to free up the port
Now that the old container is stopped and removed, run the updated image
After running the updated Docker container, you might notice that the data added previously has disappeared. This is because the data stored in the container does not persist when the container is removed.
**5. Share the Application**
Go to Docker Hub and sign in with your Docker ID or create a new Docker ID if you don't have one
After signing in, click on your profile icon at the top right corner of the page and select Account Settings from the dropdown menu.
In the Account Settings page, click on Repositories in the left sidebar.
Click on the green Create Repository button.
Your repository is now created and ready to use. You will see the repository details and instructions for pushing your Docker images to this repository.
Run the command below to login to Docker Hub, make you use you replace the username with your username . When prompted for password, type your Docker Hub password
Push image to dockerhub using the command below and expected output
After pushing the image to docker hub pull image and run it as a container:Pulling Docker images and running them as containers ensures that your applications are portable, scalable, and secure. It simplifies deployment processes and enhances consistency across different environments, making Docker a powerful tool for modern software development and deployment practices
**SUMMARY**
This project involves setting up a Docker environment on an Ubuntu EC2 instance in AWS, containerizing a Node.js application, updating it, and sharing it on Docker Hub. The Node.js application runs in a Docker container, accessible via port 3000, and can be accessed and modified through commands and scripts.
Regarding data persistence, while the Docker container provides a portable and scalable environment for applications, data persistence strategies such as volume mounts or database containerization are recommended for ensuring that data remains intact across container restarts or updates. This aspect will be covered in subsequent posts or steps, focusing on maintaining data integrity and application reliability in Dockerized environments
| ejay11 |
1,917,697 | Underrated React Hook - useSyncExternalStore | Overview Discover a hidden powerhouse in the React ecosystem: the “useSyncExternalStore”... | 0 | 2024-07-09T18:37:26 | https://dev.to/starneit/underrated-react-hook-usesyncexternalstore-4igj | webdev, javascript, beginners, programming |
## Overview
Discover a hidden powerhouse in the React ecosystem: the “useSyncExternalStore” hook. This article delves into its transformative potential, challenging traditional state management paradigms. By seamlessly integrating external data sources and enhancing cross-component communication, this hook offers an unconventional yet powerful approach.
Journey with us as we demystify **useSyncExternalStore**. We’ll dissect its mechanics, unveil its benefits, and showcase practical applications through real-world examples. By the end, you’ll grasp how to wield this hook to streamline complexity, boost performance, and bring a new level of organization to your codebase.
## Usage
According to React, `useSyncExternalStore` is a React Hook that lets you subscribe to an external store. But what is an “external store” exactly ? It literally takes 2 functions:
- The `subscribe` function should subscribe to the store and return a function that unsubscribes.
- The `getSnapshot` function should read a snapshot of the data from the store.
Okay it’s might be hard to get at first. We can go into the example.
## The Demo
For our demo today, I will go into a classic application: The “Todo List”.
### The Store
First, we have to define the initial state:
```
export type Task = {
id: string;
content: string;
isDone: boolean;
};
export type InitialState = {
todos: Task[];
};
export const initialState: InitialState = { todos: [] };
```
You can see that I defined the types and then created the state that has todos as an empty array
Now is the reducer:
```
export function reducer(state: InitialState, action: any) {
switch (action.type) {
case "ADD_TASK":
const task = {
content: action.payload,
id: uid(),
isDone: false,
};
return {
...state,
todos: [...state.todos, task],
};
case "REMOVE_TASK":
return {
...state,
todos: state.todos.filter((task) => task.id !== action.payload),
};
case "COMPLETE_TASK":
const tasks = state.todos.map((task) => {
if (task.id === action.payload) {
task.isDone = !task.isDone;
}
return task;
});
return {
...state,
todos: tasks,
};
default:
return state;
}
}
```
Our reducer only has 3 actions: `ADD_TASK`, `REMOVE_TASK` and `COMPLETE_TASK`. This is the classic example of a to-do list logic.
Finally, what we are waiting for, the store:
```
let listeners: any[] = [];
function createStore(reducer: any, initialState: InitialState) {
let state = initialState;
function getState() {
return state;
}
function dispatch(action: any) {
state = reducer(state, action);
emitChange();
}
function subscribe(listener: any) {
listeners = [...listeners, listener];
return () => {
listeners = listeners.filter((l) => l !== listener);
};
}
const store = {
dispatch,
getState,
subscribe,
};
return store;
}
function emitChange() {
for (let listener of listeners) {
listener();
}
}
export const store = createStore(reducer, initialState);
```
This code snippet illustrates the creation of a simple Redux-like state management system in TypeScript. Here’s a breakdown of how it works:
1. `listeners` Array: This array holds a list of listener functions that will be notified whenever the state changes.
2. `createStore` Function: This function is responsible for creating a Redux-style store. It takes two parameters:
- `reducer`: A reducer function responsible for calculating the next state based on the current state and dispatched action.
- `initialState`: The initial state of the application.
3. `state`: This variable holds the current state of the application.
4. `getState` Function: Returns the current state.
5. `dispatch` Function: Accepts an action object, passes it to the reducer along with the current state, updates the state with the result, and then calls the emitChange function to notify listeners about the state change.
6. `subscribe` Function: Accepts a listener function, adds it to the listeners array, and returns a cleanup function that can be called to remove the listener.
7. `store` Object: The created store object holds references to the dispatch, getState, and subscribe functions.
8. `emitChange` Function: Iterates through the listeners array and invokes each listener function, notifying them of a state change.
At the end of the code, a `store` is created using the `createStore` function, with a given reducer and initial state. This store can now be imported and used in other parts of the application to manage and control the state.
It’s important to note that this code provides a simplified implementation of a state management system and lacks some advanced features and optimizations found in libraries like Redux. However, it serves as a great starting point to understand the basic concepts of state management using listeners and a reducer function.
