id int64 5 1.93M | title stringlengths 0 128 | description stringlengths 0 25.5k | collection_id int64 0 28.1k | published_timestamp timestamp[s] | canonical_url stringlengths 14 581 | tag_list stringlengths 0 120 | body_markdown stringlengths 0 716k | user_username stringlengths 2 30 |
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1,899,542 | Create an IAM User and Set Up Billing Alerts for Your AWS Account | AWS Identity and Access Management (IAM) is used to enhance security and manage access effectively... | 0 | 2024-06-26T07:27:06 | https://dev.to/ahsan598/aws-iam-cost-management-51ai | aws |
**AWS Identity and Access Management (IAM)** is used to enhance security and manage access effectively in AWS, it's crucial to avoid using the root user account for regular operations due to its broad permissions. Instead, creating IAM Users with specific permissions is recommended. IAM (Identity and Access Management) in AWS involves Users, Roles, Groups, and Policies:
- **Users:** Individuals within your organization who need access to AWS resources.
- **Roles:** Used to delegate access to resources securely between AWS services.
- **Groups:** Collections of users. Policies are attached to groups to define permissions for multiple users at once.
- **Policies:** Documents defining permissions. For instance, the "Administrator Access" policy grants full AWS control.
<br>
To enhance security in AWS, **avoid using the root account for daily tasks**. Create **IAM users for individuals** needing access and group them based on roles, applying appropriate policies. This ensures controlled access and minimizes security risks associated with unrestricted account use. **Let's create an IAM user in AWS**
**Step 1 - Sign in to AWS Management Console:**
Here are the steps to follow:
- Go to the [AWS Management Console](https://aws.amazon.com/console/) and sign in with your root user credentials.
- Type **"IAM"** in the search bar and select the IAM service from the list.
**Step 2 - Access IAM Dashboard:**
- In the IAM dashboard, click on **"Groups"** in the left-hand menu.
- Click on the **"Create group"** button to begin creating a new IAM group.
- Enter a suitable name for the group, such as **"AdminGroup"** or any other descriptive name.
**Step 3 - Attach Policies:**
- In the **"Attach permissions policies"** step, search for and select policies such as **"AdministratorAccess"** and **"Billing"** from the AWS managed policies list. These policies provide permissions for administrative tasks and billing management.
- Review the policies that are attached to the group.
- Click on **"Create group"** to complete the creation of the IAM group.
**Step 4 - Add User:**
- Click on the **"Add user"** button to start creating a new IAM user.
- Enter a suitable name for the user, such as **"Admin"** or another descriptive name.
- **Choose the type of access for the user:**
- **Programmatic access:** Allows interaction with AWS services via APIs, SDKs, and CLI.
- **AWS Management Console access:** Enables sign-in to the AWS Management Console with a custom password. Ensure the option "User must create a new password at next sign-in" is selected.
- Add the user to the IAM group created earlier with defined permissions.
- Review the user details, permissions, and tags (if applicable).
- Click on **"Create user"** to complete the creation of the IAM user.
**Step 5 - Sign-in with IAM User:**
- If it's your first time logging in, you'll be prompted to set a new password. Ensure to choose a secure password.
- Access the AWS Management Console either with the provided console login link or by visiting the AWS Management Console homepage directly.
- Once logged in, you can manage AWS services based on the permissions assigned to your IAM user.
**Step 6 - Enable Multi-Factor Authentication (MFA):**
- Go to the AWS Management Console.
- Navigate to the IAM (Identity and Access Management) service.
- Select **"Users"** and then your username.
- Under the **"Security Credentials"** tab, click **"Activate MFA"** and follow the instructions to enable MFA using a virtual MFA device like Google Authenticator.
<br>
##**<center>Billing and Cost Management</center>**
**AWS Billing and Cost Management** offers tools and resources for monitoring, managing, and optimizing AWS spending and usage. It enables setting budgets, tracking costs, analyzing usage patterns, and accessing detailed billing reports to effectively manage AWS expenses.
Here is the documention on AWS [Billing](https://aws.amazon.com/aws-cost-management/aws-billing/) and [Cost Management.](https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/billing-what-is.html)
Let's **configure billing alarm** to ensure compliance with AWS Free Tier limits and **avoid incurring charges**. Below are the steps to achieve this:
**Step 1: Navigate to AWS Billing Dashboard**
Sign in to the AWS Management Console, then navigate to the **"Billing and Cost Management"** dashboard under your user account.
**Step 2: Access Billing Alarms**
In the left-hand menu, go to the **"Preferences and Settings"** section and click on **"Billing Preferences."** Next, enable **"Invoice delivery preferences"** and **"Alert preferences"** by entering your email ID, and ensure all three options are selected to receive alerts via email.
**Step 3: Setup CloudWatch Alram**
Now under services, locate the CloudWatch service (which is a monitoring service). Ensure you are in the **"N. Virginia"** region to create a billing alarm and monitor your bills effectively.
In the left-hand menu, navigate to the **"Alarms"** section and click on **"All Alarms"** to view existing alarms or **"Create Alarm"** to set up a new one.
Now click on **"Select Metric"**, choose **"Billing"** as the service, then select **"Total Estimated Charge"**, ensure the currency is set to **"USD"**, and click **"Select Metric"** to proceed.
**Step 4: Define Alarm Threshold**
Set the alarm threshold just below the Free Tier usage limits to receive alerts before incurring charges. For example, set the alarm when estimated charges exceed **$5** if applicable.
**Step 5: Configure Notification**
Create an SNS topic to receive notifications when the alarm threshold is reached, then click **"Next"** to proceed.
**Step 6: Confirm and Create**
Give the alarm a name, then click **"Next"** to review your settings. Finally, click **"Create Alarm"** to activate the billing alarm.
You will receive an email to confirm your subscription and start receiving alerts.
**Regularly monitor your AWS usage and configure billing alerts to notify you when your usage nears or exceeds the free tier limits. Ensure responsible and secure account management at all times!** | ahsan598 |
1,901,016 | Unlocking the Power of Integration with MuleSoft: A Comprehensive Guide | In today's rapidly evolving digital landscape, businesses must stay agile and responsive to... | 0 | 2024-06-26T07:26:14 | https://dev.to/mylearnnest/unlocking-the-power-of-integration-with-mulesoft-a-comprehensive-guide-5e3j | In today's rapidly evolving digital landscape, businesses must stay agile and responsive to ever-changing customer demands and market conditions. One of the critical components to achieving this agility is seamless integration across various applications, systems, and data sources. MuleSoft, a [leading integration platform](https://www.mylearnnest.com/best-mulesoft-training-in-hyderabad/), plays a pivotal role in helping organizations achieve this integration with ease and efficiency. In this article, we will delve into what MuleSoft is used for, explore whether MuleSoft is an API, understand why companies use MuleSoft, and identify the tools used for MuleSoft.
**What is MuleSoft Used For?**
MuleSoft is primarily used for enabling seamless integration and connectivity across a multitude of applications, systems, and data sources. It provides a unified platform to connect applications, data, and devices, both on-premises and in the cloud. The key use cases for MuleSoft include:
**Application Integration:** MuleSoft enables businesses to integrate their various software applications, ensuring that data flows smoothly between them. This is essential for maintaining consistency and accuracy across different systems.
**Data Integration:** By connecting disparate data sources, MuleSoft helps organizations gain a comprehensive view of their data, facilitating better decision-making and analytics.
**API Management:** MuleSoft provides [robust tools](https://www.mylearnnest.com/best-mulesoft-training-in-hyderabad/) for designing, building, managing, and securing APIs. This is crucial for organizations looking to expose their services to external partners or develop a microservices architecture.
**Legacy System Modernization:** Many organizations still rely on legacy systems that are critical to their operations. MuleSoft helps bridge the gap between these systems and modern applications, enabling businesses to leverage their existing investments while adopting new technologies.
**Cloud Integration:** As more organizations move their operations to the cloud, MuleSoft offers solutions to connect cloud-based applications with on-premises systems, ensuring a seamless transition and consistent data flow.
**Is MuleSoft an API?**
MuleSoft itself is not an API but rather an integration platform that enables the creation, management, and deployment of APIs. MuleSoft's Anypoint Platform provides a comprehensive suite of tools for API lifecycle management, including API design, development, testing, deployment, and monitoring. The platform also includes API gateways and security features to ensure that APIs are protected and perform efficiently.
By leveraging MuleSoft, organizations can create APIs that facilitate the integration of various systems and applications. These APIs act as intermediaries, allowing different software components to communicate and share data with each other. This API-centric approach to integration is a key reason why MuleSoft is highly valued in modern IT environments.
**Why Do Companies Use MuleSoft?**
There are several compelling reasons why companies choose MuleSoft as their integration platform of choice:
**Scalability:** MuleSoft's architecture is designed to handle large volumes of [data and high transaction rates](https://www.mylearnnest.com/best-mulesoft-training-in-hyderabad/). This makes it suitable for organizations of all sizes, from startups to large enterprises.
**Flexibility:** MuleSoft supports a wide range of integration scenarios, including on-premises, cloud, and hybrid environments. This flexibility allows organizations to tailor their integration strategies to their specific needs.
**Speed and Efficiency:** MuleSoft's pre-built connectors and templates accelerate the integration process, reducing the time and effort required to connect different systems. This enables businesses to bring new services and products to market faster.
**Cost Savings:** By streamlining [integration processes](https://www.mylearnnest.com/best-mulesoft-training-in-hyderabad/) and reducing the need for custom development, MuleSoft helps organizations save on development and maintenance costs. Additionally, its cloud-based solutions can lower infrastructure expenses.
**Improved Customer Experience:** With seamless integration, organizations can provide a more cohesive and personalized customer experience. Data from various sources can be combined to offer insights that drive better customer interactions.
**Robust Security:** MuleSoft provides comprehensive security features, including data encryption, access controls, and compliance with industry standards. This ensures that sensitive data is protected throughout the integration process.
**Enhanced Agility:** In a rapidly changing business environment, the ability to quickly adapt to new technologies and market demands is crucial. MuleSoft's agile integration approach empowers organizations to respond to changes swiftly and effectively.
**Which Tool is Used for MuleSoft?**
MuleSoft's primary tool is the Anypoint Platform, a comprehensive integration suite that offers a wide range of features and capabilities. The Anypoint Platform includes:
**Anypoint Design Center:** This tool allows users to design and build APIs and integrations using a visual interface. It includes features for API modeling, development, and testing.
**Anypoint Exchange:** A marketplace for pre-built connectors, templates, and other integration assets. Users can leverage these assets to accelerate their integration projects.
**Anypoint Management Center:** This tool provides monitoring, analytics, and management capabilities for APIs and integrations. It helps organizations ensure the performance and reliability of their integrations.
**Anypoint Studio:** An Integrated Development Environment (IDE) for designing, building, and deploying integrations. It supports drag-and-drop functionality and various connectors for different systems.
**Anypoint Connectors:** Pre-built connectors that enable seamless integration with various applications, databases, and services. These connectors simplify the process of connecting different systems.
**API Gateway:** A secure gateway for managing and protecting APIs. It includes features for traffic management, security, and policy enforcement.
**Anypoint Monitoring:** Provides real-time visibility into the performance and health of APIs and integrations. It helps organizations detect and resolve issues quickly.
**Anypoint Security:** A suite of security features designed to protect APIs and integrations from threats. It includes encryption, tokenization, and other security measures.
**Conclusion:**
[MuleSoft](https://www.mylearnnest.com/best-mulesoft-training-in-hyderabad/) has established itself as a leading integration platform that empowers organizations to connect their applications, data, and devices seamlessly. By leveraging MuleSoft, businesses can achieve greater agility, efficiency, and innovation in their operations. Whether it's enabling application integration, managing APIs, or modernizing legacy systems, MuleSoft provides the tools and capabilities needed to drive digital transformation. | mylearnnest | |
1,901,015 | Can the tip displayed above be configured to modify the background color and text color when hovering a long label? | Title Can the tip displayed above be configured to modify the background color and text... | 0 | 2024-06-26T07:25:50 | https://dev.to/simaq/can-the-tip-displayed-above-be-configured-to-modify-the-background-color-and-text-color-when-hovering-a-long-label-4g19 | vchart, visactor | ---
title: Can the tip displayed above be configured to modify the background color and text color when hovering a long label?
published: true
description:
tags: VChart, visactor
# cover_image: https://direct_url_to_image.jpg
# Use a ratio of 100:42 for best results.
# published_at: 2024-06-26 07:24 +0000
---
## Title
Can the tip displayed above be configured to modify the background color and text color when hovering a long label?
## Description
Can the tip displayed above be configured to modify the background color and text color when hovering a long label?
## Solution
Just configure the poptip property in the theme.
```
theme:{
component: {
poptip: {
contentStyle: {
fill: '#fff',
},
panel: {
fill: '#ccc'
}
}
}
}
```
## Code Example
```
const spec = {
type: 'bar',
data: [
{
id: 'barData',
values: [
{
name: 'AppleAppleAppleAppleAppleAppleAppleAppleAppleAppleApple',
value: 214480
},
{
name: 'Google',
value: 155506
},
{
name: 'Amazon',
value: 100764
},
{
name: 'Microsoft',
value: 92715
},
{
name: 'Coca-Cola',
value: 66341
},
{
name: 'Samsung',
value: 59890
},
{
name: 'Toyota',
value: 53404
},
{
name: 'Mercedes-Benz',
value: 48601
},
{
name: 'Facebook',
value: 45168
},
{
name: "McDonald's",
value: 43417
},
{
name: 'Intel',
value: 43293
},
{
name: 'IBM',
value: 42972
},
{
name: 'BMW',
value: 41006
},
{
name: 'Disney',
value: 39874
},
{
name: 'Cisco',
value: 34575
},
{
name: 'GE',
value: 32757
},
{
name: 'Nike',
value: 30120
},
{
name: 'Louis Vuitton',
value: 28152
},
{
name: 'Oracle',
value: 26133
},
{
name: 'Honda',
value: 23682
}
]
}
],
direction: 'horizontal',
xField: 'value',
yField: 'name',
axes: [
{
orient: 'bottom',
visible: false
}
],
label: {
visible: true
},
theme:{
component: {
poptip: {
contentStyle: {
fill: '#fff',
},
panel: {
fill: '#ccc'
}
}
}
}
};
const vchart = new VChart(spec, { dom: CONTAINER_ID });
vchart.renderSync();
// Just for the convenience of console debugging, DO NOT COPY!
window['vchart'] = vchart;
```
## Result
## Related Documents
- API：https://visactor.io/vchart/option/barChart#theme.component
- Github：https://github.com/VisActor/VChart/ | simaq |
1,901,014 | How to remove the axis scale value? | Title How to remove axis scale values? Description How to remove the content... | 0 | 2024-06-26T07:23:50 | https://dev.to/simaq/how-to-remove-the-axis-scale-value-43ob | visactor, vchart | ---
title: How to remove the axis scale value?
published: true
description:
tags: visactor, vchart
# cover_image: https://direct_url_to_image.jpg
# Use a ratio of 100:42 for best results.
# published_at: 2024-06-26 07:23 +0000
---
## Title
How to remove axis scale values?
## Description
How to remove the content in the red box?
## Solution
You can configure the label.visible of the bottom axis to false to turn off the axis label.
## Related Documents
- Tutorial: https://visactor.io/vchart/guide/tutorial_docs/Chart_Concepts/Axes
- API：https://visactor.bytedance.net/vchart/option/barChart#axes-linear
- Github：https://github.com/VisActor/VChart/ | simaq |
1,901,013 | How to configure tooltip and legend shape as rectangles with rounded corners | Title How to configure Legend Shape as a rectangle with rounded corners? ... | 0 | 2024-06-26T07:22:03 | https://dev.to/simaq/how-to-configure-tooltip-and-legend-shape-as-rectangles-with-rounded-corners-36mg | visactor, vchart | ---
title: How to configure tooltip and legend shape as rectangles with rounded corners
published: true
description:
tags: visactor, vchart
# cover_image: https://direct_url_to_image.jpg
# Use a ratio of 100:42 for best results.
# published_at: 2024-06-26 07:21 +0000
---
## Title
How to configure Legend Shape as a rectangle with rounded corners?
## Description
As shown below:
## Solution
Support configuration as'rectRound 'type
1. Tooltip: `shapeType:"rectRound"`
```
tooltip: {
mark: {
content: [
{
shapeType: 'rectRound',
key: datum => datum['type'],
value: datum => datum['value'] + '%'
}
]
}
}
```
2. Legend:
```
legends: {
visible: true,
orient: 'right',
item: {
width: '15%',
shape: {
style: {
symbolType: 'rectRound'
}
}
}
},
```
## Code Example
```
const spec = {
type: 'pie',
data: [
{
id: 'pie',
values: [
{ value: 10, category: 'One' },
{ value: 9, category: 'Two' },
{ value: 6, category: 'Three' },
{ value: 5, category: 'Four' },
{ value: 4, category: 'Five' },
{ value: 3, category: 'Six' },
{ value: 1, category: 'Seven' }
]
}
],
categoryField: 'category',
valueField: 'value',
legends: {
visible: true,
orient: 'right',
item: {
width: '15%',
shape: {
style: {
symbolType: 'rectRound'
}
}
}
},
tooltip: {
mark: {
content: [
{
shapeType: 'rectRound',
key: datum => datum['type'],
value: datum => datum['value'] + '%'
}
]
}
}
};
const vchart = new VChart(spec, { dom: CONTAINER_ID });
vchart.renderSync();
// Just for the convenience of console debugging, DO NOT COPY!
window['vchart'] = vchart;
```
## Result
## Related Documents
- Tutorials: https://visactor.io/vchart/guide/tutorial_docs/Chart_Concepts/Legend , https://visactor.io/vchart/guide/tutorial_docs/Chart_Concepts/Tooltip
- API：https://visactor.bytedance.net/vchart/option/barChart#tooltip.dimension.content，https://visactor.bytedance.net/vchart/option/barChart-legends-discrete#item.shape.style.symbolType
- Github：https://github.com/VisActor/VChart/ | simaq |
1,900,245 | Deploy the vLLM Inference Engine to Run Large Language Models (LLM) on Koyeb | vLLM is a high performance and easy-to-use library for running inference workloads. It allows you to... | 0 | 2024-06-26T07:22:00 | https://www.koyeb.com/tutorials/deploy-the-vllm-inference-engine-to-run-large-language-models-llm-on-koyeb | webdev, programming, tutorial, ai | [vLLM](https://github.com/vllm-project/vllm) is a high performance and easy-to-use library for running inference workloads. It allows you to download popular models from [Hugging Face](https://huggingface.co/), run them on local hardware with custom configuration, and serve an OpenAI-compatible API server as an interface. Using vLLM, you can experiment with different models and build LLM-based applications without relying on externally hosted services.
In this tutorial, we will show you how to set up a vLLM instance running on GPUs on Koyeb. We will create a custom `Dockerfile` to simplify configuration. Afterwards, we will deploy vLLM to Koyeb's GPU instances and demonstrate how to interact with the completions and chat APIs. Finally, we'll discuss some additional customization options that you can use to extend your vLLM instance.
You can consult the [repository for this guide](https://github.com/koyeb/example-vllm) to follow along on your own. You can deploy the vLLM instance by clicking the [Deploy to Koyeb button](https://www.koyeb.com/docs/build-and-deploy/deploy-to-koyeb-button) below:
[](https://app.koyeb.com/deploy?name=koyeb-vllm&type=git&repository=koyeb%2Fexample-vllm&branch=main&builder=dockerfile&instance_type=gpu-nvidia-rtx-4000-sff-ada&env%5BHF_TOKEN%5D=CHANGE_ME&ports=8000%3Bhttp%3B%2F)
Be sure to set the `HF_TOKEN` environment variable to a Hugging Face read-only API token value so vLLM can authenticate correctly. You will also need to set the **Grace period** in the **Health checks** section to 300 seconds. You can consult the appropriate sections of this guide for additional information.
## Requirements
To successfully follow and complete this guide, you need:
- A [Koyeb account](https://app.koyeb.com) to build and run the vLLM instance on GPUs.
- Access to GPU Instances on Koyeb. [Join the preview today](https://www.koyeb.com/ai) to gain access.
- [Hugging Face](https://huggingface.co/) account with a read-only API token. You will use this to fetch the models that vLLM will run. You may also need to accept the terms and conditions or usage license agreements associated with the models you intend to use. In some cases, you may need to request access to the model from the model owners on Hugging Face. For this guide, make sure you have accepted any terms required for the [google/gemma-2b-it model](https://huggingface.co/google/gemma-2b-it).
## Steps
To complete this guide and deploy your own vLLM instance, you'll need to follow these steps:
1. [Create a custom Dockerfile](#create-a-custom-dockerfile)
2. [Push the Dockerfile to GitHub](#push-the-dockerfile-to-git-hub)
3. [Deploy vLLM on Koyeb](#deploy-v-llm-on-koyeb)
4. [Querying the model with the vLLM API](#querying-the-model-with-the-v-llm-api)
- [Querying the completions endpoint](#querying-the-completions-endpoint)
- [Querying the chat endpoint](#querying-the-chat-endpoint)
5. [Additional vLLM image customization](#additional-v-llm-image-customization)
## Create a custom Dockerfile
The simplest way to deploy vLLM on Koyeb is to use the [project-provided Docker image](https://hub.docker.com/r/vllm/vllm-openai). This image is mainly configured by passing [command arguments](https://docs.docker.com/engine/reference/run/#commands-and-arguments) at runtime.
While this works as intended, it can be awkward to use in practice when longer argument lists are necessary. As an alternative, we can build a `Dockerfile` based on the official image that takes its configuration from environment variables. Koyeb can build a container image from the `Dockerfile` during deployment.
Begin by creating a new project directory on your local computer and navigating inside:
```bash copy
mkdir example-vllm
cd example-vllm
```
Once inside, create a `Dockerfile` with the following content:
{/* prettier-ignore-start */}
```dockerfile copy
FROM vllm/vllm-openai:latest
ENTRYPOINT python3 -m vllm.entrypoints.openai.api_server \
--port ${PORT:-8000} \
--model ${MODEL_NAME:-google/gemma-2b-it} \
${REVISION:+--revision "$REVISION"}
```
{/* prettier-ignore-end */}
This uses the latest version of the [`vllm/vllm-openai` image](https://hub.docker.com/r/vllm/vllm-openai) as its starting point. It sets a new `ENTRYPOINT` instruction that mirrors [the one from the base image](https://hub.docker.com/layers/vllm/vllm-openai/v0.5.0/images/sha256-6f72ad703a07d62965de92123e0fa5c6297c18c06a708ec2074447d3456960d2#:~:text=29-,ENTRYPOINT%20%5B%22python3%22%20%22%2Dm%22%20%22vllm.entrypoints.openai.api_server%22%5D,-0%20B), with a few key differences:
- Instead of using the [exec form](https://docs.docker.com/reference/dockerfile/#exec-form-entrypoint-example), it uses the [shell form](https://docs.docker.com/reference/dockerfile/#shell-form-entrypoint-example) so that environment variables can be evaluated.
- It appends command arguments that we may wish to configure at runtime to the end.
The command parameters use [parameter expansion](https://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html) to provide default values and to only include configuration flags when their associate environment variables are present.
Using this `Dockerfile`, we can build an image that we can configure by passing the `PORT`, `MODEL_NAME`, and `REVISION` environment variables at runtime.
## Push the Dockerfile to GitHub
The Dockerfile above is the only thing we need to build an easily configurable vLLM image. We can commit the file to a git repository and push it to GitHub.
[Create a new GitHub repository](https://github.com/new) and then run the following commands to commit and push changes to your GitHub repository:
```bash /<YOUR_GITHUB_USERNAME>/ /<YOUR_REPOSITORY_NAME>/ copy
git add :/
git commit -m "Initial commit"
git remote add origin git@github.com:<YOUR_GITHUB_USERNAME>/<YOUR_REPOSITORY_NAME>.git
git branch -M main
git push -u origin main
```
**Note:** Make sure to replace `<YOUR_GITHUB_USERNAME>` and `<YOUR_REPOSITORY_NAME>` with your GitHub username and repository name.
## Deploy vLLM on Koyeb
Now that the `Dockerfile` is on GitHub, we can deploy it to Koyeb. On the **Overview** tab of the [Koyeb control panel](https://app.koyeb.com/), click **Create Web Service** to begin:
1. Select **GitHub** as the deployment method.
2. Select your vLLM project repository. Alternatively, you can enter our public [vLLM example repository](https://github.com/koyeb/example-vllm) into the **Public GitHub repository** field at the bottom of the page: `https://github.com/koyeb/example-vllm`.
3. In the **Environment variables** section, click **Bulk edit** to enter multiple environment variables at once. In the text box that appears, paste the following:
```bash copy
HF_TOKEN=
MODEL_NAME=
REVISION=
VLLM_API_KEY=
```
Set the variable values to reference your own information as follows:
- `HF_TOKEN`: Set this to your Hugging Face read-only API token.
- `MODEL_NAME`: Set this to the name of the model you wish to use, as given on the Hugging Face site. You can check [what models vLLM supports](https://docs.vllm.ai/en/latest/models/supported_models.html) to find out more. Click the model name copy icon on the Hugging Face page to copy the appropriate value. Remove this variable to deploy the default `google/gemma-2b-it` model.
- `REVISION`: Set this to the model revision you wish to use. You can find available revisions in a drop down menu on the **Files and versions** tab of the Hugging Face model page. Remove this variable to deploy the default revision.
- `VLLM_API_KEY`: This defines an authorization token that must be provided when querying the API. Remove this if you wish to allow unauthenticated queries to your API.
4. In the **Instance** section, select the **GPU** category and choose **RTX-4000-SFF-ADA**. These Instances are available when you request access to the [GPU preview](https://www.koyeb.com/ai).
5. In the **Health checks** section, set the **Grace period** to 300 seconds. This will provide time for vLLM to download the appropriate model from Hugging face and initialize the server.
6. Click **Deploy**.
Koyeb will pull your vLLM repository, build the `Dockerfile` it contains, and run it on a GPU Instance. During deployment, vLLM will fetch the provided model from Hugging Face and start up the API server to expose it to users.
Once the deployment is complete, access your vLLM instance by visiting your Koyeb deployment URL. The application URL should have the following format:
```
https://<YOUR_APP_NAME>-<YOUR_KOYEB_ORG>-<HASH>.koyeb.app
```
If you did _not_ include the `VLLM_API_KEY` variable during deployment, you should be able to access the API interface using your web browser (we will demonstrate how to authenticate with an API key in the next section). To verify the model was loaded as expected, visit the `/v1/models` path:
{/* prettier-ignore-start */}
```json
{
"object": "list",
"data": [
{
"id": "google/gemma-2b-it",
"object": "model",
"created": 1718289027,
"owned_by": "vllm",
"root": "google/gemma-2b-it",
"parent": null,
"max_model_len": 8192,
"permission": [
{
"id": "modelperm-5b9bc16d74f94d71aa5c5a6de4a49078",
"object": "model_permission",
"created": 1718289027,
"allow_create_engine": false,
"allow_sampling": true,
"allow_logprobs": true,
"allow_search_indices": false,
"allow_view": true,
"allow_fine_tuning": false,
"organization": "*",
"group": null,
"is_blocking": false
}
]
}
]
}
```
{/* prettier-ignore-end */}
## Querying the model with the vLLM API
While you can access the API's web interface in a browser, you cannot pass information required to interact meaningfully with the API. To do so, you need to use a more configurable HTTP client. In the examples below, we'll use `curl` and `jq` as a basic toolkit.
We can replicate the model query shown above by typing:
```bash /<YOUR_VLLM_API_URL>/ copy
curl <YOUR_VLLM_API_URL>/v1/models -H "Content-Type: application/json" | jq
```
If you configured an API key with `VLLM_API_KEY`, you must include the token in an authentication header like this:
```bash /<YOUR_VLLM_API_URL>/ /<YOUR_VLLM_API_KEY>/ copy
curl <YOUR_VLLM_API_URL>/v1/models -H "Content-Type: application/json" \
-H "Authorization: Bearer <YOUR_VLLM_API_KEY>" | jq
```
In the rest of the examples, we will include the `Authorization` header, but you can delete that if your deployment does not require it.
### Querying the completions endpoint
To use the [completions API](https://docs.vllm.ai/en/latest/getting_started/quickstart.html#using-openai-completions-api-with-vllm), query the `/v1/completions` endpoint, passing in a JSON object that sets the `model`, `prompt`, `max_tokens`, and `temperature`:
{/* prettier-ignore-start */}
```bash /<YOUR_VLLM_API_URL>/ /<YOUR_VLLM_API_KEY>/ copy
curl <YOUR_VLLM_API_URL>/v1/completions -H "Content-Type: application/json" \
-H "Authorization: Bearer <YOUR_VLLM_API_KEY>" \
-d '{
"model": "google/gemma-2b-it",
"prompt": "An avocado is a",
"max_tokens": 30,
"temperature": 0
}' | jq
```
{/* prettier-ignore-end */}
The response object includes a `choices.text` field with the response:
{/* prettier-ignore-start */}
```json
{
"id": "cmpl-006ef2ad91c54182af85736b6f50d2f5",
"object": "text_completion",
"created": 1718286831,
"model": "google/gemma-2b-it",
"choices": [
{
"index": 0,
"text": " fruit, but it is not a berry. It is a seedless fruit that is high in monounsaturated fat. Avocados are often used in",
"logprobs": null,
"finish_reason": "length",
"stop_reason": null
}
],
"usage": {
"prompt_tokens": 5,
"total_tokens": 35,
"completion_tokens": 30
}
}
```
{/* prettier-ignore-end */}
### Querying the chat endpoint
The `google/gemma-2b-it` model includes a [chat template](https://huggingface.co/google/gemma-2b-it#chat-template) that allows you to query in a conversational manner using roles.
Use the chat endpoint by querying `/v1/chat/completions`. Instead of passing a `prompt`, this time, the request object must include a `messages` array that defines a `user` role with a query:
{/* prettier-ignore-start */}
```bash /<YOUR_VLLM_API_URL>/ /<YOUR_VLLM_API_KEY>/ copy
curl <YOUR_VLLM_API_URL>/v1/chat/completions -H "Content-Type: application/json" \
-H "Authorization: Bearer <YOUR_VLLM_API_KEY>" \
-d '{
"model": "google/gemma-2b-it",
"messages": [{"role": "user", "content": "Why is the sky blue?"}]
}' | jq
```
{/* prettier-ignore-end */}
The response object will include a response associated with the "assistant" role defined by the chat template:
{/* prettier-ignore-start */}
```json
{
"id": "cmpl-90c4a7b4f3664aa7ab46c78aed05346e",
"object": "chat.completion",
"created": 1718289767,
"model": "google/gemma-2b-it",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "The sky is blue due to Rayleigh scattering. Rayleigh scattering is the scattering of light by particles that have a size comparable to the wavelength of light. The blue light has a longer wavelength than other colors of light, so it is scattered more strongly. This is why the sky appears blue.",
"tool_calls": []
},
"logprobs": null,
"finish_reason": "stop",
"stop_reason": null
}
],
"usage": {
"prompt_tokens": 15,
"total_tokens": 73,
"completion_tokens": 58
}
}
```
{/* prettier-ignore-end */}
## Additional vLLM image customization
The `Dockerfile` we created earlier includes a basic amount of configurability with a few of the most common options you might want to change. If you need to customize the image and functionality further, you can continue to develop the `Dockerfile`.
If you need to configure additional vLLM options for your deployment, you can extend the `Dockerfile` with additional parameters based on the presence or absence of environment variables.
To include most of the vLLM options, you can deploy an image that can respond to a large number of variables:
<details>
<summary>
**Note:** Expand here to see fully parameterized `Dockerfile`.
</summary>
{/* prettier-ignore-start */}
```dockerfile copy
FROM vllm/vllm-openai:latest
ENTRYPOINT python3 -m vllm.entrypoints.openai.api_server \
--port $PORT \
--model ${MODEL_NAME:-google/gemma-2b-it} \
${REVISION:+--revision "$REVISION"} \
${UVICORN_LOG_LEVEL:+--uvicorn-log-level "$UVICORN_LOG_LEVEL"} \
${LORA_MODULES:+--lora-modules "$LORA_MODULES"} \
${CHAT_TEMPLATE:+--chat-template "$CHAT_TEMPLATE"} \
${RESPONSE_ROLE:+--response-role "$RESPONSE_ROLE"} \
${TOKENIZER:+--tokenizer "$TOKENIZER"} \
${SKIP_TOKENIZER_INIT:+--skip-tokenizer-init} \
${CODE_REVISION:+--code-revision "$CODE_REVISION"} \
${TOKENIZER_REVISION:+--tokenizer-revision "$TOKENIZER_REVISION"} \
${TOKENIZER_MODE:+--tokenizer-mode "$TOKENIZER_MODE"} \
${TRUST_REMOTE_CODE:+--trust-remote-code} \
${LOAD_FORMAT:+--load-format "$LOAD_FORMAT"} \
${DTYPE:+--dtype "$DTYPE"} \
${KV_CACHE_DTYPE:+--kv-cache-dtype "$KV_CACHE_DTYPE"} \
${MAX_MODEL_LEN:+--max-model-len "$MAX_MODEL_LEN"} \
${GUIDED_DECODING_BACKEND:+--guided-decoding-backend "$GUIDED_DECODING_BACKEND"} \
${DISTRIBUTED_EXECUTOR_BACKEND:+--distributed-executor-backend "$DISTRIBUTED_EXECUTOR_BACKEND"} \
${PIPELINE_PARALLEL_SIZE:+--pipeline-parallel-size "$PIPELINE_PARALLEL_SIZE"} \
${TENSOR_PARALLEL_SIZE:+--tensor-parallel-size "$TENSOR_PARALLEL_SIZE"} \
${MAX_PARALLEL_LOADING_WORKERS:+--max-parallel-loading-workers "$MAX_PARALLEL_LOADING_WORKERS"} \
${RAY_WORKERS_USE_NSIGHT:+--ray-workers-use-nsight} \
${BLOCK_SIZE:+--block-size "$BLOCK_SIZE"} \
${ENABLE_PREFIX_CACHING:+--enable-prefix-caching} \
${DISABLE_SLIDING_WINDOW:+--disable-sliding-window} \
${USE_V2_BLOCK_MANAGER:+--use-v2-block-manager} \
${NUM_LOOKAHEAD_SLOTS:+--num-lookahead-slots "$NUM_LOOKAHEAD_SLOTS"} \
${SEED:+--seed "$SEED"} \
${SWAP_SPACE:+--swap-space "$SWAP_SPACE"} \
${GPU_MEMORY_UTILIZATION:+--gpu-memory-utilization "$GPU_MEMORY_UTILIZATION"} \
${NUM_GPU_BLOCKS_OVERRIDE:+--num-gpu-blocks-override "$NUM_GPU_BLOCKS_OVERRIDE"} \
${MAX_NUM_BATCHED_TOKENS:+--max-num-batched-tokens "$MAX_NUM_BATCHED_TOKENS"} \
${MAX_NUM_SEQS:+--max-num-seqs "$MAX_NUM_SEQS"} \
${MAX_LOGPROBS:+--max-logprobs "$MAX_LOGPROBS"} \
${DISABLE_LOG_STATS:+--disable-log-stats} \
${QUANTIZATION:+--quantization "$QUANTIZATION"} \
${ROPE_SCALING:+--rope-scaling "$ROPE_SCALING"} \
${ROPE_THETA:+--rope-theta "$ROPE_THETA"} \
${ENFORCE_EAGER:+--enforce-eager} \
${MAX_SEQ_LEN_TO_CAPTURE:+--max-seq-len-to-capture "$MAX_SEQ_LEN_TO_CAPTURE"} \
${DISABLE_CUSTOM_ALL_REDUCE:+--disable-custom-all-reduce} \
${TOKENIZER_POOL_SIZE:+--tokenizer-pool-size "$TOKENIZER_POOL_SIZE"} \
${TOKENIZER_POOL_TYPE:+--tokenizer-pool-type "$TOKENIZER_POOL_TYPE"} \
${TOKENIZER_POOL_EXTRA_CONFIG:+--tokenizer-pool-extra-config "$TOKENIZER_POOL_EXTRA_CONFIG"} \
${ENABLE_LORA:+--enable-lora} \
${MAX_LORAS:+--max-loras "$MAX_LORAS"} \
${MAX_LORA_RANK:+--max-lora-rank "$MAX_LORA_RANK"} \
${LORA_EXTRA_VOCAB_SIZE:+--lora-extra-vocab-size "$LORA_EXTRA_VOCAB_SIZE"} \
${LORA_DTYPE:+--lora-dtype "$LORA_DTYPE"} \
${LONG_LORA_SCALING_FACTORS:+--long-lora-scaling-factors "$LONG_LORA_SCALING_FACTORS"} \
${MAX_CPU_LORAS:+--max-cpu-loras "$MAX_CPU_LORAS"} \
${FULLY_SHARDED_LORAS:+--fully-sharded-loras} \
${IMAGE_INPUT_TYPE:+--image-input-type "$IMAGE_INPUT_TYPE"} \
${IMAGE_TOKEN_ID:+--image-token-id "$IMAGE_TOKEN_ID"} \
${IMAGE_INPUT_SHAPE:+--image-input-shape "$IMAGE_INPUT_SHAPE"} \
${IMAGE_FEATURE_SIZE:+--image-feature-size "$IMAGE_FEATURE_SIZE"} \
${IMAGE_PROCESSOR:+--image-processor "$IMAGE_PROCESSOR"} \
${IMAGE_PROCESSOR_REVISION:+--image-processor-revision "$IMAGE_PROCESSOR_REVISION"} \
${DISABLE_IMAGE_PROCESSOR:+--disable-image-processor} \
${SCHEDULER_DELAY_FACTOR:+--scheduler-delay-factor "$SCHEDULER_DELAY_FACTOR"} \
${ENABLE_CHUNKED_PREFILL:+--enable-chunked-prefill} \
${SPECULATIVE_MODEL:+--speculative-model "$SPECULATIVE_MODEL"} \
${NUM_SPECULATIVE_TOKENS:+--num-speculative-tokens "$NUM_SPECULATIVE_TOKENS"} \
${SPECULATIVE_MAX_MODEL_LEN:+--speculative-max-model-len "$SPECULATIVE_MAX_MODEL_LEN"} \
${SPECULATIVE_DISABLE_BY_BATCH_SIZE:+--speculative-disable-by-batch-size "$SPECULATIVE_DISABLE_BY_BATCH_SIZE"} \
${NGRAM_PROMPT_LOOKUP_MAX:+--ngram-prompt-lookup-max "$NGRAM_PROMPT_LOOKUP_MAX"} \
${NGRAM_PROMPT_LOOKUP_MIN:+--ngram-prompt-lookup-min "$NGRAM_PROMPT_LOOKUP_MIN"} \
${MODEL_LOADER_EXTRA_CONFIG:+--model-loader-extra-config "$MODEL_LOADER_EXTRA_CONFIG"} \
${PREEMPTION_MODE:+--preemption_mode "$PREEMPTION_MODE"} \
${SERVED_MODEL_NAME:+--served-model-name "$SERVED_MODEL_NAME"} \
${QLORA_ADAPTER_NAME_OR_PATH:+--qlora-adapter-name-or-path "$QLORA_ADAPTER_NAME_OR_PATH"} \
${ENGINE_USE_RAY:+--engine-use-ray} \
${DISABLE_LOG_REQUESTS:+--disable-log-requrests} \
${MAX_LOG_LEN:+--max-log-len "$MAX_LOG_LEN"}
```
{/* prettier-ignore-end */}
</details>
The image built from this Dockerfile will be able to respond to most of the [configuration options for vLLM](https://docs.vllm.ai/en/latest/serving/openai_compatible_server.html#command-line-arguments-for-the-server) by setting environment variables. Any environment variables not provided will use the vLLM default values.
You can also include other files in your vLLM repository that your image can use. One example of this is providing [chat templates](https://docs.vllm.ai/en/latest/serving/openai_compatible_server.html#chat-template) that your model can use.
For example, assuming you have created a template in the root of your vLLM repository at `chat-template.jinja`, you could use a `Dockerfile` like this:
{/* prettier-ignore-start */}
```dockerfile {3,8} copy
FROM vllm/vllm-openai:latest
COPY chat-template.jinja .
ENTRYPOINT python3 -m vllm.entrypoints.openai.api_server \
--port ${PORT:-8000} \
--model ${MODEL_NAME:-google/gemma-2b-it} \
${CHAT_TEMPLATE:+--chat-template "$CHAT_TEMPLATE"} \
${REVISION:+--revision "$REVISION"}
```
{/* prettier-ignore-end */}
During deployment, you would set `CHAT_TEMPLATE` to `./chat-template.jinja` to use your custom template instead of a default template included in your model.
## Conclusion
In this guide, we discussed how to deploy and customize a vLLM Instance on Koyeb to run AI workloads. We started with the [basic vLLM Docker image](https://hub.docker.com/r/vllm/vllm-openai) and redefined the `ENTRYPOINT` to make it simpler to configure during deployment.
Afterwards, we deployed vLLM to Koyeb by building the `Dockerfile` and launching it on Koyeb's GPU Instances. The container image downloads the provided model at runtime and starts up an OpenAI-compatible API server. We showed how to query the models loaded on the server and how to use both the `/v1/completions` and `/v1/chat/completions` endpoints to interact with the model. Finally, we discussed further customization options you might wish to pursue to construct your ideal AI server.
As you continue to explore vLLM, the following resources may be useful:
- [vLLM supported models](https://docs.vllm.ai/en/latest/models/supported_models.html)
- [vLLM server arguments](https://docs.vllm.ai/en/latest/serving/openai_compatible_server.html#command-line-arguments-for-the-server)
- [vLLM examples](https://docs.vllm.ai/en/latest/getting_started/examples/examples_index.html)
| alisdairbr |
1,901,012 | The Future of Software Development: How Generative AI is Transforming IT Jobs | The IT industry is no stranger to rapid advancements and transformative technologies. One of the... | 0 | 2024-06-26T07:21:19 | https://dev.to/kiran_raj_r/the-future-of-software-development-how-generative-ai-is-transforming-it-jobs-51jc | The IT industry is no stranger to rapid advancements and transformative technologies. One of the latest game-changers is Generative AI, a branch of artificial intelligence that can create content, code, and even entire software systems autonomously. This technology is poised to revolutionize the roles of software engineers and developers in several significant ways.