To use the `useSyncExternalStore` hook. We can get the state like this:
```
const { todos } = useSyncExternalStore(store.subscribe, store.getState);
```
With this hook call, we can access the store globally and dynamically, while maintain the readability and maintainability
## Pros and Cons
The “useSyncExternalStore” hook presents both advantages and potential drawbacks in the context of state management within a React application:
### Pros:
1. **Seamless Integration with External Sources**: The hook enables effortless integration with external data sources, promoting a unified approach to state management. This integration can simplify the handling of data from various origins, enhancing the application’s cohesion.
2. **Cross-Component Communication**: “useSyncExternalStore” facilitates efficient communication between components, streamlining the sharing of data and reducing the need for complex prop drilling or context management.
3. **Performance Improvements**: By centralizing state management and minimizing the propagation of state updates, this hook has the potential to optimize rendering performance, resulting in a more responsive and efficient application.
4. **Simplicity and Clean Code**: The hook’s abstracted API can lead to cleaner and more organized code, making it easier to understand and maintain, particularly in large-scale applications.
5. **Reduced Boilerplate**: “useSyncExternalStore” may reduce the need for writing redundant code for state management, providing a concise and consistent way to manage application-wide state.
### Cons:
1. **Learning Curve**: Developers unfamiliar with this hook might experience a learning curve when transitioning from more established state management solutions. Adapting to a new approach could initially slow down development.
2. **Customization Limitations**: The hook’s predefined functionalities might not align perfectly with every application’s unique requirements. Customizing behavior beyond the hook’s capabilities might necessitate additional workarounds.
3. **Potential Abstraction Overhead**: Depending on its internal mechanics, the hook might introduce a slight overhead in performance or memory usage compared to more optimized solutions tailored specifically for the application’s needs.
4. **Community and Ecosystem**: As an underrated or lesser-known hook, “useSyncExternalStore” might lack a well-established community and comprehensive ecosystem, potentially resulting in fewer available resources or third-party libraries.
5. **Compatibility and Future Updates**: Compatibility with future versions of React and potential updates to the hook itself could be points of concern. Ensuring long-term support and seamless upgrades may require extra diligence.
## Conclusion
In summary, `useSyncExternalStore` offers a unique approach to state management, emphasizing seamless integration and cross-component communication. While it provides several benefits, such as improved performance and simplified code, developers should carefully evaluate its compatibility with their project’s requirements and consider the potential learning curve and limitations.
| starneit |
1,917,698 | Lists | The List interface extends the Collection interface and defines a collection for storing elements in... | 0 | 2024-07-09T18:39:26 | https://dev.to/paulike/lists-3e1p | java, programming, learning, beginners | The **List** interface extends the **Collection** interface and defines a collection for storing elements in a sequential order. To create a list, use one of its two concrete classes: **ArrayList** or **LinkedList**.
We used **ArrayList** to test the methods in the **Collection** interface in the preceding sections. Now we will examine **ArrayList** in more depth. We will also introduce another useful list, **LinkedList**, in this section.
## The Common Methods in the List Interface
**ArrayList** and **LinkedList** are defined under the **List** interface. The **List** interface extends **Collection** to define an ordered collection with duplicates allowed. The **List** interface adds position-oriented operations, as well as a new list iterator that enables the user to traverse the list bidirectionally. The methods introduced in the **List** interface are shown in Figure below.
The **add(index, element)** method is used to insert an element at a specified index, and the **addAll(index, collection)** method to insert a collection of elements at a specified index. The **remove(index)** method is used to remove an element at the specified index from the list. A new element can be set at the specified index using the **set(index, element)** method.
The **indexOf(element)** method is used to obtain the index of the specified element’s first occurrence in the list, and the **lastIndexOf(element)** method to obtain the index of its last occurrence. A sublist can be obtained by using the **subList(fromIndex, toIndex)** method.
The **listIterator()** or **listIterator(startIndex)** method returns an instance of **ListIterator**. The **ListIterator** interface extends the **Iterator** interface to add bidirectional traversal of the list. The methods in **ListIterator** are listed in Figure below.
The **add(element)** method inserts the specified element into the list. The element is inserted immediately before the next element that would be returned by the **next()** method defined in the **Iterator** interface, if any, and after the element that would be returned by the **previous()** method, if any. If the list doesn’t contain any elements, the new element becomes the sole element in the list. The **set(element)** method can be used to replace the last element returned by the **next** method or the **previous** method with the specified element.
The **hasNext()** method defined in the **Iterator** interface is used to check whether the iterator has more elements when traversed in the forward direction, and the **hasPrevious()** method to check whether the iterator has more elements when traversed in the backward direction.
The **next()** method defined in the **Iterator** interface returns the next element in the iterator, and the **previous()** method returns the previous element in the iterator. The **nextIndex()** method returns the index of the next element in the iterator, and the **previousIndex()** returns the index of the previous element in the iterator.
The **AbstractList** class provides a partial implementation for the **List** interface. The **AbstractSequentialList** class extends **AbstractList** to provide support for linked lists.
## The ArrayList and LinkedList Classes
The **ArrayList** class and the **LinkedList** class are two concrete implementations of the **List** interface. **ArrayList** stores elements in an array. The array is dynamically created. If the capacity of the array is exceeded, a larger new array is created and all the elements from the current array are copied to the new array. **LinkedList** stores elements in a _linked list_. Which of the two classes you use depends on your specific needs. If you need to support random access through an index without inserting or removing elements at the beginning of the list, **ArrayList** offers the most efficient collection. If, however, your application requires the insertion or deletion of elements at the beginning of the list, you should choose **LinkedList**. A list can grow or shrink dynamically. Once it is created, an array is fixed. If your application does not require the insertion or deletion of elements, an array is the most efficient data structure.