**1. Automation of Routine Tasks**
Generative AI can handle repetitive and mundane coding tasks, such as writing boilerplate code, generating documentation, and even debugging simple issues. This automation allows developers to focus on more complex and creative aspects of software development. By offloading routine tasks to AI, developers can enhance productivity and efficiency, leading to faster project completions and innovation.
**2. Enhanced Code Quality and Consistency**
AI-powered tools can analyze code for potential errors, suggest improvements, and ensure adherence to coding standards. This results in higher code quality and consistency across projects. Developers can rely on AI to catch bugs early in the development process, reducing the time and effort required for testing and debugging.
**3. Accelerated Learning and Skill Development**
Generative AI can serve as a personalized tutor for developers, providing instant feedback and learning resources. By analyzing a developer’s code and identifying areas for improvement, AI can recommend relevant tutorials, documentation, and coding exercises. This accelerates the learning curve for new technologies and programming languages, helping developers stay up-to-date with industry trends.
**4. Innovative Problem-Solving and Creativity**
With AI handling routine tasks, developers have more time to focus on innovative problem-solving and creative aspects of their work. AI can also generate multiple solutions to a problem, offering developers a range of options to choose from. This collaborative approach between human creativity and AI-generated solutions can lead to groundbreaking innovations and more robust software applications.
**5. Shifting Skill Requirements**
As Generative AI becomes more integrated into the software development process, the skill requirements for developers are likely to shift. While traditional coding skills will remain essential, there will be a growing emphasis on understanding AI algorithms, data science, and machine learning principles. Developers will need to adapt to new tools and workflows that incorporate AI, making continuous learning and upskilling crucial.
**6. Creation of New Job Roles**
The rise of Generative AI will also create new job roles within the IT industry. Roles such as AI trainers, AI ethics specialists, and AI maintenance engineers will become increasingly important. These professionals will be responsible for training AI models, ensuring ethical use of AI, and maintaining AI systems to keep them functioning optimally.
**7. Impact on Employment**
While there is a concern that AI might replace some jobs, it is more likely to augment the capabilities of software engineers and developers rather than replace them entirely. By automating repetitive tasks and enhancing productivity, AI can create opportunities for more high-level, strategic, and creative roles. The demand for skilled developers who can work alongside AI will continue to grow, ensuring a positive impact on employment in the long run.
**Conclusion**
Generative AI is set to revolutionize the IT industry, transforming the roles of software engineers and developers. By automating routine tasks, enhancing code quality, accelerating learning, and fostering innovation, AI will enable developers to work more efficiently and creatively. The key to success in this evolving landscape will be adaptability, continuous learning, and embracing the collaborative potential of AI-human partnerships. As the industry evolves, developers who harness the power of Generative AI will be well-positioned to lead the charge in the next wave of technological innovation. | kiran_raj_r | |
1,901,011 | MEAN OR MERN | i think its time to connect with dev community clarify me one thing MERN OR MEAN. | 0 | 2024-06-26T07:21:00 | https://dev.to/barghava_ramudu_5f5fbceb2/mean-or-mern-117 | i think its time to connect with dev community clarify me one thing
MERN OR MEAN. | barghava_ramudu_5f5fbceb2 | |
1,901,009 | Right-aligned bar chart numeric labels | Title Right-aligned display of bar chart numerical labels Description Display... | 0 | 2024-06-26T07:20:03 | https://dev.to/simaq/right-aligned-bar-chart-numeric-labels-3c06 | visactor, vchart | ---
title: Right-aligned bar chart numeric labels
published: true
description:
tags: visactor, vchart
# cover_image: https://direct_url_to_image.jpg
# Use a ratio of 100:42 for best results.
# published_at: 2024-06-26 07:19 +0000
---
## Title
Right-aligned display of bar chart numerical labels
## Description
Display the labels uniformly on the right and align them to the right.
## Solution
You can use the ` extensionMark `property provided by VChart to implement it through custom graphics.
## Code Example
```
const spec = {
type: 'bar',
data: [
{
id: 'barData',
values: [
{
name: 'Apple',
value: 214480
},
{
name: 'Google',
value: 155506
},
{
name: 'Amazon',
value: 100764
},
{
name: 'Microsoft',
value: 92715
},
{
name: 'Coca-Cola',
value: 66341
},
{
name: 'Samsung',
value: 59890
},
{
name: 'Toyota',
value: 53404
},
{
name: 'Mercedes-Benz',
value: 48601
},
{
name: 'Facebook',
value: 45168
},
{
name: "McDonald's",
value: 43417
},
{
name: 'Intel',
value: 43293
},
{
name: 'IBM',
value: 42972
},
{
name: 'BMW',
value: 41006
},
{
name: 'Disney',
value: 39874
},
{
name: 'Cisco',
value: 34575
},
{
name: 'GE',
value: 32757
},
{
name: 'Nike',
value: 30120
},
{
name: 'Louis Vuitton',
value: 28152
},
{
name: 'Oracle',
value: 26133
},
{
name: 'Honda',
value: 23682
}
]
}
],
direction: 'horizontal',
xField: 'value',
yField: 'name',
axes: [
{
orient: 'bottom',
visible: false
}
],
label: {
visible: false
},
extensionMark: [
{
type: 'text',
dataId: 'barData',
visible: true,
style: {
text: datum => datum.value,
fontSize: 12,
x: (datum, ctx) => {
return ctx.getRegion().getLayoutRect().width + 10;
},
y: (datum, ctx) => {
return ctx.valueToY([datum.name]) + ctx.yBandwidth() / 2;
},
textBaseline: 'middle',
textAlign: 'right',
fill: "#1664FF",
fontSize: 12
}
}
]
};
const vchart = new VChart(spec, { dom: CONTAINER_ID });
vchart.renderSync();
// Just for the convenience of console debugging, DO NOT COPY!
window['vchart'] = vchart;
```
## Result
## Related Documents
- Tutorial: https://visactor.io/vchart/guide/tutorial_docs/extend/custom_mark
- API：https://visactor.io/vchart/option/barChart#extensionMark
- Github：https://github.com/VisActor/VChart/ | simaq |
1,901,008 | George Rosen Smith - Institutional Logic Analyst | George Rosen Smith Investors, analysts 18.06.1959 country: Ireland Graduated from the... | 0 | 2024-06-26T07:18:14 | https://dev.to/mrgsmith/george-rosen-smith-institutional-logic-analyst-567d | George Rosen Smith
Investors, analysts
18.06.1959 country: Ireland
Graduated from the California Institute of Technology in 1978
In 1982, he went to Columbia Business School in the United States to study finance.
After receiving his PhD in finance in 1987, he stayed on as a teaching assistant and started working as a lecturer.
Received the title of Associate Professor at Columbia Business School in 1991.
Joined Tiger Securities in 1995 as an analyst
In 1999, he officially became the chief analyst of Tiger Brokers!
In 2010, he joined State Street Global Asset Management as an equity fund operations strategy analyst!
In 2018, he joined State Street Global Advisors as Chief Investment Officer for European Markets
Specialties: market cycle law, market volume-price relationship, institutional reverse logic thinking,
through the attributes of different financial markets, choose the best investment market at the moment,
through the performance of volume and price, find the market capital trend, follow the institution to capture the market detonation point!
Use reasonable capital combination to double quickly. | mrgsmith | |
1,901,006 | The content displayed in the line chart is currently all selected by default. Is it possible to have a channel inversion | Title The content displayed in the line chart is currently all selected and displayed by... | 0 | 2024-06-26T07:17:12 | https://dev.to/simaq/the-content-displayed-in-the-line-chart-is-currently-all-selected-by-default-is-it-possible-to-have-a-channel-inversion-1p63 | visactor, vchart | ---
title: The content displayed in the line chart is currently all selected by default. Is it possible to have a channel inversion
published: true
description:
tags: visactor, vchart
# cover_image: https://direct_url_to_image.jpg
# Use a ratio of 100:42 for best results.
# published_at: 2024-06-26 07:16 +0000
---
## Title
The content displayed in the line chart is currently all selected and displayed by default. Is it possible to have a channel inversion (for example, there is a button that is not displayed with one click)?
## Description
Chart legend can be selected all or not all.
## Solution
You can configure the ` legends.defaultSelected `parameter to an empty array: ` [] `, restore to all selected words, delete this parameter or copy the full amount of legend items.
## Code Example
```
const spec = {
type: 'area',
data: {
values: [
{ type: 'Nail polish', country: 'Africa', value: 4229 },
{ type: 'Nail polish', country: 'EU', value: 4376 },
{ type: 'Nail polish', country: 'China', value: 3054 },
{ type: 'Nail polish', country: 'USA', value: 12814 },
{ type: 'Eyebrow pencil', country: 'Africa', value: 3932 },
{ type: 'Eyebrow pencil', country: 'EU', value: 3987 },
{ type: 'Eyebrow pencil', country: 'China', value: 5067 },
{ type: 'Eyebrow pencil', country: 'USA', value: 13012 },
{ type: 'Rouge', country: 'Africa', value: 5221 },
{ type: 'Rouge', country: 'EU', value: 3574 },
{ type: 'Rouge', country: 'China', value: 7004 },
{ type: 'Rouge', country: 'USA', value: 11624 },
{ type: 'Lipstick', country: 'Africa', value: 9256 },
{ type: 'Lipstick', country: 'EU', value: 4376 },
{ type: 'Lipstick', country: 'China', value: 9054 },
{ type: 'Lipstick', country: 'USA', value: 8814 },
{ type: 'Eyeshadows', country: 'Africa', value: 3308 },
{ type: 'Eyeshadows', country: 'EU', value: 4572 },
{ type: 'Eyeshadows', country: 'China', value: 12043 },
{ type: 'Eyeshadows', country: 'USA', value: 12998 },
{ type: 'Eyeliner', country: 'Africa', value: 5432 },
{ type: 'Eyeliner', country: 'EU', value: 3417 },
{ type: 'Eyeliner', country: 'China', value: 15067 },
{ type: 'Eyeliner', country: 'USA', value: 12321 },
{ type: 'Foundation', country: 'Africa', value: 13701 },
{ type: 'Foundation', country: 'EU', value: 5231 },
{ type: 'Foundation', country: 'China', value: 10119 },
{ type: 'Foundation', country: 'USA', value: 10342 },
{ type: 'Lip gloss', country: 'Africa', value: 4008 },
{ type: 'Lip gloss', country: 'EU', value: 4572 },
{ type: 'Lip gloss', country: 'China', value: 12043 },
{ type: 'Lip gloss', country: 'USA', value: 22998 },
{ type: 'Mascara', country: 'Africa', value: 18712 },
{ type: 'Mascara', country: 'EU', value: 6134 },
{ type: 'Mascara', country: 'China', value: 10419 },
{ type: 'Mascara', country: 'USA', value: 11261 }
]
},
title: {
visible: true,
text: '100% stacked area chart of cosmetic products sales'
},
percent: true,
xField: 'type',
yField: 'value',
seriesField: 'country',
legends: [
{
visible: true,
position: 'middle',
orient: 'bottom',
defaultSelected: []
}
],
axes: [
{
orient: 'left',
label: {
formatMethod(val) {
return `${(val * 100).toFixed(2)}%`;
}
}
}
]
};
const vchart = new VChart(spec, { dom: CONTAINER_ID });
vchart.renderSync();
// Just for the convenience of console debugging, DO NOT COPY!
window['vchart'] = vchart;
```
## Result
## Related Documents
- Tutorial: https://visactor.io/vchart/guide/tutorial_docs/Chart_Concepts/Legend
- API：https://visactor.io/vchart/option/barChart#legends
- Github：https://github.com/VisActor/VChart/ | simaq |
1,886,916 | 4 Ways to Include Comments in JSON | JSON or JavaScript Object Notation is a popular data interchange format used by developers to store... | 0 | 2024-06-13T12:01:18 | https://keploy.io/blog/community/4-ways-to-write-comments-in-json |
JSON or JavaScript Object Notation is a popular data interchange format used by developers to store and exchange data. It's lightweight, easy to read, and easy to parse, making it ideal for various applications. However, one of the notable limitations of JSON is that it doesn't support comments natively. This can be a problem when you want to include explanations, notes, or any sort of annotation within your JSON files.
In this article, we'll explore some practical workarounds to add comments to a JSON file without breaking its structure or causing issues during parsing.
**Understanding JSON and Its Limitations**
JSON is designed to be a minimal and straightforward way to represent structured data. Its simplicity is one of its strengths, but it also means there are some limitations. Unlike other data formats such as XML or YAML, JSON does not support comments. This is because JSON is primarily intended to be a data format, not a document format.
The official JSON specification (RFC 8259) makes it clear that comments are not part of the format. However, developers often find comments useful for documentation, debugging, or simply to make the data more understandable.
Workarounds to Add Comments in JSON
Although JSON doesn't support comments, there are several ways you can include comments in your JSON files without breaking them. Here are some common techniques:
1. Using a "comments" Key
One straightforward method is to include comments as part of the JSON data by using a dedicated key, such as _comment or __note. This key will hold the comment string.
```
{
"name": "John Doe",
"age": 30,
"_comment": "This is a comment about the user object",
"email": "john.doe@example.com"
}
```
This method is simple and keeps the comment close to the relevant data. However, be mindful that any JSON parser or application processing this file should be aware of and ignore these keys.
2. Using Non-standard JSON Parsers
Some JSON parsers and libraries extend the standard JSON format to support comments. For example, libraries like JSON5 and Hjson allow comments and then convert the extended JSON to standard JSON.
JSON5: Allows comments similar to JavaScript (// and /* */).
// This is a comment
{
"name": "John Doe", /* Inline comment */
"age": 30,
"email": "john.doe@example.com"
}
Hjson: A more human-readable version of JSON that supports comments.
{
# This is a comment
name: "John Doe", # Inline comment
age: 30,
email: "john.doe@example.com"
}
Using these libraries can make your JSON files more readable and maintainable, but remember they are not universally supported and require specific parsers.
3. Including Comments in External Documentation
Another approach is to keep the JSON clean and free of comments by maintaining external documentation. This could be in the form of a README file, markdown documents, or even inline comments in the code that generates or processes the JSON.
For example, if you have a JSON configuration file, you could document its structure and each field's purpose in a separate README.md file:
```
# Configuration File Documentation
## Fields
- `name`: The name of the user.
- `age`: The age of the user.
- `email`: The user's email address.
```
This method ensures your JSON remains standard-compliant while still providing the necessary documentation.
4. Embedding Comments in Strings
In some cases, developers embed comments directly within string values. This is not a clean solution, but it can work for small notes.
```
{
"name": "John Doe",
"age": 30,
"email": "john.doe@example.com",
"metadata": "This is a comment about the user object"
}
```
Be cautious with this approach, as it can make your data harder to use programmatically and may confuse other developers.
**Conclusion**
While JSON's lack of native comment support can be a drawback, there are several strategies you can employ to include comments in your JSON files. Each method has its pros and cons, and the best choice depends on your specific use case and the tools you're using. Whether you choose to use a dedicated key, non-standard parsers, external documentation, or embedded strings, it's important to ensure that your comments do not interfere with the functionality of your JSON data.
By following these tips, you can keep your JSON files informative and maintainable, making them easier for yourself and others to understand and work with.
**FAQs**
**Why doesn't JSON support comments?**
JSON was designed to be a lightweight data interchange format with simplicity in mind. Comments are not included in the JSON specification (RFC 8259) because the focus is purely on data representation rather than documentation or annotation. This decision ensures that JSON remains simple and efficient for parsing and processing.
**Can using a "comments" key cause issues with JSON parsing?**
Using a "comments" key like _comment does not break JSON parsing, as it is just another key-value pair. However, it's important to ensure that any application or parser processing your JSON file is designed to ignore or handle these comment keys appropriately. Otherwise, they might be treated as regular data, potentially causing confusion or errors. | keploy | |
1,901,005 | Boost Customer Engagement: WhatsApp Campaigns Enhanced by Divsly | In today’s digital age, staying connected with your customers is more important than ever. With... | 0 | 2024-06-26T07:16:43 | https://dev.to/divsly/boost-customer-engagement-whatsapp-campaigns-enhanced-by-divsly-59bd | whatsappmarketing, whatsappcampaign, whatsappcampaigns | In today’s digital age, staying connected with your customers is more important than ever. With numerous communication channels available, businesses need to find effective and efficient ways to reach their audience. One of the most powerful tools for this purpose is WhatsApp. Combining this with the capabilities of Divsly, a leading tool for managing WhatsApp campaigns, can significantly boost your customer engagement. In this blog, we will explore how WhatsApp campaigns can enhance customer outreach and why [Divsly](https://divsly.com/?utm_source=blog&utm_medium=blog+post&utm_campaign=blog_post) is the best tool to use.
## The Power of WhatsApp for Business
WhatsApp is a widely used messaging app with over 2 billion active users worldwide. Its user-friendly interface, instant messaging capabilities, and global reach make it an excellent platform for businesses to communicate with their customers. Here are some reasons why WhatsApp is an ideal channel for customer outreach:
**Instant Communication:** Messages sent via WhatsApp are delivered instantly, making it perfect for time-sensitive information.
**High Engagement Rates:** WhatsApp messages have high open rates compared to emails, increasing the likelihood that your message will be read.
**Multimedia Support:** You can send text, images, videos, documents, and even voice messages, allowing for versatile communication.
**Personalization:** WhatsApp allows for direct, personalized communication, which can improve customer relationships and satisfaction.
**Global Reach:** With users across the globe, WhatsApp helps businesses reach international audiences effortlessly.
## Why Use Divsly for WhatsApp Campaigns?
Managing a successful WhatsApp campaign can be challenging without the right tools. This is where Divsly comes in. Divsly is a comprehensive tool designed to simplify and optimize [WhatsApp campaigns](https://divsly.com/features/whatsapp-campaigns?utm_source=blog&utm_medium=blog+post&utm_campaign=blog_post). Here are some key features that make Divsly stand out:
**Easy Campaign Management:** Divsly offers an intuitive dashboard that allows you to manage all your WhatsApp campaigns in one place. You can create, schedule, and monitor campaigns effortlessly.
**Automation:** Automate your messaging to save time and ensure consistent communication. Divsly allows you to set up automated responses and scheduled messages.
**Personalization:** With Divsly, you can personalize messages for each recipient, enhancing the customer experience and increasing engagement.
**Analytics and Reporting:** Track the performance of your campaigns with detailed analytics. Divsly provides insights into message delivery rates, open rates, and customer responses, helping you make data-driven decisions.
**Compliance:** Divsly ensures that your campaigns comply with WhatsApp’s policies and regulations, protecting your business from potential issues.
## How to Boost Customer Engagement with WhatsApp Campaigns Powered by Divsly
To effectively boost customer engagement using WhatsApp campaigns and Divsly, follow these steps:
**Build Your Contact List:** Start by gathering contact information from your customers. Make sure to get their consent to receive messages from your business.
**Segment Your Audience:** Divide your contact list into segments based on criteria such as demographics, purchase history, or customer behavior. This allows you to tailor your messages to specific groups.
**Craft Personalized Messages:** Use Divsly’s personalization features to create messages that address the individual needs and preferences of your customers. Personalized messages are more likely to engage recipients.
**Leverage Multimedia Content:** Enhance your messages with images, videos, and other multimedia content. Visual content can capture attention and convey information more effectively than text alone.
**Automate Where Possible:** Use Divsly’s automation capabilities to schedule messages and set up automated responses. This ensures timely communication and frees up your time for other tasks.
**Monitor and Analyze Performance:** Regularly check Divsly’s analytics to see how your campaigns are performing. Use this data to refine your strategy and improve future campaigns.
## Practical Examples of Successful WhatsApp Campaigns
To illustrate the power of WhatsApp campaigns powered by Divsly, let’s look at a few practical examples:
**Product Launch Announcements:** When launching a new product, you can use Divsly to send personalized announcements to your customer segments. Include images and videos of the product to generate excitement and encourage purchases.
**Customer Support:** Provide exceptional customer support by setting up automated responses for common queries. Use Divsly to ensure that customers receive timely and helpful responses.
**Exclusive Offers and Promotions:** Send exclusive offers and promotions to your loyal customers. Personalize the messages to make them feel valued and appreciated.
**Event Invitations:** Invite customers to events such as webinars, workshops, or in-store promotions. Use multimedia content to showcase the event details and encourage attendance.
## Tips for Maximizing the Impact of Your WhatsApp Campaigns
To get the most out of your WhatsApp campaigns with Divsly, keep these tips in mind:
**Respect Customer Privacy:** Always get explicit consent from customers before adding them to your WhatsApp contact list.
Ensure that your messages are respectful and not intrusive.
**Keep Messages Concise:** People are more likely to engage with short, clear, and to-the-point messages. Avoid overwhelming your customers with too much information at once.
**Use a Consistent Brand Voice:** Maintain a consistent brand voice in your messages to build trust and recognition. This helps in reinforcing your brand identity.
**Encourage Interaction:** Prompt customers to respond to your messages. Ask questions, seek feedback, and encourage them to share their thoughts. This two-way communication can strengthen customer relationships.
**Regularly Update Your Contact List:** Keep your contact list updated by regularly adding new customers and removing inactive ones. This ensures that your campaigns reach the right audience.
**Test and Optimize:** Experiment with different types of messages and content formats to see what resonates best with your audience. Use Divsly’s analytics to identify successful strategies and optimize your future campaigns.
## Conclusion
WhatsApp campaigns are a powerful way to enhance customer engagement and build strong relationships with your audience. By leveraging Divsly’s advanced features, you can manage, automate, and personalize your campaigns with ease. Whether you’re announcing a new product, providing customer support, or sending exclusive offers, Divsly ensures that your WhatsApp campaigns are effective and efficient.
Incorporate the tips and strategies outlined in this blog to maximize the impact of your campaigns. With WhatsApp and Divsly working together, you can create meaningful connections with your customers, boost engagement, and drive business growth.
Start using Divsly for your WhatsApp campaigns today and experience the difference it can make in your customer outreach efforts. | divsly |
1,901,004 | How to modify the tag graphic of the tooltip content item | Title How to modify the tag graphic of the tooltip content item? Description I... | 0 | 2024-06-26T07:15:36 | https://dev.to/simaq/how-to-modify-the-tag-graphic-of-the-tooltip-content-item-38pg | visactor, vchart | ---
title: How to modify the tag graphic of the tooltip content item
published: true
description:
tags: visactor, vchart
# cover_image: https://direct_url_to_image.jpg
# Use a ratio of 100:42 for best results.
# published_at: 2024-06-26 07:14 +0000
---
## Title
How to modify the tag graphic of the tooltip content item?
## Description
I want to change the shape in the tooltip to linear for line charts. Is there a good implementation?
## Solution
Modify ` shapeType `to ` 'rect ' `.
## Code Example
```
const spec = {
type: 'bar',
data: [
{
id: 'barData',
values: [
{ month: 'Monday', sales: 22 },
{ month: 'Tuesday', sales: 13 },
{ month: 'Wednesday', sales: 25 },
{ month: 'Thursday', sales: 29 },
{ month: 'Friday', sales: 38 }
]
}
],
tooltip: {
mark: {
content:
[{ key: datum => datum['month'], value: datum => datum['sales'], shapeType: 'rect' }]
}
},
xField: 'month',
yField: 'sales'
};
const vchart = new VChart(spec, { dom: CONTAINER_ID });
vchart.renderSync();
```
## Results show
## Related Documents
- Tutorial: https://visactor.io/vchart/guide/tutorial_docs/Chart_Concepts/Tooltip
- API：https://visactor.io/vchart/option/barChart#tooltip.dimension.content(Object%7CObject%5B%5D).shapeType
- Github：https://github.com/VisActor/VChart/ | simaq |
1,901,003 | Linux “ls” Command RHEL 9 | List files using ls with no option ls with no option list files and directories in a bare format... | 0 | 2024-06-26T07:14:15 | https://dev.to/mahir_dasare_333/linux-ls-command-rhel-9-aki | 1. List files using ls with no option
ls with no option list files and directories in a bare format where we won’t be able to view
details like file types, size, modified date and time, permission and links etc.
**ls**
2. List Files with option -l
Here, ls -l (-l is a character not one) shows file or directory, size, modified date and time, file
or folder name and owner of the file and its permission.
**ls -l**
3. View Hidden Files
List all files including hidden files starting with “ls -a”.
**ls -a**
4. List Files with Human Readable Format with option -lh
With a combination of -lh option, it shows sizes in a human-readable format.
**ls -lh**
5. List Files and Directories with ‘/’ Character at the end
Using -F option with ls command will add the ‘/’ Character at the end of each directory.
**ls -F**
6. List Files in Reverse Order
The following command with ls -r option displays files and directories in reverse order.
**ls -r**
7. Recursively list Subdirectories
ls -R option will list very long listing directory trees. See an example of the output of the
command.
**ls -R**
8. Reverse Output Order
With the combination of -ltr it will show the latest modification file or directory date as last.
**ls -ltr
ls -ltra**
9. Sort Files by File Size
With the combination of -lS displays file size in order, it will display big at first.
**ls -lS
ls -lSa**
10. The display Inode number of File or Directory
We can see some numbers printed before the file/directory name. With -i options list
file/directory with an inode number.
**ls -ia**
| mahir_dasare_333 | |
1,901,002 | Leveraging Mixins in Ruby on Rails: A Deep Dive | Ruby on Rails is known for its elegance and productivity. One of the powerful tools in Ruby that... | 0 | 2024-06-26T07:13:50 | https://dev.to/afaq_shahid/leveraging-mixins-in-ruby-on-rails-a-deep-dive-5h0a | webdev, ruby, rails, beginners |
Ruby on Rails is known for its elegance and productivity. One of the powerful tools in Ruby that makes Rails development so flexible and clean is Mixins. In this article, we'll explore what Mixins are, how they work, and how you can use them to keep your Rails codebase DRY (Don't Repeat Yourself).
### What are Mixins?
Mixins are a way to share reusable code across multiple classes in Ruby. They are modules that can be included in other classes to provide them with additional functionality without using inheritance. This allows you to keep your classes focused and your codebase modular.
### Why Use Mixins?
1. **Code Reusability**: Mixins allow you to reuse common functionality across different classes.
2. **Separation of Concerns**: By moving common methods into modules, you can keep your classes smaller and more focused.
3. **Avoiding Inheritance Pitfalls**: Instead of relying on complex inheritance hierarchies, you can use Mixins to share behavior across unrelated classes.
### Creating a Mixin
Let's start by creating a simple Mixin. Imagine you have several models in your Rails application that need the ability to generate a unique token. Instead of duplicating the token generation code in each model, you can create a Mixin.
```ruby
# app/models/concerns/tokenizable.rb
module Tokenizable
extend ActiveSupport::Concern
included do
before_create :generate_token
end
def generate_token
self.token = SecureRandom.hex(10)
end
end
```
### Using the Mixin
Now that we have our `Tokenizable` module, we can include it in any model that needs this functionality.
```ruby
# app/models/user.rb
class User < ApplicationRecord
include Tokenizable
end
# app/models/order.rb
class Order < ApplicationRecord
include Tokenizable
end
```
### ActiveSupport::Concern
In the example above, we used `ActiveSupport::Concern` to define our Mixin. `ActiveSupport::Concern` makes it easier to write Mixins by providing a structured way to include class methods and instance methods.
Here's an example that also includes class methods:
```ruby
# app/models/concerns/tokenizable.rb
module Tokenizable
extend ActiveSupport::Concern
included do
before_create :generate_token
end
class_methods do
def find_by_token(token)
find_by(token: token)
end
end
def generate_token
self.token = SecureRandom.hex(10)
end
end
```
Now you can call `User.find_by_token(token)` or `Order.find_by_token(token)` thanks to the class method defined in the Mixin.
### Real-World Example: Timestampable
Let's look at a more practical example. Suppose you want to add a custom timestamp to multiple models in your application. You can create a `Timestampable` module.
```ruby
# app/models/concerns/timestampable.rb
module Timestampable
extend ActiveSupport::Concern
included do
before_save :set_custom_timestamp
end
def set_custom_timestamp
self.custom_timestamp = Time.current
end
end
```
Include this Mixin in your models:
```ruby
# app/models/post.rb
class Post < ApplicationRecord
include Timestampable
end
# app/models/comment.rb
class Comment < ApplicationRecord
include Timestampable
end
```
Now, both `Post` and `Comment` models will automatically set a custom timestamp before saving.
### Conclusion
Mixins are a powerful feature in Ruby that can help you keep your Rails codebase clean, DRY, and modular. By encapsulating reusable code in modules and including them in your classes, you can avoid code duplication and manage shared behavior more effectively.
Whether you're a seasoned Rails developer or just getting started, mastering Mixins will undoubtedly make your code more maintainable and elegant. Happy coding!
| afaq_shahid |
1,901,001 | How the word cloud fills the outer container display | Title How to display a word cloud on top of the outer container? ... | 0 | 2024-06-26T07:13:03 | https://dev.to/simaq/how-the-word-cloud-fills-the-outer-container-display-2f6n | vchart, visactor | ---
title: How the word cloud fills the outer container display
published: true
description:
tags: vchart, visactor
# published_at: 2024-06-26 07:11 +0000
---
## Title
How to display a word cloud on top of the outer container?
## Description
We have a relatively small scene displaying word clouds, hoping to make the word cloud fill the entire container as much as possible. I tried the official website, but it seems that it cannot fill the container
## Solution
This is because in VChart, the word cloud is defaulted to use ` 'circle ' `circular markShape mask graphics, if you want to fill the container as much as possible, you can use ` 'rect' `shape.
## Code example
```
const spec = {
type: 'wordCloud',
nameField: 'Keyword',
valueField: 'Score',
data: {
name: 'baseData',
values: [ { "Keyword": "预期寿命", "Score": 0.8571 }, { "Keyword": "心率", "Score": 0.8571 }, { "Keyword": "疾病", "Score": 0.7597 }, { "Keyword": "心跳快慢", "Score": 0.5714 }, { "Keyword": "心跳", "Score": 0.5714 }, { "Keyword": "郭艺芳", "Score": 0.5624 }, { "Keyword": "陈清勇", "Score": 0.5624 }, { "Keyword": "风险因素", "Score": 0.4874 }, { "Keyword": "心动过速", "Score": 0.4874 }, { "Keyword": "寿命", "Score": 0.3849 }, { "Keyword": "快慢", "Score": 0.3844 }, { "Keyword": "生活习惯", "Score": 0.2857 }, { "Keyword": "河北省人民医院", "Score": 0.2857 }, { "Keyword": "四川大学华西医院", "Score": 0.2186 }, { "Keyword": "华西医院", "Score": 0.2121 }, { "Keyword": "阿尔茨海默病", "Score": 0.2067 }, { "Keyword": "人群", "Score": 0.1984 }, { "Keyword": "痴呆", "Score": 0.19 }, { "Keyword": "研究", "Score": 0.1761 }, { "Keyword": "健康", "Score": 0.1754 }, { "Keyword": "习惯", "Score": 0.1709 }, { "Keyword": "医院", "Score": 0.1664 }, { "Keyword": "风险", "Score": 0.1647 }, { "Keyword": "心内科", "Score": 0.16 }, { "Keyword": "生活", "Score": 0.158 }, { "Keyword": "工作", "Score": 0.1554 }, { "Keyword": "心血管疾病", "Score": 0.1299 }, { "Keyword": "咖啡", "Score": 0.0974 }, { "Keyword": "志飞", "Score": 0.0974 }, { "Keyword": "中国妇女报", "Score": 0.0974 }, { "Keyword": "人民医院", "Score": 0.0913 } ]
},
maskShape: 'rect',
width: 400,
height: 300,
background: '#cccc',
padding: 10
};
const vchart = new VChart(spec, { dom: CONTAINER_ID });
vchart.renderSync();
// Just for the convenience of console debugging, DO NOT COPY!
window['vchart'] = vchart;
```
## Results show
## Related Documents
- Tutorial: https://visactor.io/vchart/guide/tutorial_docs/Chart_Types/WordCloud
- API：https://visactor.io/vchart/option/wordCloudChart#type
- Github：https://github.com/VisActor/VChart/ | simaq |
1,882,297 | The Basics of WEBPACK | Have you ever run into a problem where you tried to email or send some data to someone and you got a... | 0 | 2024-06-09T19:07:41 | https://dev.to/gagecantrelle/the-basics-of-webpack-2d71 | Have you ever run into a problem where you tried to email or send some data to someone and you got a warning that the data you are trying to send over is too big? What you're trying to send over could be as simple as a 1-minute cute dog/cat video. Well, you are not the only one. Websites can run into similar problems as well. When you open a website it will request everything from the server hosting that website. That site could be made with multiple files of code ranging from CSS, JPG, HTML, and more. Unfountly, most browsers can’t handle multiple files being requested. Normally, for sending data that is too big, you will zip/compact the data into smaller ones. This can not be done with a website since that data and what files connect to each other are too big. Luckily there’s an open-source module you can use to zip/bundle your data into a small single file, WEBPACK.
**Fun Facts**
It was released on February 19, 2014, with the most stable version released on March 20, 2024. Webpack is a free and open-source module bundler, which as I said in the first paragraph, bundles code, making projects with multiple files much easier for the browser to receive when requested, and much faster to load. Most developers will use this blunder when they are making a website. Another reason developers like this blunder is because it is not too hard to set up and install.
**Let Start Coding**
For starters, we will set the Webpack up using React so make sure you have React and React-dom installed. After that, we want to install a couple of other modules installed as dev dependencies, because what we are installing will be used for the developer to build his code.
```
npm install webpack webpack-cli webpack-dev-server --save-dev
npm install html-webpack-plugin --save-dev
npm install @babel/core babel-loader --save-dev
npm install @babel/preset-env @babel/preset-react --save-dev
```
Now let's create our file and call it webpack.config.js and start coding. First, we need to require ‘path’ a native NodeJs module that helps concatenate a file path, then we need to export an object with an entry and output path. This will tell it what file to bundle and where to send it after bundling it. Then inside the entry key, we need to give it a directory path, the path to where we want to bundle our code, and the file name itself. For output, it’s the same but the path for where to find the file will become where to put the file, and there is no need to give it a third parameter. In output, give it a filename key and it will create a file with the name given, and give it the bundle code. If no filename key is given, then that name will be given to the output path key as the third parameter. Instead of a file being created, it will create a folder with that name instead, containing our bundle code.
```
Const path = require ('path')
Module.export{
Entry: path.join(__dirname, "src", "index.js"),
Output:{
Filename: "bundle.js"
path.join(__dirname, "dist", "bundle"),
}
}
```
Next, we need to tell Webpack to use some plugins since normally it can only use Javascript by default. It is set up similarly to how we set up the entry key. This also allows webpack to interact with the script tag in the HTML file.
```
Const path = require ('path')
Module.export{
Entry: path.join(__dirname, "src", "index.js"),
Output:{
Filename: "bundle.js"
path.join(__dirname, "dist", "bundle"),
},
plugins: [
new HtmlWebpackPlugin({
template: path.join(__dirname, "src", "index.html"),
}),
],
}
```
Now that we have our plugging we now set some rules for Webpack to follow when bundling our code. In this example, we will be using Bable and tell it to only use specific files like jsx.
```
Const path = require ('path)
Module.export{
Entry: path.join(__dirname, "src", "index.js"),
Output:{
Filename: "bundle.js"
path.join(__dirname, "dist", "bundle"),
},
module: {
rules: [
{
test: /\.?jsx$/,
exclude: /node_modules/,
use: {
loader: "babel-loader",
}
},
]
},
plugins: [
new HtmlWebpackPlugin({
template: path.join(__dirname, "src", "index.html"),
}),
],
}
```
Since Bable is a transpirer, we need to tell it what to transpile by giving it an options key with a present key holding some of the things we installed at the beginning.
```
Const path = require ('path)
Module.export{
Entry: path.join(__dirname, "src", "index.js"),
Output:{
Filename: "bundle.js"
path.join(__dirname, "dist", "bundle"),
},
module: {
rules: [
{
test: /\.?jsx$/,
exclude: /node_modules/,
use: {
loader: "babel-loader", options: {
presets: ['@babel/preset-env', '@babel/preset-react']
}
}
},
]
},
plugins: [
new HtmlWebpackPlugin({
template: path.join(__dirname, "src", "index.html"),
}),
],
}
```
Finally, in your package.json file make some script commands to run webpack server and bundle our code.
```
"scripts": {
"dev": "webpack serve",
"build": "weback",
...
}
```
Also, if you are curious, bable can set rules in Webpack to be able to bundle SVG, images, and CSS files too. Now that you know what webpack is, you probably want to add it to your next web development project, seeing as how it is not too hard to set up and install, perfect for any size project from big to small. Give it a try if you're interested in trying webpack out.
//links
https://medium.com/age-of-awareness/setup-react-with-webpack-and-babel-5114a14a47e9#bb4c
https://www.digitalocean.com/community/tutorials/nodejs-how-to-use__dirname
https://www.youtube.com/watch?v=5zeXFC_-gMQ&t=1s
https://www.youtube.com/watch?v=rI37HS-Vj8A&list=PLzAGFfNx
| gagecantrelle | |
1,901,000 | 5 Best Websites for Free Jekyll Templates | This is a roundup of the best websites where you can find and download free Jekyll templates. These... | 0 | 2024-06-26T07:12:15 | https://dev.to/devluc/5-websites-for-free-jekyll-themes-and-templates-1gn | webdev, frontend, html, css | This is a roundup of the best websites where you can find and download free Jekyll templates. These high quality items will power up your websites, landing pages, blogs, directories and ecommerce projects.
There are many template creators in the online space. Here is why those mentioned below stand out from the crowd:
- Templates are offered free for both personal and commercial use
- Items look modern and are presented with the mandatory Live Preview
- You are not required more than an email address or signup to download
## HTMLrev
[](https://htmlrev.com/)
[HTMLrev](https://htmlrev.com/) (free) showcases the best curated free Jekyll templates from generous creators around the world. You will find a large assortment of websites, landing pages, blog and ecommerce templates. Items are manually checked and updated to maintain a reliable inventory.
**Features**
- Showcases the best templates created by top makers
- Constantly updated with the latest releases
- Easy to browse through categories
---
## Themefisher
[](https://themefisher.com/)
[Themefisher](https://themefisher.com/) (free + paid) is a template marketplace that offers free and pro packages structured on various framework categories for web developers. The free Jekyll templates are creatively designed and provide multiple page for blogs and agencies.
**Features**
- Well designed templates with multiple pages
- Easy to navigate presentation website
---
## Zerostatic
[](https://www.zerostatic.io/)
[Zerostatic](https://www.zerostatic.io/) (free + paid) offers a couple of free Jekyll templates that are beautifully designed and well structured. They're packaged with multiple page examples to help developers get their projects online faster. Covered use cases are startup website and blog.
**Features**
- Awesome layouts created by design-savvy developer
- Multiple pages, sections and components
---
## Bootstrap Starter
[](https://bootstrapstarter.com/)
[Bootstrap Starter](https://bootstrapstarter.com/) (free) provides an awesome selection of free Jekyll templates that represent solid foundations for developer projects. Designs are creative, modern and have vivid color schemes. They're offered with multiple pages and advanced components for directories and blogs.
**Features**
- Beautifully design with attention to details
- Easy to customize and deploy live
---
To assemble this roundup I've went through all imaginable online sources where templates can be found. I hope it makes your work easier. | devluc |
1,900,999 | LLD- In Memory Database Python | Problem Statement: The objective is to design and implement an in-memory SQL-like database, which... | 0 | 2024-06-26T07:08:55 | https://dev.to/dipesh_2301_kumar/lld-in-memory-database-python-1e9p | python, lld, systemdesign, solidprinciples | **Problem Statement:**
The objective is to design and implement an in-memory SQL-like database, which should support the following set of operations/functionality:
- It should be possible to create, or delete tables in a database.
- A table definition comprises columns which have types. They can also have constraints. The supported column types are string and int.
- Users can give the constraint of string type that can have a maximum length of 20 characters.
- Users can give the constraint of int type that can have a minimum value of 1024.
- Support for mandatory fields
- It should be possible to insert records in a table.
- It should be possible to print all records in a table.
- It should be possible to filter and display records whose column values match a given value.
**Requirements Analysis**
- Database Operations:
> Create, update, or delete tables.
- Table Definition:
> Tables consist of columns with types and optional constraints.
Supported column types: string (max length 20) and int (min value 1024).
Support for mandatory fields.
- Data Operations:
> Insert records into a table.
Print all records in a table.
Filter and display records based on column values matching a given value.
**Class Diagram**:
**Database**: Manages multiple tables.
**Table**: Contains columns and records.
**Column**: Abstract base class for StringColumn and IntColumn.
**StringColumn**: Represents a column of type string with optional constraints.
**IntColumn**: Represents a column of type int with optional constraints.
**Record**: Represents a record (row) in a table.
**Implementation:**
```
from abc import ABC,abstractmethod
class ColumnType:
STRING="string"
INT="int"
class Column(ABC):
def __init__(self,name,column_type,required=False):
self.name=name
self.column_type=column_type
self.required=required
@abstractmethod
def validate(self,value):
pass
class StringColumn(Column):
MAX_LENGTH=20
def __init__(self,name,required=False):
super().__init__(name,ColumnType.STRING,required)
def validate(self,value):
if not isinstance(value,str):
return False
if len(value)>self.MAX_LENGTH:
print("Max length exceeeded !!")
return False
return True
class IntColumn(Column):
MAX_LENGTH=1024
MIN_LENGTH=-1024
def __init__(self,name,required=False):
super().__init__(name,ColumnType.INT,required)
def validate(self,value):
if not isinstance(value,int):
return False
if len(value)<self.MIN_LENGTH or len(value)>self.MAX_LENGTH:
print("Min or Max length exceeeded !!")
return False
return True
class Record:
def __init__(self,values):
self.values=values
class Table:
def __init__(self,name):
self.name=name
self.columns={}
self.records=[]
def add_column(self,column):
self.columns[column.name]=column
def insert_record(self,values):
record=Record(values)
for column_name,column_obj in self.columns.items():
if column_obj.required and column_name not in values:
raise Exception(f"Missing required column '{column_name}' in record.")
self.records.append(record)
def print_records(self):
for record in self.records:
print(record.values)
def filter_records(self,column_name,value):
filtered_records=[]
for record in self.records:
if column_name in record.values and record.values[column_name]==value:
filtered_records.append(record.values)
return filtered_records
class Database:
def __init__(self):
self.tables={}
def create_table(self,table_name):
if table_name in self.tables:
raise Exception(f"table {table_name} already exists !!")
self.tables[table_name]=Table(table_name)
def delete_table(self,table_name):
if table_name not in self.tables:
raise Exception(f"table {table_name} does not exist !!")
del self.tables[table_name]
def get_table(self,table_name):
if table_name not in self.tables:
raise Exception(f"table {table_name} does not exists !!")
return self.tables[table_name]
if __name__=="__main__":
db=Database()
db.create_table("Employees")
print(db.tables)
db.get_table("Employees").add_column(StringColumn("Username",required=True))
db.get_table("Employees").add_column(IntColumn("age",required=True))
db.get_table("Employees").insert_record({"Username":"Alice","age":27})
db.get_table("Employees").insert_record({"Username":"bob","age":28})
db.get_table("Employees").insert_record({"Username":"Carl","age":20})
print("All records in 'users' table:")
db.get_table("Employees").print_records()
filtered_records = db.get_table("Employees").filter_records("Username", "Carl")
print("\nFiltered records where name is 'Carl':")
for record in filtered_records:
print(record)
```
Output:
**SOLID Principles:**
> Single Responsibility Principle: Each class has a clear and single responsibility (e.g., Database manages tables, Table manages columns and records).
> Open/Closed Principle: Code is open for extension (e.g., adding new column types) but closed for modification.
> Liskov Substitution Principle: Subclasses (StringColumn, IntColumn) can be substituted for their base class (Column).
> Interface Segregation Principle: No explicit interfaces in Python, but classes are designed to expose necessary methods (validate for columns, CRUD operations for tables).
> Dependency Inversion Principle: High-level modules (e.g., Database, Table) depend on abstractions (Column), not concretions.
This implementation provides a basic in-memory SQL-like database system in Python, fulfilling the given requirements while adhering to OOP and SOLID principles.
| dipesh_2301_kumar |
1,900,998 | The Evolution and Impact of Digital Marketing | In the rapidly evolving landscape of business and commerce, digital marketing has emerged as a... | 0 | 2024-06-26T07:06:28 | https://dev.to/mishukseo/the-evolution-and-impact-of-digital-marketing-44d7 |
In the rapidly evolving landscape of business and commerce, [digital marketing](https://dev-mishuk.pantheonsite.io/) has emerged as a transformative force, reshaping how companies connect with their audiences and drive growth. As traditional methods gradually give way to more agile and data-driven approaches, understanding the intricacies and impact of digital marketing becomes essential for businesses aiming to thrive in the digital age.
** The Rise of Digital Marketing**
Digital marketing encompasses a broad range of activities aimed at promoting products and services through digital channels. Its rise can be attributed to several key factors:
1. Internet Penetration: The widespread availability of the internet globally has provided businesses with unprecedented access to consumers.
2. Technological Advancements: Innovations in technology have enabled more targeted and personalized marketing efforts, leveraging data analytics and automation.
3. Changing Consumer Behavior: Increasingly, consumers are turning to digital platforms for product research, shopping, and social interaction, making digital marketing channels more relevant and effective.
**Key Components of Digital Marketing**
[Digital marketing](https://dev-mishuk.pantheonsite.io/
) strategies often include a combination of the following components:
1. Search Engine Optimization (SEO): Optimizing websites and content to improve visibility in search engine results, driving organic traffic.
2. Pay-Per-Click (PPC) Advertising: Placing ads on search engines and other platforms where advertisers pay a fee each time their ad is clicked, directing traffic to their websites.
3. Social Media Marketing: Leveraging social media platforms to engage with audiences, build brand awareness, and drive website traffic.
4. Content Marketing: Creating and distributing valuable, relevant, and consistent content to attract and retain a clearly defined audience.
5. Email Marketing: Sending commercial messages to a group of people using email to promote products or services, build customer relationships, or drive conversions.
6. Analytics and Data-driven Marketing: Utilizing tools and technologies to analyze consumer behavior, measure campaign effectiveness, and optimize marketing strategies in real-time.
**The Impact on Businesses
**
The adoption of digital marketing strategies has revolutionized the way businesses operate and engage with customers:
1. Global Reach: Digital marketing enables businesses to reach a global audience, breaking down geographical barriers and expanding market reach.
2. Cost Efficiency: Compared to traditional marketing methods, digital marketing often offers a higher return on investment (ROI) due to its ability to target specific demographics and track performance metrics accurately.
3. Personalization: Through data analytics, businesses can personalize marketing messages and offerings based on consumer preferences and behavior, enhancing customer experience and loyalty.
4. Real-time Engagement: Digital platforms facilitate immediate and direct interaction with customers, allowing businesses to respond to inquiries, resolve issues, and capitalize on opportunities in real-time.
5. Measurable Results: Unlike traditional marketing, digital marketing campaigns can be meticulously measured and analyzed, providing valuable insights into what works and what needs improvement.
**
Challenges and Considerations**
Despite its numerous benefits, digital marketing also presents challenges that businesses must navigate:
1. Digital Saturation: The sheer volume of digital content and advertisements can make it challenging for businesses to stand out and capture consumer attention effectively.
2. Technological Complexity: Keeping pace with rapid technological advancements and evolving digital platforms requires continuous learning and adaptation.
3. Data Privacy Concerns: Heightened awareness of data privacy issues necessitates transparent and ethical practices in data collection, usage, and storage.
4. Skill Gap: The demand for digital marketing expertise has created a competitive job market, highlighting the importance of hiring and retaining skilled professionals.
**Future Trends in Digital Marketing**
Looking ahead, several trends are expected to shape the future of digital marketing:
1. Artificial Intelligence (AI) and Machine Learning: AI-powered tools will increasingly automate and optimize marketing processes, from personalized content recommendations to predictive analytics.
2. Voice Search Optimization: As voice-activated devices become more prevalent, optimizing content for voice search will become crucial for SEO and content strategies.
3. Augmented Reality (AR) and Virtual Reality (VR): These technologies will transform the consumer experience, allowing businesses to create immersive and interactive marketing campaigns.
4. Sustainability and Ethical Marketing: Consumers are placing greater emphasis on sustainability and ethical practices, prompting businesses to align their marketing efforts with social responsibility.
** Conclusion**
Digital marketing has undoubtedly reshaped the way businesses engage with consumers, offering unprecedented opportunities for growth and innovation. By leveraging the power of digital channels, businesses can reach their target audiences more effectively, drive meaningful engagement, and achieve measurable results. As technology continues to evolve and consumer behaviors shift, staying agile and adaptive will be key to harnessing the full potential of digital marketing in the years to come.
[](url) | mishukseo | |
1,900,997 | Java Script Interview Secret : "console.log([1, 2] + [3, 4])" | I recently wrote an article on Medium about Java Script Secret Check it out to learn more! | 0 | 2024-06-26T07:06:05 | https://dev.to/itsjp/java-script-interview-secret-consolelog1-2-3-4-j55 | javascript, webdev, programming, interview | I recently wrote an article on Medium about [Java Script Secret ](https://medium.com/@robert.clave.official/java-script-interview-secret-console-log-1-2-3-4-48388d783086)
Check it out to learn more! | itsjp |
1,900,996 | MAURITIUS Tour Packages | With I Need Trip | Best Deal | Beaches, sure, however what else could there have been to do in Mauritius? You would have seen the... | 0 | 2024-06-26T07:05:06 | https://dev.to/ineedtrip/mauritius-tour-packages-with-i-need-trip-best-deal-ko9 | Beaches, sure, however what else could there have been to do in Mauritius? You would have seen the ideal palm fringed shoreline in numerous magazines, however a great deal of Mauritius' other magical elements had been presented by the glossy brochures, to such an extent you will be astonished and enamored by this small island heaven from the second you look.
For some individuals, the initial thing that comes into their mind about Mauritius is its beaches. Concealed toward the east of Madagascar, encompassed by the mild Indian Ocean, it is the original tropical island. It brags sensational volcanic peaks, rich vegetation and more than 160 kilometers of shoreline, dabbed with picture-perfect beaches. For a breathtaking vacation experience Mauritius tour package would be the perfect choice.
[ MAURITIUS Tour Packages]( https://www.ineedtrip.com/tour-destination/mauritius/) | ineedtrip | |
1,900,910 | CodeConductor.AI vs. Microsoft AutoDev: Which Will Transform Your Coding Career? | Undeniably, AI-driven development platforms are reshaping how software is built. While many options... | 0 | 2024-06-26T07:01:56 | https://dev.to/edward_simmons87/codeconductorai-vs-microsoft-autodev-which-will-transform-your-coding-career-46o8 | webdev, ai, softwaredevelopment, softwareengineering |
Undeniably, AI-driven development platforms are reshaping how software is built. While many options exist, [CodeConductor.AI ](https://codeconductor.ai/)and [Microsoft AutoDev ](https://marketplace.visualstudio.com/items?itemName=Phodal.autodev) stand out as two powerful contenders.
This blog delves into each platform’s features, advantages, and potential drawbacks. It ultimately provides insights into which may better serve your development needs.
So, without further ado, let’s look at both AI software development platforms.
## CodeConductor.AI
CodeConductor.AI is an innovative AI software development platform that empowers developers to create production-ready code in a fraction of the time. It simplifies the development process by automating backend structuring, data modeling, and architectural design.
With a user-friendly interface, CodeConductor.AI is accessible to developers of all skill levels, making it an attractive option for startups and small businesses looking to reduce development time and costs.
**<u>Features</u>:**
- AI-Driven Code Generation:
CodeConductor.AI generates a significant portion of the code, reducing the time spent on generic functionalities and allowing developers to focus on customized code for further enhancements that deliver real value.
- Rapid Prototyping and Iteration:
This enables developers to transform their ideas into functional apps within minutes, iterate within hours, and be launch-ready within days.
- High-Quality, Consistent Code:
CodeConductor ensures that the generated code is clean, consistent, and adheres to best practices, resulting in higher-quality software that is easier to maintain and extend.
- Integrated Functional Experts:
Collaborates with functional experts throughout the development process to ensure that the software meets business needs.
- Zero-Touch Cloud Deployment:
Deploys websites and apps seamlessly to the cloud, reducing errors and vulnerabilities for a flawless user experience.
**<u>Advantages:</u>**
1. Efficiency: Drastically reduces the time required to develop and deploy software.
2. Cost-Effective: CodeConductor offers flexible and customizable pricing plans, including a [free demo ](https://codeconductor.ai/demo/?utm_source=devto&utm_medium=link&utm_campaign=offpage-lead)and enterprise-level options. It reduces development costs by up to 80% through its cost-effective and efficient pricing structure.
3. Flexibility: Can be used to develop various types of software, including websites, [web apps](https://dev.to/t/webapp), [SaaS](https://dev.to/t/saas), landing pages, e-commerce marketplace, etc.
**<u>Drawbacks:</u>**
1. Less Popular: It is new in the market. So it is less popular.
## Microsoft AutoDev
Microsoft AutoDev is the latest Microsoft’s creation. It is a cutting-edge AI-powered development platform designed to streamline the software development process.
Leveraging the robust infrastructure of Microsoft, AutoDev integrates seamlessly with tools like [Azure](https://azure.microsoft.com/), [Visual Studio](https://visualstudio.microsoft.com/), and [GitHub](https://github.com/).
This platform is built to automate code generation, project management, and deployment, offering developers a comprehensive suite of tools to enhance productivity and efficiency.
**<u>Features
</u>**
- Integration with Microsoft Ecosystem:
Microsoft AutoDev integrates seamlessly with existing tools and workflows, ensuring a smooth transition for developers. It offers customized tools, collaborative AI agents, and a secure evaluation environment.
- Automation Capabilities:
Microsoft AutoDev can automate multiple routine development tasks, including code generation, testing, builds, deployments, and infrastructure provisioning. It allows developers to focus on more complex projects and strategic aspects.
- Project Management:
In addition to its automation features, Microsoft AutoDev also includes comprehensive [project management tools](https://dev.to/arafat4693/5-project-management-tools-to-boost-your-productivity-2d20), such as features for project tracking, bug reporting, and version control. It helps streamline the overall development workflow and improve collaboration among team members.
- Workflow Automation:
Microsoft AutoDev's workflow automation capabilities allow it to understand the software project requirements deeply. It can then break down these complex tasks into smaller, more manageable jobs or subtasks. AutoDev then efficiently coordinates the execution of these individual jobs, ensuring that the overall project is completed in a streamlined and organized manner.
**<u>Advantages:
</u>**
1. Robust Ecosystem: The extensive Microsoft ecosystem provides a cohesive environment for development, testing, and deployment.
2. Scalability: Designed to handle projects of various sizes, from small apps to large enterprise solutions.
3. Security: Built-in security features leveraging Microsoft's expertise in [cybersecurity](https://dev.to/t/cybersecurity).
**<u>Drawbacks:
</u>**
1. Complexity: The integration of multiple tools can be overwhelming for beginners.
2. Cost: Licensing and subscription fees can be high, especially for smaller teams or startups.
## Head-to-Head Comparison
**<u>Integration and Ecosystem:</u>**
**Microsoft AutoDev:** Scores high due to its seamless integration with other [Microsoft tools](https://dev.to/salmankhan2389/49-best-microsoft-teams-apps-to-boost-productivity-2024-33e9), providing a comprehensive development environment.
**CodeConductor.AI:** While it offers essential tools for development, it lacks the extensive ecosystem of Microsoft.
**<u>Ease of Use:</u>**
**Microsoft AutoDev:** This might be challenging for newcomers due to its complexity and the breadth of tools available.
**CodeConductor.AI:** Prioritizes user-friendliness, making it accessible for developers with varying levels of experience.
**<u>Development Speed:</u>**
**Microsoft AutoDev:** Provides efficient tools but may require more time to learn and integrate various components.
**CodeConductor.AI:** Excels in rapid development, delivering production-ready code in minutes.
**<u>Cost:</u>**
**Microsoft AutoDev:** This can be expensive, particularly for smaller teams or individual developers.
**CodeConductor.AI:** More cost-effective, appealing to startups and smaller businesses.
**<u>Flexibility and Scalability:</u>**
**Microsoft AutoDev:** Highly scalable, suitable for projects of all sizes, from small apps to large enterprise solutions.
**CodeConductor.AI:** Flexible for various types of software development but might face limitations in extremely large projects.
## Impact on Developer Jobs
Both Microsoft AutoDev and CodeConductor.AI have the potential to automate many aspects of [software development](https://dev.to/mmainulhasan/modern-software-development-practices-terms-and-trends-2mop), leading to increased efficiency and productivity.
However, this automation might raise concerns about job displacement. Here’s a balanced view:
**Microsoft AutoDev:** With its complexity and integration capabilities, it is more likely to enhance developer roles by automating repetitive tasks while requiring human oversight and expertise for complex problem-solving.
**CodeConductor.AI:** By significantly reducing development time and costs, it empowers developers to focus on creative and strategic aspects of projects. However, its efficiency might also reduce the demand for traditional coding roles.
## Conclusion
Choosing between Microsoft AutoDev and CodeConductor.AI depends on your specific needs and priorities. Microsoft AutoDev offers a robust, integrated environment ideal for large-scale projects within the Microsoft ecosystem.
In contrast, CodeConductor.AI provides a user-friendly, cost-effective solution perfect for rapid development and smaller teams.
Ultimately, while both platforms might automate certain aspects of software development, they also open new opportunities for developers to engage in higher-level, more creative tasks.
Embracing these tools could lead to more innovative and efficient development processes, ensuring that developers remain indispensable in the evolving tech landscape. | edward_simmons87 |
1,900,995 | Taming the Content Chaos: Your One-Stop Shop for Streamlined Brand Management | Do you ever feel like your brand assets are scattered across the digital wilderness? Logos in a dozen... | 0 | 2024-06-26T07:00:46 | https://dev.to/blogsx/taming-the-content-chaos-your-one-stop-shop-for-streamlined-brand-management-e4k | brandmanagement, complyai, digitalassetmanagement | Do you ever feel like your brand assets are scattered across the digital wilderness? Logos in a dozen different formats, marketing materials with outdated fonts, and endless email threads filled with "final, final_v2, final_final..." versions?
**You're not alone.**
Maintaining brand consistency across a multitude of channels can be a nightmare. But fear not, weary marketer! There's a hero waiting in the wings: **ComplyAI, your comprehensive brand management solut**ion.
ComplyAI goes beyond just online proofing. It's a powerful suite of tools designed to bring order to the content chaos, making your life easier and your brand stronger. Let's dive into the key features:
## ComplyAI Label Management:
Tired of mislabeled products or regulatory compliance headaches? ComplyAI streamlines label creation and approval workflows, ensuring all your labels are accurate, consistent, and meet legal requirements.
## Digital Asset Management (DAM):
Centralize and organize all your brand assets – logos, images, videos, marketing materials – in one secure, easily accessible location. Say goodbye to lost files and wasted search time!
## Online Proofing:
Streamline the review and approval process with online proofing tools. Collaborate with team members, clients, and stakeholders in real-time, ensuring everyone is on the same page and revisions are clear and concise.
## Brand Asset Management:
Maintain brand consistency across all channels with ComplyAI's brand asset management tools. Define brand guidelines, ensure proper logo usage, and eliminate the risk of inadvertent brand dilution.
Here's how ComplyAI can benefit you:
## Increased Efficiency:
Spend less time searching for assets and managing revisions.
**Enhanced Brand Consistency:** Ensure your brand message is delivered flawlessly across all touchpoints.
Improved Collaboration: Streamline communication and approvals with team members and clients.
**Reduced Risk:** Mitigate compliance risks and maintain brand integrity.
Ready to conquer the content chaos and unleash the power of your brand? ComplyAI is the all-in-one solution you've been waiting for.
Sign up for a free trial today! | blogsx |
1,901,138 | Exciting News: My Upcoming Book "The Digital Marketer’s Playbook" is about to launch | I am thrilled to share some exciting news about my forthcoming book "The Digital Marketer’s... | 0 | 2024-06-27T22:36:42 | https://diegocarrasco.com/digital-marketers-playbook-launch/ | apress, books, digitalmarketersplay, projects | ---
title: Exciting News: My Upcoming Book "The Digital Marketer’s Playbook" is about to launch
published: true
date: 2024-06-26 07:00:00 UTC
tags: apress,books,digitalmarketersplay,projects
canonical_url: https://diegocarrasco.com/digital-marketers-playbook-launch/
---
I am thrilled to share some exciting news about my forthcoming book **"The Digital Marketer’s Playbook: How to Effectively Collaborate with Agencies, Freelancers, and Digital Marketing Experts,"** to be published by Apress (Springer-Nature). The book is targeted for release by the end of Q3 or Q4 2024. That's this year!
If you've followed my blog, you might recall that I [initially conceived](https://diegocarrasco.com/digital-marketing-playbook/) this project as a short book. My idea was to write a practical guide with the main topics related to digital marketing. It has now evolved into a comprehensive resource. Designed for professionals grounded in marketing or business and for those particularly interested in the field, it guides readers through the complexities of digital marketing, emphasizing effective collaboration with various partners. I think the title of the book is also self-explanatory. 😁
### The Journey and Collaboration
The book has evolved significantly over the past few months. My [first post](https://diegocarrasco.com/digital-marketing-playbook/) about it marked the beginning of this journey. Since then, ten months later, I've moved away from the idea of self-publishing for this project, choosing instead to sign to go with traditional publishing. This decision came after discussing the book proposal with Shivangi Ramachandran, an Apress Senior Editor (Acquisitions), which ended with me signin with Apress (Springer-Nature).
Partnering with them and working closely with Shiva and Sowmya Thodur (Production Editor), brought about substantial changes. After signing, I received a lot of guidelines regarding the structure how the book, which made me realize that the chapters were more that just a compilation of important points and I had to elaborate on them. These changes quickly expanded the book into a comprehensive 250+ page resource. That structured approach to writing required me to rethink and rewrite many sections of the book.
Throughout this journey, I have dedicated countless hours refining the content, often late into the night. My amazing wife’s patience has been invaluable, and I cannot thank her enough for her support. Throughout the entire process, she also served as a thoughtful partner, sharing her insights and candid comments.
Additionally, the [Unperfekthaus](https://www.uph.de/) in Essen provided a perfect environment with their focus room and endless coffee, where I spent nearly three days a week until closing time last month to finish the manuscript.
I also have to thank my colleagues at [MEHRKANAL](https://www.mehrkanal.com/), especially Miri and Mario, for enduring my questions and serving as sparring partners on several book topics. They often heard me talk about the book, perhaps more than they would have liked. Victor and Eva, who gave me detailed feedback on the first version of the Table of Content. Damian, Tom, Holger, Christian also listened to my thoughts on the book and gave their feedback. There are many others whose names escape my memory, as it's again late into the night.
Although many of them saw this as just another item on my never ending list of personal projects, I'm thrilled it has become a reality. 😎
I wrapped up the manuscript in early June, fueled by an impressive coffee intake—seriously, about 4-6 cups per session! Thanks to the patience of many, it's now in the capable hands of the Apress team for review. Can't wait to share it with you soon!
### A quick preface before diving into the details
This project has not only deepened my grasp of familiar topics; it has also allowed me to enrich the manuscript with innovative content driven by the latest trends and technologies in digital marketing.
Some chapters turned out shorter than anticipated, while others demanded more detail. I focused on keeping the content both core and practical, but ultimately, you'll be the judge of that.
Stay tuned for more updates and sneak peeks of the book! I am excited to share this resource with those of you eager to master digital marketing.
If you want to be among the first to explore "The Digital Marketer’s Playbook," please fill out the form below.
<button onclick="ml('show', 'bmmIEV', true)">Click here to show form</button>
### What will you learn by reading the book?
This book is my effort to provide you an all-inclusive resource to enhance your understanding of **digital marketing** and equip you with the skills and knowledge to work effectively with various partners in the field.
My goal throughout its pages is to provide you with everything you need to communicate your requirements to your partners, understand what they do and ask the right questions when you need to. I define digital marketing as a process, and that's also how the book is structured.
Within its pages, I guide you through the foundational concepts of digital marketing. You'll grasp what digital marketing is, familiarize yourself with crucial terms like digital assets, advertising channels, and customer awareness, and learn to distinguish between walled gardens and the open internet. This knowledge will be essential for discussing your goals and your campaigns implementations with your partners. I also describe the landscape of taxes and laws regarding digital marketing and how it can impact your digital marketing efforts.
As you dive deeper, I'll show you how to set up and structure digital marketing campaigns effectively. You'll understand bid strategies, ad quality, and the importance of placements and inventory. We'll explore various campaign types and their significance, focusing on how to craft a briefing to get impactful creatives, messages, and copy to achieve marketing success and align your digital marketing initiatives with your business goals.
Finally, I offer practical examples tailored to various company types, detailing key factors to consider based on company size, resources, and business structure. I also share my perspective on using artificial intelligence in digital marketing, discussing both its benefits and risks. Additionally, I provide an overview of social media and its role in digital marketing.
Ready to dive deeper into digital marketing? Sign up below to receive updates on "The Digital Marketer’s Playbook" and access exclusive digital marketing resources. | dacog |
1,900,994 | Atomic Agents Framework: Building a Simple AI Agent | Atomic Agents Framework: Imagine building AI applications as easily as snapping together LEGO blocks.... | 0 | 2024-06-26T06:59:21 | https://dev.to/hyscaler/atomic-agents-framework-building-a-simple-ai-agent-4847 | atomicagent, framework, aisystem, webdev | Atomic Agents Framework: Imagine building AI applications as easily as snapping together LEGO blocks. This is the revolutionary concept behind Atomic Agents, a new multi-agent framework inspired by Atomic Design principles. By breaking down AI systems into smaller, self-contained, reusable components, Atomic Agents promises a future where AI development is both modular and predictable.
## Understanding Atomic Design
Before diving into Atomic Agents, let’s explore the foundation it’s built upon: Atomic Design. Created by Brad Frost, this methodology revolutionizes UI design by deconstructing interfaces into fundamental, reusable parts—like atoms, molecules, and organisms in chemistry. This approach ensures scalable, consistent user interfaces and simplifies the modification of individual components with minimal impact. Think of it as assembling intricate structures with simple LEGO pieces.
## Chaining Agents and Tools
The true potential of the Atomic Agents Framework is unlocked when chaining the inputs and outputs of various tools and agents. By assigning an agent’s output schema as the input schema for a tool or another agent, developers can create complex yet comprehensible AI applications. Changing a tool or schema at any point won’t disrupt the system, ensuring flexibility and robustness.
## Building a Simple AI Agent
To illustrate, let’s build a simple AI agent using Atomic Agents.
**Install the Atomic Agents Package:**
bash
Copy code
pip install atomic-agents openai
Alternatively, clone the repository and contribute to its improvement.
**Import Necessary Components:**
Python
Copy code
import os
from atomic_agents.lib.components.system_prompt_generator import SystemPromptGenerator, SystemPromptInfo
**Define System Prompt Information:**
Python
Copy code
system_prompt = SystemPromptInfo(
background=['This assistant is a general-purpose AI designed to be helpful and friendly.'],
steps=[
'Understand the user\'s input and provide a relevant response.',
'Respond to the user.'
],
output_instructions=[
'Provide helpful and relevant information to assist the user.',
'Be friendly and respectful in all interactions.',
'Always answer in rhyming verse.'
]
)
system_prompt_generator = SystemPromptGenerator(system_prompt)
**Initialize Chat Memory:**
Python
Copy code
from atomic_agents.lib.components.chat_memory import ChatMemory
memory = ChatMemory()
initial_memory = [{'role': 'assistant', 'content': 'How do you do? What can I do for you? Tell me, pray, what is your need today?'}]
memory.load(initial_memory)
**Create Custom Chatbot:**
Python
Copy code
from atomic_agents.agents.base_chat_agent import BaseChatAgent, BaseChatAgentConfig
import openai
import instructor
API_KEY = os.getenv('OPENAI_API_KEY', '')
client = instructor.from_openai(openai.OpenAI(api_key=API_KEY))
agent = BaseChatAgent(
config=BaseChatAgentConfig(
client=client,
system_prompt_generator=system_prompt_generator,
model='gpt-3.5-turbo',
memory=memory,
)
)
print(f'Agent: {initial_memory[0]["content"]}')
while True:
user_input = input('You: ')
if user_input.lower() in ['/exit', '/quit']:
print('Exiting chat...')
break
response = agent.run(agent.input_schema(chat_message=user_input))
print(f'Agent: {response.chat_message}')
**Behind the Scenes**
Underneath, each tool and agent has an input schema and an output schema, extending from the BaseAgentIO class. These schemas facilitate structured responses and documentation generation, enhancing clarity and precision in both agent performance and documentation.
| amulyakumar |
1,900,989 | Removing redundant libraries from Makefiles | It can be awfully frustrating when your binary is massive, you can’t strip your executable otherwise... | 0 | 2024-06-26T06:56:26 | https://dev.to/albertjokelin/removing-redundant-libraries-from-makefiles-55nl | programming, tutorial, productivity, learning | It can be awfully frustrating when your binary is massive, you can’t `strip` your executable otherwise you may lose vital debugging information and the only way to figure out what libraries are and aren’t needed is by brute-forcing your way through.
There is an alternative way i discovered while working on my C++ program.
Theory: Assume we have two sets S1 and S2 defined as follows,
```
S1: Set of all libraries included in the makefile.
S2: Set of all libraries used by the compiler to build the binary.
```
It is obvious that S1 is the complete domain (i.e. S1 = U) and n(S1) >= n(S2). Now we define a third set, S3 as follows,
```
S3: Set of all libraries to be removed from the makefile.
```
The way we obtain S3 is by using the following equation:
```
S3 = S1 – S2
= (S1 ∩ S2)’ [The complement of the intersection of S1 and S2]
```
Add this line to the end of your COMPILER variable in the makefile `-Xlinker -Map=output.map`. This flag creates a map of all the functions called while linking the binaries.
Now, to make your life easier you can either use the `sed` command to parse through `output.map` or you can search for individual libraries and remove the ones not called from your Makefile. | albertjokelin |
1,900,993 | J3 PON 40/10 db Optical Power Meter Passive Optical Network | PON optical Power Meter is small size, handheld, low loss, has two output ports for OLT/Video and... | 0 | 2024-06-26T06:58:40 | https://dev.to/dira/j3-pon-4010-db-optical-power-meter-passive-optical-network-1n4g | webdev, javascript, beginners | PON optical Power Meter is small size, handheld, low loss, has two output ports for OLT/Video and ONU, huge data storage, USB connection.
The PON optical Power Meter is a handheld testing equipment with a good quality, low loss, and small size. The optical power meter is designed for FTTx PON network installation, maintenance, and testing, and may be used for GPON, EPON, APON, and BPON networks. The OLT/Video and ONU output ports on the fiber power meter support CW/burst downstream signal detection at 1490/1550nm and upstream detection at 1310nm. By threshold testing, the fiber optic power meter can directly display the status of pass, caution, or failure. It is an excellent optic tool for setting up and maintaining PONs.
(https://ip-fiber.com/collections/optic-fiber-test-equipment/products/j3-pon-optical-power-meter
) | dira |
1,900,992 | Best Villa in Noida extension | Experience luxurious living at the stunning villa located in the heart of Noida Extension. Boasting... | 0 | 2024-06-26T06:58:39 | https://dev.to/villainnoida87/best-villa-in-noida-extension-3hm | villas | Experience luxurious living at the **[stunning villa located in the heart of Noida Extension](https://villainnoida.com/luxurious-villa-for-sale-in-noida-extension/)**. Boasting exquisite architecture, modern amenities, spacious interiors, and lush green surroundings, this villa offers a perfect blend of elegance and comfort for a truly opulent lifestyle.
"Contact Us = +91-9582027717
Email id = sales@villainnoida.com
Address = Sector - 16 B, Noida Extension" | villainnoida87 |
1,900,991 | Exploring Python Task Queue Libraries with Load Test | by Steven Yue | Steven Yue took popular Python Task Queue Libraries and did the load testing. On the benchmarking... | 0 | 2024-06-26T06:57:47 | https://dev.to/tankala/exploring-python-task-queue-libraries-with-load-test-by-steven-yue-5g6e | programming, python, beginners, opensource | Steven Yue took popular Python Task Queue Libraries and did the load testing. On the benchmarking side how they performed and on the usability side how he feels covered in this article.
{% embed https://stevenyue.com/blogs/exploring-python-task-queue-libraries-with-load-test %} | tankala |
1,900,990 | Scop in Javascript. | JavaScript, renowned for its versatility, stands as a pivotal language in the realm of web... | 0 | 2024-06-26T06:57:26 | https://dev.to/sagor_cnits_73eb557b53820/scop-in-javascript-11ci | javascript, beginners, programming |
JavaScript, renowned for its versatility, stands as a pivotal language in the realm of web development. Core to its essence lies the concept of scope, delineating the reach of variables, functions, and objects within a codebase. In this discourse, we delve into the nuanced dimensions of scope in JavaScript, encapsulating global scope, local scope, and function scope, complemented by illustrative examples to illuminate their workings.
**Global Scope**
Global scope encompasses variables, functions, and objects accessible from any part of a program, having their origins outside any encapsulating function or code block. Take, for instance, the following snippet
```
let globalVariable = "Hello, World!";
function myFunction() {
console.log(globalVariable); // Output: "Hello, World!"
}
console.log(globalVariable); // Output: "Hello, World!"
```
Here, **globalVariable** is globally defined, thus accessible both within **myFunction** and beyond, exemplifying the unrestricted nature of global scope.
**Local Scope**
Contrarily, local scope confines variables, functions, and objects to specific code blocks, like an if statement or a for loop. Witness this **in action:**
```
if (true) {
let localVariable = "Hello, World!";
console.log(localVariable); // Output: "Hello, World!"
}
console.log(localVariable); // Throws an error: localVariable is not defined
```
In this scenario, **localVariable** finds existence solely within the confines of the if statement, inaccessible beyond its territorial borders.
**Function Scope**
Function scope relegates variables, functions, and objects to the confines of a particular function, rendering them inaccessible outside its precincts. Behold:
```
function myFunction() {
let functionVariable = "Hello, World!";
console.log(functionVariable); // Output: "Hello, World!"
}
console.log(functionVariable); // Throws an error: functionVariable is not defined
```
Here, **functionVariable** finds sanctuary solely within **myFunction**, beyond the grasp of external scopes, delineating the essence of function scope.
In summation, mastery of scope in JavaScript stands as a cornerstone for crafting elegant, effective, and maintainable codebases. Global scope affords ubiquitous access, local scope offers compartmentalization within code blocks, and function scope provides encapsulation within functions, collectively weaving the intricate fabric of JavaScript's scoping paradigm.
contact with me : www.linkedin.com/in/sagor-hossain-web-dev
| sagor_cnits_73eb557b53820 |
1,901,134 | Kubernetes: containers, and the “lost” SIGTERM signals | We have an API service with Gunicorn in Kubernetes that periodically returns 502, 503, 504... | 0 | 2024-07-07T11:20:49 | https://rtfm.co.ua/en/kubernetes-containers-and-the-lost-sigterm-signals/ | linux, kubernetes, devops, todayilearned | ---
title: Kubernetes: containers, and the “lost” SIGTERM signals
published: true
date: 2024-06-26 06:54:26 UTC
tags: linux,kubernetes,devops,todayilearned
canonical_url: https://rtfm.co.ua/en/kubernetes-containers-and-the-lost-sigterm-signals/
---
We have an API service with Gunicorn in Kubernetes that periodically returns 502, 503, 504 errors.
I started debugging it, and found a weird thing: there were no messages in the logs about the received `SIGTERM`, so I first went to deal with Kubernetes - why doesn't it send it?
### The Issue
So, here’s what it looks like.
We have a Kubernetes Pod:
```
$ kk get pod
NAME READY STATUS RESTARTS AGE
fastapi-app-89d8c77bc-8qwl7 1/1 Running 0 38m
```
Read its logs:
```
$ ktail fastapi-app-59554cddc5-lgj42
==> Attached to container [fastapi-app-59554cddc5-lgj42:fastapi-app]
```
Kill it:
```
$ kk delete pod -l app=fastapi-app
pod "fastapi-app-6cb6b46c4b-pffs2" deleted
```
And what do we see in his logs? Nothing!
```
...
fastapi-app-6cb6b46c4b-9wqpf:fastapi-app [2024-06-22 11:13:27 +0000] [9] [INFO] Application startup complete.
==> Container left (terminated) [fastapi-app-6cb6b46c4b-pffs2:fastapi-app]
==> New container [fastapi-app-6cb6b46c4b-9qtvb:fastapi-app]
==> New container [fastapi-app-6cb6b46c4b-9qtvb:fastapi-app]
fastapi-app-6cb6b46c4b-9qtvb:fastapi-app [2024-06-22 11:14:15 +0000] [8] [INFO] Starting gunicorn 22.0.0
...
fastapi-app-6cb6b46c4b-9qtvb:fastapi-app [2024-06-22 11:14:16 +0000] [9] [INFO] Application startup complete.
```
Here:
1. the service has started — “**Application startup complete**”
2. the pod die — “**Container left**”
3. a new Pod is started — “**New container**” and “**Starting gunicorn**”
And here is how it should look like in a normal case:
```
...
fastapi-app-59554cddc5-v7xq9:fastapi-app [2024-06-22 11:09:54 +0000] [8] [INFO] Waiting for application shutdown.
fastapi-app-59554cddc5-v7xq9:fastapi-app [2024-06-22 11:09:54 +0000] [8] [INFO] Application shutdown complete.
fastapi-app-59554cddc5-v7xq9:fastapi-app [2024-06-22 11:09:54 +0000] [8] [INFO] Finished server process [8]
fastapi-app-59554cddc5-v7xq9:fastapi-app [2024-06-22 11:09:54 +0000] [1] [ERROR] Worker (pid:8) was sent SIGTERM!
fastapi-app-59554cddc5-v7xq9:fastapi-app [2024-06-22 11:09:54 +0000] [1] [INFO] Shutting down: Master
==> Container left (terminated) [fastapi-app-59554cddc5-v7xq9:fastapi-app]
```
That is, here Gunicorn receives a `SIGTERM`, and correctly finishes its work.
What the hell?
Let’s look into it.
### Kubernetes and the Pod termination process
How does the process of stopping a Pod works?
I wrote more about it in [Kubernetes: NGINX/PHP-FPM graceful shutdown — getting rid of 502 errors](https://rtfm.co.ua/en/kubernetes-nginx-php-fpm-graceful-shutdown-and-502-errors/#Pod_Lifecycle_%E2%80%93_Termination_of_Pods), here is a very short summary:
1. we run `kubectl delete pod`
2. the `kubelet` on the corresponding WorkerNode receives a command from the API server to stop the Pod
3. the `kubelet` sends the `SIGTERM` signal to the process with PID 1 in the container of the Pod, that is, the first process that was started when the container was created
4. if the container did not stop within the [`terminationGracePeriodSeconds`](https://kubernetes.io/docs/concepts/containers/container-lifecycle-hooks/#hook-handler-execution) - then the `SIGKILL` is sent
That is, our Gunicorn process should receive the `SIGTERM`, write it to the log, and start stopping its worker.
Instead, it receives nothing and just dies.
Why?
### PID 1 and SIGTERM in containers
Let’s check what do we have in processes of the container of this Pod:
```
root@fastapi-app-6cb6b46c4b-9qtvb:/app# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 2576 948 ? Ss 11:14 0:00 /bin/sh -c gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
root 8 0.0 1.3 31360 27192 ? S 11:14 0:00 /usr/local/bin/python /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
root 9 0.2 2.4 287668 49208 ? Sl 11:14 0:04 /usr/local/bin/python /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
```
And we see that here is PID 1 is the `/bin/sh` process, which runs Gunicorn through `-c`.
Now let’s run `strace` in the Pod to see what signals it receives:
```
root@fastapi-app-6cb6b46c4b-9pd7r:/app# strace -p 1
strace: Process 1 attached
wait4(-1,
```
Run `kubectl delete pod` - but add time to measure the time it takes to execute the command:
```
$ time kk delete pod fastapi-app-6cb6b46c4b-9pd7r
pod "fastapi-app-6cb6b46c4b-9pd7r" deleted
real 0m32.222s
```
32 seconds…
What’s in the `strace`?
```
root@fastapi-app-6cb6b46c4b-9pd7r:/app# strace -p 1
strace: Process 1 attached
wait4(-1, 0x7ffe7a390a3c, 0, NULL) = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
--- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=0, si_uid=0} ---
wait4(-1, <unfinished ...>) = ?
command terminated with exit code 137
```
So, what was going on here?
1. The `kubelet` sent a `SIGTERM` signal to the process with PID 1 - _SIGTERM {si_signo=SIGTERM}_ - and the PID 1 would have to pass this signal to its children, stop them, and then terminate itself
2. but the process did not stopped — and `kubelet` waited the default 30 seconds to complete the process' work correctly - see [Pod phase](https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#pod-phase)
3. then `kubelet` killed the container, and the process ended with "**terminated with exit code 137**"
Usually, the 137 exit code is about OutOfMemory Killer, when a process is killed with SIGKILL, but in our case there was no OOMKill - just a `SIGKILL` sent because the processes in the Pod did not terminated on time.
Well, where did our `SIGTERM` go then?
Let’s run the signals directly from the container — first `kill -s 15`, the `SIGTERM`, then `kill -s 9`, the `SIGKILL`:
```
root@fastapi-app-6cb6b46c4b-r9fnq:/app# kill -s 15 1
root@fastapi-app-6cb6b46c4b-r9fnq:/app# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 2576 920 ? Ss 12:02 0:00 /bin/sh -c gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
root 7 0.0 1.4 31852 27644 ? S 12:02 0:00 /usr/local/bin/python /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
...
root@fastapi-app-6cb6b46c4b-r9fnq:/app# kill -s 9 1
root@fastapi-app-6cb6b46c4b-r9fnq:/app# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 2576 920 ? Ss 12:02 0:00 /bin/sh -c gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
root 7 0.0 1.4 31852 27644 ? S 12:02 0:00 /usr/local/bin/python /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
```
What? How? Why?
Why is `SIGTERM` ignored? And even more so `SIGKILL`, which should be a "non-ignored signal" - see [man signal](https://man7.org/linux/man-pages/man7/signal.7.html):
> _The signals SIGKILL and SIGSTOP cannot be caught, blocked, or ignored._
### Linux `kill()`, and The PID 1
Because the PID 1 in Linux is a special process, because it is the first process to be launched by the system, and it must be protected from an “accidental kill”.
If we look at [man kill](https://man7.org/linux/man-pages/man2/kill.2.html#NOTES), it is explicitly stated there, and it also talks about signal handlers to the process:
> _The only signals that can be sent to process ID 1, the init process, are those for which init_ **_has explicitly installed signal handlers_** _. This is done to ensure the system is not brought down accidentally_
You can check what handlers our process has — that is, what signals our process can intercept and process — from the file `/proc/1/status`:
```
root@fastapi-app-6cb6b46c4b-r9fnq:/app# cat /proc/1/status | grep SigCgt
SigCgt: 0000000000010002
```
The `SigCgt` signals are the signals that the process can intercept and process itself. The rest will be either ignored or processed with the `SIG_DFL` handler, and the `SIG_DFL` handler ignores signals for PID 1, which does not have its own handler.
Let’s ask ChatGPT what exactly these signals are:
_(you can actually translate it yourself if you are interested — see, for example_ [_How can I check what signals a process is listening to?_](https://unix.stackexchange.com/questions/85364/how-can-i-check-what-signals-a-process-is-listening-to)_, or_ [_How to read bitmask for the signals_](https://access.redhat.com/solutions/3478631)_)_
So here’s what do we have:
- a process `/bin/sh` with PID 1
- the PID 1 is a special process
- checking PID 1 shows us that it “recognizes” the only `SIGHUP` and `SIGCHLD` signals
- and both `SIGTERM` and `SIGKILL` will be ignored by it
But then how does the container stop?