**ArrayList** is a resizable-array implementation of the **List** interface. It also provides methods for manipulating the size of the array used internally to store the list, as shown in Figure below. Each ArrayList instance has a capacity, which is the size of the array used to store the elements in the list. It is always at least as large as the list size. As elements are added to an **ArrayList**, its capacity grows automatically. An **ArrayList** does not automatically shrink. You can use the **trimToSize()** method to reduce the array capacity to the size of the list. An **ArrayList** can be constructed using its no-arg constructor, **ArrayList(Collection)**, or **ArrayList(initialCapacity)**.
**LinkedList** is a linked list implementation of the **List** interface. In addition to implementing the **List** interface, this class provides the methods for retrieving, inserting, and removing elements from both ends of the list, as shown in Figure below. A **LinkedList** can be constructed using its no-arg constructor or **LinkedList(Collection)**.
The code below gives a program that creates an array list filled with numbers and inserts new elements into specified locations in the list. The example also creates a linked list from the array list and inserts and removes elements from the list. Finally, the example traverses the
list forward and backward.
`A list of integers in the array list:
[10, 1, 2, 30, 3, 1, 4]
Display the linked list forward:
green 10 red 1 2 30 3 1
Display the linked list backward:
1 3 30 2 1 red 10 green`
A list can hold identical elements. Integer **1** is stored twice in the list (lines 8, 11). **ArrayList** and **LinkedList** operate similarly. The critical difference between them pertains to internal implementation, which affects their performance. **ArrayList** is efficient for retrieving elements and **LinkedList** is efficient for inserting and removing elements at the beginning of the list. Both have the same performance for inserting and removing elements in the middle or at the end of the list.
The **get(i)** method is available for a linked list, but it is a time-consuming operation. Do not use it to traverse all the elements in a list as shown in (a). Instead you should use an iterator as shown in (b). Note that a foreach loop uses an iterator implicitly.
Java provides the static **asList** method for creating a list from a variable-length list of arguments. Thus you can use the following code to create a list of strings and a list of integers:
`List<String> list1 = Arrays.asList("red", "green", "blue");
List<Integer> list2 = Arrays.asList(10, 20, 30, 40, 50);`
| paulike |
1,917,699 | State Management with RxJS and React | Introduction Building big web apps can be tricky, especially when you have lots of... | 0 | 2024-07-09T18:42:13 | https://dev.to/starneit/state-management-with-rxjs-and-react-32km | webdev, javascript, beginners, programming |
## Introduction
Building big web apps can be tricky, especially when you have lots of different pieces of information to keep track of. But don’t worry, RxJS is here to help! It’s like a really cool tool that helps you manage all your data in one place.
With RxJS, you can create these things called “streams of data” that different parts of your app can use. It’s like a big river flowing through your app, keeping everything connected and in sync.
In this article, we’ll show you how to use RxJS to build web apps that are really easy to manage and work great. By the end of the article, you’ll know how to use RxJS to manage all your data and build even bigger and better web apps!
## Why RxJS for State Management ?
Hey, do you ever get confused when you’re building a big web app and you have lots of different pieces of information to keep track of? That’s where RxJS comes in! It’s like a really cool library that helps you manage all your data in one place.
With RxJS, you can create streams of data that different parts of your app can use. It’s kind of like a river flowing through your app, keeping everything connected and in sync.
RxJS also helps you break down your app into smaller pieces, which is like having different rooms in your house for different stuff. That way, it’s easier to keep everything organized and find what you need.
Overall, RxJS is a great tool for managing data in big web apps. Whether you’re building a simple app or a really big one, RxJS can help you keep everything under control!
## A to-do list example
The easiest way to apply a new technology or a new proof of concept is to make a to-do list.
### The Store:
```
const subject = new Subject();
const initialState: Task[] = [];
let state = initialState;
export const todoStore = {
init: () => {
subject.next(state);
},
subscribe: (setState: any) => {
subject.subscribe(setState);
},
addTask: (content: string) => {
const task = {
content,
id: uid(),
isDone: false,
};
state = [...state, task];
subject.next(state);
},
removeTask: (id: string) => {
const tasks = state.filter((task) => task.id !== id);
state = tasks;
subject.next(state);
},
completeTask: (id: string) => {
const tasks = state.map((task) => {
if (task.id === id) {
task.isDone = !task.isDone;
}
return task;
});
state = tasks;
subject.next(state);
},
initialState,
};
```
This code defines a simple store for managing a to-do list using RxJS. The store is implemented using a `Subject` and provides methods for adding, removing, and completing tasks.
The `init` function initializes the store by publishing the current state to the subject using `subject.next(state)`. This function is typically called when the app is first loaded to ensure that the store is up to date.
The `subscribe` function allows components to subscribe to changes in the store. When the store is updated, the `setState` function passed to `subscribe` will be called with the updated state. This function is typically used by components that need to display the current state of the store.
Overall, `init` and `subscribe` are two important functions in this code that enable developers to manage the state of a to-do list using RxJS.
### Usage:
It’s very easy to implement this kind of state management, just do this one the highest level:
```
const [tasks, setTasks] = useState<Task[]>([]);
useEffect(() => {
todoStore.subscribe(setTasks);
todoStore.init();
});
```
This code uses React hooks to subscribe to and initialize a store that manages a to-do list using RxJS.
The `useState` hook creates a state variable named `tasks` and a function named `setTasks` for updating that state. The `[]` argument passed to `useState` sets the initial value of `tasks` to an empty array.
The `useEffect` hook is used to subscribe to and initialize the `todoStore`. The `todoStore.subscribe(setTasks)` line subscribes the `setTasks` function to changes in the store. This means that whenever the store is updated, `setTasks` will be called with the updated state, and `tasks` will be updated accordingly.
The `todoStore.init()` function initializes the store by publishing the current state to the subject using `subject.next(state)`.
## Conclusion
So that’s it! We’ve learned how to use RxJS and React to build a to-do list application. We used RxJS to manage the state of the application and React to display the current state to the user.
We saw how RxJS provides a powerful set of tools for managing state, including observables, operators, and subjects. And we also learned how to use React hooks like useState and useEffect to update the application state in real-time.
By using RxJS and React together, we’ve built a cool app that’s easy to use and maintain. And we’ve learned some really valuable skills that we can use to build even more amazing web applications in the future!
If you think the article is too obscure, check these out:
- Source Code: https://github.com/starneit/rxjs-state-poc
- Demo: https://rxjs-poc.web.app/
| starneit |
1,917,700 | Tailwind CSS Is So Much More Than Just Inline CSS | Here is why I fell in love with Tailwind and you might too. As a recent Tailwind convert, I never... | 0 | 2024-07-09T18:42:39 | https://dev.to/safdarali/tailwind-css-is-so-much-more-than-just-inline-css-358n | tailwindcss, webdev, beginners, programming | Here is why I fell in love with Tailwind and you might too.
As a recent Tailwind convert, I never thought I’d say this, but…
Tailwind is sooo cool! I want to use it in all my web projects from now on.
There, I said it.
If you’ve never used Tailwind in your web dev projects before, you probably don’t understand what all the fuss is about. At first glance, Tailwind syntax looks like a bloated mix of inline CSS, hard to reuse, and even harder to remember. Why on Earth would anyone waste their time and energy learning a syntax that resembles, but isn’t quite, normal CSS? Why would anyone install extra dependencies, add more files, and struggle to learn a new way of styling their web projects?
I was asking myself the same questions when I had to learn Tailwind for a new web project I’ve been working on. A few weeks later, I finally started to understand why Tailwind is so popular. Today, I prefer to use it in most of my projects. Here’s why:
## 1. Utility-First Approach
Tailwind CSS promotes a utility-first approach to styling, which means you use predefined classes to apply specific styles directly in your HTML. This might seem cumbersome initially, but it drastically reduces the need to write custom CSS and helps maintain consistency across your project.
## 2. Rapid Prototyping
With Tailwind, you can rapidly prototype designs by composing utilities. Instead of writing custom CSS for each new component, you can build complex layouts directly in your HTML, which speeds up the development process significantly.
## 3. Responsive Design
Tailwind's responsive design utilities make it easy to create designs that work on any screen size. You can apply different styles for different screen sizes using intuitive class names like sm:, md:, lg:, and xl:.
## 4. Customization
Tailwind is highly customizable. You can configure your own color palette, spacing scale, fonts, and more using the tailwind.config.js file. This allows you to maintain a consistent design system tailored to your brand's needs.
## 5. Performance
Tailwind CSS encourages best practices for performance. By using its built-in purge functionality, you can remove unused CSS, resulting in smaller CSS files and faster load times. This ensures that only the styles you actually use are included in your final CSS bundle.
## 6. Maintainability
Contrary to the belief that Tailwind leads to bloated HTML, it actually improves maintainability. Since the styles are applied through classes, there’s no need to dig through multiple CSS files to understand how a component is styled. This makes it easier to read and understand the codebase, especially for new developers joining the project.
## 7. Community and Ecosystem
Tailwind CSS has a vibrant community and a growing ecosystem of plugins and tools that extend its functionality. Whether you need forms, typography, or custom animations, there’s likely a Tailwind plugin that can help.
## 8. Integration
Tailwind integrates seamlessly with modern JavaScript frameworks like React, Vue, and Angular. Its utility-first approach complements the component-based architecture of these frameworks, making it easier to style components consistently.
## Conclusion
Tailwind CSS is much more than just inline CSS. It offers a powerful, utility-first approach to styling that enhances productivity, maintainability, and performance. If you haven’t tried it yet, give it a shot. You might just fall in love with it like I did.
That's all for today.
And also, share your favourite web dev resources to help the beginners here!
Connect with me:@ [LinkedIn ](https://www.linkedin.com/in/safdarali25/)and checkout my [Portfolio](https://safdarali.vercel.app/).
Explore my [YouTube ](https://www.youtube.com/@safdarali_?sub_confirmation=1)Channel! If you find it useful.
Please give my [GitHub ](https://github.com/Safdar-Ali-India) Projects a star ⭐️
Thanks for 25148! 🤗 | safdarali |
1,917,701 | Ready to Dive into React? Let's Build Your First App! | So you're ready to learn React, the powerful JavaScript library for building dynamic user interfaces!... | 0 | 2024-07-09T18:43:20 | https://dev.to/mahiya_khan_1d2dc6061abb7/ready-to-dive-into-react-lets-build-your-first-app-2j0p | webdev, beginners, javascript, react | So you're ready to learn React, the powerful JavaScript library for building dynamic user interfaces! That's awesome. But before we start building fancy components, we need a solid foundation. Let's get your first React app up and running!
**1. Node.js and npm (or yarn): Your Development Tools**
Think of Node.js as the engine that powers your React app, and npm (or yarn) as the toolbox. You need both!
* **Get Node.js:** Head to [https://nodejs.org/](https://nodejs.org/) and download the installer for your operating system. This comes with npm, the package manager you'll use to install React and other tools.
* **Verify Your Installation:** Open your terminal or command prompt and type `node -v` and `npm -v`. You should see the versions of Node.js and npm installed.
**2. Create Your React App**
Now for the fun part! Let's create a new React project using Create React App, a tool that sets up everything you need:
```bash
npx create-react-app my-react-app
```
Replace `my-react-app` with your desired project name. This command will:
* Download the necessary files.
* Install React and related dependencies.
* Create a basic app structure.
**3. Navigate into Your Project**
Once Create React App finishes, open your terminal and navigate to your project directory:
```bash
cd my-react-app
```
**4. Start the Development Server**
Let's fire up the development server to see your app in action!
```bash
npm start
```
This will usually open your default browser to `http://localhost:3000/` where you'll see the default React welcome page. Yay! You've successfully created your first React app.
**5. Explore the Files**
Open the project folder in your code editor (VS Code is a popular choice). You'll find:
* **`src` directory:** This is where your React code will live.