### Docker stop and Linux signals
The process of stopping a container in Docker (or Containerd) is no different than in Kubernetes, because in fact `kubelet` just passes commands to the container runtime. In AWS Kubernetes, this is now `containerd`.
But for the sake of simplicity, let’s do it locally with Docker.
So, we start the container from the same Docker image that we tested in Kubernetes:
```
$ docker run --name test-app 492***148.dkr.ecr.us-east-1.amazonaws.com/fastapi-app-test:entry-2
[2024-06-22 14:15:03 +0000] [7] [INFO] Starting gunicorn 22.0.0
[2024-06-22 14:15:03 +0000] [7] [INFO] Listening at: http://0.0.0.0:80 (7)
[2024-06-22 14:15:03 +0000] [7] [INFO] Using worker: uvicorn.workers.UvicornWorker
[2024-06-22 14:15:03 +0000] [8] [INFO] Booting worker with pid: 8
[2024-06-22 14:15:03 +0000] [8] [INFO] Started server process [8]
[2024-06-22 14:15:03 +0000] [8] [INFO] Waiting for application startup.
[2024-06-22 14:15:03 +0000] [8] [INFO] Application startup complete.
```
Try to stop it by sending `SIGKILL` to the PID 1 - nothing has changed, it ignores the signal:
```
$ docker exec -ti test-app sh -c "kill -9 1"
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
99bae6d55be2 492***148.dkr.ecr.us-east-1.amazonaws.com/fastapi-app-test:entry-2 "/bin/sh -c 'gunicor…" About a minute ago Up About a minute test-app
```
Try to stop it with `docker stop` and look at the time again:
```
$ time docker stop test-app
test-app
real 0m10.234s
```
And the status of the container:
```
$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
cab29916f6ba 492***148.dkr.ecr.us-east-1.amazonaws.com/fastapi-app-test:entry-2 "/bin/sh -c 'gunicor…" About a minute ago Exited (137) 52 seconds ago
```
The same code 137, that is, the container stopped with `SIGKILL`, and the time taken to stop the container was 10 seconds.
But what if the signal is sent to PID 1, which ignores it?
I didn’t find it in the documentation for the `docker kill`, but we can kill container processes in two ways:
1. kill all child processes in the container itself — and then the parent (PID 1) will die itself
2. kill the entire group of processes on the host through their SID (Session ID) — which again will lead to PID 1 ignoring the signal, but dying itself, because all its children have died
Let’s take another look at the processes in the container:
```
root@cddcaa561e1d:/app# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 2576 1408 ? Ss 15:58 0:00 /bin/sh -c gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
root 7 0.1 0.0 31356 26388 ? S 15:58 0:00 /usr/local/bin/python /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
root 8 0.5 0.1 59628 47452 ? S 15:58 0:00 /usr/local/bin/python /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
root@cddcaa561e1d:/app# pstree -a
sh -c gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
└─gunicorn /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
└─gunicorn /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
```
We can’t kill the PID 1 because it ignores us — but we can kill the PID 7!
Then it will kill PID 8 after itself, because it is its child process, and when the PID 1 finds out that there are no more of its children, it will die itself, and the container will stop:
```
root@cddcaa561e1d:/app# kill 7
```
And container logs:
```
...
[2024-06-22 16:02:54 +0000] [7] [INFO] Handling signal: term
[2024-06-22 16:02:54 +0000] [8] [INFO] Shutting down
[2024-06-22 16:02:54 +0000] [8] [INFO] Error while closing socket [Errno 9] Bad file descriptor
[2024-06-22 16:02:54 +0000] [8] [INFO] Waiting for application shutdown.
[2024-06-22 16:02:54 +0000] [8] [INFO] Application shutdown complete.
[2024-06-22 16:02:54 +0000] [8] [INFO] Finished server process [8]
[2024-06-22 16:02:54 +0000] [7] [ERROR] Worker (pid:8) was sent SIGTERM!
[2024-06-22 16:02:54 +0000] [7] [INFO] Shutting down: Master
```
But since Pods/containers die with the exit code 137, they were killed with `SIGKILL`, because when Docker or other container runtime cannot stop a process with PID 1 with `SIGKILL`, it sends `SIGKILL` to all processes in the container.
That is:
1. first, SIGTEM is sent to the PID 1
2. after 10 seconds SIGKILL is sent to the PID 1
3. if this did not help, then SIGKILL is sent to all processes in the container
For example, you can do this by passing the Session ID (SID) to the `kill` command.
Find the main process of the container:
```
$ docker inspect --format '{{ .State.Pid }}' test-app
629353
```
Run `ps j -A`:
```
$ ps j -A
PPID PID PGID SID TTY TPGID STAT UID TIME COMMAND
...
629333 629353 629353 629353 ? -1 Ss 0 0:00 /bin/sh -c gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
629353 629374 629353 629353 ? -1 S 0 0:00 /usr/local/bin/python /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
629374 629375 629353 629353 ? -1 S 0 0:00 /usr/local/bin/python /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
```
We see our SID — _629353_.
And kill the whole group:
```
$ sudo kill -9 -- -629353
```
Okay.
This all is very good and very interesting.
But is it possible to do without these crutches?
### The “Right way” to launch processes in a container
Finally, let’s take a look at our `Dockerfile`:
```
FROM python:3.9-slim
WORKDIR /app
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt
COPY . .
ENTRYPOINT gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
```
See the [Docker — Shell and exec form](https://docs.docker.com/reference/dockerfile/#shell-and-exec-form) documentation:
> _INSTRUCTION [“executable”,”param1",”param2"] (exec form)
> INSTRUCTION command param1 param2 (shell form)_
So, in our case, the _shell form_ was used — and as a result, we have the `/bin/sh` as the PID 1, which calls Gunicorn through `-c`.
If we rewrite it in the _exec form_:
```
FROM python:3.9-slim
WORKDIR /app
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt
COPY . .
ENTRYPOINT ["gunicorn", "-w", "1", "-k", "uvicorn.workers.UvicornWorker", "--bind", "0.0.0.0:80", "app:app"]
```
And will run a container from this image, we will have only Gunicorn processes:
```
root@e6087d52350d:/app# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.6 0.0 31852 27104 ? Ss 16:13 0:00 /usr/local/bin/python /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
root 7 2.4 0.1 59636 47556 ? S 16:13 0:00 /usr/local/bin/python /usr/local/bin/gunicorn -w 1 -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:80 app:app
```
Which already can handle `SIGTERM` signals:
```
root@e6087d52350d:/app# cat /proc/1/status | grep SigCgt
SigCgt: 0000000008314a07
```
And now, if we send the `SIGTERM` to the PID 1, the container will finish its work normally:
```
root@e6087d52350d:/app# kill 1
```
And logs:
```
...
[2024-06-22 16:17:20 +0000] [1] [INFO] Handling signal: term
[2024-06-22 16:17:20 +0000] [7] [INFO] Shutting down
[2024-06-22 16:17:20 +0000] [7] [INFO] Error while closing socket [Errno 9] Bad file descriptor
[2024-06-22 16:17:20 +0000] [7] [INFO] Waiting for application shutdown.
[2024-06-22 16:17:20 +0000] [7] [INFO] Application shutdown complete.
[2024-06-22 16:17:20 +0000] [7] [INFO] Finished server process [7]
[2024-06-22 16:17:20 +0000] [1] [ERROR] Worker (pid:7) was sent SIGTERM!
[2024-06-22 16:17:21 +0000] [1] [INFO] Shutting down: Master
```
And now Kubernetes Pods will stop normally — and quickly, because they won’t wait for a grace period.
### Useful links
- [Why Sometimes the PID 1 Process Cannot Be Killed in a Container](https://blog.devops.dev/why-sometimes-the-pid-1-process-cannot-be-killed-in-a-container-b1c2debb4ca1) — a great post on how the SIGKILL is handled for the PID 1 in the Linux kernel itself
- [How Signal Works inside the Kernel](https://f0rm2l1n.github.io/2022-09-07-How-Signal-Works-inside-the-Kernel/) — and a bit more about the kernel and signals
- [Why do you need an init process inside your Docker container (PID 1)](https://daveiscoding.hashnode.dev/why-do-you-need-an-init-process-inside-your-docker-container-pid-1)
- [Killing a process and all of its descendants](https://morningcoffee.io/killing-a-process-and-all-of-its-descendants.html)
_Originally published at_ [_RTFM: Linux, DevOps, and system administration_](https://rtfm.co.ua/en/kubernetes-containers-and-the-lost-sigterm-signals/)_._
* * * | setevoy |
1,900,983 | Indirect Band Gap Semiconductor | An indirect band gap semiconductor is a type of semiconductor in which the maximum energy point of... | 0 | 2024-06-26T06:54:03 | https://dev.to/electricalvolt/indirect-band-gap-semiconductor-1fea | semiconductor, electronics |
An indirect band gap semiconductor is a type of semiconductor in which the maximum energy point of the valence band and the minimum energy point of the conduction band occur at different momentum values (wave vectors). This means that the transition of an electron from the valence band to the conduction band (or vice versa) requires a change in momentum. The most well-known indirect band gap semiconductor is silicon, which is widely used in the electronics industry.
**Key Characteristics of Indirect Band Gap Semiconductors:**
Momentum Change Requirement: Since the conduction band minimum and valence band maximum are at different points in momentum space, an electron transition between these bands requires a change in momentum. This is typically facilitated by the involvement of a phonon (a quantum of lattice vibration) to conserve momentum.
**Optical Properties:** Indirect band gap semiconductors are less efficient at absorbing and emitting light compared to direct band gap semiconductors. This is because the electron transitions that involve phonons are less probable than direct transitions.
**Applications:** Due to their optical properties, indirect band gap semiconductors are not typically used for light-emitting devices such as LEDs and laser diodes. However, they are extensively used in electronic devices like transistors, diodes, and integrated circuits.
**Comparison with Direct Band Gap Semiconductors:**
Direct Band Gap: In direct band gap semiconductors, the maximum of the valence band and the minimum of the conduction band occur at the same momentum value. Electron transitions between these bands do not require a change in momentum, making them highly efficient for optical applications.
**Efficiency:** [Direct band gap semiconductors](https://electronicslesson.com/direct-and-indirect-band-gap-semiconductors/) are more efficient at emitting light and are thus preferred for optoelectronic devices. Examples include gallium arsenide (GaAs) and indium phosphide (InP).
**Examples of Indirect Band Gap Semiconductors:**
**Silicon (Si)**: The most common material used in semiconductor devices, particularly for electronic applications.
**Germanium (Ge)**: Used in some high-speed and high-performance applications.
**Silicon Carbide (SiC):** Known for its high thermal conductivity and robustness, used in high-power and high-temperature applications.
##
In the energy-momentum (E-k) diagram:
Indirect Band Gap: The conduction band minimum is at a different k-value (momentum) than the valence band maximum.
Direct Band Gap: The conduction band minimum and the valence band maximum occur at the same k-value.
| electricalvolt |
1,900,987 | Unmasking Negative SEO Attacks: How to Identify and Mitigate Online Reputation Damage | In today's digital age, search engine optimization (SEO) plays a crucial role in online reputation... | 0 | 2024-06-26T06:53:41 | https://dev.to/soulilutionitfirmusa/unmasking-negative-seo-attacks-how-to-identify-and-mitigate-online-reputation-damage-318i | In today's digital age, search engine optimization (SEO) plays a crucial role in online reputation management. A strong SEO strategy ensures your website appears prominently in search results, driving traffic and building brand awareness. However, there exists a malicious counterpart to SEO: Negative SEO. Negative SEO attacks aim to manipulate search engine algorithms and rankings, ultimately damaging a website's online reputation and visibility.
What is Negative SEO?
Negative SEO encompasses a variety of unethical tactics aimed at lowering a competitor's website ranking in search engine results pages (SERPs). These tactics often violate search engine guidelines and can result in penalties from search engines like Google. Here are some common negative SEO tactics:
Keyword Stuffing: Malicious actors may embed best online reputation management services for individuals or excessive keywords into a website's content, making it appear spammy to search engines.
Link Spam: Creating a large number of low-quality backlinks pointing to your website can trigger search engine algorithms to penalize your site.
Social Media Manipulation: Negative reviews and comments posted across social media platforms can be part of a coordinated attack to damage brand perception.
Content Scraping and Pirating: Stealing your original content and publishing it on other websites can dilute your online presence and impact search engine rankings.
Paid Negative Reviews: Paying individuals to post fake negative reviews on online platforms can damage your online reputation and deter potential customers.
Identifying Negative SEO Attacks
Early detection is crucial for mitigating the damage caused by negative SEO attacks. Here are some signs to watch out for:
Sudden Drop in Search Rankings: A significant and unexplained drop in your website's ranking for relevant keywords might indicate a negative SEO attack.
Unnatural Backlink Profile: A sudden influx of low-quality backlinks from irrelevant websites may be a red flag. Utilize backlink analysis tools to identify suspicious links.
Negative Online Reviews: A surge in negative reviews across various platforms, particularly if they appear generic or fabricated, could be part of a coordinated attack.
Unusual Website Traffic: A sudden increase in irrelevant or low-quality traffic to your website can be a tactic to overload your servers and harm user experience.
Mitigating Online Reputation Damage from Negative SEO
If you suspect you're the target of a negative SEO attack, here are some steps you can take:
Disavow Low-Quality Backlinks: Utilize search engine tools to disavow any suspicious backlinks pointing to your website. This informs the search engine to disregard these links when evaluating your website's ranking.
Monitor Online Reviews: Actively monitor online reputation management firms platforms and address negative reviews promptly and professionally. Respond with empathy, acknowledge concerns, and outline any actions taken to rectify issues.
Report Malicious Activity: Report any suspected negative SEO activity to the respective search engine platform. They have dedicated channels for reporting violations of their webmaster guidelines.
Strengthen Your On-Page SEO: Focus on creating high-quality, informative content that provides value to your target audience. Optimize your website for relevant keywords while maintaining a natural reading experience.
Build High-Quality Backlinks: Focus on acquiring high-quality backlinks from reputable websites in your industry. Earn these backlinks organically by creating valuable content that other websites want to reference.
Seek Professional Help
Negative SEO attacks can be complex and require specialized knowledge to address effectively. Consider seeking assistance from reputable SEO professionals experienced in identifying and mitigating negative SEO tactics. They can help you develop a comprehensive strategy to protect your online reputation and restore your website's ranking.
Negative SEO attacks pose a significant threat to a website's online reputation and search engine visibility. However, by remaining vigilant, understanding the tactics employed, and taking proactive steps to mitigate damage, businesses can protect their online presence and maintain a strong search engine ranking. Remember, a focus on high-quality content, ethical SEO practices, and building genuine brand value will ultimately strengthen your online reputation management monitoring and safeguard your website against malicious attacks. | soulilutionitfirmusa | |
1,900,985 | business | In the modern landscape, business operates as a multifaceted entity, encompassing a vast array of... | 0 | 2024-06-26T06:52:42 | https://dev.to/nelohor44/business-3abj | business, webdev, javascript, beginners | In the modern landscape, business operates as a multifaceted entity, encompassing a vast array of activities that drive economies, shape societies, and influence everyday life. At its core, business involves the exchange of goods or services for profit, but this simple definition belies the complexity and dynamism inherent in contemporary commerce. From small, family-owned enterprises to multinational corporations, businesses come in various forms, each with unique challenges and opportunities.
Entrepreneurship is the lifeblood of business, fueled by innovation and the relentless pursuit of opportunities. Entrepreneurs identify gaps in the market, develop solutions, and take calculated risks to bring their visions to life. This process of creating and scaling a business often requires significant financial investment, strategic planning, and resilience in the face of adversity. Success in entrepreneurship not only hinges on the viability of the [business ](https://businesssky.io/)idea but also on the ability to adapt to changing market conditions and consumer preferences.
Marketing plays a crucial role in business, bridging the gap between products and consumers. Effective marketing strategies involve understanding consumer behavior, segmenting the market, and positioning products to meet the needs and desires of target audiences. With the advent of digital technologies, marketing has evolved to include a range of online channels, from social media to search engines, allowing businesses to reach global audiences with unprecedented precision and efficiency. Data analytics further enhances marketing efforts, providing insights into consumer trends and enabling personalized experiences.
Operations management is another critical aspect, focusing on the efficient and effective production and delivery of goods and services. This involves optimizing processes, managing supply chains, and ensuring quality control. Technological advancements, such as automation and artificial intelligence, have revolutionized operations, increasing productivity and reducing costs. However, these advancements also bring challenges, including the need for continuous innovation and the potential for workforce displacement.
Financial management underpins the sustainability and growth of a business. It encompasses budgeting, forecasting, and managing resources to ensure profitability and long-term viability. Sound financial practices are essential for navigating economic fluctuations, securing funding, and making informed investment decisions. Businesses must balance short-term financial performance with long-term strategic goals, maintaining liquidity while investing in growth opportunities.
Human resources are the backbone of any [business](https://businesssky.io/), as the success of an organization largely depends on its people. Recruitment, training, and retention of talented employees are critical functions of HR management. Creating a positive organizational culture, fostering employee engagement, and ensuring diversity and inclusion are key components of a successful HR strategy. As the workforce becomes increasingly diverse and remote work becomes more prevalent, businesses must adapt to new ways of working and managing talent.
The global nature of business today presents both opportunities and challenges. International trade opens new markets and allows for the exchange of ideas and technologies. However, navigating different regulatory environments, cultural differences, and geopolitical risks requires careful planning and strategic thinking. Businesses must also be mindful of ethical considerations and corporate social responsibility, ensuring their operations do not harm people or the planet.
In conclusion, business is a dynamic and intricate field requiring creativity, strategic thinking, and operational excellence. Whether it's through innovation, marketing, financial acumen, or human resource management, the goal remains to create value for customers, stakeholders, and society at large. As the world continues to evolve, businesses must stay agile, embracing change and continuously seeking ways to improve and grow.
| nelohor44 |
1,900,982 | How to create a search input with Tailwind CSS and JavaScript | Today we're going to create a search input with Tailwind CSS and JavaScript. Just like the previous... | 0 | 2024-06-26T06:44:52 | https://dev.to/mike_andreuzza/how-to-create-a-search-input-with-tailwind-css-and-javascript-4iom | javascript, tailwindcss, tutorial | Today we're going to create a search input with Tailwind CSS and JavaScript. Just like the previous tutorial with Alpinejs, we'll use the same structure and we'll add some JavaScript to make it interactive.
[See it live and get the code](https://lexingtonthemes.com/tutorials/how-to-create-a-search-input-with-tailwind-css-and-javascript/)
| mike_andreuzza |
1,900,980 | Mbbs consultancy in Hyderabad | Navigating Your MBBS Journey with the Best Consultancy in Hyderabad Embarking on the journey to... | 0 | 2024-06-26T06:43:09 | https://dev.to/sales_aakrutisolutions_/mbbs-consultancy-in-hyderabad-521l |
**[Navigating Your MBBS Journey with the Best Consultancy in Hyderabad](https://vietmbbs.com/)**
Embarking on the journey to becoming a doctor is a monumental decision, one that requires meticulous planning, immense dedication, and the right guidance. For many aspiring medical students in Hyderabad, the process of securing a spot in a reputable MBBS program can be daunting. This is where MBBS consultancies step in, playing a pivotal role in shaping the careers of future doctors. Hyderabad, known for its educational institutions and healthcare facilities, is home to several consultancies that provide invaluable assistance in navigating the complexities of medical education.
Choosing the right [MBBS consultancy in Hyderabad](https://vietmbbs.com/) can make all the difference in your medical career path. These consultancies offer a range of services designed to simplify the admission process, provide clarity on various options, and ensure that students make informed decisions. From understanding the eligibility criteria to filling out application forms, preparing for entrance exams, and even securing financial aid, MBBS consultancies are there every step of the way. They bridge the gap between students and their dreams by providing personalized guidance tailored to individual needs.
One of the primary benefits of engaging with an MBBS consultancy is access to expert advice. These consultancies are staffed with professionals who have a deep understanding of the medical education landscape. They stay updated with the latest changes in admission procedures, entrance exams, and eligibility criteria. This expertise ensures that students receive accurate and timely information, which is crucial for making strategic decisions. Additionally, consultancies often have established relationships with medical colleges and universities, providing students with opportunities that might not be accessible otherwise.
In Hyderabad, several consultancies have built a reputation for excellence in guiding students through their MBBS admissions. These consultancies offer comprehensive services that go beyond just application assistance. They provide career counseling, helping students understand the various specializations in medicine and the career prospects associated with each. This holistic approach ensures that students not only gain admission to a good MBBS program but also have a clear vision of their future in the medical field.
The process of applying for MBBS can be overwhelming, with numerous forms to fill out, documents to submit, and deadlines to meet. An MBBS consultancy simplifies this process by providing structured timelines and checklists, ensuring that students do not miss any critical steps. They assist with document verification, application submissions, and follow-ups with institutions, alleviating much of the stress associated with the admissions process. This organized approach allows students to focus on their studies and entrance exam preparations without getting bogged down by administrative tasks.
Entrance exams are a significant hurdle in the path to securing an MBBS seat. [MBBS consultancies in Hyderabad](https://vietmbbs.com/) offer specialized coaching and preparation strategies for these exams. They provide study materials, conduct mock tests, and offer personalized coaching sessions to address individual weaknesses. This targeted preparation increases students’ chances of performing well in entrance exams, ultimately securing admission to their desired medical colleges.
Furthermore, MBBS consultancies also offer guidance on financial aid and scholarships. The cost of medical education can be substantial, and many students require financial assistance to pursue their dreams. Consultancies provide information on various scholarships, grants, and loan options available to students. They assist in the application process for these financial aids, ensuring that students can access the necessary funds to support their education.
**In conclusion**, choosing the right [MBBS consultancy in Hyderabad](https://vietmbbs.com/) can significantly impact your medical education journey. These consultancies offer expert advice, comprehensive services, and personalized guidance, making the complex process of securing an MBBS seat more manageable. With their support, aspiring doctors can focus on their studies and entrance exams, confident that they have a knowledgeable partner guiding them towards their dreams. If you are an aspiring medical student in Hyderabad, investing in a reputable MBBS consultancy could be the key to unlocking your future in medicine.
| sales_aakrutisolutions_ | |
1,900,979 | smooth stack lawsuit | Smoothstack, a tech talent and training company, recently found itself embroiled in a lawsuit that... | 0 | 2024-06-26T06:42:56 | https://dev.to/nelohor44/smooth-stack-lawsuit-3agd | lawsuit | Smoothstack, a tech talent and training company, recently found itself embroiled in a lawsuit that has garnered significant attention. The core of the lawsuit revolves around allegations from former employees who claim that Smoothstack's employment practices were not only unfair but potentially unlawful. These employees have accused the company of implementing restrictive contractual terms that allegedly impeded their ability to pursue other career opportunities after leaving Smoothstack.
The complaints include claims that [Smoothstack's ](https://smoothstacklawsuit.co.uk/)contracts contained non-compete clauses that were excessively broad and restrictive, preventing former employees from working in their chosen field for an extended period. Furthermore, there are allegations that the company imposed significant financial penalties on those who attempted to leave before their contract terms ended, effectively trapping them in their positions.
Another key aspect of the lawsuit involves the company's training programs. Smoothstack markets itself as a company that provides valuable training and job placement services for individuals looking to enter the tech industry. However, former employees argue that the training could have been better and provided the skills necessary to succeed in the tech sector. Moreover, some plaintiffs claim that they were misled about the nature of the job opportunities that would be available to them after completing the training program.
The lawsuit also highlights issues related to wage practices. Some former employees allege that they were paid significantly less than what was initially promised or expected and that the company failed to adequately compensate them for overtime work. These wage-related complaints have added another layer of complexity to the legal battle [Smoothstack ](https://smoothstacklawsuit.co.uk/)is now facing.
In response to the lawsuit, Smoothstack has denied any wrongdoing. The company asserts that its contracts are standard for the industry and necessary to protect its business interests. Smoothstack also defends its training programs, stating that they are designed to meet the needs of a rapidly evolving tech industry and that many graduates have gone on to successful careers.
The outcome of the lawsuit could have broader implications for the tech industry, particularly in how training and employment contracts are structured. If the plaintiffs succeed, it might prompt other companies to re-evaluate their contractual practices and potentially lead to more employee-friendly policies.
As the case progresses, it will be closely watched by industry experts, legal professionals, and employees alike, all interested in understanding how this lawsuit might reshape the landscape of tech employment and training.
| nelohor44 |
1,900,977 | There is no excuse to not start improving accessibility | In my three years of working on accessibility as a front-end developer I have heard quite a few... | 0 | 2024-06-26T06:31:37 | https://dev.to/pancompany/there-is-no-excuse-to-not-start-improving-accessibility-50hj | a11y | In my three years of working on accessibility as a front-end developer I have heard quite a few misconceptions about accessibility: “Improving accessibility is the developers' responsibility”, “It costs a lot of time and effort to improve accessibility” or “Accessibility is not a top priority because not a lot of disabled people use my website”. This post is about giving a small introduction about accessibility and some helpful steps that can be taken by anyone (yes, anyone and not just software developers) to improve the accessibility of your pages!
The goal of accessibility is to have a website that is usable by anyone. The first thought most people have is that disabled people need to be able to use a website, and blind people are often the first thought of example. But not just blind people have trouble navigating a website. Imagine breaking an arm and not being able to use a keyboard or mouse. What if you are color blind and cannot see a specific color? Or if someone has a cognitive disability, will they understand what is shown? It’s all about understanding what is happening on your website and making sure all visitors understand as well.
## So now it is time to get started with improving accessibility!
First it will be a good idea to read the guidelines that are globally in place. On the website of [w3](https://www.w3.org/TR/WCAG21/) you can find the Web Content Accessibility Guidelines (WCAG) and read up on information about accessibility.
Now, in improving there are three steps to take: identify, prioritize and fix accessibility issues. The identify step can be done by anyone who can spend time on it. The prioritize step should be done by the Product Owner or Manager of the team that will fix the issue. For the fix step you will need a front-end software developer and sometimes a UX-designer. The identify step is the step that takes the most time in the process.
To identify accessibility issues, the best way is to test your website with automated and manual testing methods. You can start with an automated tool to scan your webpage for common issues like missing labels, contrast or broken links. The w3 website has a dedicated page with a [list of tools](https://www.w3.org/WAI/test-evaluate/tools/list/) that are tested by many and found to be the best to use. I can personally recommend Wave or the aXe tools, which you can find in the list of tools on the w3 website, or Lighthouse, which is a built-in tool for Google Chrome.
The more difficult task is the manual testing, which is needed to check for more complex accessibility issues or issues that cannot be found by automated tools. These tests include keyboard accessibility, screen reader compatibility or readability. Keep in mind when testing with these assistive technologies that anything you hear or see on your screen must be logical and should make sense to users. It is all about getting into the heads of your users and seeing how they use the technologies to understand the website. If you have trouble identifying issues this way, the best tip I can give you is to ask users of your website and let them show you where they run into issues. There are also people you can ask with different disabilities to test your website and share their insights with you. I would recommend inviting or speaking to one of these users at least once. If you have trouble finding these users, there are multiple companies that specialize in accessibility and would be able to set up a meeting for you.
After identifying the issues, the next step is to prioritize them so they can be picked up by the corresponding team to fix them. In my experience the best way to approach this is to split up the identified problems into small pieces and schedule to pick up at least one piece every sprint (if you are working with Scrum) or every few other tasks. Most fixes require small changes like adding html labels to existing elements, adding or changing the tab index of elements, rewriting texts or changing some colors to improve contrast. In case a bigger UI change is needed where multiple elements need to be moved or replaced, treat it like any other big improvements.
As you can see, anyone can contribute to finding accessibility issues. What will take the most time is the manual testing: choose your assistive technology and start testing to identify how to make your website more understandable. There is no excuse not to start today with the road to your accessibility improvements! | lavendelana |
1,900,975 | Watercooler Wednesday | General discussion thread about... Whatever. What's new in your life? Hobbies, interests, games,... | 0 | 2024-06-26T06:30:07 | https://dev.to/ben/watercooler-wednesday-4mm9 | watercooler | General discussion thread about... Whatever. What's new in your life?
Hobbies, interests, games, kids, parents, travel, career, whatever.
Let's keep this chat light and positive and see if it can become a nice weekly check-in. | ben |
1,871,915 | Boletín AWS Open Source, June Edition | Bienvenidos a una nueva edición del boletín de AWS Open Source. Con el verano a la vuelta de la... | 0 | 2024-06-26T06:30:00 | https://dev.to/aws-espanol/boletin-aws-open-source-june-edition-3go3 | opensource, cybersecurity, developers, awsespanol | Bienvenidos a una nueva edición del boletín de AWS Open Source. Con el verano a la vuelta de la esquina, muchos podréis disfrutar de unas merecidas vacaciones, y es el momento perfecto para conocer nuevas herramientas y soluciones.
En esta edición, exploraremos herramientas de pentesting específicas para AWS. Aprenderemos a asegurar nuestra infraestructura utilizando Infraestructura como Código (IaC). Además, conoceremos la locura de Álvaro Hernández, nuestro AWS Hero, con Dyna53. Introduciremos dos nuevas herramientas desarrolladas en Rust: una para la gestión de buckets en S3 y otra que resume y extrae detalles importantes de nuestras reuniones diarias. Por último, las últimas novedades en IA generativa.
Esperamos que disfrutéis la recopilación!
## Tools
**[Sustainability Scanner](https://github.com/awslabs/sustainability-scanner)**
El Sustainability Scanner es una herramienta de código abierto diseñada para ayudar a los clientes a crear una infraestructura más sostenible en AWS mediante la evaluación de su infraestructura como código (IaC) frente a un conjunto de mejores prácticas de sostenibilidad y sugerencias de mejoras para aplicar a su código.
**[containers-cost-allocation-dashboard](containers-cost-allocation-dashboard)**
containers-cost-allocation-dashboard proporciona todo lo necesario para crear un panel QuickSight para la asignación de costos de contenedores basado en datos de Kubecost. El panel te ofrece los costos y el uso de EKS dentro del clúster en un entorno multi-clúster, utilizando datos de un pod Kubecost autohospedado. El README contiene enlaces adicionales a recursos que te ayudarán a comprender cómo funciona esto, las dependencias y cómo implementar y configurar este proyecto.
**[cloudfront-hosting-toolkit](https://aws-oss.beachgeek.co.uk/3xv)**
cloudfront-hosting-toolkit es una CLI diseñada para ayudarte a desplegar frontends de forma rápida y segura. Esta herramienta te simplifica la interacción con la plataforma AWS para desplegar sitios web estáticos. Te guía a través de la configuración de un nuevo repositorio, la ejecución del proceso de despliegue y proporciona el nombre de dominio al finalizar. Al seguir estos pasos, vinculas fácilmente tu repositorio de GitHub y despliegas la infraestructura necesaria, simplificando el proceso de despliegue. Puedes obtener más información leyendo la entrada del blog,[Introducing CloudFront Hosting Toolkit](https://aws-oss.beachgeek.co.uk/3xw), donde Achraf Souk, Corneliu Croitoru y Cristian Graziano te ayudan con una guía práctica sobre este proyecto.
**[terraform-aws-alternat](https://aws-oss.beachgeek.co.uk/3xx)**
terraform-aws-alternat simplifica cómo puedes desplegar instancias NAT en alta disponibilidad, lo que puede ayudarte a reducir tus costos si necesitas proporcionar acceso a Internet dentro de tu VPC. Vale la pena revisar el README que proporciona detalles y comparaciones sobre el uso de este enfoque frente a los NAT Gateways.
## Demos, Soluciones y Workshops
**[Dyna53](https://dyna53.io/)**
Dyna53 es una solución open-source creada por nuestro AWS Hero, Álvaro Hernández, que te permite implementar en tu cuenta de AWS una base de datos NoSQL de clave-valor que es escalable automáticamente. Expone la API de Dynamo, pero almacena datos en una zona de tu elección en Route53. Esta locura surgió de un comentario en redes sociales de Corey Quin, un influencer en el mundo cloud que rara vez deja pasar la oportunidad de examinar, analizar, explicar, burlarse y defender AWS, que de forma sarcástica dijo que Route 53 es la "Base de Datos Principal de Amazon". Pues bien, deseo concedido. Dyna53 es aquello con lo que Corey soñó alguna vez.
**[create-and-delete-ngw ](https://aws-oss.beachgeek.co.uk/3x2)**
Este proyecto contiene el código fuente y archivos de soporte para una aplicación serverless que asigna una dirección IP elástica, crea un Gateway NAT y agrega una ruta al Gateway NAT en una tabla de rutas VPC. La aplicación también elimina el Gateway NAT y libera la dirección IP elástica. El proceso para crear y eliminar un Gateway NAT está orquestado por una Máquina de Estados de AWS Step Functions, activada por un programador de EventBridge. La programación puede definirse mediante parámetros durante el proceso de implementación de SAM.
**[real-time-social-media-analytics-with-generative-ai](https://aws-oss.beachgeek.co.uk/3x5)**
Aquí os presentamos una solución para el análisis de redes sociales en tiempo real con IA generativa. Este repositorio te ayuda a construir e implementar una arquitectura AWS que puede combinar datos con GenAI utilizando el Servicio Administrado de Amazon para Apache Flink y Amazon Bedrock.
### Cloud Native
**[StackGres](https://stackgres.io/)**
Volvemos con nuestro Hero, Álvaro Hernández, que nos trae Stackgres, una distribución de PostgreSQL para Kubernetes. Se trata de un stack que trae todo lo necesario para tener una implementación completa. No se trata solo de Postgres, sino que además tendréis disponible el agrupamiento de conexiones, conmutación por error y alta disponibilidad automáticas, monitoreo, copias de seguridad y recuperación ante desastres, y el registro centralizado...todo en uno.
###IA Generativa
Mi compañero Dennis Traub nos trae un tutorial para aprender de manera práctica **[cómo utilizar la nueva API de Converse de Amazon Bedrock](https://community.aws/content/2dtauBCeDa703x7fDS9Q30MJoBA/amazon-bedrock-converse-api-developer-guide)** para interactuar con modelos de inteligencia artificial generativa en Amazon Bedrock, utilizando el AWS SDK para JavaScript.
**[serverless-genai-food-analyzer-app](https://aws-oss.beachgeek.co.uk/3x6)**
Muchas veces nos preguntáis por el código de las demos que mostramos en nuestros AWS Summits. Pues bien, aquí tenéis esta aplicación que analiza los alimentos usando IA generativa y serverless. Fue la ganadora del AWS Hackathon France 2024 y se presentó como demo en el AWS Summit Paris y de Madrid 2024 (Foodlens). Con Foodlens, simplemente escaneas un código de barras de un producto y obtienes explicaciones de los ingredientes e información nutricional que puedes personalizar con tus alergias o si estás siguiendo una dieta, introducir tus requerimientos. También puedes tomar una foto de los productos y recibir recetas personalizadas basadas en tus preferencias alimenticias. ¿Qué os parece?
**[amazon-bedrock-serverless-prompt-chaining](https://aws-oss.beachgeek.co.uk/3xz)**
Este repositorio proporciona ejemplos de cómo usar AWS Step Functions y Amazon Bedrock para construir aplicaciones de IA generativa complejas, serverless y altamente escalables, utilizando el encadenamiento de prompts. Con el encadenamiento de prompts, puedes construir un conjunto de subtareas más pequeñas (prompts individuales). Juntas, estas subtareas conforman tu tarea compleja que deseas que el LLM complete para tu aplicación. Para lograr la tarea general, tu aplicación alimenta cada prompt de subtask al LLM en un orden predefinido o según un conjunto de reglas definidas. Hay muchos ejemplos en el README, así que échale un vistazo para aprender más sobre el encadenamiento de prompts y cómo puedes hacerlo al estilo sin servidor.
## Security
Este mes os traemos a petición de los lectores, herramientas de pentesting en AWS para validar y verificar la seguridad de vuestros servicios.
**Disclaimer:** Como siempre, lo que os compartimos a continuación debe usarse de manera ética y con el consentimiento de vuestro cliente o empresa. No nos hacemos responsables del uso indebido que se pueda derivar de esta información.
A continuación os mostramos cinco herramientas populares para probar la seguridad en AWS.
[**Pacu**](https://github.com/RhinoSecurityLabs/pacu) es una herramienta de código abierto diseñado para pruebas de seguridad ofensiva. Permite a los testers simular escenarios de ataque en entornos de AWS para identificar debilidades de seguridad.
**Características:**
- **Diseño Modular:** Pacu tiene una arquitectura modular, permitiendo a los usuarios cargar módulos específicos para tareas como enumeración, escalada de privilegios y explotación.
- **Automatización:** Automatiza muchas de las tareas tediosas asociadas con las pruebas de penetración en AWS.
- **Gestión de Credenciales:** Maneja múltiples credenciales de AWS, facilitando el cambio entre diferentes cuentas.
- **Módulos Personalizados:** Los usuarios pueden desarrollar e integrar módulos personalizados para extender la funcionalidad de Pacu.
**Capacidades Clave:**
- **Enum IAM:** Enumera usuarios, roles, políticas y grupos de IAM.
- **Buckets S3:** Identifica buckets S3 mal configurados e intenta acceder a su contenido.
- **Escalada de Privilegios:** Identifica posibles rutas de escalada de privilegios dentro del entorno de AWS.
- **Backdoor Lambda:** Despliega un backdoor en funciones de AWS Lambda.
**Instalación:**
```bash
pip3 install -U pacu
```
**Uso:**
Para iniciar Pacu y crear una nueva sesión:
```bash
pacu
```
[**ScoutSuite**](https://github.com/nccgroup/ScoutSuite) es una herramienta de auditoría de seguridad multi-nube de código abierto que funciona con AWS, Azure y GCP. Proporciona una vista completa de la postura de seguridad de los entornos en la nube utilizando las APIs de los servicios en la nube.
**Características:**
- **Soporte Multi-Nube:** Compatible con AWS, Azure y GCP, haciéndola versátil para entornos multi-nube.
- **Informes Detallados:** Genera informes en HTML que proporcionan un análisis en profundidad de la configuración de seguridad.
- **Sin Agentes:** No requiere la instalación de agentes dentro del entorno de la nube.
**Capacidades Clave:**
- **Análisis de IAM:** Evalúa las configuraciones de IAM, identificando roles y políticas excesivamente permisivos.
- **Servicios de Almacenamiento:** Evalúa la seguridad de los buckets S3, asegurando que no sean accesibles públicamente.
- **Configuración de Red:** Revisa las reglas de grupos de seguridad y configuraciones de VPC para identificar posibles errores de configuración.
- **Registro y Monitoreo:** Verifica la configuración de CloudTrail y CloudWatch para asegurar el registro y monitoreo adecuados.
**Instalación:**
```bash
pip3 install scoutsuite
```
**Uso:**
Para ejecutar ScoutSuite y generar un informe:
```bash
aws --profile <profile-name> configure
scout aws --profile <profile-name> -f
```
Ejemplo para EC2:
[**PMapper**](https://github.com/nccgroup/PMapper) te ayuda a entender quién tiene permiso para hacer qué en AWS, usando gráficos y simulaciones. Es como un mapa que te muestra las relaciones y permisos entre usuarios y roles.
**Características:**
- **Análisis Basado en Gráficos:** Utiliza un enfoque basado en gráficos para mapear entidades de IAM y sus permisos.
- **Visualizaciones:** Proporciona representaciones visuales de las relaciones y permisos de IAM, facilitando la identificación de problemas de seguridad.
- **Simulación de Políticas:** Simula evaluaciones de políticas de IAM para entender el impacto de políticas específicas en los permisos.
- **Lenguaje de Consulta:** Permite a los usuarios consultar el gráfico de IAM para encontrar relaciones o configuraciones incorrectas.
**Capacidades Clave:**
- **Construcción de Gráficos de IAM:** Construye un gráfico de entidades de IAM y sus relaciones basado en las políticas de IAM de la cuenta de AWS.
- **Identificación de Riesgos:** Identifica permisos de alto riesgo y posibles rutas de escalada de privilegios.
- **Consultas Interactivas:** Los usuarios pueden consultar de manera interactiva el gráfico de IAM para explorar permisos y relaciones específicas.
- **Permisos Efectivos:** Determina los permisos efectivos de usuarios y roles simulando evaluaciones de políticas.
**Instalación:**
```bash
git clone https://github.com/nccgroup/PMapper.git
cd PMapper
pip install .
```
**Uso:**
Para crear un gráfico de permisos de IAM:
```bash
pmapper --profile <profile-name> graph create
```
Aquí tenéis un ejemplo de visualización:
[**Enumerate-IAM** ](https://github.com/andresriancho/enumerate-iam)detalla los usuarios, roles y políticas en AWS, ayudando a identificar permisos excesivos o configuraciones incorrectas. Es como una lista completa de quién puede hacer qué y con qué permisos.
**Características:**
- **Enumeración Detallada:** Proporciona información completa sobre las entidades de IAM y sus permisos.
- **Análisis de Políticas:** Analiza las políticas de IAM para identificar aquellas excesivamente permisivas o mal configuradas.
- **Salida en JSON:** Genera resultados en formato JSON, facilitando la integración con otras herramientas o procesos.
**Capacidades Clave:**
- **Enumeración de Usuarios y Roles:** Lista todos los usuarios y roles de IAM dentro de una cuenta de AWS.
- **Extracción de Políticas:** Extrae y analiza políticas inline y gestionadas.
- **Enumeración de Grupos:** Lista todos los grupos de IAM y sus usuarios y políticas asociados.
- **Permisos Efectivos:** Determina los permisos efectivos de los usuarios y roles de IAM.
**Instalación:**
```bash
git clone https://github.com/andresriancho/enumerate-iam.git
cd enumerate-iam
pip install -r requirements.txt
```
**Uso:**
Para ejecutar Enumerate-IAM y realizar una enumeración básica:
```bash
python enumerate-iam.py -h
python enumerate-iam.py --access-key <key-here> --secret-key <secret-here>
```
Ejemplo:
```
$ ./enumerate-iam.py --access-key AKIA... --secret-key StF0q...