* **`public` directory:** This holds static assets like your HTML (`index.html`) and CSS (`index.css`).
* **`package.json`:** This file lists the dependencies of your project.
* **`README.md`:** This file contains instructions and information about the project.
**Let's Make Changes**
Now, let's make a simple change to see how React works. In the `src/App.js` file, replace the contents with:
```javascript
import React from 'react';
function App() {
return (
<div>
<h1>Hello, React!</h1>
</div>
);
}
export default App;
```
Save the file, and your browser will automatically refresh to show your new heading!
**Tips for Success**
* **Experiment!** Change the text, add more elements, and play around to see what happens.
* **Documentation is your friend:** [https://reactjs.org/](https://reactjs.org/) is a great resource for learning React.
* **Community Support:** There's a fantastic community of React developers. Don't hesitate to ask questions!
That's it! You've built your first React app. Now, the fun part begins – learning how to create interactive and dynamic user experiences with React!
| mahiya_khan_1d2dc6061abb7 |
1,917,702 | Differentiating Zustand and Redux | Overview Explore the differences between Zustand and Redux, two popular state management... | 0 | 2024-07-09T18:45:08 | https://dev.to/starneit/differentiating-zustand-and-redux-426i | react, webdev, javascript, typescript |
## Overview
Explore the differences between Zustand and Redux, two popular state management libraries in React. Efficient state management is crucial for complex web applications, and both Zustand and Redux offer unique solutions. In this article, we will explore their capabilities, application scenarios, and performance attributes. Whether you are an experienced React developer or new to state management, grasping these distinctions will enable you to make well-informed choices for your projects.
## Definitions
### Zustand:
Zustand is a lightweight state management library for React applications. It offers a simple and intuitive API, making it easy to manage and share state across components. Zustand follows a minimalist approach and leverages the React hooks system to provide reactive state updates. With its small bundle size and emphasis on performance, Zustand is ideal for smaller projects or situations where a lightweight state management solution is preferred.
### Redux:
Redux is a powerful state management library for React and other JavaScript applications. It implements the Flux architecture and utilizes a single immutable state tree, providing a predictable state management system. Redux follows strict principles of data flow, making it suitable for large-scale applications with complex state management needs. While Redux requires some boilerplate code, it offers features like middleware and time-travel debugging, which can be valuable for more extensive projects with complex state interactions.
## Why choose Zustand ?
1. Simplicity: Zustand adopts a minimalist and straightforward API, making it easier to set up and use compared to Redux. With Zustand, developers can manage state with less boilerplate code and have a more streamlined experience.
2. Lightweight: Zustand has a smaller bundle size compared to Redux. This smaller footprint is advantageous for applications that prioritize performance and loading speed, especially in scenarios where reducing bundle size is crucial.
3. React Hooks Integration: Zustand seamlessly integrates with React’s hooks system. It leverages React hooks like useReducer and useContext, providing a more native and familiar development experience for React developers.
4. Less Boilerplate Code: Zustand reduces the need for extensive boilerplate code that is often associated with Redux. This leads to a more concise and efficient codebase, which is easier to maintain and understand.
5. No Immutable State Tree: Unlike Redux, Zustand does not require developers to work with an immutable state tree. This flexibility simplifies state updates and avoids the need for deep cloning of objects, resulting in a more straightforward development process.
6. Performance: Due to its lightweight nature and streamlined approach, Zustand can offer better performance in certain scenarios compared to Redux. Smaller bundles and reduced overhead contribute to improved application speed and responsiveness.
7. Easy Learning Curve: Zustand’s simplicity and close integration with React make it more accessible for developers, particularly those who are new to state management or prefer a more straightforward approach.
## Why choose Redux
1. Established Ecosystem: Redux has a mature and well-established ecosystem with a vast community, extensive documentation, and many third-party libraries, making it a reliable choice for complex projects.
2. Predictable State Management: Redux strictly follows data flow principles, ensuring a predictable and consistent approach to managing state, making it easier to debug.
3. Time-Travel Debugging: Redux’s time-travel debugging allows developers to inspect and replay actions, aiding in understanding state changes over time.
4. Middleware Support: Redux offers robust middleware support, allowing easy integration of features like logging and asynchronous operations.
5. Centralized State: Redux promotes centralized state management, simplifying data synchronization across components in large applications.
6. Thorough Documentation: Redux has extensive documentation and a large community, providing ample learning resources and support.
7. Broad Adoption: Being widely used, Redux enjoys a large and active community with plenty of resources and community support.
## Conclusion
In conclusion, Zustand and Redux offer distinct advantages for state management. Zustand’s simplicity and lightweight nature make it ideal for smaller projects, while Redux’s mature ecosystem and predictable state management excel in larger, complex applications. The choice between the two depends on project size, complexity, and development preferences. Both libraries empower developers to create efficient and robust React applications tailored to their specific needs.
| starneit |
1,917,704 | Issue 52 of AWS Cloud Security Weekly | (This is just the highlight of Issue 52 of AWS Cloud Security weekly @... | 0 | 2024-07-09T18:49:44 | https://aws-cloudsec.com/p/issue-52 | security, aws, news | (This is just the highlight of Issue 52 of AWS Cloud Security weekly @ https://aws-cloudsec.com/p/issue-52 << Subscribe to receive the full version in your inbox weekly for free!!).
**What happened in AWS CloudSecurity & CyberSecurity last week July 03-July 09, 2024?**
- AWS Managed Services (AMS) Accelerate customer now have access to Trusted Remediator, allowing them to automatically address recommendations derived from Trusted Advisor checks. This automation eliminates the need for manual intervention to resolve account misconfigurations, enhancing security, fault tolerance, and performance.
**Trending on the news & advisories (Subscribe to the newsletter for details):**
- Avast releases free decryptor for DoNex Ransomware and its Predecessors.
- Google announces the launch of kvmCTF, a vulnerability reward program (VRP) for the Kernel-based Virtual Machine (KVM).
- Twilio Authy- Security Alert: Authy Android (v25.1.0) and iOS App (v26.1.0)
- Proton introduced Docs in Proton Drive. | aws-cloudsec |
1,917,705 | Web4 — The community-based internet of the future | The internet has undergone numerous transformations since its inception, from static websites (Web1)... | 0 | 2024-07-09T18:54:15 | https://dev.to/web4/web4-the-community-based-internet-of-the-future-1nl7 | The internet has undergone numerous transformations since its inception, from static websites (Web1) to interactive platforms (Web2), and decentralized networks with blockchain technologies (Web3). However, the next stage of evolution, [Web4](https://web4.one), represents a fundamental realignment: it brings communities back to the forefront and offers an alternative to major internet monopolies like Meta and TikTok. In this article, we delve into the concept of Web4 and how it aims to revolutionize the digital landscape through free, democratic, and small social networks. In another article, we will then explain the deeper roles that AI and decentralization will have in Web4.
What is Web4?
Web4 aims to liberate the internet from centralized, monopoly-like structures and instead promote decentralized, community-focused networks. These networks are based on democratic principles, where users are not just participants but also co-creators of the platforms.
Web4 is already a concept that is standing today and being built by companies and startups like Linkspreed.
The Vision of Web4
The vision of Web4 is built on the following core principles:
**Decentralization**: Instead of centralized platforms controlled by a few large corporations, Web4 aspires to a distributed network structure. This enhances user control over their own data and interactions.
**Democratization**: Web4 encourages user participation and co-determination. Through decentralized governance models, users can vote on important changes and policies.
**Community Focus**: At the heart of Web4 is the empowerment of communities. Users are encouraged to form smaller, specific networks that reflect their interests and values.
**_Advantages of Web4 Over Traditional Social Networks_**
**Privacy and Security**: Web4 employs advanced security protocols and encryption technologies to protect user privacy. Unlike major platforms often plagued by data breaches, Web4 places a high priority on safeguarding personal data.
**Transparency and Fairness**: Decentralized structures and transparent governance models ensure that decisions are made openly and fairly. Users have visibility into all processes and can actively participate in them.
**Monetization and Value Creation**: Web4 introduces new ways to monetize content, where users can directly benefit from the value they create. This can be through tokenization, micro-payments, or other innovative models.
**_Examples of Web4 in Practice_**
Several platforms and projects are already working on implementing Web4 principles:
**Linkspreed’s Web4**: Linkspreed is a pioneer in the Web4 space, offering a platform based on decentralization and community focus. Users can organize into specific networks and actively participate in shaping the platform.
**[Web4.one](https://web4.one) and [Explore Web4](https://explore.web4.one):** These platforms provide deep insights into the technical and social innovations that Web4 brings. They serve as hubs for developers and users interested in advancing Web4. These platform services are also provided for free by Linkspreed.
**Challenges and Future Prospects**
Like any new technology, Web4 faces challenges. These include the technical implementation of decentralization principles, ensuring user-friendliness, and overcoming legal and regulatory hurdles. Nevertheless, Web4 presents a promising vision for the future of the internet, based on collaboration, fairness, and community-driven value creation.
**Conclusion**
Web4 represents a radical realignment of the internet, where communities and democratic principles take center stage. By promoting decentralized, free, and small social networks, Web4 offers an alternative to existing internet monopolies and paves the way for a fairer and more secure digital future. | web4 | |
1,917,706 | BSides Boulder 2024: Improving Security For All In The High Desert | Boulder, Colorado, is home to the University of Colorado Boulder, which is older than the state... | 0 | 2024-07-09T18:55:02 | https://blog.gitguardian.com/bsides-boulder-2024/ | security, cybersecurity, git, development | Boulder, Colorado, is home to the [University of Colorado Boulder](https://www.colorado.edu/?ref=blog.gitguardian.com), which is older than the state itself. A community focus on knowledge is evident there, as it has more bookstores per capita than any other city in the US. Boulder is considered a high desert, with an altitude of 5,430 feet (1,655 meters) above sea level and very dry air, which might account for the town being thirsty enough to be the [largest beer-producing triangle on the planet](https://www.boulderhomesource.com/blog/boulder-fun-facts/?ref=blog.gitguardian.com#:~:text=The%20Boulder%20Area%20Is%20the%20Largest%20Beer%2DProducing%20Triangle%20in%20the%20World). This spirit of getting together, having a drink and learning made for the perfect backdrop for BSides Boulder 2024.
This year marked the fifth installment of this particular BSides and was the largest gathering so far. Over 150 people traveled to the [Wolf Law Building](https://www.colorado.edu/law/about/wolf-law-building?ref=blog.gitguardian.com) on the UC campus, home to one of the largest law libraries in the US. Throughout the one-day event, there were multiple talks, hallway conversations, and workshops that covered making a home lab and using security tools like [Corelight](https://corelight.com/?ref=blog.gitguardian.com) and [CyberChef](https://gchq.github.io/CyberChef/?ref=blog.gitguardian.com).
[](https://www.linkedin.com/posts/bsides-boulder_bsidesboulder24-activity-7207513770896609280-R9sH?ref=blog.gitguardian.com)
BSides Boulder 2024 stickers
Here are just a few highlights from this year's event.
Getting the right answers from AI requires telling it who to be
---------------------------------------------------------------
[Jason Haddix, CEO and Founder of Arcanum Security,](https://www.linkedin.com/in/jhaddix/?ref=blog.gitguardian.com) in his updated presentation "Red Blue Purple AI," revealed some of the secrets to getting AI to produce better answers. After an amazing intro [video showing the current state of OpenAI's Generative Pre-trained Transformer (GPT)](https://twitter.com/Jhaddix/status/1801378008760258598?ref=blog.gitguardian.com), Jason took us through a high-level overview of prompt engineering based on his experience building the free-to-use [Arcanum Cyber Security Bot](https://chatgpt.com/g/g-HTsfg2w2z-arcanum-cyber-security-bot?ref=blog.gitguardian.com), one of thousands of free bots released to work on top of ChatGPT.