2019-05-10 15:57:58,447 - 21345 - [INFO] Starting permission enumeration for access-key-id "AKIA..."
2019-05-10 15:58:01,532 - 21345 - [INFO] Run for the hills, get_account_authorization_details worked!
2019-05-10 15:58:01,537 - 21345 - [INFO] -- {
"RoleDetailList": [
{
"Tags": [],
"AssumeRolePolicyDocument": {
"Version": "2008-10-17",
"Statement": [
{
...
2019-05-10 15:58:26,709 - 21345 - [INFO] -- gamelift.list_builds() worked!
2019-05-10 15:58:26,850 - 21345 - [INFO] -- cloudformation.list_stack_sets() worked!
2019-05-10 15:58:26,982 - 21345 - [INFO] -- directconnect.describe_locations() worked!
2019-05-10 15:58:27,021 - 21345 - [INFO] -- gamelift.describe_matchmaking_rule_sets() worked!
2019-05-10 15:58:27,311 - 21345 - [INFO] -- sqs.list_queues() worked!
```
[**Prowler**](https://github.com/prowler-cloud/prowler)
Prowler es una herramienta de seguridad de código abierto diseñada para auditar y asegurar entornos de AWS. Se enfoca en verificar la conformidad con varios estándares y mejores prácticas de seguridad.
**Características:**
- **Auditorías de Seguridad:** Realiza auditorías exhaustivas para identificar configuraciones incorrectas y vulnerabilidades en las cuentas de AWS.
- **Cumplimiento Normativo:** Proporciona verificaciones para cumplir con estándares de seguridad como CIS AWS Foundations Benchmark, GDPR, HIPAA, ISO 27001, y SOC 2.
- **Reportes Detallados:** Genera informes detallados en formato HTML y JSON que resumen los hallazgos y recomendaciones.
- **Modularidad:** Prowler es altamente modular, permitiendo a los usuarios ejecutar controles específicos basados en sus necesidades y requisitos de cumplimiento.
- **Automatización:** Facilita la automatización de auditorías de seguridad, permitiendo integrarse fácilmente en flujos de trabajo de DevOps y CI/CD.
**Capacidades Clave:**
- **Verificación de Configuraciones:** Revisa configuraciones de IAM, S3, CloudTrail, VPC, y otros servicios de AWS para asegurar que cumplen con las mejores prácticas.
- **Detección de Vulnerabilidades:** Identifica configuraciones débiles que podrían ser explotadas por atacantes.
- **Integración con SIEM:** Los resultados de Prowler pueden integrarse con sistemas de gestión de eventos e información de seguridad (SIEM) para un análisis y respuesta más detallados.
- **Soporte Multi-Account:** Puede auditar múltiples cuentas de AWS desde una única ejecución, facilitando la gestión de entornos grandes.
**Instalación:**
```bash
git clone https://github.com/prowler-cloud/prowler
cd prowler
./prowler
```
**Uso:**
Para ejecutar una auditoría básica y generar un informe en HTML, usa el siguiente comando:
```bash
./prowler -M html
```
Comando:
```
prowler aws --service iam accessanalyzer \
--ignore-unused-services
_
_ __ _ __ _____ _| | ___ _ __
| '_ \| '__/ _ \ \ /\ / / |/ _ \ '__|
| |_) | | | (_) \ V V /| | __/ |
| .__/|_| \___/ \_/\_/ |_|\___|_|v3.13.0
|_| the handy cloud security tool
Date: 2024-02-13 11:45:13
This report is being generated using credentials below:
AWS-CLI Profile: [default] AWS Filter Region: [all]
AWS Account: [552455647653] UserId: [AROAYBIHMGGS6YI4ZXZD5:demo@prowler.com]
Caller Identity ARN: [arn:aws:sts::552455647653:assumed-role/AWSReservedSSO_ProwlerRole_2ad14f771534c04a/demo@prowler.com]
Executing 38 checks, please wait...
-> Scan completed! |▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉| 38/38 [100%] in 30.3s
Overview Results:
╭────────────────────┬────────────────────╮
│ 44.79% (43) Failed │ 55.21% (53) Passed │
╰────────────────────┴────────────────────╯
Account 552455647653 Scan Results (severity columns are for fails only):
╭────────────┬────────────────┬───────────┬────────────┬────────┬──────────┬───────╮
│ Provider │ Service │ Status │ Critical │ High │ Medium │ Low │
├────────────┼────────────────┼───────────┼────────────┼────────┼──────────┼───────┤
│ aws │ accessanalyzer │ FAIL (19) │ 0 │ 0 │ 0 │ 19 │
├────────────┼────────────────┼───────────┼────────────┼────────┼──────────┼───────┤
│ aws │ iam │ FAIL (24) │ 2 │ 15 │ 7 │ 0 │
╰────────────┴────────────────┴───────────┴────────────┴────────┴──────────┴───────╯
* You only see here those services that contains resources.
Detailed results are in:
- HTML: /Users/toni/output/prowler-output-552455647653-20240213114513.html
- JSON-OCSF: /Users/toni/output/prowler-output-552455647653-20240213114513.ocsf.json
- CSV: /Users/toni/output/prowler-output-552455647653-20240213114513.csv
- JSON: /Users/toni/output/prowler-output-552455647653-20240213114513.json
To see findings detail browse any of those files, for quick review, see the html one.
```
Si queréis ver cómo se puede detectar y evitar el 90% de los ataques en la nube os recomendamos el siguiente [blog](https://dev.to/aws-espanol/detectando-y-evitando-el-90-de-los-ataques-en-la-nube-con-herramientas-open-source-359j).
Todas estas herramientas son importantes para mantener la seguridad en AWS y asegurarse de que todo esté bien protegido. Combinadas con servicios existentes como Security Hub, GuardDuty, y otros, disponéis de un stack robusto para asegurar vuestros entornos.
## Vídeos del Mes
**Usando Amazon Q Developer para escribir código para Observabilidad**
Ricardo Ferreira nos muestra en este vídeo cómo puedes utilizar herramientas como Amazon Q Developer para ayudarte a integrar OpenTelemetry en tus aplicaciones. En este video, Ricardo muestra cómo utilizar Amazon Q Developer para instrumentar un microservicio escrito en Go para OpenTelemetry.
{% embed https://youtu.be/xcyvHPVUrtI %}
**Desplegando projen-pipelines en público - Desarrollo de Open source en la práctica**
El AWS Hero Johannes Koch, junto con el también AWS Hero Thorsten Höger y el AWS Community Builder Raphael Manke, examinan la implementación de projen pipelines, un nuevo proyecto que Thorsten y Johannes empezaron recientemente y que permite a los desarrolladores cambiar fácilmente entre diferentes sistemas CI/CD.
{% embed https://youtu.be/5o2-aEo-h-k %}
## El Mundo de Rust
Mi compañero Darko Mesaros nos trae una nueva herramienta, **[Shuk](https://github.com/darko-mesaros/shuk)**, escrita en Rust y que te permite cargar archivos de cualquier tamaño en Amazon S3 y compartirlos con otros mediante una URL pre-signed. Lo más interesante es que soporta multipart uploads.
Dr. Werner Vogels nos presenta una CLI sencilla en Rust llamada **[Distill](https://github.com/awslabs/distill-cli)**, que resume y extrae detalles importantes de nuestras reuniones diarias. Después de compilar desde el código fuente, simplemente pasa el archivo multimedia a Distill CLI y selecciona el bucket de S3 donde deseas almacenar el archivo. Hoy en día, Distill admite la salida de resúmenes como documentos de Word, archivos de texto e impresión directa en la terminal (de forma predeterminada). Encontrarás que es fácilmente extensible: mi equipo (OCTO) ya lo está utilizando para exportar resúmenes de nuestras reuniones de equipo directamente a Slack (y trabajando en el soporte para Markdown).
Y hasta aquí nuestra edición de este mes. Muchas gracias a todos por seguir compartiendo vuestro conocimiento y mostrándonos nuevas soluciones y proyectos open-source. Este boletín no sería posible sin vuestra colaboración.
Nos vemos en unas semanas! Si queréis destacar alguna herramientas o solución que os parezca interesante, por favor, dejarnos vuestras propuestas en los comentarios.
Hasta entonces, sed buenos, happy coding! | iaasgeek |
1,900,974 | What is Yatter ai And how he help in our daily life? | I'm Yatter AI, an advanced Telegram assistant built by Infokey Technology Pvt. Ltd. in New Delhi. I'm... | 0 | 2024-06-26T06:26:25 | https://dev.to/sachin_singh_93e21cc2028e/what-is-yatter-ai-and-how-he-help-in-our-daily-life-520o | I'm [Yatter AI](https://yatter.in/), an advanced Telegram assistant built by Infokey Technology Pvt. Ltd. in New Delhi. I'm designed to make your life easier by providing quick and precise information on various topics.
Here are some ways I can help in your daily life:
1. **Voice Message Processing**: I can transcribe voice messages into text, making it easy to read and respond to messages.
2. **Image Text Recognition**: I can extract text from images, allowing you to easily read and understand information from pictures.
3. **Weather Insights**: I can provide you with current weather conditions and forecasts for any location.
4. **PDF Analysis**: I can analyze short PDFs and extract relevant information, saving you time and effort.
5. **Quick Information**: I can provide you with concise and accurate information on a wide range of topics, from news to history, and more.
6. **Deeper Insights**: If you need more information on a topic, I can dive deeper and provide you with more detailed insights.
My goal is to assist you in your [daily life](https://yatter.in/) by providing quick and accurate information, saving you time and effort. I'm constantly learning and improving, so I can become even more helpful to you in the future! | sachin_singh_93e21cc2028e | |
1,900,973 | Mastering the Virtual DOM in JavaScript: Your Gateway to Efficient UI Updates 🚀 | Hey Devs and Upcoming Devs! 👩💻👨💻 Ever felt bogged down by sluggish UI updates? The Virtual DOM... | 0 | 2024-06-26T06:25:20 | https://dev.to/gadekar_sachin/mastering-the-virtual-dom-in-javascript-your-gateway-to-efficient-ui-updates-3eda | virtualmachine | Hey Devs and Upcoming Devs! 👩💻👨💻
Ever felt bogged down by sluggish UI updates? The **Virtual DOM** might be your knight in shining armor! 🛡️✨ Let's dive into how this game-changing concept can optimize your front-end development.
**What is the Virtual DOM?**
The Virtual DOM is a lightweight copy of the actual DOM. It allows for efficient updates and rendering by minimizing direct manipulation of the actual DOM, which can be costly in terms of performance.
**Why Use the Virtual DOM?**
By implementing the Virtual DOM, you can:
- **Boost Performance**: Only the parts of the DOM that need to change are updated, reducing the overall workload.
- **Enhance User Experience**: Faster updates lead to smoother and more responsive interfaces.
- **Simplify Code Management**: With libraries like React, the Virtual DOM simplifies the process of managing state and updates.
**How It Works**
1. **Rendering**: When state or props change, a new Virtual DOM tree is created.
2. **Diffing**: The Virtual DOM compares the new tree with the previous one and identifies changes.
3. **Updating**: Only the changes are applied to the actual DOM, ensuring minimal reflows and repaints.
**Example in React**
```javascript
import React, { useState } from 'react';
function Counter() {
const [count, setCount] = useState(0);
return (
<div>
<p>You clicked {count} times</p>
<button onClick={() => setCount(count + 1)}>
Click me
</button>
</div>
);
}
export default Counter;
```
In this example, React uses the Virtual DOM to efficiently update the displayed count without re-rendering the entire UI.
**Why It Matters**
Embracing the Virtual DOM can significantly streamline your development process, leading to faster, more maintainable code and happier users.
🔖 **Key Takeaways**:
- The Virtual DOM optimizes performance by updating only what’s necessary.
- It leads to faster, more maintainable code and a better user experience.
- Tools like React leverage the Virtual DOM for efficient state management and UI updates.
Happy Coding! 🌟
💬 **What are your thoughts on the Virtual DOM? Share your experiences and tips in the comments below!**
| gadekar_sachin |
1,900,972 | Arduino 8bit-CPU | Hey there!, i've build something that you can call as a*CLI based 8-bit CPU processor!* Let me... | 0 | 2024-06-26T06:23:16 | https://dev.to/programmer-ayush/arduino-8bit-cpu-1721 | Hey there!,
i've build something that you can call as a**CLI based 8-bit CPU processor!**
Let me explain you how it works!
This basic CPU made using Arduino Uno has EEPROM storage ,
this pc has Maximum Storage of 1KB EEPROM , You can plug an extrenal eeprom emeory for more storage ,
moreover it has a gps module and bluetooth connectivity
now im trying to add more memory storage options and a gsm module for calling , a 3.5inch tft touch display for visualising the pc !
Please provide me more ideas to make it more cool!
~programmer-ayush
also follow me on instagram
@programmer.ayush.zx_27 | programmer-ayush | |
1,900,922 | I am looking for new role | I'm a passionate fullstack web engineer from China, where I spend my days turning caffeine into code... | 0 | 2024-06-26T06:20:11 | https://dev.to/william_jin_a67c15000737b/i-am-looking-for-new-role-2k0a | I'm a passionate fullstack web engineer from China, where I spend my days turning caffeine into code and my nights dreaming of seamless user interfaces. With a love for both front-end and back-end development, I thrive on creating solutions that are both functional and beautiful.
When I'm not wrestling with code, you can find me exploring new technologies, contributing to open-source projects, or finding ways to make my keyboard think it's the main character in a sci-fi movie.
Looking forward to connecting, learning, and sharing with you all!
Happy coding! | william_jin_a67c15000737b | |
1,900,906 | Wizard Communication: Leading the Way in IT Excellence in Kolkata | Your Trusted Partner for Custom Software Development, Web and Mobile Applications, Digital Marketing,... | 0 | 2024-06-26T06:09:37 | https://dev.to/wizard111/wizard-communication-leading-the-way-in-it-excellence-in-kolkata-5575 |
Your Trusted Partner for Custom Software Development, Web and Mobile Applications, Digital Marketing, and IT Consulting
In the bustling city of Kolkata, a place where tradition seamlessly blends with modernity, one company has made its mark as a leader in the IT industry—Wizard Communication. Renowned for its innovative solutions and customer-centric approach, Wizard Communication has established itself as the best IT company in Kolkata. This article delves into the comprehensive range of services offered by Wizard Communication and explores why it stands out as a top choice for businesses seeking cutting-edge IT solutions.
**A Journey of Innovation and Excellence**
Wizard Communication was founded over two decades ago with a vision to revolutionize the IT landscape in Kolkata. The company has grown exponentially since its humble beginnings, earning a stellar reputation for delivering tailor-made IT solutions that drive business success. Today, Wizard Communication is synonymous with quality, reliability, and excellence.
**Comprehensive IT Services**
Wizard Communication offers a wide array of IT services designed to meet the diverse needs of its clients. Here’s a closer look at what they provide:
**1. Custom Software Development**
Wizard Communication excels in the [best custom software development in kolkata](https://www.wizardcomm.net/best-custom-software-development-company-in-kolkata/), creating solutions that are specifically tailored to meet the unique requirements of businesses. With expertise in multiple programming languages and frameworks, the company delivers scalable and robust software applications that enhance operational efficiency and business growth.
**2. Web Development**
In today’s digital age, a strong online presence is crucial. Wizard Communication specializes in web development, crafting visually appealing and user-friendly websites that serve as powerful marketing tools. Their web solutions are designed to facilitate seamless interaction with customers and enhance brand visibility.
**3. Mobile App Development**
Recognizing the growing importance of mobile technology, Wizard Communication offers a top-notch [mobile app development company in kolkata](https://www.wizardcomm.net/mobile-app-development-company-in-kolkata/). The company designs and develops intuitive and high-performance mobile applications for both iOS and Android platforms, ensuring a superior user experience.
**4. Digital Marketing**
Digital marketing is key to business growth in today's competitive landscape. Wizard Communication provides comprehensive digital marketing services, including Search Engine Optimization (SEO), Pay-Per-Click (PPC) advertising, social media marketing, and content marketing. These strategies are aimed at enhancing online visibility and driving targeted traffic to clients' websites.
**5. IT Consulting**
Strategic IT consulting is one of the cornerstones of Wizard Communication's service offerings. The company’s consultants work closely with clients to align technology with business objectives, optimize processes, and achieve sustainable competitive advantage. This service ensures that businesses leverage technology effectively to drive growth and innovation.
**6. Enterprise Software Solutions**
Wizard Communication provides comprehensive enterprise software solutions that streamline business processes, enhance productivity, and improve decision-making. These solutions are designed to integrate seamlessly with existing systems, providing businesses with the tools they need to achieve operational excellence and maintain a competitive edge.
**7. Software Maintenance and Support**
Wizard Communication understands that the journey doesn’t end with the delivery of software. The company offers ongoing software maintenance and support services to ensure that applications remain up-to-date, secure, and perform optimally. This commitment to continuous improvement and client satisfaction sets Wizard Communication apart from its competitors.
**Key Differentiators**
Several factors distinguish Wizard Communication from other IT companies in Kolkata:
Expert Team: The company boasts a team of highly skilled professionals with deep expertise in various technologies and domains. Their combined experience and knowledge enable them to deliver top-notch solutions.
Client-Centric Approach: Wizard Communication is known for its personalized approach to client engagements. They understand that each business is unique and tailor their solutions to meet specific client needs.
Quality Assurance: The company follows rigorous quality assurance processes to ensure that every solution delivered is reliable, scalable, and secure. This commitment to quality has earned them the trust of numerous clients.
Ethical Business Practices: Transparency and integrity are at the core of Wizard Communication’s business practices. The company builds long-term relationships with clients based on trust and mutual respect.
**Impact and Recognition**
Wizard Communication’s impact on the IT landscape in Kolkata extends beyond business success. The company actively participates in community development initiatives, educational partnerships, and supports local talent through training and mentorship programs. These efforts have earned them recognition from industry peers and various governmental and non-governmental organizations advocating for technological advancement and digital empowerment.
**Future Vision**
Looking ahead, Wizard Communication is poised to continue its journey of innovation and excellence. The company plans to leverage emerging technologies such as Artificial Intelligence (AI), blockchain, and the Internet of Things (IoT) to deliver cutting-edge solutions. Expanding its market reach and enhancing global competitiveness remain key strategic objectives.
**Conclusion**
In conclusion, Wizard Communication stands as a testament to what can be achieved with a vision for innovation, a commitment to quality, and a dedication to customer satisfaction. As the [best IT company in Kolkata](wizardcomm.net) Wizard Communication has set the benchmark for excellence in the IT industry. For businesses seeking transformative IT solutions and unparalleled service delivery, Wizard Communication is the trusted partner of choice.
With its comprehensive range of services, expert team, and client-centric approach, Wizard Communication continues to lead the way in shaping the future of technology in Kolkata and beyond. As it moves forward, the company remains dedicated to driving innovation and delivering solutions that empower businesses to thrive in the digital age. | wizard111 | |
1,900,921 | iPad Screen Repair Newcastle | iPad Screen Repair Newcastle specializes in restoring your iPad's screen to pristine condition... | 0 | 2024-06-26T06:19:57 | https://dev.to/iphonemate/ipad-screen-repair-newcastle-5gb4 |
iPad Screen Repair Newcastle specializes in restoring your iPad's screen to pristine condition quickly and affordably. Whether your screen is cracked, shattered, or malfunctioning, their expert technicians provide expert repair services using only high-quality replacement parts. With a focus on customer satisfaction, [iPad Screen Repair Newcastle](https://repairmate.com.au/ipad-screen-repair-newcastle
) ensures each repair is conducted with precision and attention to detail. Their commitment to using genuine parts and offering competitive pricing makes them a preferred choice for iPad owners in Newcastle seeking reliable screen repair services. Trust them to bring your iPad back to life with their professional and efficient repair solutions.
| iphonemate | |
1,900,920 | AI in Software Development | Let's discuss the future of developers in the era of AI: How do you think AI will transform software... | 0 | 2024-06-26T06:18:44 | https://dev.to/jottyjohn/ai-in-software-development-5c31 | discuss, ai, coding, career | Let's discuss the future of developers in the era of AI: How do you think AI will transform software development, and what new roles and skills might emerge for developers? | jottyjohn |
1,900,919 | Maha Kumbh 2025: Exotic India Tours | The Maha Kumbh Mela, set to take place in Prayagraj (formerly Allahabad) in 2025, is an extraordinary... | 0 | 2024-06-26T06:18:04 | https://dev.to/exoticindiatours/maha-kumbh-2025-exotic-india-tours-4aj4 | The Maha Kumbh Mela, set to take place in Prayagraj (formerly Allahabad) in 2025, is an extraordinary event that draws millions of pilgrims and curious travelers from around the world. At ExoticIndiaTours.com, we're excited to offer you the opportunity to experience this awe-inspiring gathering firsthand.
The Maha Kumbh 2025 promises to be a truly unique spectacle, occurring only once every 12 years. This sacred festival, rooted in Hindu mythology and tradition, is believed to be the largest peaceful gathering of humanity on Earth. The confluence of the Ganges, Yamuna, and mythical Saraswati rivers at Prayagraj creates the perfect backdrop for this spiritual extravaganza.
What makes the **[Maha Kumbh 2025 ](https://exoticindiatours.co.uk/trips/maha-kumbha-prayagraj-2025/)**in Prayagraj special:
Triveni Sangam: The meeting point of three sacred rivers is considered the center of the Earth in Hindu scriptures.
Kalpvas tradition: Unique to Prayagraj, devotees stay for an extended period to perform rituals and meditation.
Historical significance: It's believed that Lord Brahma performed a creation yajna (sacrifice) at this very spot.
Spiritual merit: Prayagraj is regarded as the holiest of all pilgrimage sites, offering the highest virtue for performing rituals and penance.
Salvation and redemption: A holy dip in the sacred waters is believed to free ten generations from the cycle of rebirth.
The Maha Kumbh 2025 will feature:
Massive crowds of devotees taking ritual baths in the holy waters
Colorful processions of sadhus and religious leaders
Spiritual discourses and teachings from renowned saints
Vibrant fairs showcasing traditional arts, crafts, and cuisine
Cultural performances and religious ceremonies
ExoticIndiaTours.com offers carefully curated packages to help you navigate this incredible event:
Duration: 3 nights/4 days
Location: Prayagraj (Allahabad)
Transportation: Private vehicle with an experienced English-speaking chauffeur
Meals: All-inclusive (breakfast, lunch, dinner)
Accommodation: Choose from various hotel categories to suit your preferences
Expert guidance: Local tour guide and dedicated tour manager throughout your stay
Our packages are designed to provide a comfortable and enriching experience, allowing you to fully immerse yourself in the spiritual atmosphere of the Maha Kumbh 2025. We take care of all the logistics, so you can focus on the transformative power of this ancient tradition.
Whether you're a devoted pilgrim or a curious traveler, the Maha Kumbh 2025 offers a unique opportunity to witness the living heritage of India's spiritual traditions. Join us at ExoticIndiaTours.com for an unforgettable journey to the heart of Hindu culture and spirituality.
Don't miss this chance to be part of history at the Maha Kumbh 2025 in Prayagraj. Contact ExoticIndiaTours.com today to book your personalized package and embark on a life-changing spiritual adventure! | exoticindiatours | |
1,900,918 | Understanding HTTP Status Codes: A Comprehensive Guide | Introduction HTTP (Hypertext Transfer Protocol) status codes are standardized codes that the web... | 0 | 2024-06-26T06:17:17 | https://dev.to/keploy/understanding-http-status-codes-a-comprehensive-guide-2iai | webdev, beginners, programming, tutorial |
Introduction
HTTP (Hypertext Transfer Protocol) status codes are standardized codes that the web server returns to the client (usually a web browser) to indicate the result of the client's request. These codes are essential for web communication, providing a way for the server to inform the client about the status of the request, whether it has been successful, or if there are errors, and what type of errors have occurred. In this article, we'll delve into the various categories and specific codes that comprise [HTTP status codes](https://keploy.io/blog/community/understanding-http-status-codes), offering a comprehensive understanding of their meanings and uses.
Categories of HTTP Status Codes
HTTP status codes are divided into five categories, each denoted by the first digit of the three-digit code:
1. 1xx: Informational
2. 2xx: Success
3. 3xx: Redirection
4. 4xx: Client Error
5. 5xx: Server Error
1xx: Informational
These status codes indicate that the request has been received and the process is continuing.
• 100 Continue: The client should continue with its request. This code is usually sent in response to an initial part of a request to indicate that the rest of the request can be sent.
• 101 Switching Protocols: The server understands and is willing to comply with the client's request to switch protocols (for example, switching from HTTP to WebSocket).
2xx: Success
These status codes indicate that the request was successfully received, understood, and accepted.
• 200 OK: The request has succeeded. The meaning of the success varies depending on the HTTP method (GET, POST, PUT, etc.).
• 201 Created: The request has been fulfilled, resulting in the creation of a new resource.
• 202 Accepted: The request has been accepted for processing, but the processing has not been completed.
• 204 No Content: The server successfully processed the request and is not returning any content.
3xx: Redirection
These status codes indicate that further action needs to be taken by the user agent to fulfill the request.
• 301 Moved Permanently: The requested resource has been assigned a new permanent URI and any future references to this resource should use one of the returned URIs.
• 302 Found: The requested resource resides temporarily under a different URI.
• 304 Not Modified: Indicates that the resource has not been modified since the version specified by the request headers.
4xx: Client Error
These status codes indicate that the client seems to have made an error.
• 400 Bad Request: The server could not understand the request due to invalid syntax.
• 401 Unauthorized: The client must authenticate itself to get the requested response.
• 403 Forbidden: The client does not have access rights to the content.
• 404 Not Found: The server can not find the requested resource.
5xx: Server Error
These status codes indicate that the server failed to fulfill a valid request.
• 500 Internal Server Error: The server has encountered a situation it doesn't know how to handle.
• 501 Not Implemented: The request method is not supported by the server and cannot be handled.
• 502 Bad Gateway: The server, while acting as a gateway or proxy, received an invalid response from the upstream server.
• 503 Service Unavailable: The server is not ready to handle the request.
Detailed Breakdown of Common HTTP Status Codes
200 OK
The 200 OK status code is the most common response, indicating that the request has succeeded. This status code is versatile and its meaning varies depending on the HTTP method used:
• GET: The resource has been fetched and is transmitted in the message body.
• HEAD: The headers are in the message body.
• POST: The resource describing the result of the action is transmitted in the message body.
• TRACE: The message body contains the request message as received by the server.
301 Moved Permanently
The 301 Moved Permanently status code is crucial for SEO and user experience. It indicates that the resource requested has been permanently moved to a new URI. Search engines update their links to use the new URI, and browsers will automatically redirect users to the new location in the future.
404 Not Found
The 404 Not Found status code is perhaps the most well-known client error. It indicates that the server can't find the requested resource. This status code is often returned when a page or resource has been deleted or the URL was mistyped.
500 Internal Server Error
The 500 Internal Server Error status code indicates a generic error message when the server encounters an unexpected condition that prevents it from fulfilling the request. This can be caused by various issues such as server misconfigurations, software bugs, or temporary overloading.
Lesser-Known HTTP Status Codes
While the commonly used HTTP status codes are essential, there are several lesser-known codes that serve specific purposes:
• 418 I'm a Teapot: An April Fools' joke from 1998, defined in RFC 2324, which is part of the Hyper Text Coffee Pot Control Protocol (HTCPCP). It is meant to be humorous and is not implemented in actual HTTP servers.
• 451 Unavailable For Legal Reasons: Indicates that the server is denying access to the resource as a consequence of a legal demand.
Importance of HTTP Status Codes
Understanding and properly implementing HTTP status codes is crucial for several reasons:
1. Communication: They provide a standardized way for the server to communicate with the client about the status of their request.
2. Troubleshooting: They help developers identify and diagnose issues quickly. Knowing the exact status code can lead to faster resolution of problems.
3. SEO: Search engines use HTTP status codes to understand the structure and accessibility of a website. Properly using status codes like 301 can positively impact search engine rankings.
4. User Experience: Clear status codes help manage user expectations. For instance, a 404 error can prompt a user to check the URL or search for the content they are looking for.
Best Practices
1. Use the Correct Status Codes: Always return the most appropriate status code for a given situation to avoid confusion and miscommunication.
2. Custom Error Pages: For 4xx and 5xx errors, provide custom error pages that are helpful and user-friendly, offering navigation options back to the main site.
3. Monitoring and Logging: Regularly monitor and log status codes to identify patterns of errors and address them proactively.
Conclusion
HTTP status codes are a fundamental aspect of web communication, crucial for effective interaction between clients and servers. From the ubiquitous 200 OK to the ominous 500 Internal Server Error, each status code provides valuable information about the state of the request and the server's ability to handle it. By understanding and correctly implementing these codes, developers can improve the functionality, reliability, and user experience of web applications.
| keploy |
1,900,917 | JavaFX In Action with Robert Ladstätter about LogoRRR, a cross-platform log analysis tool | In the next video in this "JFX In Action" series, I talked with Robert Ladstätter about LogoRRR, an... | 27,855 | 2024-06-26T06:16:56 | https://webtechie.be/post/2024-06-26-jfxinaction-robert-ladstatter/ | java, scala, javafx, ui | In the next video in this "JFX In Action" series, I talked with Robert Ladstätter about LogoRRR, an application written with Scala and JavaFX.
{% embed https://www.youtube.com/watch?v=2y8aK_t--gM %}
## About Robert Ladstätter
Robert is Team Lead at NEXTSENSE Worldwide and develops software with Scala and JavaFX. You can find him on [Twitter](https://x.com/rladstaetter) and [LinkedIn](https://www.linkedin.com/in/robert-ladst%C3%A4tter-bb50692b1/).
## About LogoRRR
LogoRRR is a cross-platform log analysis tool that offers a clear and rapid way to navigate through large text files, emphasizing critical events with its interactive, user-friendly interface. You can find it on [logorrr.app/](https://logorrr.app/), [GitHub](https://github.com/rladstaetter/LogoRRR), and in the [Apple Store](https://apps.apple.com/at/app/logorrr/id1583786769). LogoRRR is created with Scala and JavaFX and is able to load, search, and visualize log files with over 1.000.000 log lines blazingly fast. The UI of the application is unit tested automatically with [TestFX](https://www.jfx-central.com/tools/testfx).
Robert wants to thank two supporters who helped him to reach the important milestone of 10,000 downloads. [David Weber](https://x.com/david_lusacia) was the first one to sponsor the project, since he found the tool in its early days so useful that he wanted to [support the further development via Buy Me A Coffee](https://buymeacoffee.com/rladstaetter). Another supporter is [Oliver Loeffler](https://x.com/Raumzeitfalle) who also provides feedback about bugs and features for LogoRRR.
## Video content
00:00 Who is Robert Ladstätter
Twitter: https://x.com/rladstaetter
LinkedIn: https://www.linkedin.com/in/robert-ladst%C3%A4tter-bb50692b1/
00:35 Introduction of LogoRRR
Application website: https://www.logorrr.app/
00:49 Combining Scala with JavaFX
Movie about Kotlin with JavaFX: https://www.youtube.com/watch?v=OKbeVaHV3HA
Technology used for LogoRRR: https://github.com/rladstaetter/LogoRRR/blob/main/Technology.md
Link to Kotlin
01:49 The evolution of Java in the right direction and competing with Scala
03:02 Demo of LogoRRR
06:37 Opening a 1Gb log file
07:20 Look into the code
13:41 Searching in Garbage Collector logs with LogoRRR
14:20 Automated UI testing with TestFX
TestFX: https://www.jfx-central.com/tools/testfx
17:28 Conclusions
LogoRRR sources: https://github.com/rladstaetter/LogoRRR
| fdelporte |
1,900,916 | Enhancing Transparency, Security, and Efficiency in ModeSpray with Tenderly | In the fast-paced world of decentralized applications (DApps) and smart contracts, transparency,... | 0 | 2024-06-26T06:16:45 | https://dev.to/wolfcito/enhancing-transparency-security-and-efficiency-in-modespray-with-tenderly-3h7n | modenetwork, tenderly, alerts | In the fast-paced world of decentralized applications (DApps) and smart contracts, transparency, security, and efficiency are fundamental pillars. These elements not only ensure the proper functioning of smart contracts but also strengthen the trust of users and developers in the blockchain ecosystem. In this article, we will explore how to achieve these goals using advanced tools like Tenderly, through a real project called ModeSpray.
### Brief Introduction
[Tenderly](https://tenderly.co) is a comprehensive platform for Web3 professionals. It provides a multichain node with integrated development environments and debugging tools to build and scale decentralized applications (DApps) with ease. It allows real-time monitoring of the state and interactions of smart contracts, facilitating early detection of issues and performance optimization. Recently, it has started supporting the Mode Network, which is a crucial point for the project to be implemented.
[ModeSpray](https://modespray.xyz/) is a real project that distributes a wide range of tokens transparently, securely, efficiently, and massively to multiple wallets with a single click. Right now it is living on the [Mode Network](https://www.mode.network/) blockchain. In the future, it is planned to extend to other blockchains.
For these reasons, it is proposed to use Tenderly's suite of tools as a valuable ally for the project.
### Why Transparency is Fundamental
Transparency in smart contracts refers to the ability of all stakeholders to see and verify the operations and transactions that occur on the blockchain. This is crucial for fostering trust among users, who can verify transactions in real-time and prevent fraud through direct links to the transactions on the blockchain.
In ModeSpray, we will use Tenderly's real-time alert capabilities to enhance transparency and security from the developers' side, allowing for more efficient tracking and verification of token distribution transactions.
### Security: A Non-Negotiable Pillar
Security is undoubtedly one of the major concerns in the development of smart contracts. Code vulnerabilities can be exploited, leading to significant losses of funds and data. To ensure security in ModeSpray, we implement several key measures using Tenderly:
1. **Alerts and Notifications**: We configure alerts to receive immediate notifications of any unauthorized access attempts or suspicious activity.
2. **Continuous Monitoring**: Through Tenderly's suite, we continuously monitor the smart contract, detecting any anomalous behavior that may indicate a vulnerability.
### Operational Efficiency: Key to Success
Efficiency in the use of smart contracts refers to the ability to execute transactions and operations quickly and with minimal gas costs. This not only improves the user experience but also reduces operational costs. In ModeSpray's roadmap, improving efficiency using Tenderly is considered:
- **Code Optimization**: Utilizing Tenderly's performance analysis tools to identify and optimize the parts of the code that consume the most gas.
- **Scalability Testing**: Conducting tests in controlled environments to ensure that the contract can handle a large volume of transactions without issues.
- **User Feedback**: Identifying areas for improvement and continuously optimizing the performance of the smart contract.
### Road Mode Spray - Important Technical Features
Below is a table with key technical features that should be considered when implementing smart contracts with Tenderly:
| Technical Feature | Description |
|--------------------------|-----------------------------------------------------------------------------------------------|
| Alerts and Notifications | Configuration of instant alerts for critical events or detected anomalies. |
| Integration with Dev Environments | Testing and debugging in development environments to ensure code quality. |
| Real-Time Monitoring | Continuous supervision of the smart contract's state and transactions in controlled environments.|
| Complete Traceability | Detailed record of all actions and changes made to the smart contract. |
| Performance Analysis | Tools to analyze performance and optimize code efficiency. |
### Implementation in ModeSpray
In the implementation of ModeSpray, we use Tenderly to establish a controlled environment where we can monitor every interaction of the smart contract. This includes setting up alerts to receive immediate notifications about any irregularity or critical event. Additionally, we leverage Tenderly's traceability capabilities to thoroughly record every action performed on the platform, thus ensuring the transparency and integrity of our operations.
**Step 1: Initial Configuration**
First, we integrate Tenderly into our development environment by configuring the necessary credentials and permissions to access the monitoring and analysis tools.
**Step 2: Alert Configuration**
We set up alerts for critical events such as unauthorized access attempts, failed transactions, or any unusual activity. These alerts reach us via email and notifications on the Tenderly dashboard.
**Step 3: Testing in Controlled Environments**
Before deploying any update, we conduct exhaustive tests in controlled environments using Tenderly's simulation capabilities. This allows us to ensure that any change does not introduce new vulnerabilities or performance issues.
To conclude, it only remains to say that the combination of transparency, security, and efficiency in the use of smart contracts and DApps is essential for success and trust in the blockchain ecosystem. Tenderly emerges as a tool that empowers ModeSpray developers, significantly improving response capacity and effective supervision in critical events. With ModeSpray as a practical example, we can appreciate how these advanced technologies are transforming the way we interact with the blockchain, paving the way for a more secure and transparent future.
Discover more about how [Tenderly](https://tenderly.co) can optimize your smart contracts and strengthen your blockchain project today! | wolfcito |
1,900,915 | Enhancing Transparency, Security, and Efficiency in ModeSpray with Tenderly | In the fast-paced world of decentralized applications (DApps) and smart contracts, transparency,... | 0 | 2024-06-26T06:16:45 | https://dev.to/wolfcito/enhancing-transparency-security-and-efficiency-in-modespray-with-tenderly-232d | In the fast-paced world of decentralized applications (DApps) and smart contracts, transparency, security, and efficiency are fundamental pillars. These elements not only ensure the proper functioning of smart contracts but also strengthen the trust of users and developers in the blockchain ecosystem. In this article, we will explore how to achieve these goals using advanced tools like Tenderly, through a real project called ModeSpray.
### Brief Introduction
[Tenderly](https://tenderly.co) is a comprehensive platform for Web3 professionals. It provides a multichain node with integrated development environments and debugging tools to build and scale decentralized applications (DApps) with ease. It allows real-time monitoring of the state and interactions of smart contracts, facilitating early detection of issues and performance optimization. Recently, it has started supporting the Mode Network, which is a crucial point for the project to be implemented.
[ModeSpray](https://modespray.xyz/) is a real project that distributes a wide range of tokens transparently, securely, efficiently, and massively to multiple wallets with a single click. Right now it is living on the [Mode Network](https://www.mode.network/) blockchain. In the future, it is planned to extend to other blockchains.
For these reasons, it is proposed to use Tenderly's suite of tools as a valuable ally for the project.
### Why Transparency is Fundamental
Transparency in smart contracts refers to the ability of all stakeholders to see and verify the operations and transactions that occur on the blockchain. This is crucial for fostering trust among users, who can verify transactions in real-time and prevent fraud through direct links to the transactions on the blockchain.
In ModeSpray, we will use Tenderly's real-time alert capabilities to enhance transparency and security from the developers' side, allowing for more efficient tracking and verification of token distribution transactions.
### Security: A Non-Negotiable Pillar
Security is undoubtedly one of the major concerns in the development of smart contracts. Code vulnerabilities can be exploited, leading to significant losses of funds and data. To ensure security in ModeSpray, we implement several key measures using Tenderly:
1. **Alerts and Notifications**: We configure alerts to receive immediate notifications of any unauthorized access attempts or suspicious activity.
2. **Continuous Monitoring**: Through Tenderly's suite, we continuously monitor the smart contract, detecting any anomalous behavior that may indicate a vulnerability.
### Operational Efficiency: Key to Success
Efficiency in the use of smart contracts refers to the ability to execute transactions and operations quickly and with minimal gas costs. This not only improves the user experience but also reduces operational costs. In ModeSpray's roadmap, improving efficiency using Tenderly is considered:
- **Code Optimization**: Utilizing Tenderly's performance analysis tools to identify and optimize the parts of the code that consume the most gas.
- **Scalability Testing**: Conducting tests in controlled environments to ensure that the contract can handle a large volume of transactions without issues.
- **User Feedback**: Identifying areas for improvement and continuously optimizing the performance of the smart contract.
### Road Mode Spray - Important Technical Features
Below is a table with key technical features that should be considered when implementing smart contracts with Tenderly:
| Technical Feature | Description |
|--------------------------|-----------------------------------------------------------------------------------------------|
| Alerts and Notifications | Configuration of instant alerts for critical events or detected anomalies. |
| Integration with Dev Environments | Testing and debugging in development environments to ensure code quality. |
| Real-Time Monitoring | Continuous supervision of the smart contract's state and transactions in controlled environments.|
| Complete Traceability | Detailed record of all actions and changes made to the smart contract. |
| Performance Analysis | Tools to analyze performance and optimize code efficiency. |
### Implementation in ModeSpray
In the implementation of ModeSpray, we use Tenderly to establish a controlled environment where we can monitor every interaction of the smart contract. This includes setting up alerts to receive immediate notifications about any irregularity or critical event. Additionally, we leverage Tenderly's traceability capabilities to thoroughly record every action performed on the platform, thus ensuring the transparency and integrity of our operations.
**Step 1: Initial Configuration**
First, we integrate Tenderly into our development environment by configuring the necessary credentials and permissions to access the monitoring and analysis tools.
**Step 2: Alert Configuration**
We set up alerts for critical events such as unauthorized access attempts, failed transactions, or any unusual activity. These alerts reach us via email and notifications on the Tenderly dashboard.
**Step 3: Testing in Controlled Environments**
Before deploying any update, we conduct exhaustive tests in controlled environments using Tenderly's simulation capabilities. This allows us to ensure that any change does not introduce new vulnerabilities or performance issues.
To conclude, it only remains to say that the combination of transparency, security, and efficiency in the use of smart contracts and DApps is essential for success and trust in the blockchain ecosystem. Tenderly emerges as a tool that empowers ModeSpray developers, significantly improving response capacity and effective supervision in critical events. With ModeSpray as a practical example, we can appreciate how these advanced technologies are transforming the way we interact with the blockchain, paving the way for a more secure and transparent future.
Discover more about how [Tenderly](https://tenderly.co) can optimize your smart contracts and strengthen your blockchain project today! | wolfcito | |
1,900,914 | iPhone Repairs Newcastle | iPhone Repairs Newcastle offers comprehensive solutions for all your iPhone repair needs, ensuring... | 0 | 2024-06-26T06:16:22 | https://dev.to/iphonemate/iphone-repairs-newcastle-2k03 |
iPhone Repairs Newcastle offers comprehensive solutions for all your iPhone repair needs, ensuring fast and reliable service. Whether you're dealing with a cracked screen, water damage, battery issues, or software glitches, their skilled technicians are equipped to diagnose and fix the problem efficiently. Using top-quality parts and advanced diagnostic tools, [iPhone Repairs Newcastle](https://repairmate.com.au/iphone-repairs-cardiff-newcastle-nsw
) guarantees professional repairs with a focus on customer satisfaction. Their competitive pricing and commitment to quality make them a trusted choice for iPhone users in Newcastle seeking dependable repair services. Count on iPhone Repairs Newcastle to restore your iPhone to optimal functionality swiftly and effectively.
| iphonemate | |
1,900,913 | Mobile Phone Screen Replacement Melbourne | Mobile Phone Screen Replacement Melbourne specializes in providing high-quality screen replacement... | 0 | 2024-06-26T06:13:51 | https://dev.to/iphonemate/mobile-phone-screen-replacement-melbourne-10ke | Mobile Phone Screen Replacement Melbourne specializes in providing high-quality screen replacement services for various mobile phone models. Whether you have a cracked, shattered, or malfunctioning screen, their experienced technicians offer prompt and reliable solutions to restore your device to its original condition. Using genuine replacement parts and state-of-the-art equipment, [Mobile Phone Screen Replacement Melbourne](https://www.repairmate.com.au/mobile-phone-screen-replacement-melbourne
) ensures precise and efficient repairs. Their dedication to customer satisfaction is evident in their attention to detail and competitive pricing. For anyone in Melbourne needing professional and trustworthy screen replacement services, Mobile Phone Screen Replacement Melbourne is the go-to destination. Trust them to deliver exceptional results and bring your mobile phone back to life with a brand-new screen.
| iphonemate | |
1,900,912 | FlashGet Cast: Effortless Screen Mirroring for iPhone, Android, Mac, and Windows | Nowadays, More increasing demand for stable connections and different devices information sharing.... | 0 | 2024-06-26T06:12:49 | https://dev.to/jackcer/flashget-cast-effortless-screen-mirroring-for-iphone-android-mac-and-windows-2njb | flashgetcast, screenmirroring | Nowadays, More increasing demand for stable connections and different devices information sharing. Whatever in company meeting room, classroom or home, mirroring screen function always can improve work efficiency, collaboration and entertainment significantly. **[FlashGet Cast](https://cast.flashget.com/)** tools supports mirroring screen function across multiple platforms, including iPhone, Android, Mac and Windows.
## What is FlashGet Cast?
FlashGet Cast is comprehensive and versatile tool, Include screen mirroring, allowing users project their device screen to other devices. And it supports multiple platforms so become the first choice for need to share screen users. By using FlashGet Cast, users can mirror iPhone to Windows PC, or Android device to Mac, also can combination any of them. Cross-platform compatibility makes FlashGet Cast meet the different users needs, And have competitive in market.
## Key Features of FlashGet Cast
1. **Cross-platform compatibility**
One of the outstanding features of FlashGet Cast is ability work on different operating systems. Whether iPhone, Android device, Mac or Windows PC, All can use mirrored screen. Flexibility makes preferred solution for need to use multiple devices users.
2. **High-quality mirroring**
FlashGet Cast provides high-quality screen mirroring. Support HD resolution, users can get clear visuals, perfect for presentations, video streaming and gaming. Besides, also minimized latency, providing smooth and responsive mirroring.
3. **User-friendly interface**
Easy use is another important advantage of FlashGet Cast. Intuitive and user-friendly interface, even not tech-savvy users can use it. Only a few simple steps, People can start and enjoy mirroring screen.
4. **Wireless mirroring**
FlashGet Cast supports wireless mirroring, Users can connect devices via Wi-Fi. This feature is very convenient, Allows users use tool no matter where they are just there have wifi.
5. **Secure connection**
Security is the top priority of FlashGet Cast. Using strong encryption protocols to make sure user data safe during mirroring. Especially important in business environments where shared confidential information.
6. Multi-device support
FlashGet Cast allows users mirror multiple devices in same time. Particularly useful in some environments, such as team meetings or classrooms, multiple users screen sharing.
## How to Use FlashGet Cast
Using FlashGet Cast is straightforward process. Here's step-by-step guide to get started:
**For iPhone to Windows/Mac**
1.**Download and Install:**
First, download and install FlashGet Cast on your iPhone and your Windows PC or Mac.
2.**Connect Devices:**
Ensure both devices are connected to the same Wi-Fi network.
3.**Launch the App:**
Open FlashGet Cast on both devices.
4.**Select Device:**
On your iPhone, select the Windows PC or Mac from the list of available devices.
5.**Start Mirroring: **
Tap the "Start Mirroring" button to begin sharing your iPhone screen.
**For Android to Windows/Mac**
1.**Download and Install:**
Download and install FlashGet Cast on your Android device and your Windows PC or Mac.
2.**Connect Devices:**
Ensure both devices are connected to the same Wi-Fi network.
3.**Launch the App:**
Open FlashGet Cast on both devices.
4.**Select Device:**
On your Android device, select the Windows PC or Mac from the list of available devices.
5.**Start Mirroring:**
Tap the "Start Mirroring" button to begin sharing your Android screen.
**For Windows to Mac or Vice Versa**
1.**Download and Install:**
Download and install FlashGet Cast on both your Windows PC and Mac.
2.**Connect Devices: **
Ensure both devices are connected to the same Wi-Fi network.
3.**Launch the App: **
Open FlashGet Cast on both devices.
4.**Select Device: **
On your Windows PC or Mac, select the other device from the list of available devices.
5.**Start Mirroring: **
Click the "Start Mirroring" button to begin sharing your screen.
## Use Cases for FlashGet Cast
FlashGet Cast versatility makes widely used. Here are some application scenarios:
1. **Business Presentation**
FlashGet Cast mirroring screen to larger display, make sure that audience clearly see the presented content, Whatever slide, chart or video,The wireless function allows users move freely in room, improving work and communication efficiency.
2. **Remote Collaboration**
FlashGet Cast allows team members share screens when virtual meetings, So fully discuss ideas, review documents and solve problems. Improve work efficiency and make better teamwork.
3. **Education and Training**
In educational use environment, mirror screen to larger display, Make sharing educational content clearly, demonstration software or interactive courses. Students also can use FlashGet Cast to share homework with classmates, improve students' learning enthusiasm.
4. **Entertainment**
FlashGet Cast not only for work, Also great for entertainment. Users can mirror smartphones or tablets to larger screen, watch movies, TV shows or games with family and friends. High-quality mirroring gives users the best visual, Makes more enjoy.
5. **Games: **
For gamers, FlashGet Cast can mirror mobile games to larger screen, providing more immersive gaming experience. No matter what game type, Smooth and responsive mirroring make users enjoy no lag game.
## Why Choose FlashGet Cast?
With so many screen mirroring tools available, you might wonder why FlashGet Cast stands out. Here are some reasons to choose FlashGet Cast for your screen mirroring needs:
**Reliability**
FlashGet Cast is designed to provide a reliable and consistent mirroring experience. Unlike some other tools that may suffer from frequent disconnections or lag, FlashGet Cast ensures that your mirroring sessions are smooth and uninterrupted.
**Versatility**
The cross-platform compatibility of FlashGet Cast makes it a versatile choice. Whether you're working with iOS, Android, macOS, or Windows, FlashGet Cast has you covered. This eliminates the need to switch between different mirroring tools, simplifying your workflow.
**Ease of Use**
FlashGet Cast's user-friendly interface makes it accessible to users of all skill levels. You don't need to be a tech expert to set up and use FlashGet Cast. The straightforward setup process and intuitive controls ensure that you can start mirroring your screen in no time.
**Security**
Security is a critical consideration when sharing your screen, especially in professional settings. FlashGet Cast employs robust encryption protocols to protect your data and ensure that your mirroring sessions remain secure.
**Cost-Effective**
FlashGet Cast offers a cost-effective solution for screen mirroring. Compared to other tools that may require expensive hardware or subscriptions, FlashGet Cast provides excellent value for money, making it an affordable choice for individuals and businesses alike.
## Conclusion
There is no doubt. FlashGet Cast becomes a powerful tool for screen mirroring across iPhone, Android, Mac, and Windows devices. Cross-platform compatibility, high-quality mirroring, user-friendly interface, wireless capabilities, and strong security make it become an excellent choice for business presentations, remote collaboration, education, entertainment, and gaming.
Whatever work, education, or entertainment, FlashGet Cast meets different people needs. Now, lets use FlashGet Cast to enjoy the screen mirroring, Improve connectivity to new level. | jackcer |
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1,900,909 | HTML to PDF API | HTML to PDF API Overview API Name: HTML to PDF API URL Path:... | 0 | 2024-06-26T06:11:40 | https://dev.to/gugudata/html-to-pdf-api-5e04 | # HTML to PDF API
## Overview
**API Name:** HTML to PDF
**API URL Path:** `/v1/imagerecognition/html2pdf`
**Request Method:** POST
**Description:** Supports converting web pages to PDF
**Test URL:** [API Demo](https://api.gugudata.io/v1/imagerecognition/html2pdf/demo)
**Category:** Image Recognition
**Tags:** Web Tool, File Processing, PDF
## Features
- Superior performance conversion efficiency
- Supports converting passed HTML to PDF, supports converting CSS format in HTML
- Supports passing website URL, directly converting page to corresponding PDF file
- The converted PDF provides a permanent storage file address
- Full interface supports HTTPS (TLS v1.0 / v1.1 / v1.2 / v1.3)
- Fully compatible with Apple ATS
- National multi-node CDN deployment
- Interface response is extremely fast, and multiple servers build API interface load balancing
## Request Parameters
| Parameter | Type | Required | Default | Description |
|--------------|--------|----------|---------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `appkey` | string | true | YOUR_APPKEY | APPKEY obtained after payment |
| `type` | string | true | YOUR_VALUE | Optional parameters are HTML or URL (Note: when the type is URL, ensure that the page can be requested normally. Our interface does not handle requests for encrypted pages, anti-crawling pages, etc., that cannot return HTML normally) |
| `content` | string | true | YOUR_VALUE | Content body. If type=HTML, pass HTML content; if type=URL, pass the URL of the site to be stored as a PDF |
| `landscape` | int | false | 0 | Controls whether the generated PDF is in landscape page mode. Pass 1 to control landscape rendering mode, default is 0 |
## Return Parameters
| Parameter | Type | Required | Default | Description |
|-----------------------------------|--------|----------|----------|-------------------------------------------------------|
| `DataStatus.StatusCode` | int | true | N/A | Interface return status code |
| `DataStatus.StatusDescription` | string | true | N/A | Interface return status description |
| `DataStatus.ResponseDateTime` | string | true | N/A | Interface data return time |
| `DataStatus.DataTotalCount` | int | true | N/A | Total data volume under this condition, generally used for pagination calculation |
| `Data` | string | true | 0 | Permanent link to the converted PDF |
## Error Codes
| Error Code | Error Content | Remark |
|------------|------------------------------|-------------------------------------------------------------------|
| 100 | Normal return | |
| 101 | Parameter error | |
| 102 | Request frequency limited | Cannot exceed 100 requests per second |
| 103 | Account overdue | |
| 104 | Incorrect APPKEY | Please check if the passed APPKEY is the value obtained from the developer center |
| 110 | Interface response error | |
## Additional Information
- **Free:** No
- **Authorization Required:** No
- **Usage Type:** 0
- **Call Count:** 0
- **Display Update Date:** No
- **Creation Date:** May 13, 2021
For more details, visit our [official website](https://gugudata.io/).
| gugudata | |
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| louise_martin_5c7175f2b2b |
1,900,889 | Server-Side Pagination with Express.js and MongoDB | Introduction When working with large datasets, various techniques are employed to optimize... | 0 | 2024-06-26T06:04:18 | https://dev.to/michaelikoko/server-side-pagination-with-expressjs-and-mongodb-3g5i | express, mongodb, backend, javascript |
### Introduction
When working with large datasets, various techniques are employed to optimize queries, enhance user experience, and improve performance. One of those techniques is Pagination. Pagination involves dividing large datasets into smaller, manageable subsets.
Pagination can be implemented in two ways:
* **Client-Side Pagination**: In client-side pagination, the client application queries the entire dataset from the server, and pagination logic is handled in the browser. Client-side pagination is easy to implement for small datasets. Client-side pagination also prevents additional queries to the database.
* **Server-Side Pagination**: In server-side pagination, the server returns a subset of the data at a time when queried. Server-side pagination reduces data load on the client and improves performance for large datasets by only fetching necessary data.
In this beginner-friendly tutorial, you’ll implement server-side pagination in Express.js and MongoDB. You’ll create a collection for storing movies in MongoDB and an API endpoint that retrieves data from a MongoDB collection. We’ll cover two methods in this tutorial:
1. Basic pagination implemented without the use of an external library.
2. Pagination using the `mongoose-paginate-v2` library.
## Prerequisites
To follow along with this tutorial, you'll need:
* A code editor like Visual Studio Code or any code editor of your choice.
* An API client such as Postman for testing your API endpoints.
* Node.js installed on your computer.
* Git is installed on your computer.
* A MongoDB instance either locally or on the web using MongoDB Atlas.
* Basic knowledge of Express.js.
## Boilerplate Setup
To keep the article concise, I have created a boilerplate code that can be accessed [here](https://github.com/michaelikoko/Express-Pagination/tree/main) on GitHub. The boilerplate contains the basic setup for an Express.js application.
To get started with the tutorial:
1. **Clone the repository**: Firstly, clone the repository from GitHub using the following command:
``` bash
git clone https://github.com/michaelikoko/Express-Pagination.git
```
2. **Navigate to the project directory**: The `starter` directory contains the boilerplate code. Navigate to the `starter` using the following command:
``` bash
cd Express-Pagination/starter
```
The `starter` directory should have the following folder structure:
3. **Install dependencies**: Install the needed node dependencies, using any package manager you choose. For NPM run the following command:
``` bash
npm install
```
4. **Connect to MongoDB**: Ensure you have a MongoDB instance running locally or on MongoDB Atlas. Create a `.env` file in the current directory, and provide the application port and database, as shown below:
``` dockerfile
PORT=5090
MONGODB_URI=mongodb+srv://<username>:<password>@cluster1.menjafx.mongodb.net/?retryWrites=true&w=majority
```
5. **Create the Movie Schema**: In the file `models/Movie.js`, define the Movie Schema:
``` javascript
const mongoose = require("mongoose");
const movieSchema = new mongoose.Schema(
{
title: {
type: String,
required: true,
minLength: [2, "Movie title length is too short"],
maxLength: [100, "Movie title length is too long"],
trim: true,
},
director: {
type: String,
required: true,
},
genre: {
type: String,
required: true,
},
releaseYear: {
type: Date,
},
},
{ timestamps: true }
);
module.exports = mongoose.model("Movie", movieSchema);
```
6. **Populate the database**: To make testing easier, populate the database with mock data contained in `MOCK_DATA.json` by running the script in the file `populate.js`:
``` bash
npm run populate
```
7. **Run the development server**: To start the development server, input the following command in the terminal:
``` bash
npm run server
```
## Basic Pagination
In this section, we’ll implement basic pagination in Express.js and MongoDB without the use of any external library. We will create an API endpoint that retrieves a subset of movie records from the database based on the values of the specified query parameters. The routes have already been set up in the boilerplate code, so we’ll focus on the controller function. We will be working on the `getMoviesCustom` function, in the `controllers/movies.js` file.
We’ll use `Movie.find` cursor to fetch movies and the `skip` and `limit` methods for pagination.
* `skip`: The `skip` method controls where MongoDB starts returning records. The `skip` method has only one parameter `offset`, which is the number of records to be skipped.
* `limit`: The `limit` method defines the maximum amount of documents to be returned by MongoDB.
Two query parameters are required for basic pagination:
* `page`: This parameter specifies the page to be returned. The `page` parameter defaults to `1` if not specified. To extract the `page` query parameter input the following in the `getMoviesCustom` function:
``` javascript
const page = parseInt(req.query.page, 10) || 1;
```
* `limit`: This parameter specifies the number of movies to return per page. The `limit` parameter defaults to 10. To extract the `limit` query parameter input the following in the `getMoviesCustom` function:
``` javascript
const limit = parseInt(req.query.limit, 10) || 10;
```
We need to calculate the value of the `offset` variable. As explained earlier, the `offset` variable will be passed as the parameter to the `skip` method. It is calculated based on the requested page number and the number of documents per page. To do this, add the following line in the `getMoviesCustom` function:
``` javascript
const offset = (page - 1) * limit;
```
Let’s assume we want `10` movies to be returned per page. Therefore, the `limit` variable will have a value equal to `10`. The value for the `offset` variable will be calculated as follows:
* For the first page, the `page` parameter has a value of `1`. Therefore `offset` will have a value equal to `0`. This means zero documents are skipped at the beginning.
* For the second page, the `page` parameter has a value of `2`. Therefore `offset` will have a value equal to the value of the `limit`, which is `10`. This means the first `10` documents are skipped.
* For the third page, the `page` parameter has a value of `3`. Therefore `offset` will have a value equal to the value of `2*limit`, which is `20`. This means the first `20` documents are skipped.
Similar logic applies to subsequent pages.
To retrieve a subset of movie documents based on the calculated `offset` values and `limit`, add the following line to the `getMoviesCustom` function:
``` javascript
const movies = await Movie.find().skip(offset).limit(limit).exec();
```
In our API response, we also want to return the following pieces of information:
* `totalItems`: The total number of documents in the `Movie` collection. This is done using the `countDocuments` method. In the `getMoviesCustom` function, add the following line;
``` javascript
const totalItems = await Movie.countDocuments({});
```
* `totalPages`: The total number of pages. This is done by dividing the total of documents (`totalItems`), by the number of documents per page (`limit`), and rounding off the nearest whole number. To calculate the total number of pages, in the `getMoviesCustom` function, add the following line:
``` javascript
const totalPages = Math.ceil(totalItems / limit);
```
Putting it all together, the `getMoviesCustom` controller function should look like this:
``` javascript
async function getMoviesCustom(req, res) {
const page = parseInt(req.query.page, 10) || 1;
const limit = parseInt(req.query.limit, 10) || 10;
const offset = (page - 1) * limit;
const movies = await Movie.find().skip(offset).limit(limit).exec();
const totalItems = await Movie.countDocuments({});
const totalPages = Math.ceil(totalItems / limit);
return res.status(200).json({ totalItems, page, totalPages, movies });
}
```
## Using the `mongoose-paginate-v2` Library
In this section, we’ll implement pagination using the `mongoose-paginate-v2` library. An API route has already been created in the boilerplate code, so we’ll focus on the `getMoviesLibrary` controller function.
The `mongoose-paginate-v2` is a pagination library for `Mongoose`. According to the docs:
>The main usage of the plugin is you can alter the return value keys directly in the query itself so that you don't need any extra code for transformation.
To use `mongoose-paginate-v2`, we need to add the plugin to the schema and make use of the model `paginate` method. In the `model/Movie.js` file, make the following adjustments to the schema:
``` javascript
const mongoose = require("mongoose");
const mongoosePaginate = require("mongoose-paginate-v2");
const movieSchema = new mongoose.Schema(
...
);
movieSchema.plugin(mongoosePaginate);
module.exports = mongoose.model("Movie", movieSchema);
```
In the `getMoviesLibrary` controller function in `controllers/movies.js`, input the following code:
``` javascript
function getMoviesLibrary(req, res) {
const { page, limit } = req.query;
const options = {
page: parseInt(page, 10),
limit: parseInt(limit, 10),
const movies = Movie.paginate({}, options).then((result) => {
return res.status(200).json({
totalItems: result.totalDocs,
currentPage: result.page,
totalPages: result.totalPages,
movies: result.docs,
});
});
}
};
```
The Model `paginate` method returns a promise, and has three parameters:
1. `query`: The `query` parameter is an object that states the condition for filtering documents. In our case, since we are returning all records, we pass an empty object `{}`.
2. `options`: The `options` parameter is an object that contains various properties that control how the data is paginated. Some of the object properties include:
* `page`: The current page number. It automatically defaults to `1` if no value is provided.
* `limit`: The number of documents per page. It automatically defaults to `10` if no value is provided.
You can find a list of all the `options` object's properties in the [documentation](https://www.npmjs.com/package/mongoose-paginate-v2).
3. `callback(err, result)`: The parameter is an optional function that gets executed when the pagination results are returned or there is an error in the query.
The Model `paginate` method returns an object after the promise is fulfilled. The properties of the returned object provide information about the paginated result. Some of the properties of the object include:
* `docs`: An array of documents for the specified page that matches the query.
* `totalDocs`: The total number of documents in the collection that match the query.
* `page`: The current page number.
* `totalPages`: The total number of pages based on the total documents and the limit.
Visit the [documentation](https://www.npmjs.com/package/mongoose-paginate-v2) for the full list of the object properties.
The `mongoose-paginate-v2` library provides the helper class `PaginationParameters`. The `PaginationParameters` class enables passing the entire request query parameter to the `paginate` method. This abstraction eliminates the need to declare the parameters individually in the controller function. To use the helper class, replace the content of `getMoviesLibrary` with the following:
``` javascript
function getMoviesLibrary(req, res) {
Movie.paginate(...new PaginationParameters(req).get()).then((result) => {
return res.status(200).json({
totalItems: result.totalDocs,
currentPage: result.page,
totalPages: result.totalPages,
movies: result.docs,
});
});
}
```
## Testing the API
In this section, we’ll use Postman (or any other API client) to test the behavior of the endpoints. The two API endpoints created in the tutorial are:
* `/api/v1/movies/custom`: This endpoint is routed to the `getMoviesCustom` controller, which contains the logic for our basic implementation of pagination.
* `/api/v1/movies/library`: This endpoint is routed to the `getMoviesLibrary` controller, which contains the logic for our implementation of pagination using the `mongoose-paginate-v2` library.
Any request made to both endpoints with the same query parameters should give the same results.
Let’s make the following requests:
1. Make a `GET` request to `/api/v1/movies/custom `and `/api/v1/movies/library`. The `page` and `limit` parameters were not specified, so they should revert to their default values. The `page` parameter would have a value of `1`, the `limit` parameter would have a value of `10`, and a total of `3` pages. The result should look like this:
2. Make a `GET` request to `/api/v1/movies/custom?page=2&limit=4` and `/api/v1/movies/library?page=2&limit=4`. The `limit` parameter has a value of `4` and the `page` parameter has a value of `2`. The request should result in the API endpoint returning `4` documents. The response should indicate that the current page is `2` out of a total of `8` pages. (After populating the database with `MOCK_DATA.json`, there should be a total of `30` records). The result should look like this:
## Conclusion
You now have a basic understanding of how to implement server-side pagination using Express.js and MongoDB. You created two endpoints, one for basic pagination and the other for pagination using the `mongoose-paginate-v2` library.
You can explore additional query features to enhance your application, such as filtering and sorting. For further reading, check out the following resources:
* `mongoose-paginate-v2` [Documentation](https://www.npmjs.com/package/mongoose-paginate-v2).
* [Mongoose Documentation](https://mongoosejs.com/docs/guide.html).
* [MongoDB Documentation](https://www.mongodb.com/docs/).
* [Express.js Documentaion](https://expressjs.com/en/4x/api.html). | michaelikoko |
1,900,903 | Introducing a New Laravel Package DumpTable for Seamless Migrations | Introduction In the dynamic world of web development, managing databases efficiently is... | 0 | 2024-06-26T06:04:07 | https://dev.to/armanrahman/introducing-a-new-laravel-package-dumptable-for-seamless-migrations-51lb | dumptable, laravelpackage, armanrahman, helloarman | ## Introduction
In the dynamic world of web development, managing databases efficiently is crucial. Laravel, one of the most popular PHP frameworks, provides a robust migration system to handle database schema changes. However, updating migrations often means altering entire tables, which can result in data loss in other tables. This challenge can be particularly problematic when valuable data is stored across different tables.
To address this issue, I am excited to introduce my new Laravel package designed specifically for developers. This package allows you to update a single migration file for a specific table without affecting data in other tables, ensuring data integrity across your database.
## Installation
Here’s a practical example to illustrate how to use this package effectively.
**Step 1: Install the Package**
First, install the package via Composer:
```
$ composer require helloarman/dumptable
```
**Step 2: Link Storage Folder**
Need to link storage file:
```
$ php artisan storage:link
```
## Key Features
**1. Targeted Migrations**
Updating a specific migration file without impacting other tables is now possible. With a simple command, you can target a particular table and make the necessary updates.
**2. Seeding Support**
Seeding your database with initial data is a common requirement. This package supports seeding, allowing you to migrate data along with seed files.
```
$ php artisan migrate:dump-table {table_name} --seed
```
or
```
$ php artisan migrate:dump-table {table_name} --s
```
Ensure your seeder files follow the convention: ModelNameSeeder.php.
**3. Magic Restore**
The magic restore feature is a game-changer. It allows you to update a migration file without affecting the existing data in the table. The command stores the current data and only updates the migration columns.
```
$ php artisan migrate:dump-table {table_name} --restore
```
or
```
$ php artisan migrate:dump-table {table_name} --r
```
> Warning: This --restore or -r feature is in beta. Currently, it cannot handle a large amount of data (I tested with 20,000+ entries, and it worked perfectly). Additionally, if this table is used as a foreign key in another table, it may fail. However, don't worry, a backup file will be saved in the storage folder if it fails. Use this feature only during development.
**4. Backup and Restore**
Backing up your data is essential. This package provides a straightforward way to backup any table into an SQL file and restore it when needed.
**Backup Table**
```
$ php artisan table:backup {table_name}
```
**Restore Table**
```
$ php artisan table:restore {table_name}
```
## Example
To update user table with updated migration.
```
php artisan migrate:dump-table users --seed
```
Also update seed file on the table
```
php artisan migrate:dump-table users --seed
```
Without hampering table data update new column.
```
php artisan migrate:dump-table users --restore
```
## Conclusion
Managing migrations in Laravel can be challenging, especially when dealing with large databases and critical data. This package provides a robust solution to update specific migration files without affecting other tables, ensuring data integrity and making the development process smoother.
> Note: This package is designed for developers. While developing, it might help you to work with ease and confidence.
By leveraging the features of this package, you can streamline your database migration workflow and avoid the pitfalls of traditional migration methods. Try it out today and experience seamless migrations in Laravel!
## Share Your Feedback
I hope this package proves to be a valuable tool in your Laravel development toolkit. Your feedback is important to me. Feel free to share your thoughts, suggestions, or any issues you encounter.
Happy coding! 🚀
| armanrahman |
1,900,902 | Tips for Educators: Using Moss Stanford to Promote Academic Integrity in Coding Classes | Worried about students copying code in your programming class? You're not alone! Moss Stanford, a... | 0 | 2024-06-26T06:00:31 | https://dev.to/codequiry/tips-for-educators-using-moss-stanford-to-promote-academic-integrity-in-coding-classes-455m | moss, mossplagiarismchecker, codequiry, codeplagiarism | Worried about students copying code in your programming class? You're not alone! Moss Stanford, a code similarity checker, can be a helpful tool, but it requires a bit of know-how.
Here are some simple tips to make [Moss Stanford](https://codequiry.com/moss/measure-of-software-similarity) your ally in promoting academic integrity:
- **Set Clear Expectations**: Explain what constitutes plagiarism in coding and how Moss Stanford works.
- **Use it Regularly**: Run assignments through Moss Stanford to deter copying and identify potential issues early on.
- **Focus on Learning, Not Catching**: Use Moss Stanford as a way to guide students towards understanding concepts, not just punishment. Encourage them to explain any flagged similarities.
Looking for a user-friendly alternative to Moss Stanford? Check out Codequiry! It offers a similar [Code Similarity Checker](https://codequiry.com/) with a focus on helping students learn from their mistakes. | codequiry |
1,899,806 | Next.js 14: App with OpenAI API Integration | Introduction In today's digital landscape, AI-powered applications are becoming... | 26,489 | 2024-06-26T06:00:00 | https://dev.to/wadizaatour/nextjs-14-app-with-openai-api-integration-293k |
## Introduction
In today's digital landscape, AI-powered applications are becoming increasingly popular. In this tutorial, we'll explore how to build a web application using Next.js and React, while seamlessly integrating the OpenAI API. By the end, you'll have a powerful app that leverages AI capabilities for generating prompts and collecting user information.
## Prerequisites
Before we get started, make sure you have the following prerequisites installed on your machine:
1. **Node.js and npm**: These are essential for building Next.js and React applications. You can download Node.js from the [official website](https://nodejs.org/) or use a package manager like [Homebrew](https://brew.sh/).
2. **OpenAI API key**: Sign up for an API key at [OpenAI's signup page](https://beta.openai.com/signup/). Keep your secret API key private.
## Setting Up the Project
Let's organize our project directory structure:
```
project/
├── src/
│ ├── components/
│ ├── pages/
│ ├── redux/
│ ├── styles/
│ ├── utils/
│ ├── index.js
│ └── store.js
├── public/
├── vercel.json
├── package.json
└── next.config.js
```
This structure follows Next.js conventions, including a `src` directory for source code, a `public` directory for static assets, and configuration files.
## Integrating the OpenAI API
1. Install the `openai` npm package:
```bash
npm install openai
```
2. Create an `openai.js` file in the `src/utils` directory with the following code:
```javascript
import { OpenAI } from 'openai';
const openai = new OpenAI('your-api-key');
async function generatePrompts(engine, prompt) {
const response = await openai.createCompletion({
engine: engine,
prompt: prompt,
max_tokens: 1024,
temperature: 0.5,
});
return response.choices[0].text.trim();
}
```
## Examples
Now, let's create a chatbot or a content generator using the OpenAI API. You can customize the prompts and explore various use cases. For instance, you could build a recommendation engine, an automated email responder, or even a creative writing assistant.
### Example 1: Chatbot
Imagine a chatbot that interacts with users on your website. You can use the OpenAI API to generate responses based on user queries. Here's a simplified example:
```javascript
// Inside your chatbot component
const userQuery = 'Tell me a joke!';
const chatbotResponse = await generatePrompts('davinci', userQuery);
console.log(chatbotResponse); // Outputs a witty joke
```
### Example 2: Content Generation
Suppose you're building a blog platform. You can use the OpenAI API to generate article summaries, headlines, or even entire paragraphs. Here's a snippet:
```javascript
// Inside your blog post creation logic
const articlePrompt = 'Write a summary of the latest tech trends.';
const articleSummary = await generatePrompts('curie', articlePrompt);
console.log(articleSummary); // Outputs a concise summary
```
## Conclusion
Integrating AI into your Next.js app opens up exciting possibilities. Experiment, iterate, and build something remarkable. Whether you're enhancing user experiences, automating tasks, or creating engaging content, AI can be your ally.
Remember, the best way to learn is by building, so keep experimenting and enjoy your journey with Next.js! 🎉
If you have any questions, feel free to ask me!
If you like my post, support me on: [](https://www.buymeacoffee.com/wadizaatour) | wadizaatour | |
1,900,901 | Why single sign-on (SSO) is better | Single sign-on (SSO) is a great way to simplify the authentication model and improve the user... | 0 | 2024-06-26T05:57:49 | https://blog.logto.io/sso-is-better/ | webdev, security, opensource, identity | Single sign-on (SSO) is a great way to simplify the authentication model and improve the user experience for every app. Here's why.
Single sign-on (SSO) is a technology that allows users to authenticate once and access multiple applications. If you only have one application, it may sound like overkill. However, starting with SSO from the beginning can save you a lot of headaches down the road, and implementing SSO is easier than you think.
Before we get started, we need to note that there are two types of SSO:
- The first type is when you have multiple applications that share the same user database. This is the type of SSO we will be discussing in this article.
- The second type is when **your client** has a centralized identity provider (IdP) and you need to integrate with it. This is out of scope for this article.
# Why SSO?
## Simplify the authentication model
The most obvious benefit of SSO is that it simplifies the authentication model. Imagine you start with an online store, the initial authentication model is straightforward:
As your business grows, you decide to add a store management app to allow store owners to manage their stores. Now you have two applications that need to authenticate users.
Here are some choices you have:
**1. You can create a separate user database for the store management app.**
This is the simplest solution, but it means that you need to implement the authentication process for the store management app and users have to create a new account to use the app.
**2. You can use the same user database for both applications.**
This is a better solution because users don't need to create a new account. However, you still need to implement the authentication process for the store management app.
**3. You can use SSO.**
This is the best solution so far. You don't need to implement another authentication process and users don't need to create a new account for the store management app. Furthermore, you can add more applications and sign-in methods without changing the authentication model or user experience.
## Improve user experience
SSO improves the user experience in two ways:
- Users can share the same account across multiple applications.
- Once users sign in in one application, they don't need to sign in again in other applications on the same device.
Some concerns may arise here, but they are all addressable.
**1. How to differentiate applications?**
Single sign-on doesn't mean that we treat all applications the same. In the well-known open standard [OpenID Connect](https://openid.net/developers/how-connect-works/), each application is called a client, and the authentication flows differ depending on the client type. While the end users don't need to know the difference, the client type is important for the authentication server to determine the authentication flow.
**2. What if users don't want to share the same account?**
This is a valid concern, but it's not a problem with SSO. If users don't want to share the same account, they can create a new account for the new application. The key is to give users the option to choose.
**3. What if I need to restrict access to certain applications?**
In fact, SSO is a technique for authentication, while access control is for authorization. SSO can be decoupled from access control. For example, you can use SSO to authenticate users, then use [role-based access control (RBAC)](https://docs.logto.io/docs/recipes/rbac/) to restrict access to certain applications or resources.
To learn more about authentication and authorization, check out [CIAM 101: Authentication, Identity, SSO](https://blog.logto.io/ciam-101-intro-authn-sso/).
**4. SSO requires redirecting users to the authentication server.**
Redirecting is a standard practice for authentication. Considering the user experience, we can leverage multiple techniques to reduce the friction:
- Use refresh tokens to reduce the frequency of authentication.
- Initialize the authentication process with a specific sign-in method, such as Google or Facebook, to reduce the number of clicks.
- Leverage silent authentication to speed up the authentication process.
## Enhance security
**1. A central place for all security-related operations**
SSO allows you to manage all security-related operations in a central place. For example, as we mentioned in the previous section, SSO can still differentiate applications and apply platform-specific authentication flows for each application. Without SSO, you need to implement various authentication flows according to the application type.
In addition, advanced security features such as [multi-factor authentication (MFA)](https://docs.logto.io/docs/recipes/multi-factor-auth/) are easier to implement with SSO without messing up the authentication model.
**2. Reduced attack surface**
In theory, SSO reduces the attack surface because you only need to secure one authentication server instead of multiple applications. The centralized approach also makes it easier to monitor and detect suspicious activities.
**3. Battle-tested standards and protocols**
Open standards and protocols such as [OpenID Connect](https://openid.net/developers/how-connect-works/) and [OAuth 2.0](https://oauth.net/2/) are widely used in the industry and have been battle-tested for years. Both of them match the concept of SSO and are supported by most identity providers (IdPs). By combining these standards with SSO, you can have a secure and reliable authentication system.
# OK, let's implement SSO
Implementing SSO can be big and complicated, there are many things to consider, such as:
- Compliance with standards and protocols
- Authentication flows for different client types
- Multiple sign-in methods
- Security features such as MFA
- User experience
- Access control
Each of these topics can be a separate article and overwhelming. For the sack of simplicity, it's better to start with a managed service that provides SSO out of the box. Our product [Logto](https://logto.io/?ref=dev) is such a service, and it will only take you a few minutes to integrate it into your application.
One of the most common concerns of using a managed service is vendor lock-in. Fortunately, this is not an issue with Logto. Logto is built on top of OpenID Connect and OAuth 2.0, and it's born open-source. We prioritize providing assurance to our customers and aim to empower you with the freedom to choose.
{% cta https://logto.io/?ref=dev %} Try Logto Cloud for free {% endcta %}
| palomino |
1,899,492 | Instant Navigation con Speculation Rules API | Uno de las fantasías de todo frontend es que la navegación entre las diferentes partes de nuestra web... | 0 | 2024-06-26T05:54:45 | https://dev.to/dezkareid/instant-navigation-con-speculation-rules-api-1dnc | webdev, webperf, javascript, frontend | Uno de las fantasías de todo frontend es que la navegación entre las diferentes partes de nuestra web sea instantanea como si de alguna manera la web estuviera lista para la página a la que queremos acceder.
El browser nos ofrece mecanismos como los [resource hints](https://web.dev/learn/performance/resource-hints) para poder hacer precargas (entre los mas conocidos preload y prefetch) de recursos lo cual nos da la posibilidad de reducir tiempos de carga.
Antes de tenía un resource hint llamado prerender pero fue eliminado por múltiples bugs pero ahora regreso en forma de ficha con la [Speculation Rules API](https://developer.mozilla.org/en-US/docs/Web/API/Speculation_Rules_API).
## Speculation Rules API
Antes de empezar, una aclaración preload y prefetch sirven para hacer el request de recursos para que cuando se usen ya se hayan descargado (Hay mas diferencias pero quiero simplificar). Esto en archivos de assets esta perfecto pero cuando se solicitan documentos HTML estos solo se renderizarán cuando ese documento se cargue en el contexto del browser.
Si quisieramos cargar algún recurso preload y prefetch son suficientes, esto normalmente tiene mayor uso en una Single Page App (SPA), en una SPA la navegación es mas compleja porque todo se administra dentro del contexto de la aplicación. Cuando tenemos una Multi Page App (MPA) donde la navegación es simple pero se cambia todo el contexto de la aplicación. Aquí es donde Speculation Rules API nos permite especificar que URLs podemos [prerenderizar](https://developer.chrome.com/docs/web-platform/prerender-pages) para darnos una sensación de inmediates.
### Advertencia
La implementación de Speculation Rules API también tiene consecuencias, al hacer un prerender nuestro JS se ejecuta. Si tenemos analytics podemos estar introduciendo ruido a nuestras métricas ya que estamos "Especulando" ya que nada nos garantiza que el usuario va a acceder a las urls que especificamos.
> Adicionalmente sería bueno considerar el tipo de dispositivo y conexión
### Demo
Cree un sitio sencillo con 3 páginas: index, page2 y page3 (que creativo).
El servidor que cree para servir el contenido hace que cualquier URL que termine en .html tendrá un delay de 2 segundos (Esta parte es opcional y se hizo por motivos dramáticos XD)
```javascript
const express = require("express");
const path = require("path");
const app = express();
const port = process.env.PORT || 9000;
// Define the static files directory
const staticPath = path.join(__dirname, "public");
// Middleware to delay response for HTML files
app.use((req, res, next) => {
if (req.url.endsWith(".html")) {
setTimeout(() => next(), 2000); // Delay by 2 seconds
} else {
next();
}
});
// Serve static files
app.use(express.static(staticPath));
app.listen(port, () => {
console.log(`Server listening on port ${port}`);
});
```
Código Page2
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Page 2</title>
</head>
<body>
<h1>Page 2</h1>
</body>
</html>
```
Código Page3
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Page 3</title>
</head>
<body>
<h1>Page 3</h1>
</body>
</html>
```
Código index.html
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Main</title>
<script type="speculationrules">
{
"prerender": [
{
"urls": ["page2.html"]
}
]
}
</script>
</head>
<body>
<h1>Speculation API</h1>
<h2><a href="page2.html">Page 2</a></h2>
<h2><a href="page3.html">Page 3</a></h2>
</body>
</html>
```
> La Speculation Rules API puede ser usada como un tipo de script o también como un JSON externo pero este debe ser especificado en un Header.
Speculation Rules API no es un API que pueda usarse directamente con JS, funciona como un JSON donde especificas una configuración.
Si usas Chrome, antes de ejecutar el demo te sugiero abrir las developer tools, ve a Application y busca en el panel izquierdo una sección llamada "Speculative loads". Ahí podras ver que la página se cargó (aunque igual podrías usar Network).
Da click en Page 3 y después a Page 2. ¿Ves la diferencia? Ahora si, vamos a explicar al responsable de lo que acaba de suceder.
```html
<script type="speculationrules">
{
"prerender": [
{
"urls": ["page2.html"]
}
]
}
</script>
```
En la [referencia de Speculation Rules API](https://developer.mozilla.org/en-US/docs/Web/API/Speculation_Rules_API) nos especifíca que la configuración es un objeto con 2 propiedades `prerender` y `prefetch`. Por ahora nos enfocaremos en `prerender`.
De acuerdo a la [documentación](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script/type/speculationrules) las reglas que usamos tienen propiedades como urls, un arreglo donde ponemos las URLs que queremos prerenderizar.
> También existe la propiedad where para hacer una selección mas avanzada de aquello que queremos prerenderizar (lo abordaremos en otros posts)
Hay una propiedad llamada [eagerness](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script/type/speculationrules#eagerness) que le indica al browser "cuando" se debería hacer el prefetch/prerender de los recursos especificados en la regla.
Por defecto para lo especificado en "urls", el eagerness tiene un valor de "immediate". Lo que quiere decir que el prerendering comenzará tan pronto como sea posible. Prueba agregando esa propiedad con el valor de "moderate" (no olvides abrir las devtools para ver que sucede)
```html
<script type="speculationrules">
{
"prerender": [
{
"urls": ["page2.html"],
"eagerness": "moderate"
}
]
}
</script>
```
Te dirá que hay una regla que no se ha disparado
Ahora pon el cursor sobre el link y veras como se dispara el evento y hace el prerender. Esto es muy util para evitar prerenders innecesarios.
En futuros post abordaremos mas sobre los diferentes tipos de eagerness. Nota: tu no tienes forma de saber cuando ocurriran estos eventos de manera exacta, eso lo decide el browser.
## Consideraciones
Tu script de analytics y ejecución de ciertos scripts que se deben ejecutar únicamente cuando el usuario visite el documento tendrá que tener código adicional.