Without revealing all his secret sauce, he said one of the more important things for building prompts is to explain exactly who ChatGPT should impersonate and give details for what is on the line. For example, inputting "you are a 20-year veteran of cyber security and your annual bonus is on the line, please do the following" is going to yield different answers than not giving it any indication of who is answering. Academics and real-world users disagree on why this happens, but Jason's results speak for themself.
Jason also walked us through some use cases for the blue team, starting with asking the security bot to explain details about a newly encountered API to find security flaws. It is also a good tool for quickly summarizing incident response reports, helping humans get to the crux of the situation much faster. He also discussed how you can use ChatGPT to help communicate more effectively with security teams when a new CVE is discovered, drafting the public statements earlier in the conversation.
[](https://www.linkedin.com/posts/bsides-boulder_genai-llms-bsidesboulder24-activity-7207406225427210240-2yXm?ref=blog.gitguardian.com)
Jason Haddix presenting at BSides Boulder
Git is hard, but it is the best we have
---------------------------------------
In her session, "Whodunnit - git repository mysteries," [Natalie Somersall, Principal Federal Solutions Engineer at Chainguard](https://www.linkedin.com/in/nsomersall/?ref=blog.gitguardian.com), explained how Git is really good at showing what happened, but the logging is problematic when it comes to the 'who' and the 'when.' She showed us that the ".git folder is full of magic," such as the [hooks folder](https://www.youtube.com/watch?v=ObksvAZyWdo&ref=blog.gitguardian.com), but that it comes with some complexity.
Part of the complexity of Git is configuration inheritance. You can configure Git at the Local, Global, or System level. System level settings, set at the operating system level, are overridden by Global settings, which live in a particular user's home directory. Local settings inside the .git folder have the final authority when executing commands.
This inheritance means a developer can think they are signing a commit as one user but can mistakenly sign as another user due to an old local configuration. This makes logs rather unfriendly at times. Another confusing fact is that since Git is just storing history in text files, anyone can easily rewrite the timestamp of their commits, making it hard to believe all Git histories reliably.
Natalie said multiple times throughout the presentation that she wished people would "stop putting secrets in repos." In her experience, once a secret is introduced in a shared repo, the only way to really get it out is to make a new 'shallow clone' of the repo once it is fixed, meaning losing all your git history. That is a bad scenario either way. She shared points from this [discussion on her blog](https://some-natalie.dev/blog/git-code-audits/?ref=blog.gitguardian.com).
[](https://www.linkedin.com/posts/dwaynemcdaniel_bsidesboulder24-bsides-activity-7207469313669156865-Bc_6?ref=blog.gitguardian.com)
"Whodunnit - git repository mysteries" by Natalie Somersall
Running commands in someone else's environment
----------------------------------------------
In her session "Encapsulate and Exfiltrate: Exploiting RCE via DNS." [Heidi Metzler, Senior Security Engineer](https://www.linkedin.com/in/heidi-metzler/?ref=blog.gitguardian.com), walked us through a real-world remote code execution (RCE) demonstration. She said if you can execute your own code in someone else's castle, that means you control their castle. At the same time, Domain Name Servers (DNS), the phone book of the internet, makes it possible to [exfiltrate encapsulated payloads by abusing the protocol](https://www.akamai.com/glossary/what-is-dns-data-exfiltration?ref=blog.gitguardian.com). This is a common combo attackers use once they determine whether they can run their code.
She set up a demo website without any security configuration to give us a live demo and the chance to interact with a site that allowed RCE. The site, based around her cat Jim, allowed anyone to execute bash commands by entering them in an input field. For example, running "`pwd`" in the field returned a page containing the output containing the path `/www/html`. In this very interactive session, she asked for commands from the audience to find and exfiltrate a document containing secrets, which is what most attackers immediately look for.
Preventing RCE for many systems, such as CMS Drupal, is as easy as keeping up with security patches. If you are manually creating forms, make sure they are secured to sanitize the input to guard against these well-understood attacks. Testing your own applications for RCE can mean the difference between you or an attacker owning your castle.
[](https://www.linkedin.com/posts/dwaynemcdaniel_bsidesboulder24-bsides-activity-7207482830149308416-1rQ6?ref=blog.gitguardian.com)
Heidi Metzler at #BSidesBoulder24
A high altitude BSides
----------------------
One theme that kept coming up at BSides Boulder was secrets security. Your author was fortunate enough to share a session on [honeytokens and cyber deception in general](https://bsidesboulder.org/speakers/?ref=blog.gitguardian.com#:~:text=Who%20Goes%20There%3F%20Actively%20Detecting%20Intruders%20With%20Cyber%20Deception%20Tools). Running throughout all the sessions was a conversation about stolen secrets or exploiting applications to reveal secrets. While validating what we have been saying in our [State of Secrets Sprawl reports](https://www.gitguardian.com/state-of-secrets-sprawl-report-2024?ref=blog.gitguardian.com), it also seems to indicate the community is ready to have more serious conversation about solving this fundamental issue.
The extremely dry air of Boulder makes you thirsty, but fortunately, we had a chance to refresh ourselves at the after-party at the nearby Sanitas Brewing Company. Given how many interesting turns the security conversations took at the after-party, there was also a clear thirst for knowledge, with people freely asking questions and sharing experiences. If you don't already take part in a local security community, I highly recommend finding one like theirs. I am already looking forward to next year's BSides Boulder. | dwayne_mcdaniel |
1,917,707 | The Comparator Interface | Comparator can be used to compare the objects of a class that doesn’t implement Comparable. You have... | 0 | 2024-07-09T18:56:23 | https://dev.to/paulike/the-comparator-interface-1ebc | java, programming, learning, beginners | **Comparator** can be used to compare the objects of a class that doesn’t implement **Comparable**. You have learned how to compare elements using the **Comparable** interface ([the section](https://dev.to/paulike/the-comparable-interface-1ncj)). Several classes in the Java API, such as **String**, **Date**, **Calendar**, **BigInteger**, **BigDecimal**, and all the numeric wrapper classes for the primitive types, implement the **Comparable** interface. The **Comparable** interface defines the **compareTo** method, which is used to compare two elements of the same class that implement the **Comparable** interface.