Mira el siguiente código rob...inspirado en la documentación de Mozilla
```javascript
if (document.prerendering) {
document.addEventListener("prerenderingchange", initAnalytics, {
once: true,
});
} else {
initAnalytics();
}
```
Si bien el API no puede ser usada directamente con JS, puedes usar JS para agregarlas dinámicamente
```javascript
if (
HTMLScriptElement.supports &&
HTMLScriptElement.supports("speculationrules")
) {
const specScript = document.createElement("script");
specScript.type = "speculationrules";
const specRules = {
prefetch: [
{
source: "list",
urls: ["/next.html"],
},
],
};
specScript.textContent = JSON.stringify(specRules);
document.body.append(specScript);
}
```
Habrá mas post, sobre esta API en el futuro, integraciones con react y como usarla en producción sin preocupaciones aunque esta API sea experimental.
Si les gusta compartan, sino pues también XD. Nos vemos en futuros posts
| dezkareid |
1,900,900 | Benefits of Playing Big Daddy Game | The "Big Daddy Game" is a popular online game that has captured the hearts of many gamers. With its... | 0 | 2024-06-26T05:53:49 | https://dev.to/hfjhjf/benefits-of-playing-big-daddy-game-4fm1 | The "Big Daddy Game" is a popular online game that has captured the hearts of many gamers. With its engaging gameplay, vibrant graphics, and strategic elements, it provides endless hours of entertainment. This game is designed for players of all skill levels, making it accessible and enjoyable for everyone. In this article, we will explore various aspects of the Big Daddy Game, offering tips and insights to help you master it and have more fun.
Understanding Big Daddy Game Basics
The Big Daddy Game is an online multiplayer game where players navigate through different levels, each filled with unique challenges. The main objective is to complete missions, collect rewards, and progress through the game. Players can choose from various characters, each with special abilities that can help overcome obstacles.
To start playing, you need to create an account on the [Big Daddy Game](https://ilm.iou.edu.gm/members/bigdaddygame/) website or app. Once registered, you can select a character that suits your playing style. The game offers a tutorial mode for beginners, which is highly recommended to understand the basic controls and objectives. After completing the tutorial, you can dive into the game and begin your adventure.
Tips for Winning Big Daddy Game
Winning the Big Daddy Game requires a combination of strategy, skill, and patience. Here are some tips to help you succeed:
Understand the Game Mechanics: Spend time learning how the game works. Understand the rules, objectives, and how different items and power-ups can be used to your advantage.
Practice Regularly: Like any other game, practice makes perfect. The more you play, the better you will become. Regular practice helps you improve your skills and become familiar with different game scenarios.
Use Power-Ups Wisely: Power-ups can give you an edge in the game, but use them wisely. Save them for the more challenging levels where you need an extra boost.
Stay Focused: Concentration is key to success in the Big Daddy Game. Stay focused on the game and avoid distractions. This will help you make quick decisions and react to changes in the game.
Learn from Others: Watch videos and read guides from experienced players. You can learn new strategies and tips that can help you improve your gameplay.
Common Mistakes to Avoid in Big Daddy Game
Even experienced players can make mistakes. Here are some common pitfalls to watch out for:
Skipping the Tutorial: The tutorial is designed to help you understand the basics of the game. Skipping it can leave you confused and at a disadvantage.
Overusing Power-Ups: While power-ups are helpful, using them too often can leave you without resources when you really need them. Use them sparingly.
Not Practicing Enough: Regular practice is crucial for success. If you don’t play often, you might struggle with difficult levels. Set aside time each day to play and improve your skills.
Playing Alone: Some game modes require teamwork. Playing alone can limit your progress. Join teams or play with friends to achieve better results.
Getting Frustrated: It’s easy to get frustrated when you’re stuck on a difficult level. Stay calm and patient. Take breaks if needed and come back with a fresh mind.
Benefits of Playing Big Daddy Game
Playing the Big Daddy Game offers more than just entertainment. Here are some benefits:
Improves Cognitive Skills: The game requires strategic thinking and problem-solving, which can enhance your cognitive abilities.
Boosts Social Interaction: Many game modes encourage teamwork and communication, helping you build social skills and make new friends.
Relieves Stress: Engaging in a fun and immersive game can be a great way to relax and unwind after a long day.
Enhances Hand-Eye Coordination: The game’s fast-paced nature requires precise movements, which can improve your hand-eye coordination.
Provides a Sense of Achievement: Completing challenges and earning rewards can give you a sense of accomplishment and satisfaction.
Future of Big Daddy Game
The future of the Big Daddy Game looks bright with continuous updates and new features being added regularly. Here are some things to look forward to:
New Game Modes: Expect new and innovative game modes that offer fresh challenges and experiences.
Improved Graphics: With advancements in technology, the game’s graphics will become even more realistic and immersive.
More Characters and Items: New characters, power-ups, and items will be introduced, giving players more options and strategies.
Expanded Community: The game’s community is growing, with players from around the world. This means more competitions, events, and opportunities to connect with other gamers.
Enhanced User Experience: Developers are focused on making the game more user-friendly, with better interfaces and smoother gameplay.
Conclusion
The Big Daddy Game is a thrilling and engaging online game that offers hours of entertainment. By understanding the game, practicing regularly, and avoiding common mistakes, you can improve your skills and enjoy the game even more. The benefits of playing extend beyond just fun, offering cognitive, social, and psychological advantages. With continuous updates and a growing community, the future of the Big Daddy Game is promising and exciting.
Questions and Answers
Q1: How can I start playing the Big Daddy Game?
A1: To start playing, create an account on the Big Daddy Game website or download the app. Follow the tutorial to learn the basics and start playing.
Q2: What are some effective strategies for winning the Big Daddy Game?
A2: Effective strategies include understanding the game mechanics, practicing regularly, using power-ups wisely, staying focused, and learning from experienced players. | hfjhjf | |
1,900,899 | Integrating a VS Code Like Editor in NextJS | Code Snippet Sharing App Series | Welcome back to our Code Snippet Sharing App series! In this video, we take a significant step... | 27,859 | 2024-06-26T05:53:16 | https://dev.to/gkhan205/integrating-a-vs-code-like-editor-in-nextjs-code-snippet-sharing-app-series-5fnc | nextjs, webdev, javascript, beginners | Welcome back to our Code Snippet Sharing App series! In this video, we take a significant step forward by integrating a VS Code-like editor into our NextJS application. This powerful feature will greatly enhance the user experience, allowing for seamless code writing and editing within our app.
In this video, you'll learn:
- How to integrate a robust code editor in NextJS that feels just like VS Code
- Creating a reusable wrapper component around the editor for use in multiple parts of the app
- Adding a supported languages dropdown to select different programming languages
By the end of this tutorial, you'll have a versatile code editor embedded in your app, complete with multi-language support and reusability. This will make our Code Snippet Sharing App more dynamic and user-friendly.
{%youtube P1nKORXfJcU %}
If you haven't already, make sure to check out the previous videos in this series where we set up authentication with NextAuth v5, Prisma, and MongoDB. Stay tuned for more exciting features coming up in this series!
Authentication with NextAuth v5:
{%youtube t4x8EOoczPs %}
Full Playlist: https://www.youtube.com/watch?v=vjFLoXvcIOk&list=PLtUG3cTN2la1V5wV1nz1LnZ6lf8ECsBE1
Don't forget to like, comment, and subscribe for more updates. Hit the notification bell so you never miss a new video in this series!
-----------------------------------------------------
Blog: www.ghazikhan.in/blog
Twitter: https://twitter.com/codewithghazi
Instagram: https://www.instagram.com/codewithghazi/
LinkedIn: https://www.linkedin.com/in/ghazi-khan/ | gkhan205 |
1,900,898 | Unlocking the Potential of P2P Crypto Exchange Development | In the rapidly evolving world of cryptocurrencies, P2P (Peer-to-Peer) crypto exchanges have emerged... | 0 | 2024-06-26T05:53:09 | https://dev.to/kala12/unlocking-the-potential-of-p2p-crypto-exchange-development-3h46 | In the rapidly evolving world of cryptocurrencies, P2P (Peer-to-Peer) crypto exchanges have emerged as a revolutionary way to trade digital assets. Unlike traditional exchanges, P2P platforms connect buyers and sellers directly, facilitating transactions without intermediaries. This article explores the potential for the development of P2P crypto exchanges and outlines ten key points that highlight its importance and benefits.
**Improved Privacy and Security
**P2P exchanges prioritize user privacy, eliminating the need for intervention from a central authority. Transactions occur directly between parties, which reduces the risk of data breaches and hacking associated with centralized data exchange. This decentralized nature ensures the security of personal data and assets.
**Lower transaction fees
**Traditional crypto exchanges often charge high fees for transactions, deposits and withdrawals. On the other hand, P2P exchanges usually have lower fees because there are no middlemen to take a cut. This cost efficiency makes P2P platforms attractive especially for frequent traders and traders with smaller amounts.
**Global Accessibility
**P2P crypto exchanges allow users around the world to trade without restrictions. These platforms support a wide range of payment methods and currencies, enabling seamless cross-border transactions. This global reach opens up opportunities for users in areas where access to traditional banking services is limited.
**Censorship Resistance
**In some countries, government regulations and banking restrictions can make cryptocurrency trading difficult. P2P hubs offer a solution by operating in a decentralized network, making it harder for authorities to shut down. This censorship resistance ensures that users can trade freely regardless of local regulations.
**Faster Transactions
**P2P exchanges facilitate faster transactions by connecting buyers and sellers directly. Without third-party approval, transactions can be completed in minutes. This speed is particularly useful during periods of high market volatility, when fast transaction execution is critical.
**User Control
**P2P platforms give users complete control over their finances and transactions. Unlike centralized exchanges, where users must trust the platform to manage their funds, P2P exchanges allow users to maintain ownership of their cryptocurrencies throughout the trading process. This increased control reduces the risk of losses due to stock market defaults or mismanagement.
**Different trading options
**P2P exchanges offer different trading options, including different cryptocurrencies and fiat currencies. This diversity allows users to trade in pairs, which is usually not available on centralized exchanges. In addition, P2P platforms often support unique payment methods that serve a wider audience with different preferences.
**Community Trust and Reputation
**One of the characteristics of P2P exchange is the reputation system. Users can rate and review their business partners based on past transactions, creating a community based on trust. This system encourages honest behavior and helps users identify trustworthy traders, which promotes a safer trading environment.
**Innovation and Flexibility
**P2P crypto exchanges are at the forefront of innovation in the blockchain space. They often adopt new technologies and features faster than their centralized counterparts. The flexibility of these platforms allows them to quickly adapt to market changes and user needs, ensuring an excellent trading experience.
**Increasing Financial Inclusion
**P2P exchanges promote financial inclusion by providing access to financial services to both unbanked and underbanked populations. People without access to traditional banking systems can participate in the global economy, trade cryptocurrencies and create their own financial futures through these platforms.
**Conclusion
**The development of P2P crypto exchanges opens up new opportunities in the world of digital assets. With improved privacy, lower fees, global accessibility and user empowerment, these platforms are changing the way cryptocurrencies are traded. By promoting innovation and community trust, P2P exchanges will play a critical role in the future of finance. As the crypto world continues to evolve, the potential of P2P exchanges will undoubtedly.
 | kala12 | |
423,797 | Road to Vim Mastery Day 2 | this post is continuation to road to mastery day 1. if you are vim beginner like me, i recommend you... | 0 | 2020-08-10T14:40:57 | https://dev.to/cosmospilot/road-to-vim-mastery-day-2-3ai4 | vim, codenewbie | *this post is continuation to [road to mastery day 1](https://dev.to/justcallmezed/road-to-vim-mastery-day-1-39d8).*
if you are vim beginner like me, i recommend you to go practice at VimGenius website daily.
In the previous post we discussed about basic commands and navigational keys in vim.
In this post we will discuss about deletion commands.
####dw####
used to delete a word
Instructions to use **dw** command:
1. press **ESC** to make sure you enter normal mode.
2. use j(down) | h(left) | k(up)| l(right) to move cursor to the starting letter of the word that you want to delete.
3. press dw to delete the word
> when you press `d` you will able see `d` in the bottom right corner of your vim window which means vim is waiting for you to enter w to proceed further, if not press **ESC** to start again.
**Example**
suppose cursor is at letter a in apple
"apple makes you strong"
`dw`
"makes you strong"
now cursor is at letter m in makes.
>note that the space between apple and makes is also deleted.
####de####
used to delete from cursor to the end of the word
**Example**
cursor at a in apple
"apple makes you strong"
`de`
" makes you strong"
now cursor is at space before word makes.
>note that space before makes is not deleted
####d$####
used to delete from cursor to the end of the line
**Example**
cursor at e in apple
"apple makes you strong"
`d$`
"appl"
> If you observe the commands we have used up to now, you can notice that in every delete command `d` stays static and successive letter or symbol changes. So let's look at some theory.
####dd####
used to delete whole line
**Example**
cursor at v in violets.
"
roses are red.
violets are blue.
"
`dd`
"
roses are red.
"
###operators and motion###
syntax : d _
d - delete operator
_ - motion is something operator will operate on like e,$,w,d
In the next post we will see how to use count or numbers to move cursor and delete multiple lines
Well that's it for day 2
*Zed*
| cosmospilot |
1,900,862 | Retrieve satellite earth observation images easily with QGIS JAXA Earth API Plugin | Abstract Climate is changing rapidly, and these changes must be monitored continuously,... | 0 | 2024-06-26T05:52:58 | https://dev.to/mierune/retrieve-satellite-earth-observation-images-easily-with-qgis-jaxa-earth-api-plugin-1e7j | qgis, satellite, climatechange, foss4g | ## Abstract
Climate is changing rapidly, and these changes must be monitored continuously, especially with satellite observations.
The Japan Aerospace Exploration Agency (JAXA) publishes Earth observation images, such as temperature, precipitation amount, vegetation, etc., which can be retrieved using the JAXA Earth API.
This post describes how to retrieve georeferenced observation images using the JAXA Earth API plugin for QGIS.
## JAXA Earth API overview
JAXA Earth API is a satellite data distribution service, written in Python and javascript.
Description and available dataset are detailed in the official website : https://data.earth.jaxa.jp/
Observation images can be retrieved easily, but it would be better to overlay onto a basemap, that is why the use of a Geographic Information System (GIS) such as QGIS may be useful.
## The use of QGIS JAXA Earth API Plugin
QGIS is an Opensource GIS software, and we can gather and analyse geographic data easily.
QGIS is also customizable using python scripts or adding plugins on.
Here is a procedure to install QGIS JAXA Earth API Plugin and retrieve satellite data.
### 1. On QGIS and add OpenStreetMap basemap
- Open QGIS
Basemap should be used as background to show map context.
It can be added on QGIS as XYZ tile.
- On browser, right click on XYZ tiles
- New connection…
- Put a name to this connection and input `https://tile.openstreetmap.org/{z}/{x}/{y}.png` link as URL
- OK
OpenStreetMap should be displayed on map canvas.
### 2. Install JAXA Earth API Plugin
- Menu -> Plugins -> Manage plugins...
- On plugin manager, search for `JAXA` and install
Once plugin installed, JAXA Earth API icon should appear on tool bar
- By clicking on plugin icon, plugin dialog should appear
### 3. Plugin use example
- 1. Choose target dataset (here precipitation rate monthly)
- 2. Choose target period
- 3. Choose target map extent
- By clicking on `Map Canvas Extent` button, map current is set
- Custom extent can also be set by clicking on `Draw on Canvas` button
- 4. Push `Launch` button to load data
Dataset is loaded as one layer per month!
## At last
- Regarding results, precipitation rate evolution can be checked monthly.
- Animation of this evolution can be made using [TimeManager](https://plugins.qgis.org/plugins/timemanager/) plugin
- If you see any bug or have an enhancement idea, feel free to put an issue here :
https://github.com/MIERUNE/qgis-jaxa-earth-plugin | bordoray |
1,900,897 | What Role Do Freight Forwarders Play In Shipment Registration? | In shipment registration, the freight forwarders are responsible for ensuring that the shipment takes... | 0 | 2024-06-26T05:52:37 | https://dev.to/prasanth_m_dcc6e8ac627c42/what-role-do-freight-forwarders-play-in-shipment-registration-3ac1 | productivity, career, discuss, news | In shipment registration, the freight forwarders are responsible for ensuring that the shipment takes place from one destination to another. Their warehousing, certification, and customs law skills position them as important allies for exporters. This article discusses different aspects of the participation of freight forwarders in shipment registration, proving their indispensability to contemporary logistics.
#### Consulting On Documentation And Regulations
A major responsibility of freight forwarders is to help the exporters navigate through the legal papers and bureaucratic hurdles. International shipping requires a lot of documentation, licenses, and permits, and each one of them comes with specific procedures. They also offer valuable information to the exporter regarding what is required by the law and customs.
## Ensuring Compliance
It is very important to adhere to the exportation and importation laws. Every mistake is costly; it can lead to delays, fines, or even loss of the goods themselves. Freight forwarders assist exporters with these requirements so that one does not fall prey to compliance hazards. This is because they must have a good understanding of the global trade legal provisions of the shipping business.
## Preparing and Submitting Documentation
Documentation is an important factor in the shipment registration process. This involves the preparation of necessary documents for transportation and forwarding, which has to be accurate and comprehensive.
## Essential Documents
Commercial Invoices: It deals with the transactions between the exporter and the importer.
**Packing Lists:** These show what each package will contain.
**Customs Forms:** These are essential in the processing of the customs.
**Bills of Lading:** These act as an acknowledgment of the receipt of the shipment and also as a legal document between the shipper and the carrier.
These documents should have all the information that is required and the paperwork should be in line with the requirements of the importing country because the [shipment registration differs between countries](https://logistics-software.hashnode.dev/how-does-shipment-registration-differ-between-countries-and-why).
## Submission to Authorities
After the documents have been prepared, freight forwarders tender them to the competent authorities on behalf of the exporter. It helps in the legal and regulatory passing of the shipment, which enables it to continue its journey without hitches.
## Handling Customs Clearance
Customs Clearance is an essential point of shipment, and forwarding companies contribute immensely to this process.
## Representation During Customs Clearance
Freight forwarders act on behalf of the exporter when it comes to dealing with customs authorities. They are involved in the payment of duties and taxes, thus ensuring that the correct figures have been computed. Such representation makes the work easier for the exporters who may have little knowledge of the customs formalities.
## Working with Customs Brokers
Freight forwarders usually work in conjunction with customs brokers to facilitate the proper entry of goods. These brokers focus on the rules of customs and can help to speed up customs formalities. Together, they make sure that the goods are properly valued, the documents are correctly filed, and all customs regulations are followed.
## Arranging Transportation and Logistics
Besides documents and customs, freight forwarders are involved in the physical transportation of consignments.
## Booking Cargo Space
Freight forwarders purchase cargo capacity from carriers; they choose the right means of transport, be it by air, water, rail, or road. This factor makes it easier for them to determine the most appropriate and affordable networks to use in making the deliveries on time.
## Coordinating International Shipping
Transporting goods across borders requires careful planning, including dealing with several carriers, transshipment, and possible delays. Freight forwarders are particularly proficient in this facet, guaranteeing the efficient passage of consignments through all the phases of their transit.
## Providing Warehousing and Insurance
Some of the extra services that freight forwarders may include warehousing and insurance for the shipment process.
## Warehousing and Distribution
Freight forwarders can be contracted to handle the packaging and storage of cargo before shipment and delivery of the products after shipment. This service is especially important for exporters who require short-term warehousing facilities or those whose products are shipped to several locations.
## Cargo Insurance
As an assurance to safeguard the cargo against any losses, the freight forwarders offer cargo insurance. In this capacity, they ensure their clients procure insurance that would protect the shipment from perils including damage, theft, or loss during transit.
## Conclusion
Freight forwarders are a valuable asset when it comes to the [registration of shipments](https://www.fosdesk.com/shipment-registration/). Their knowledge of documentation, compliance, customs formalities, shipment, and value-added services is advantageous in making the total procedure less complicated, legal, and cheaper for the exporters. To sum up, cooperation with experienced and trustworthy forwarders allows businesses to avoid potential problems regarding the international transportation of their products and provide their customers with efficient delivery of purchases.
| prasanth_m_dcc6e8ac627c42 |
1,900,896 | In Excel, Re-arrange A Sequence N Times Randomly | Problem description & analysis: Column A is a random sequence. Cell B2 contains the parameter... | 0 | 2024-06-26T05:52:14 | https://dev.to/judith677/in-excel-re-arrange-a-sequence-n-times-randomly-3g0d | tutorial, productivity, beginners, programming | **Problem description & analysis**:
Column A is a random sequence. Cell B2 contains the parameter that represents the number of times of re-arranging members of the sequence.
We need to rearrange column A N times.
**Solution**:
Use **SPL XLL** to enter the formula below:
```
=spl("=?2.conj(?1.sort(rand()))",A2:A5,B2)
```
As shown in the picture below:
**Explanation**:
"integer.()" represents looping N times. conj() function concatenates multiple sequences. sort(rand())sorts a sequence randomly. | judith677 |
1,900,895 | GBase 8a Implementation Guide: Performance Optimization | 1. Hardware Configuration Recommendations CPU Ensure the BIOS settings are in... | 0 | 2024-06-26T05:50:30 | https://dev.to/congcong/gbase-8a-implementation-guide-performance-optimization-1flj | database | ## 1. Hardware Configuration Recommendations
### CPU
Ensure the BIOS settings are in non-power-saving mode to prevent the CPU from throttling. For servers using Intel CPUs that are not deployed in a multi-instance environment, it is recommended to disable the `vm.zone_reclaim_mode` parameter. To disable the NUMA parameter:
- A. Modify the current system value: `echo 0 > /proc/sys/vm/zone_reclaim_mode`
- B. Modify or add to the configuration file `/etc/sysctl.conf`: `vm.zone_reclaim_mode = 0`
### Memory
Configure the memory usage with the PCT parameter (`gbase_memory_pct_target`), which determines the percentage of the OS memory the `gbased` process can use. After disabling swap, reserve 20% for other programs. Configure the data heap, operator heap, and TEMP heap sizes as needed.
### SWAP
For servers with small memory, configure SWAP as twice the physical memory. For servers with large memory, configure SWAP size between 64GB and 128GB.
### Network
Use a 10 Gigabit network and pre-test the bandwidth between nodes.
### Hard Disk
Calculate disk I/O and test disk performance based on the number of hard disk blocks and RAID method. For multi-instance deployment, if there are enough disk blocks, consider using different disks for each instance (currently requires manual mapping).
## 2. Operating System Configuration Recommendations
### 2.1. OS Parameter Adjustment Recommendations
GBase 8a Cluster will automatically adjust required OS parameters during installation. Version 8.6 does this via the `InstallTar.py` program, while version 9.5 requires running `SetSysEnv.py` before installation. If you need to modify or configure OS parameters, contact a GBase engineer or refer to the product manual. During the operation of the GBase 8a cluster, if parameters are modified, refer to the product manual for adjustments.
In some OS versions (e.g., RedHat 6.7), modifying the open file limit requires changes not only to `limits.conf` but also to the `/etc/security/limits.d/90-nproc.conf` file. Add the following to `90-nproc.conf`: `* soft nproc 655360`.
### 2.2. Disk Scheduling Strategy Recommendations
Since databases are I/O-intensive, it is recommended to set the disk I/O scheduling strategy for data storage on GBase cluster nodes as follows:
- For mechanical disks, use the `deadline` scheduling strategy. Modify the disk I/O scheduling strategy with:
`echo deadline > /sys/block/$data_disk/queue/scheduler`
- This change is for the current system configuration and needs to be reset after a system reboot. Alternatively,
modify the `/etc/default/grub` file, find the `GRUB_CMDLINE_LINUX` line, add `elevator=deadline transparent_hugepage=never` within the quotes, then run as root:
`grub2-mkconfig -o /boot/grub2/grub.cfg`
This change is permanent, affecting the global setting at OS startup.
**Note:** For mechanical disks, the CentOS/RedHat 8.0 series uses `mq_deadline`. For SSDs, use the `noop` scheduling strategy.
### 2.3. Cache Parameter Settings Recommendations
Set the OS to prefer reclaiming cache to avoid poor memory allocation performance when the cache is full:
- Method 1:
```
echo 1024 > /proc/sys/vm/vfs_cache_pressure
echo 8388608 > /proc/sys/vm/min_free_kbytes
```
- Method 2: Edit the `/etc/sysctl.conf` configuration file:
```
vm.vfs_cache_pressure = 1024
vm.min_free_kbytes = 8388608
```
The `/proc/sys/vm/min_free_kbytes` file specifies the minimum free memory (in KB) Linux VM should retain. The size should be set to 1/12 of the physical memory. The above setting is for a server with 96GB memory, setting the value to 8GB.
### 2.4. Transparent Huge Page Management Settings Recommendations
GBase databases are not optimized for transparent huge page management, so disable this feature. As root, modify the `/sys/kernel/mm/transparent_hugepage/enabled` file with:
`echo never > /sys/kernel/mm/transparent_hugepage/enabled`
### 2.5. Maximum Task Number Limit Recommendations
For RedHat7, Suse11, and later OS versions, modify the `DefaultTasksMax` parameter in the `/etc/systemd/system.conf` file to:
`DefaultTasksMax=infinity`
### 2.6. File System Cache Settings Recommendations
By default, Linux can use up to 40% of available memory for file system cache. When this threshold is exceeded, the file system writes all cached content to disk, causing subsequent I/O requests to be synchronous. This can affect I/O system responsiveness and cause memory to be fully occupied, making the system unresponsive. Adjust file system cache parameters to alleviate SQL task blocking based on application requirements:
For `vm.dirty_ratio` and `vm.dirty_background_ratio`, adjust the parameters as needed. For example:
Recommended settings:
```
sysctl -w vm.dirty_ratio=10
sysctl -w vm.dirty_background_ratio=5
sysctl -p
```
To make these changes permanent, modify the /etc/sysctl.conf file by adding:
```
vm.dirty_background_ratio = 5
vm.dirty_ratio = 10
```
## 3. Data Distribution Planning
The performance of the GBase 8a MPP cluster depends on the overall performance of each node. The data volume stored on each node significantly impacts cluster performance. To achieve optimal performance, all data nodes should store an equal amount of data. During the database table planning and definition phase, consider whether the table is a replication table or a distribution table, and set some columns on the distribution table as distribution columns for hash distribution.
For example, based on the data distribution characteristics, you can:
- Store dictionary tables or dimension tables as replication tables across nodes, without sharding the data. Although this causes data redundancy, it allows local JOIN operations with fact tables, avoiding data movement between nodes.
- Distribute fact tables (large tables) across different nodes using methods such as random distribution (rarely used), single-column hash distribution, or multi-column hash distribution. When SQL query conditions are met by only some nodes, the query optimizer can decide to execute SQL only on those nodes.
### 3.1. Distribution Column Selection Principles
- Prioritize JOINs between large tables, making the columns used in JOIN conditions hash distribution columns to enable distributed execution of JOIN operations across nodes.
- Consider `GROUP BY`, making the `GROUP BY` columns hash distribution columns for one-step aggregation.
- Choose columns with a high number of unique values (high `count(distinct)`) as hash distribution columns to ensure even data distribution.
- Frequently used columns in equality queries should be considered as hash distribution columns.
### 3.2. Notes
- Hash distribution columns should be numeric or string types.
- Columns used as hash distribution columns should not be updated (including fast update mode).
- Ensure hash join equality columns have identical type definitions to avoid issues. For example, joins between `char` and `varchar` types can yield empty results due to padding differences, and joins between `decimal` and `bigint` types require type conversion, preventing optimal execution plans. Use the same type, such as `bigint`, for hash distribution columns.
## 4. Data Sorting Optimization
Sorting data by a query column groups similar values in limited data blocks, reducing I/O and improving compression. This enhances the filtering effect of smart indexes, significantly boosting overall query performance. When possible, sort data by frequently used query columns.
For example, in the telecommunications industry, queries often use phone numbers. Sorting data by phone numbers within a specific time range allows smart indexes to enhance query performance.
## 5. Compression Strategy Selection
In most applications, the performance bottleneck is disk I/O, so modern database designs aim to reduce disk I/O. Compression reduces I/O time and improves performance, and 8a is no exception. Compression is a key technology for performance enhancement. The 8a parallel executor can handle decompression through upper-level parallel scheduling, significantly improving the suitability of decompression. In many scenarios, especially those involving large data volumes, using compressed data can provide better performance than uncompressed data.
### 5.1. Compression Methods
**Version 86:**
```
gbase_compression_num_method=<num_method>
gbase_compression_str_method=<str_method>
```
Table-level compression: COMPRESS(<num_method>,<str_method>)
Column-level int compression options: 0, 1, 5
Column-level varchar compression options: 0, 3, 5
Table-level combined compression: 00, 13, 55
**Version 95:**
```
gbase_compress_method=< 'method' >
gbase_compress_level=<level>
```
Table-level compression: COMPRESS(< 'method' >,<level>)
`method` specifies the compression algorithm, with possible values as follows (case insensitive):
- No zip: No compression
- High z: High compression ratio
- Rapid z: Fast compression
- New Rapid z:
- STDZ:
`level` specifies the compression level, ranging from 0 to 9, where 1 offers the lowest compression ratio and the fastest speed, and 9 offers the highest compression ratio and the slowest
Compatibility Mapping between **Version 86 and Version 95**
The compression algorithms in version 95 are compatible with the usage of version 86. When both `gbase_compression_num_method` and `gbase_compression_str_method` parameters coexist with `gbase_compress_method` and `gbase_compress_level` parameters, the latter takes precedence. The mapping is as follows:
|New Compression Algorithm|Old Compression Algorithm|
|----------------|-------------------|
|gbase_compress_method=’NoZip ’ gbase_compress_level=0|gbase_compression_str_method=0 <br> gbase_compression_num_method=0|
|gbase_compress_method=’RapidZ ’ gbase_compress_level=0|gbase_compression_str_method=5 <br> gbase_compression_num_method=5|
|New Compression Algorithm|Old Compression Algorithm|
|----------------|-------------------|
gbase_compress_method=’HighZ ’ gbase_compress_level=0|gbase_compression_str_method=3 <br> gbase_compression_num_method=1|
|COMPRESS(’NoZip’,0)|COMPRESS(0,0)|
|COMPRESS(’RapidZ’,0)|COMPRESS(5,5)|
|COMPRESS(’HighZ’,0)|COMPRESS(1,3)|
### 5.2. Selection Principles
The advantage of 31 compression is its high compression ratio, which is twice as high as 55 compression. However, its execution efficiency is average. If storage space is a priority and performance is not, 31 compression is recommended. Conversely, if storage space is not a concern and performance is critical, 55 compression is advisable.
### 6. Hash Index Selection
Hash Index can typically improve the efficiency of locating equality queries, especially in applications focused on precise single-table queries. For instance, in telecom services for concurrent call detail records queries (especially when sufficient memory is available).
In 8a, hash indexes are divided into Global Hash and Segment Hash, mainly differing in the scope of the column on which the hash index is created.
A Global hash index is created on the entire column data, whereas a segment hash index divides the entire column data into segments based on the specified dc number (`key_DC_size`) and creates an index on each segment. Segment hash indexes are recommended for easier space recovery when disk space is limited. In practice, Global Hash Index is more commonly used.
Example syntax for segment hash index:
```
CREATE INDEX idx_t_a ON t(a) key_DC_size = 1000 USING HASH GLOBAL;
```
Recommendation: The number of Dcs (key_DC_size) for segment hash indexes should be comparable to the number of dc hits in a single query scan, usually between 400 and 2000.
In 8a, the implementation of SQL for deleting data involves marking the data for deletion, with the data itself still existing on the disk. In fast update mode, an update SQL first deletes the original data row and then inserts a new row. For marked-for-deletion data on the disk, 8a provides the `shrink space` SQL for manual removal, effectively freeing disk space. The `shrink space` statement performs block-level and row-level recovery, simultaneously recovering index files. This approach significantly improves database management performance in large data analysis databases.
Example of block-level recovery with `shrink space`:
```
ALTER TABLE t SHRINK SPACE FULL block_reuse_ratio=30;
```
This consolidates and recovers DC space where the valid data proportion is less than 30%, thoroughly clearing invalid data with deletion marks, and re-saving the DCs. Index files are also recovered and rebuilt as needed.
In practice, GBase 8a first filters using intelligent indexes, and then uses Hash Index if an equality query condition column has a Hash Index, otherwise, it performs a full DC scan. This behavior is evident in the Trace Log.
For real-time data loading scenarios, set a time window to load data into temporary tables without indexes, then insert this data into indexed target tables or create indexes on the temporary tables. This one-time index processing significantly reduces the maintenance costs associated with indexes.
#### Notes
- Indexes are a lossy optimization method, potentially impacting data loading and DML operation performance. Use based on specific needs.
- Columns chosen for hash indexes should have few duplicate values to avoid severe hash collisions affecting performance.
- Binary type columns are unsuitable for HASH indexes.
- Only single columns can be specified when creating indexes; multi-column composite indexes are not allowed.
## 7. Kafka Consumer Tuning
### 7.1. Kafka Design
Using Kafka consumer for incremental data synchronization is suitable for scenarios where the data source is a transactional database (e.g., Oracle, MySQL). It offers more convenience compared to batch loading.
Kafka consumer pulls messages from Kafka, parses operation types, table names, primary key names, column names, and data from the messages, and temporarily stores them in a local queue as intermediate results. Transaction threads retrieve data from the local queue, merge and batch them, and send DML statements to gnode for execution and final submission.
Kafka consumer primarily enhances performance through merging and batching. Merging involves resolving delete and insert operations in memory, which is a prerequisite for batching. Batching refers to submitting as much data as possible in a single transaction to leverage GBase8a's high throughput.
### 7.2. Factors Affecting Performance
Several factors affect the performance of consumer data synchronization, listed in order of severity:
- Frequent delete and update operations on large tables (with billions of rows) in the source database. These operations remain slow in gnode even after merging and batching by the consumer.
- A large number of tables. If tens of thousands of tables synchronize data through the consumer, the batching effect of the consumer is severely reduced.
- A large number of columns in tables. Since 8a is a column-store database, the number of columns is linearly related to disk access times, leading to a linear decrease in performance.
- Concurrent user operations. During consumer data synchronization, numerous user operations on GBase8a compete for resources with the consumer. | congcong |
1,899,999 | Type vs Interface | In TypeScript development, choosing between type and interface can be confusing. Both are essential... | 27,852 | 2024-06-26T05:34:26 | https://dev.to/023prashantsharma/type-vs-interface-41a0 | typescript, beginners, webdev | In TypeScript development, choosing between type and interface can be confusing. Both are essential for defining object shapes and types, but knowing when to use each can be tricky.
Developers often wonder: When should I use `type` instead of `interface`?
How can I extend existing types? What about defining complex types, unions, or tuples? This blog will clarify these concepts, providing guidelines and examples to help you choose the right tool for your TypeScript projects, ensuring cleaner and more efficient code.
- 1. Basic Type and Interface Declarations.
**Type**
```typescript
type User = {
name: string;
email: string;
};
// Notation Suggestion:
// Use TUser for type declarations.
```
**Interface**
```typescript
interface User {
name: string;
email: string;
};
// Notation Suggestion:
// Use IUser for interface declarations.
```
- 2. Extending Types and Interfaces.
To extend a type in TypeScript, you use an intersection (&) to combine it with additional properties. For interfaces, you use the extends keyword to inherit properties from another interface.
```typescript
type User = {
name: string;
email: string;
};
type SuperUser = User & {
roleAccess: string;
};
```
```typescript
interface User {
name: string;
email: string;
};
interface SuperUser extends User {
roleAccess: string;
};
```
### Reasons to Prefer type Over interface.
**1. Type Aliases Can Define Non-Object Types.**
- Type aliases are more versatile as they can define primitives, union types, and other non-object types.
```typescript
type Status = 'Success' | 'Error' | 'Warning';
let status: Status = 'Success';
```
- This is invalid with interfaces:
```typescript
interface Status = 'Success' | 'Error' | 'Warning'; // Invalid
```
- Workaround with interfaces, but less intuitive:
```typescript
interface Response {
Status: 'Success' | 'Error' | 'Warning';
}
const response: Response = {
Status: 'Success'
};
```
**2. Union Types**
- You cannot create union types with interfaces.
```typescript
type Status = string | string[];
const status: Status = ['Success', 'Error'];
```
- Invalid with interfaces
```typescript
interface Status = string | string[]; // Invalid
```
**3. Omitting Fields**
- Easily omit fields in a new type
```typescript
type User = {
name: string;
email: string;
createdAt: string;
};
type Guest = Omit<User, 'name' | 'email'>;
```
- Interface equivalent looks cumbersome
```typescript
interface User {
name: string;
email: string;
createdAt: string;
}
interface Guest extends Omit<User, 'name' | 'email'> {}; // Works but not pretty
```
**4. Tuples**
- Types handle tuples more elegantly.
```typescript
type Response = [number, string];
const successResponse: Response = [200, 'Success'];
```
- With interfaces
```typescript
interface Response extends Array<number | string> {
0: number;
1: string;
}
```
**5. Using Existing Types**
- You can easily create new types based on existing objects.
```typescript
const aiServices = {
id: 1,
title: 'AI Development',
description: `Lorem ipsum...`,
tags: ['#ai', '#artificialIntelligence']
};
type Services = typeof aiServices;
const services: Services[] = [{...}];
```
- Using as const for literal types
```typescript
const successResponse = {
status: 'Success',
code: 200,
data: [{...}]
} as const;
```
### Advantages of Interfaces
**1. Declaration Merging**
- Interfaces can be merged, allowing you to add fields to an existing interface.
```typescript
interface User {
name: string;
email: string;
}
interface User {
createdAt: string;
}
const user: User = {
name: 'Prashant',
email: '023prashantsharma@gmail.com',
createdAt: '01/01/2024'
};
```
**2. Class Implementation**
- Interfaces are ideal for class-based models and allow for more descriptive declarations
```typescript
interface Student {
name: string;
age: number;
className: string;
}
class StudentImpl implements Student {
name: string;
age: number;
className: string;
constructor(name: string, age: number, className: string) {
this.name = name;
this.age = age;
this.className = className;
}
}
```
## Conclusion
- When to Use `type`:
For primitive types, union types, tuples, and when needing more flexibility.
To create complex type combinations and utility types like Omit.
- When to Use `interface`:
For object type declarations, especially when extending or implementing classes.
When declaration merging is beneficial.
**Official Recommendations**
1. Interfaces for Better Documentation and Readability:
Interfaces are often preferred for their readability and self-documenting nature.
2. Performance Considerations:
While interfaces may have slight performance advantages in very large codebases, this is typically negligible for most applications.
3. Declaration Merging:
Interfaces can merge, which can be both a feature and a pitfall. It allows augmenting existing types provided by libraries.
By balancing the use of type and interface appropriately, you can leverage the strengths of each to write more effective and maintainable TypeScript code.
| 023prashantsharma |
1,900,891 | Unlock Your Coding Potential with "Data Structures and Algorithms" 🔑 | Comprehensive course on data structures and algorithms, taught by an experienced professor at the University of Florida. Covers fundamental topics, emphasizes problem-solving, and prepares students for technical interviews. | 27,844 | 2024-06-26T05:45:24 | https://getvm.io/tutorials/cop-3530-data-structures-and-algorithms-prof-sahni-ufl | getvm, programming, freetutorial, universitycourses |
As a computer science enthusiast, I recently stumbled upon an incredible resource that has completely transformed my understanding of data structures and algorithms. Introducing the "Data Structures and Algorithms" course, taught by the esteemed Professor Sahni at the University of Florida. 🎓
## Course Overview
This comprehensive course delves deep into the fundamental concepts of data structures and algorithms, covering a wide range of topics, including arrays, linked lists, stacks, queues, trees, and graphs. What sets this course apart is the emphasis on problem-solving and algorithm analysis, which is crucial for anyone aspiring to excel in the field of computer science or software engineering. 💻
## Highlights and Features
The course is designed to provide a hands-on, immersive learning experience. Through a series of programming assignments, you'll have the opportunity to reinforce the concepts you've learned and develop your problem-solving skills. 🧠 The course is taught by an experienced professor from a top-ranked university, ensuring that you receive the highest quality of instruction.
## Why You Should Enroll
Whether you're a student or a working professional, this course is an absolute must-have. It lays a solid foundation for more advanced courses and prepares you for the rigorous technical interviews and coding challenges that are so prevalent in the industry. 🚀 By mastering data structures and algorithms, you'll unlock a new level of problem-solving prowess and set yourself up for success in your future endeavors.
So, what are you waiting for? Enroll in the "Data Structures and Algorithms" course today and embark on a transformative learning journey! 🌟 You can find the course at the following link: [http://www.cise.ufl.edu/~sahni/cop3530/](http://www.cise.ufl.edu/~sahni/cop3530/)
## Bring the Classroom to Your Fingertips with GetVM Playground 🖥️
To truly master the concepts covered in the "Data Structures and Algorithms" course, I highly recommend utilizing the GetVM Playground. This powerful Chrome extension provides an online coding environment that allows you to practice and experiment with the course material in real-time. 💻
With the GetVM Playground, you can dive right into the course content and put your newfound knowledge to the test. The seamless integration with the course materials ensures a seamless learning experience, where you can easily access the Playground directly from the course resources. 🚀
The Playground offers a range of benefits that make it an invaluable tool for your learning journey. You can write and execute code, test your algorithms, and receive instant feedback, all within a user-friendly and distraction-free environment. 🧠 This hands-on approach reinforces the concepts you've learned and helps you develop a deeper understanding of data structures and algorithms.