What if the elements’ classes do not implement the **Comparable** interface? Can these elements be compared? You can define a _comparator_ to compare the elements of different classes. To do so, define a class that implements the **java.util.Comparator<T>** interface and overrides its **compare** method.
`public int compare(T element1, T element2)`
Returns a negative value if **element1** is less than **element2**, a positive value if **element1** is greater than **element2**, and zero if they are equal.
The **GeometricObject** class was introduced in [the section](https://dev.to/paulike/abstract-classes-2ee5), Abstract Classes. The **GeometricObject** class does not implement the **Comparable** interface. To compare the objects of the **GeometricObject** class, you can define a comparator class, as shown in the code below.
Line 4 implements **Comparator<GeometricObject>**. Line 5 overrides the compare method to **compare** two geometric objects. The class also implements **Serializable**. It is generally a good idea for comparators to implement **Serializable**, as they may be used as ordering methods in serializable data structures. In order for the data structure to serialize successfully, the comparator (if provided) must implement **Serializable**.
The code below gives a method that returns a larger object between two geometric objects. The objects are compared using the **GeometricObjectComparator**.
The program creates a **Rectangle** and a **Circle** object in lines 7–8 (the **Rectangle** and **Circle** classes were defined in [the section](https://dev.to/paulike/abstract-classes-2ee5), Abstract Classes). They are all subclasses of **GeometricObject**. The program invokes the **max** method to obtain the geometric object with the larger area (lines 10).
The **GeometricObjectComparator** is created and passed to the **max** method (line 10) and this comparator is used in the **max** method to compare the geometric objects in line 16.
**Comparable** is used to compare the objects of the class that implement **Comparable**. **Comparator** can be used to compare the objects of a class that doesn’t implement **Comparable**.
Comparing elements using the **Comparable** interface is referred to as comparing using _natural order_, and comparing elements using the **Comparator** interface is referred to as comparing using _comparator_. | paulike |
1,917,708 | Rust and Web Assembly Application | Hey Folks! Once again with a quick tutorial on how to create a wen application with Rust and web... | 0 | 2024-07-09T19:46:23 | https://dev.to/bekbrace/rust-and-web-assembly-application-3hdc | rust, webassembly, programming, webdev | Hey Folks!
Once again with a quick tutorial on how to create a wen application with Rust and web assembly.
The application is a Tax Calculator, a simple app that demonstrates how you can actually create a web application using your Rust knowledge, and leveraging this by using Web Assembly.
Here you ca watch the full tutorial, it will guide you step by step how you can create a simple application with Rust and WebAss ... embly
{% youtube hcA_GuZHyZM %}
So, let us get a bit technical ...
# What is WebAssembly?
WebAssembly (often abbreviated as Wasm) is a binary instruction format for a stack-based virtual machine.
It is designed as a portable compilation target for programming languages, enabling high-performance applications to run on web pages.
WebAssembly is intended to execute at near-native speed by taking advantage of common hardware capabilities.
# How WebAssembly Works with Rust and JavaScript ?
WebAssembly runs in a sandboxed execution environment, providing a secure and fast way to execute code. It works alongside JavaScript, allowing web developers to leverage the performance of Wasm for compute-intensive tasks while using JavaScript for the rest of the application.
Also, WebAssembly modules can be written in languages like Rust and then executed in web environments alongside JavaScript. Rust, known for its performance and safety, is a great fit for writing WebAssembly modules. JavaScript can then be used to interact with these modules, providing a seamless integration between high-performance logic and dynamic web applications.
<!-- -------------------------------------------------- -->
Creating a WebAssembly Tax Calculator with Rust
Step 1: Setting Up the Project
Make sure you have Rust installed - Check my Rust courses, or go directly to rust website to download and install Rust, but I think you already have it installed, so let's move on
# Create a Rust Project
cargo new tax-calc-wasm
cd tax-calc-wasm
- Update Cargo.toml: Open Cargo.toml and add the following under [dependencies] and [lib] sections to configure the project for Wasm:
```toml
[dependencies]
wasm-bindgen = "0.2"
wasm-bindgen is a crate that facilitates the interaction between Rust and JavaScript when targeting WebAssembly.
[lib]
'lib'
This section of Cargo.toml is used to configure settings for the Rust library we are creating.
```
crate-type: This specifies the type of output that the Rust compiler should produce. In Rust, a "crate" is a compilation unit, and crates can be either binary (executables) or libraries.
"cdylib": This stands for "C-compatible dynamic library." When targeting WebAssembly, this type indicates that we want to produce a dynamic library that can be used in environments expecting C-compatible calling conventions. Essentially, it tells the Rust compiler to generate a shared library suitable for WebAssembly.
# Step 2: Writing the Rust Code
Edit src/lib.rs to implement the tax calculation logic
# Step 3: Building the Project
Build the project using wasm-pack:
```bash
wasm-pack build --target web
```
# Step 4: Setting Up the Web Environment
Create an index.html file in the tax-calculator-wasm directory
# Step 5: Serving the Project
To serve the project, you need a simple web server.
Install a Web Server: You can install one using npm:
## npm install -g http-server
http-server .
Navigate to http://localhost:8000 in your web browser to see the tax calculator in action.
Have you ever worked with WebAssembly ? If Yes, did you with Rust or other programming language ?
Thank you so much for reading, watching and interacting.
| bekbrace |
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