Don't just take my word for it – experience the power of the GetVM Playground for yourself. You can access the Playground for the "Data Structures and Algorithms" course at the following link: [https://getvm.io/tutorials/cop-3530-data-structures-and-algorithms-prof-sahni-ufl](https://getvm.io/tutorials/cop-3530-data-structures-and-algorithms-prof-sahni-ufl). Unlock your full potential and take your coding skills to new heights with this exceptional learning tool. 🌟
---
## Practice Now!
- 🔗 Visit [Data Structures and Algorithms | COP 3530 | Prof Sahni, UFL](http://www.cise.ufl.edu/~sahni/cop3530/) original website
- 🚀 Practice [Data Structures and Algorithms | COP 3530 | Prof Sahni, UFL](https://getvm.io/tutorials/cop-3530-data-structures-and-algorithms-prof-sahni-ufl) on GetVM
- 📖 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 |
1,900,890 | Best IT Recruitment Agency in Noida | Explore the Best IT Recruitment Agency in Noida with TalentOnLease. We address the industry's... | 0 | 2024-06-26T05:43:11 | https://dev.to/talentonlease01/best-it-recruitment-agency-in-noida-kap | recruitment | Explore the Best **[IT Recruitment Agency](https://talentonlease.com/)** in Noida with TalentOnLease. We address the industry's technical talent deficit by connecting clients and partners through a collaborative platform. Our vast network of IT Services and Solution providers guarantees top-tier technical competence for your crucial projects. Benefit from flexible engagement choices, such as hiring IT contractors, without the necessity for full-time employment contracts. Trust TalentOnLease to meet your IT recruitment requirements efficiently and effectively. Contact us for outstanding service and knowledge.
| talentonlease01 |
1,900,886 | Top Node.js Backend Frameworks for 2024 | As the backbone of modern web applications, backend frameworks play a critical role in the... | 0 | 2024-06-26T05:41:10 | https://devtoys.io/2024/06/25/top-node-js-backend-frameworks-for-2024/ | webdev, node, javascript, devtoys | ---
canonical_url: https://devtoys.io/2024/06/25/top-node-js-backend-frameworks-for-2024/
---
As the backbone of modern web applications, backend frameworks play a critical role in the efficiency, scalability, and maintainability of your projects. Node.js, known for its non-blocking, event-driven architecture, has become a popular choice for building server-side applications. In this article, we’ll explore and compare some of the best Node.js backend frameworks for 2024 to help you choose the right one for your next project.
---
## 1. Express.js
**Overview**
Express.js is the most popular and widely used Node.js framework. It’s minimalistic, flexible, and provides a robust set of features for web and mobile applications.
## Key Features
- **Minimalistic**: Lightweight and unopinionated, allowing for high customization.
- **Middleware Support**: A rich ecosystem of middleware to handle various tasks.
- **Routing**: Powerful routing capabilities.
Compatibility: Works seamlessly with various template engines and databases.
## Pros
- Easy to learn and use.
- Extensive documentation and community support.
- Highly customizable.
## Cons
- Lack of built-in features compared to more opinionated frameworks.
- Middleware management can become complex in larger applications.
---
## 2. Koa.js
**Overview**
Koa.js is developed by the creators of Express.js and aims to be a smaller, more expressive, and more robust foundation for web applications and APIs.
## Key Features
- **Async/Await**: Designed to leverage async/await for better control flow.
- **Lightweight**: Minimalist core without middleware, encouraging modularity.
- **Context**: Enhanced context handling to avoid callback hell.
## Pros
- Cleaner and more readable code with async/await.
- Greater control over request and response handling.
- Encourages modular architecture.
## Cons
- Smaller community compared to Express.js.
- Requires more manual setup for common tasks.
---
## 3. NestJS
**Overview**
NestJS is a progressive Node.js framework that leverages TypeScript and aims to provide an out-of-the-box application architecture.
## Key Features
- **Modular Architecture**: Encourages a modular approach to building applications.
- **TypeScript**: Full TypeScript support, enhancing code quality and developer productivity.
- **Dependency Injection**: Built-in support for dependency injection.👀
- **Microservices**: Support for microservices and GraphQL.
## Pros
- Strong TypeScript support.
- Well-structured and scalable applications.
- Rich set of built-in features and modules.
## Cons
- Steeper learning curve, especially for developers new to TypeScript.
- Can be overkill for simple projects.
---
## 👀 For more in-depth comparison, continue reading here! -> [Top Node.js Backend Frameworks for 2024](https://devtoys.io/2024/06/25/top-node-js-backend-frameworks-for-2024/) | 3a5abi |
1,900,888 | OpenAI Will Terminate Its Services in China: A Comprehensive Analysis | According to the political policies in some countries, they are not allowed to use ChatGPT. Now,... | 0 | 2024-06-26T05:39:31 | https://dev.to/derek-compdf/openai-will-terminate-its-services-in-china-a-comprehensive-analysis-257d | chatgpt, ai, openai | According to the political policies in some countries, they are not allowed to use ChatGPT. Now, OpenAI will block the API traffic from those countries like China. This abrupt shift leaves a significant void in the Chinese AI landscape, given OpenAI’s contributions to natural language processing and artificial intelligence advancements. The decision impacts a vast consumer base and numerous startups that leverage OpenAI’s cutting-edge technology.
## The Impact on the Startups that Are Based on OpenAI
### Challenges Facing Startups
The Startups that heavily depend on OpenAI’s technology are now grappling with severe consequences. Without access to OpenAI's models, many of these startups face the threat of business disruption:
Catastrophic Crisis: Startups that have repurposed OpenAI’s AI capabilities into their services and products are in a state of crisis. Their business models have been fundamentally challenged, requiring urgent pivots or alternative technological solutions.
Dependence on External Technology: The reliance on third-party AI technologies has underscored a critical vulnerability—an over-reliance on external entities for core business functionalities.
### The Solution: Self-Developed Technology
Having self-developed technology is a challenging yet crucial endeavor. Investing in proprietary research and development not only reduces dependency risks but also fortifies the business against unforeseen shifts in external collaborations.
For example, [ComPDFKit](https://www.compdf.com)’s Intelligent Document Processing (IDP) is a specialized AI technology designed to handle PDF documents efficiently. It is the process of using technologies such as Artificial Intelligence (AI), Machine Learning (ML), Computer Vision (CV), and Natural Language Processing (NLP) to automatically capture, understand, process, and analyze document content. Unlike traditional document management systems, IDP is capable of handling structured, semi-structured, and unstructured documents, thereby extracting useful information and converting it into actionable data.
## Examples of Companies with Proprietary AI Technologies
Here are several exemplary companies that have pioneered independent AI development in natural language processing. Their proprietary technologies serve as benchmarks for the industry.
### [GPT-4](https://openai.com/gpt-4/)
Developer: OpenAI In 2023, OpenAI continued to pioneer with the release of its GPT-4 model, following the public introduction of ChatGPT and earlier GPT versions. This latest iteration surpasses its predecessors in complexity, the amount of text used for pre-training, and performance across a wide range of NLP tasks.
### [ULMFiT](https://docs.fast.ai/examples/ulmfit.html)
Developer: Fast.ai Universal Language Model Fine-tuning (ULMFiT) is a significant advancement in transfer learning for NLP. Its robust performance in adapting pre-trained language models to specific tasks without requiring massive data makes it a valuable tool for NLP applications.
### [Transformer](https://en.wikipedia.org/wiki/Transformer_(deep_learning_architecture))
Developer: Google Introduced by Google in 2017, Transformer models revolutionized NLP with their unique architecture. These models utilize a special embedding layer that converts input sequences into vectors, followed by encoders and decoders linked throughout the model. This approach has authored a new era in AI capabilities.
### [ELMo](https://allennlp.org/elmo)
Developer: Allen Institute for AI The Embeddings from Language Models (ELMo) impacted NLP by focusing on contextual word representations. These embeddings take into account syntax, semantics, and context, enhancing the performance of various NLP tasks significantly.
### [PaLM 2](https://ai.google/palm)
Developer: Google Google’s Bard, as of May 2023, transitioned to using the PaLM 2 model rather than the earlier LaMDA model. PaLM 2 introduces multiple new features such as coding, Google Workspace support, and logical reasoning.
### [BERT](https://github.com/google-research/bert)
Developer: Google The Bidirectional Encoder Representations from Transformers (BERT) model set new benchmarks in understanding the deep context of language through its bidirectional training technique.
### Leading Natural Language Models in China
China has been advancing its AI capabilities, especially in natural language processing. Here are the top NLP models developed domestically:
### [文心一言 (Wenxin Yiyan)](https://yiyan.baidu.com/)
Developed by Baidu, 文心一言 offers robust natural language understanding and generation capabilities tailored to the Chinese language and context.
### [讯飞星火 (iFlytek Spark)](https://xinghuo.xfyun.cn/)
iFlytek’s 星火 is another prominent Chinese NLP model, excelling in speech recognition and translation tasks, and seamlessly integrating into various consumer and enterprise applications.
### [天工 3.5 (TianGong 3.5)](https://www.tiangong.cn/)
Developed by Alibaba, 天工 3.5 stands out for its advanced natural language comprehension and generation, supporting various commercial and industrial applications within China.
## Conclusion
The exit of OpenAI from China marks a significant turning point for the local AI industry. It emphasizes the importance of self-reliance in AI technology development and reinforces the push for innovation within Chinese technology companies. As the landscape evolves, indigenous advancements are likely to bridge the gap left by OpenAI, fostering a more resilient and independent AI ecosystem in China.
| derek-compdf |
1,900,887 | e-commerce marketplace management services in delhi | Delhi is home to a number of businesses that provide [ee-commerce marketplace management services].... | 0 | 2024-06-26T05:37:47 | https://dev.to/reftonbia6/e-commerce-marketplace-management-services-in-delhi-541m | ecommerce, marketplace, amazon, programming | Delhi is home to a number of businesses that provide [ee-commerce marketplace management services]. (urhttps://reftonbia.com/l)These[ organization])s offer a variety of services to assist companies in selling their goods on different e-commerce sites such as Amazon, Flipkart, Myntra, and so on. Some of the main services they provide are as follows:
Establishing and Managing Accounts:
creating seller accounts on several e-commerce websites.
enhancing visibility and sales through listing management and optimization.
Services for Product Listings:
Making thorough and well-suited product listings.
creating catchy titles and descriptions for products.
submitting top-notch product photos.
Management of Inventory:
Controlling inventory levels to avoid shortages or overstocking.
coordinating inventory across several platforms.
Order Administration:
Managing the fulfillment and processing of orders.
Handling exchanges and refunds.
SEO and Marketing:
Implementing SEO strategies to improve product ranking.
Running advertising campaigns (PPC, sponsored ads) on e-commerce platforms.
Social media marketing and influencer collaborations.
Customer Service:
Handling customer inquiries and complaints.
Providing support to improve customer satisfaction and retention.
Analytics and Reporting:
Monitoring sales performance and generating reports.
Analyzing data to identify trends and optimize strategies.
| reftonbia6 |
1,900,885 | I built a tool to turn YouTube into a learning platform | Hey Dev.to! I wanted to share with you a milestone I reached - launching my web app, NoteTube. I... | 0 | 2024-06-26T05:33:50 | https://dev.to/kentokana/i-built-a-tool-to-turn-youtube-into-a-learning-platform-167m | webdev, saas, solopreneur, buildinpublic | Hey Dev.to!
I wanted to share with you a milestone I reached - launching my web app, [NoteTube](https://notetube.app).
I started building this app because I wanted a tool that will shorten the onboarding sessions to teach new hires the tech stack that we use. I figured that YouTube content can do 90% of the teaching, and I can fill in the gaps by leaving detailed annotations on YouTube videos.
[NoteTube.app](http://NoteTube.app) is an online tool that enables users to build notes using YouTube’s educational resources. While YouTube has an awesome community of people creating educational content, I find the actual learning experience lackluster - after all, the platform is optimized for consumption, not learning.
NoteTube allows you to make time-stamped annotations on YouTube videos, ensuring your notes are contextualized with the video content. Whether you’re watching a coding tutorial or your favorite cooking influencer’s video, NoteTube enhances insights by facilitating chronological, well-organized note-taking.
How it works:
1. Copy the URL of the YouTube video you want to take notes for
2. Submit the URL in NoteTube to generate your note
3. Start taking notes
4. Share notes with your peers, or keep them private to yourself - with the ability to export your notes as an interactive PDF.
Features:
1. Timestamped note-taking
2. Creating both private and public facing notes
3. Tagging notes for organization
4. Creating note collections to organize multiple notes in one location
5. Create an interactive PDF export of your notes
I am also working on a bunch of features in the road ahead - such as AI integration for summarizing the video through transcripts, as well as identifying irrelevant parts of the video that isn't as conducive to your learning - so that you can cut out distractions as much as possible.
I hope NoteTube can help you learn more effectively using the incredible educational content on YouTube! Try out NoteTube here:
[Website](https://notetube.app)
Thanks so much for reading!
[Twitter/X](https://x.com/TokenXer/status/1805386122719379956)
[Product Hunt](https://www.producthunt.com/products/notetube) | kentokana |
1,900,884 | Maven Project Setup Guide | Step-by-Step Guide to Creating a Maven Project Using Maven Archetype You can create a new Maven... | 0 | 2024-06-26T05:32:27 | https://dev.to/amit_singh_bisht/maven-project-setup-guide-24po |
Step-by-Step Guide to Creating a Maven Project
Using Maven Archetype
You can create a new Maven project by running the following command:
```
mvn archetype:generate
```
This command will prompt you to enter various details about your project and generate the pom.xml file. Below is an example interaction:
```
3444: remote -> za.co.absa.hyperdrive:component-archetype_2.12 (-)
Choose a number or apply filter (format: [groupId:]artifactId, case sensitive contains): 2155:
If you press enter, it will select (2155: remote -> org.apache.maven.archetypes:maven-archetype-quickstart (An archetype which contains a sample Maven project.)
Choose org.apache.maven.archetypes:maven-archetype-quickstart version:
1: 1.0-alpha-1
2: 1.0-alpha-2
3: 1.0-alpha-3
4: 1.0-alpha-4
5: 1.0
6: 1.1
7: 1.3
8: 1.4
Choose a number: 8:
If you press enter, it will select (8: 1.4)
Define value for property 'groupId': com.example.project
Define value for property 'artifactId': my-app
Define value for property 'version' 1.0-SNAPSHOT: :
Define value for property 'package' com.example.project: : com.example.project.myapp
(press enter or any value that you want)
REMEMBER :- groupId, artifactId, version, package can be changed at later stage as well
Confirm properties configuration:
groupId: com.example.project
artifactId: my-app
version: 1.0-SNAPSHOT
package: com.example.project.myapp
Y: : (press enter)
[INFO] ----------------------------------------------------------------------------
[INFO] Using following parameters for creating project from Archetype: maven-archetype-quickstart:1.4
[INFO] ----------------------------------------------------------------------------
[INFO] Parameter: groupId, Value: com.example.project
[INFO] Parameter: artifactId, Value: my-app
[INFO] Parameter: version, Value: 1.0-SNAPSHOT
[INFO] Parameter: package, Value: com.example.project.myapp
[INFO] Parameter: packageInPathFormat, Value: com/example/project/myapp
[INFO] Parameter: package, Value: com.example.project.myapp
[INFO] Parameter: groupId, Value: com.example.project
[INFO] Parameter: artifactId, Value: my-app
[INFO] Parameter: version, Value: 1.0-SNAPSHOT
[INFO] Project created from Archetype in dir: /Users/amitb/Desktop/code/lambdatest/professional-services-java-cucumber/my-app
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 00:50 min
[INFO] Finished at: 2024-06-26T10:37:56+05:30
[INFO] ------------------------------------------------------------------------
```
Skipping the Questionnaire
To skip the interactive questionnaire and create a Maven project with one command, use:
```
mvn archetype:generate -DgroupId=com.example.project -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false
```
Example output:
```
mvn archetype:generate -DgroupId=com.example.project -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------< org.apache.maven:standalone-pom >-------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] >>> archetype:3.2.1:generate (default-cli) > generate-sources @ standalone-pom >>>
[INFO]
[INFO] <<< archetype:3.2.1:generate (default-cli) < generate-sources @ standalone-pom <<<
[INFO]
[INFO]
[INFO] --- archetype:3.2.1:generate (default-cli) @ standalone-pom ---
[INFO] Generating project in Batch mode
[INFO] ----------------------------------------------------------------------------
[INFO] Using following parameters for creating project from Old (1.x) Archetype: maven-archetype-quickstart:1.0
[INFO] ----------------------------------------------------------------------------
[INFO] Parameter: basedir, Value: /Users/amitb
[INFO] Parameter: package, Value: com.example.project
[INFO] Parameter: groupId, Value: com.example.project
[INFO] Parameter: artifactId, Value: my-app
[INFO] Parameter: packageName, Value: com.example.project
[INFO] Parameter: version, Value: 1.0-SNAPSHOT
[INFO] project created from Old (1.x) Archetype in dir: /Users/amitb/my-app
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.300 s
[INFO] Finished at: 2024-06-26T10:43:15+05:30
[INFO] ------------------------------------------------------------------------
```
The pom.xml Structure
## Main Block
The entire pom.xml is enclosed within the following tags:
```
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
</project>
```
## Basic Properties
This block defines the most basic properties of the application:
```
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example.project</groupId>
<artifactId>my-app</artifactId>
<version>0.1.0</version>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
[...]
</project>
```
## Dependencies Block
For this project, I am importing the JDBC library for accessing SQLite databases:
```
<dependencies>
<!-- https://mvnrepository.com/artifact/org.xerial/sqlite-jdbc -->
<dependency>
<groupId>org.xerial</groupId>
<artifactId>sqlite-jdbc</artifactId>
<version>3.20.0</version>
</dependency>
</dependencies>
```
### Key Points
1. groupId: A unique base name of your company or group.
2. artifactId: A unique name of the project you are developing.
3. version: The version of the project you are developing.
4. packaging: Type of artifact (e.g., jar, war).
5. dependencies: External libraries required for your project.
With this setup, you can easily manage dependencies and keep your project up to date with the latest versions.
| amit_singh_bisht | |
1,900,883 | Zeeve RaaS Partners with PandaSea for the Launch of their OP Stack Powered Layer2 chain | We are delighted to announce our partnership with PandaSea as their chosen Rollups-as-a-Service... | 0 | 2024-06-26T05:26:26 | https://www.zeeve.io/blog/zeeve-raas-partners-with-pandasea-for-the-launch-of-their-op-stack-powered-layer2-chain/ | announcement, pandasea, rollup | <p>We are delighted to announce our partnership with <a href="https://pandasea.io/">PandaSea</a> as their chosen <a href="https://www.zeeve.io/rollups/">Rollups-as-a-Service provider</a> for the new L2 OP chain built with the <a href="https://www.zeeve.io/appchains/optimistic-rollups/">OP Stack</a>. We warmly welcome the PandaSea community to the Zeeve RaaS ecosystem and look forward to advancing SocialFi and creator economy together.</p>
<p>PandaSea.io is a layer 2 Web3 platform focused on integrating social finance and sports engagement. Utilizing its own chain on the OP Stack, PandaSea provides a robust, scalable solution for decentralized applications, with PandaSea Coin (PANDA) serving as its native gas token. PandaSea aims to redefine the interaction between fans and their favorite sports through innovative products like PandaFantasy.net.</p>
<p>Panda chain testnet on OP Stack is already live and their mainnet will be coming soon. </p>
<p>As an infrastructure partner, <a href="https://www.zeeve.io/">Zeeve</a> is committed to equipping PandaSea with a robust suite of tools and integrations for streamlined deployment, effortless management, and frictionless user onboarding for their OP Stack Chain. </p>
<p><em>“As an infrastructure partner, Zeeve is committed to equipping PandaSea with a robust suite of tools and integrations for streamlined deployment, effortless management, and frictionless user onboarding for their OP stack powered L2 Chain. We’ll ensure, with efficient management, that the ecosystem also remains compliant and meets the objective of PandaSea as well as the broader goals of OP Labs.”</em></p>
<p>Dr Ravi Chamria</p>
<p>Co-founder and CEO of Zeeve</p>
<p><em>“We are pleased to have Zeeve as a partner, and we are excited for the world to discover the power of our platform, and to experience social and sports in a new way with our new PandaFantasy.net stock market for sports.”</em></p>
<p>Steve van Zutphen</p>
<p>PandaSea founder</p>
<h2 class="wp-block-heading" id="h-key-features-and-deliverables">Key Features and Deliverables</h2>
<h3 class="wp-block-heading" id="h-quick-and-automated-setup">Quick and Automated Setup</h3>
<li><strong>Automated Deployment:</strong> Utilize automation scripts and infrastructure-as-code tools (like Terraform or Ansible) to quickly deploy the OP Stack-based L2 Rollup infrastructure.</li>
<li><strong>Compliance and Security:</strong> Ensure the deployment process adheres to industry-standard security practices and compliance requirements. This includes secure key management, encrypted communication channels, and regular security audits.</li>
<h3 class="wp-block-heading" id="h-management-dashboards">Management Dashboards</h3>
<li><strong>Operational Activities Monitoring: </strong>Provide dashboards for real-time monitoring of the rollup network and its operations. </li>
<li><strong>Customizable Dashboards:</strong> Allow users to customize their dashboards to monitor specific metrics relevant to their operations.</li>
<li><strong>Alerting Systems:</strong> Implement an alerting system to notify the team of any critical issues or performance degradation. This could include email alerts, SMS, or integrations with tools like Slack.</li>
<li><strong>Comprehensive Logging:</strong> Ensure all activities are logged comprehensively, with logs stored securely and accessible for auditing and troubleshooting.</li>
<h3 class="wp-block-heading" id="h-necessary-tools-and-third-party-integrations">Necessary Tools and Third-Party Integrations</h3>
<li><strong>Rebranded Explorer:</strong> Offer a customizable blockchain explorer that can be branded to PandaSea requirements.</li>
<li><strong>Bridge UI:</strong> Develop a user-friendly interface for bridging assets between L1 and L2.</li>
<li><strong>Faucets for Testnet: </strong>Provide faucets to distribute testnet tokens, aiding developers and testers.</li>
<li><strong>Third-Party Integrations:</strong> Integrate additional tools and services as required by PandaSea, ensuring seamless operation and compatibility with their existing systems.</li>
<h3 class="wp-block-heading" id="h-regular-maintenance-and-upgrades">Regular Maintenance and Upgrades</h3>
<li><strong>Scheduled Maintenance: </strong>Regularly schedule maintenance windows to apply updates and patches, ensuring minimal disruption to the service.</li>
<li><strong>Automatic Upgrades:</strong> Implement a process for automatic or semi-automatic upgrades to keep the stack up-to-date with the latest features and security improvements.</li>
<h3 class="wp-block-heading" id="h-24-7-support-with-enterprise-grade-slas">24/7 Support with Enterprise Grade SLAs</h3>
<li><strong>Round-the-Clock Support: </strong>Provide 24/7 technical support to handle any issues or incidents, ensuring high availability and reliability.</li>
<li><strong>Enterprise SLAs: </strong>Offer Service Level Agreements that guarantee response times, uptime, and performance standards suitable for enterprise needs.</li>
<h3 class="wp-block-heading" id="h-integration-of-tracehawk">Integration of TraceHawk</h3>
<li><strong>Enhanced Monitoring and Analytics:</strong> Utilize TraceHawk to enhance monitoring and analytics capabilities, providing deeper insights into rollup performance and security.</li>
<li><strong>Seamless Integration: </strong>Ensure TraceHawk is seamlessly integrated into the overall infrastructure, enhancing operational visibility and control.</li><p>With the custom features from Zeeve and the OP Stack, PandaSea will utilize $PANDA as its native gas token, adding substantial utility to the token and promoting a vibrant native economy. Transactions made with PANDA will incur lower fees compared to other payment methods and users frequently transacting with PANDA can receive loyalty rewards and bonuses, incentivizing continued engagement on the platform.</p>
<p>Zeeve makes it easy to go from concept to live deployment with our intuitive Rollup Launchpad. Our network of over <a href="https://www.zeeve.io/integrations/">40 industry partners </a>allows for quick integration with decentralized and developer services. Trusted by more than 30,000 users and 40 institutional partners, Zeeve's strong security and support systems make it the go-to choice for global infrastructure.</p>
<p>For further details on <a href="https://www.zeeve.io/appchains/optimistic-rollups/">Zeeve's managed OP Stack chains</a>, visit our webpage.</p> | zeeve |
1,900,882 | VibeTabs: Customize Your Browser for Every Task | Hello everyone, I’m excited to share with you my latest Chrome extension, VibeTabs! As a web... | 0 | 2024-06-26T05:23:45 | https://dev.to/luciandev/vibetabs-customize-your-browser-for-every-task-19i9 | extensions, webdev, javascript, productivity | Hello everyone,
I’m excited to share with you my latest Chrome extension, VibeTabs! As a web developer, I often find myself juggling multiple tasks, each requiring different sets of tabs and resources. That’s why I created VibeTabs – to make switching between different browsing setups as seamless as possible.
## What is VibeTabs?
VibeTabs is a Chrome extension that allows you to create task-based setups. Each setup can include specific tabs and background music tailored to different activities, like work, study, or relaxation.
## Features
**Create Task-Based Setups**
With VibeTabs, you can save different browsing setups with specific tabs and background music. You can create as many setups as you need, each tailored to a different task or mood.
**Easy Switching**
Switching between setups is a breeze. Just click on the VibeTabs icon in the Chrome toolbar and select the setup you want to activate. Your browser will instantly transform to match your chosen mood.
**Daily Prompts**
Receive a daily prompt to set your mood for the day. This feature helps you start your day on the right note and ensures you’re always in the right mindset.
**Manage Setups**
Easily edit or delete your saved setups through the options page. You can also deactivate the current setup if you want to return to your default browsing state.
**Context Menu Integration**
Right-click on any page and add it to a specific mood setup. This makes it super easy to update your setups on the fly.
## Why Use VibeTabs?
I created VibeTabs to streamline my workflow, and I believe it can help others too. Here are a few reasons why you might find it useful:
**Productivity Boost**: Having the right tabs and background music can keep you focused and productive.
**Customization**: Tailor your browsing experience to fit your needs, whether it’s work, study, or relaxation.
**Ease of Use**: Simple interface and easy management of setups make it accessible for everyone.
## Getting Started
**Install VibeTabs**: Download and install the extension from the [Chrome Web Store](https://chromewebstore.google.com/detail/vibetabs/jhgjhmkhnlkkopdkljnbnaghpcdainha).
**Create Your First Setup**: Open the VibeTabs popup, click on “Create New Mood,” and set up your tabs and music.
**Switch and Enjoy**: Easily switch between setups and enjoy a personalized browsing experience.
## Conclusion
I hope you find VibeTabs as useful and enjoyable as I do. Give it a try, and let me know what you think! If you have any feedback or need support, feel free to reach out. Happy browsing! | luciandev |
1,900,880 | data scientist course in mumbai | Are you looking for the best Data Scientist course in Mumbai To boost your career, 360DigiTMG is the... | 0 | 2024-06-26T05:21:38 | https://dev.to/yarava_sreenivas_3cb0124c/data-scientist-course-in-mumbai-13n3 |
Are you looking for the best [Data Scientist course in Mumbai](https://360digitmg.com/india/mumbai/data-science-certification-course-training-institute) To boost your career, 360DigiTMG is the right place for you. Avail of the best training programs and real-time projects with a world-class curriculum that helps you bag your dream job.
| yarava_sreenivas_3cb0124c | |
1,900,867 | Becoming a 1% Better MERN Stack Developer Every Day | Introduction As a MERN stack developer, continuous improvement is crucial to staying ahead in the... | 0 | 2024-06-26T05:19:45 | https://raajaryan.tech/becoming-a-1-better-mern-stack-developer-every-day | node, react, 100daysofcode, beginners | [](https://buymeacoffee.com/dk119819)
**Introduction**
As a MERN stack developer, continuous improvement is crucial to staying ahead in the fast-paced tech industry. Small, consistent efforts can lead to significant growth over time. Here’s a guide to help you become 1% better today by focusing on practical exercises, learning and development, code quality, and more.
**Practical Exercises**
1. **Code Review and Refactoring**
- Review a recent piece of your code and look for ways to improve its readability, efficiency, or maintainability. This exercise not only enhances your code quality but also helps you understand your coding habits better.
2. **Build a Small Feature**
- Adding a new feature to an existing project or starting a mini-project can help you focus on specific aspects of the MERN stack you want to improve. For instance, you could implement user authentication or integrate a third-party API.
**Learning and Development**
3. **Read Documentation**
- Spend 30 minutes today reading the latest documentation for React, Node.js, or MongoDB. Focus on sections you’re less familiar with to expand your knowledge base.
4. **Watch a Tutorial**
- Tutorials can offer practical insights and new techniques. Watch a tutorial on advanced MERN topics like server-side rendering with Next.js or using GraphQL with MongoDB.
**Code Quality and Best Practices**
5. **Implement a Design Pattern**
- Choose a design pattern such as Singleton, Observer, or Factory, and implement it in your project. Understanding and applying design patterns can significantly improve your code structure and reusability.
6. **Write Unit Tests**
- Writing unit tests ensures your code is reliable and bug-free. Use testing frameworks like Jest or Mocha to write tests for a module in your application.
**Networking and Community Engagement**
7. **Participate in a Forum or Community**
- Engage in discussions on platforms like Stack Overflow, Reddit, or GitHub. Helping others with their queries not only reinforces your own knowledge but also exposes you to diverse perspectives and solutions.
8. **Follow Influential Developers**
- Stay updated with industry trends by following MERN stack influencers on Twitter or LinkedIn. Engaging with their content can provide valuable insights and keep you motivated.
**Productivity and Workflow**
9. **Optimize Your Development Environment**
- Customize your IDE or editor with useful extensions, themes, or settings to enhance productivity. A well-optimized development environment can save you time and reduce frustration.
10. **Practice Problem-Solving**
- Solve coding problems on platforms like LeetCode or HackerRank to sharpen your algorithmic thinking and problem-solving skills. This practice is essential for tackling real-world challenges efficiently.
**UI/UX Focus**
11. **Improve UI/UX**
- Focus on enhancing the user interface or experience of your application. Pay attention to design principles like consistency, feedback, and user control to create a more intuitive and engaging product.
**Reflect and Plan**
12. **Reflect on Your Work**
- Take a few minutes to reflect on what you’ve learned today and how you can apply it to future projects. Set a small, achievable goal for tomorrow based on today’s progress.
**Conclusion**
Improving as a MERN stack developer doesn’t always require massive changes. By focusing on small, consistent improvements, you can significantly enhance your skills and stay ahead in the industry. Implement one or more of these activities today and watch your expertise grow steadily over time.
**Call to Action**
What steps will you take today to become a better developer? Share your thoughts and experiences in the comments below!
---
## 💰 You can help me by Donating
[](https://buymeacoffee.com/dk119819)
| raajaryan |
1,900,866 | How to Dynamically Generate and Decode a QR Code with NodeJs | In today's digital age, QR (Quick Response) codes have become vital for bridging the gap between the... | 0 | 2024-06-26T05:16:29 | https://dev.to/codegirl0101/how-to-dynamically-generate-and-decode-a-qr-code-with-nodejs-3310 | tutorial, node, qrcode, webdev | In today's digital age, QR (Quick Response) codes have become vital for bridging the gap between the physical and digital domains. They provide a range of applications, covering everything from payment and verification to smooth information exchange. Node.js, a popular JavaScript runtime environment, allows developers to easily produce qrcode with nodejs. The development is pretty easy with qrcode npm. The qrcode is used in manufacturing for product labeling, UPI-based payment systems, chat systems such as WhatsApp, and even app distribution. QR codes provide a simple and effective means of storing and conveying data, making them extremely useful tools in current digital applications.
In this blog post, I will explain how to develop [qrcode js generator](https://www.codegirl0101.dev/2024/06/how-to-dynamically-generate-and-decode.html) in your application with an easy-to-understand qrcode example. As well as you will get a thorough understanding on qrcode decoder.
Visit my blog post for a detailed explanation with standard examples -
https://www.codegirl0101.dev/2024/06/how-to-dynamically-generate-and-decode.html | codegirl0101 |
1,900,865 | How we're trying to make our PHP devs efficient also with Golang | For the quick background presentation (👋), I'm a backend / platform engineer, I work in a company... | 0 | 2024-06-26T05:14:26 | https://dev.to/ekkinox/how-were-trying-to-make-our-php-devs-efficient-also-with-golang-1ef4 | go, php, opensource, backend | For the quick background presentation (:wave:), I'm a backend / platform engineer, I work in a company with a monolithic PHP (Laravel) main application.
We're in the journey to split it in smaller services or to move some recurring logic as sidecars. And for this, we noticed that the best choice **was not always PHP**, but sometimes **Golang was more appropriate** for our use cases.
The **main problems** we faced:
- Since our company devs are mostly all PHP devs, we needed a way to ramp them up on Golang.
- We also needed to avoid to have too much differences in the Go code produced by different teams, and their code to have the same conventions when it comes to our platform compatibility (same way to log, same way to handle env vars / config, same way to handle traces / metrics, etc...)
We (platform team) worked and iterated on some Go app skeletons, pre-configuring some libs, applying some shared conventions, and with time it became consequent enough that we considered to open source it.
So I present to you [Yokai](https://github.com/ankorstore/yokai) :rocket:
It's a **simple**, **modular** and **observable** **Go** framework for **backend applications**.
It comes with a bunch of features (that we needed on our own production projects): HTTP server, gRPC server, workers, database instrumentation, etc ... while always keeping a **strong focus on observability** (logs, traces, metrics). Everything is in the docs if you want to know more about it.
So, if you're coming from a PHP framework background (like Symfony, Laravel) and want to start **exploring** Go, this offers you something close to what you're used to: dependency injection, observability, easy ways to test, etc ... but for Go :)
Feel free to take a look (docs & demo apps), to comment, and happy coding 👍
Check [Yokai on GitHub](https://github.com/ankorstore/yokai). | ekkinox |
1,900,863 | Top 20 React.JS interview questions. | As a React developer, it is important to have a solid understanding of the framework's key concepts... | 0 | 2024-06-26T05:10:34 | https://dev.to/sagor_cnits_73eb557b53820/top-20-reactjs-interview-questions-o0f | javascript, react, interview, node | As a React developer, it is important to have a solid understanding of the framework's key concepts and principles. With this in mind, I have put together a list of 20 important questions that every React developer should know, whether they are interviewing for a job or just looking to improve their skills.
Before diving into the questions and answers, I suggest trying to answer each question on your own before looking at the answers provided. This will help you gauge your current level of understanding and identify areas that may need further improvement.
Let's get started!
**01. What is React and what are its benefits?**
**Ans:** React is a JavaScript library for building user interfaces. It is used for building web applications because it allows developers to create reusable UI components and manage the state of the application in an efficient and organized way.
**02. What is the virtual DOM and how does it work?**
**Ans:** The Virtual DOM (Document Object Model) is a representation of the actual DOM in the browser. It enables React to update only the specific parts of a web page that need to change, instead of rewriting the entire page, leading to increased performance.
When a component's state or props change, React will first create a new version of the Virtual DOM that reflects the updated state or props. It then compares this new version with the previous version to determine what has changed.
Once the changes have been identified, React will then update the actual DOM with the minimum number of operations necessary to bring it in line with the new version of the Virtual DOM. This process is known as "reconciliation".
The use of a Virtual DOM allows for more efficient updates because it reduces the amount of direct manipulation of the actual DOM, which can be a slow and resource-intensive process. By only updating the parts that have actually changed, React can improve the performance of an application, especially on slow devices or when dealing with large amounts of data.
**03. How does React handle updates and rendering?**
**Ans:** React handles updates and rendering through a virtual DOM and component-based architecture. When a component's state or props change, React creates a new version of the virtual DOM that reflects the updated state or props, then compares it with the previous version to determine what has changed. React updates the actual DOM with the minimum number of operations necessary to bring it in line with the new version of the virtual DOM, a process called "reconciliation". React also uses a component-based architecture where each component has its own state and render method. It re-renders only the components that have actually changed. It does this efficiently and quickly, which is why React is known for its performance.
**04. Explain the concept of Components in React?**
**Ans:** A React component is a JavaScript function or class that returns a React element, which describes the UI for a piece of the application. Components can accept inputs called "props", and manage their own state.
**05. What is JSX and why is it used in React?**
**Ans:** JSX is a syntax extension for JavaScript that allows embedding HTML-like syntax in JavaScript. It is used in React to describe the UI, and is transpired to plain JavaScript by a build tool such as Babel.
**06. What is the difference between state and props?
Ans:** State and props are both used to store data in a React component, but they serve different purposes and have different characteristics.
Props (short for "properties") are a way to pass data from a parent component to a child component. They are read-only and cannot be modified by the child component.
State, on the other hand, is an object that holds the data of a component that can change over time. It can be updated using the setState() method and is used to control the behavior and rendering of a component.
**07. What is the difference between controlled and uncontrolled** components in React?
**Ans:** In React, controlled and uncontrolled components refer to the way that forms are handled. A controlled component is a component where the state of the form is controlled by React, and updates to the form's inputs are handled by event handlers. An uncontrolled component, on the other hand, relies on the default behavior of the browser to handle updates to the form's inputs.
A controlled component is a component where the value of input fields is set by state and changes are managed by React's event handlers, this allows for better control over the form's behavior and validation, and it makes it easy to handle form submission.
On the other hand, an uncontrolled component is a component where the value of the input fields is set by the default value attribute, and changes are managed by the browser's default behavior, this approach is less performant and it's harder to handle form submission and validation.
**08. What is Redux and how does it work with React?**
**Ans:** Redux is a predictable state management library for JavaScript applications, often used with React. It provides a centralized store for the application's state, and uses pure functions called reducers to update the state in response to actions.
In a React app, Redux is integrated with React via the react-redux library, which provides the connect function for connecting components to the Redux store and dispatching actions. The components can access the state from the store, and dispatch actions to update the state, via props provided by the connect function.
**09. Can you explain the concept of Higher Order Components (HOC) in React?
Ans:** A Higher Order Component (HOC) in React is a function that takes a component and returns a new component with additional props. HOCs are used to reuse logic across multiple components, such as adding a common behavior or styling.
HOCs are used by wrapping a component within the HOC, which returns a new component with the added props. The original component is passed as an argument to the HOC, and receives the additional props via destructuring. HOCs are pure functions, meaning they do not modify the original component, but return a new, enhanced component.
For example, an HOC could be used to add authentication behavior to a component, such as checking if a user is logged in before rendering the component. The HOC would handle the logic for checking if the user is logged in, and pass a prop indicating the login status to the wrapped component.
HOCs are a powerful pattern in React, allowing for code reuse and abstraction, while keeping the components modular and easy to maintain.
**10. What is the difference between server-side rendering and client-side rendering in React?**
**Ans:** Server-side rendering (SSR) and client-side rendering (CSR) are two different ways of rendering a React application.
In SSR, the initial HTML is generated on the server, and then sent to the client, where it is hydrated into a full React app. This results in a faster initial load time, as the HTML is already present on the page, and can be indexed by search engines.
In CSR, the initial HTML is a minimal, empty document, and the React app is built and rendered entirely on the client. The client makes API calls to fetch the data required to render the UI. This results in a slower initial load time, but a more responsive and dynamic experience, as all the rendering is done on the client.
**11. What are React Hooks and how do they work?**
**Ans:** React Hooks are a feature in React that allow functional components to have state and other lifecycle methods without using class components. They make it easier to reuse state and logic across multiple components, making code more concise and easier to read. Hooks include useState for adding state and useEffect for performing side effects in response to changes in state or props. They make it easier to write reusable, maintainable code.
**12. How does React handle state management?**
**Ans:** React handles state management through its state object and setState() method. The state object is a data structure that stores values that change within a component and can be updated using the setState() method. The state updates trigger a re-render of the component, allowing it to display updated values dynamically. React updates the state in an asynchronous and batched manner, ensuring that multiple setState() calls are merged into a single update for better performance.
**13. How do work useEffect hook in React?
Ans:** The useEffect hook in React allows developers to perform side effects such as data fetching, subscription, and setting up/cleaning up timers, in functional components. It runs after every render, including the first render, and after the render is committed to the screen. The useEffect hook takes two arguments - a function to run after every render and an array of dependencies that determines when the effect should be run. If the dependency array is empty or absent, the effect will run after every render.
**14. Can you explain the concept of server-side rendering in React?
Ans:** Server-side rendering (SSR) in React is the process of rendering components on the server and sending fully rendered HTML to the browser. SSR improves the initial loading performance and SEO of a React app by providing a fully rendered HTML to the browser, reducing the amount of JavaScript that needs to be parsed and executed on the client, and improving the indexing of a web page by search engines. In SSR, the React components are rendered on the server and sent to the client as a fully formed HTML string, improving the initial load time and providing a more SEO-friendly web page.
**15. How does React handle events and what are some common event handlers?**
**Ans:** React handles events through its event handling system, where event handlers are passed as props to the components. Event handlers are functions that are executed when a specific event occurs, such as a user clicking a button. Common event handlers in React include onClick, onChange, onSubmit, etc. The event handler receives an event object, which contains information about the event, such as the target element, the type of event, and any data associated with the event. React event handlers should be passed
as props to the components, and the event handlers should be defined within the component or in a separate helper function.
**16. Can you explain the concept of React context?
Ans:** React context is a way to share data between components without passing props down manually through every level of the component tree. The context is created with a provider and consumed by multiple components using the useContext hook.
**17. How does React handle routing and what are some popular routing libraries for React?
Ans:** React handles routing by using React Router library, which provides routing capabilities to React applications. Some popular routing libraries for React include React Router, Reach Router, and Next.js.
**18. What are some best practices for performance optimization in React?
Ans:** Best practices for performance optimization in React include using memoization, avoiding unnecessary re-renders, using lazy loading for components and images, and using the right data structures.
**19. How does React handle testing and what are some popular testing frameworks for React?
Ans:** React handles testing using testing frameworks such as Jest, Mocha, and Enzyme. Jest is a popular testing framework for React applications, while Mocha and Enzyme are also widely used.
**20. How do you handle asynchronous data loading in React?
Ans:** Asynchronous data loading in React can be handled using various methods such as the fetch API, Axios, or other network libraries. It can also be handled using the useState and useEffect hooks to trigger a state update when data is returned from the API call. It is important to handle loading and error states properly to provide a good user experience.
In conclusion, this blog post covers the top 20 major questions that a React developer should know in 2023. The questions cover a wide range of topics from the basics of React, its benefits and architecture, to more advanced concepts such as JSX, state and props, controlled and uncontrolled components, Redux, Higher Order Components, and more. By trying to answer each question yourself before looking at the answers, you can gain a deeper understanding of the React framework and become a better React developer.
Connect with me on LinkedIn : www.linkedin.com/in/sagor-hossain-web-dev | sagor_cnits_73eb557b53820 |
1,900,856 | Unleash the Power of the Edge: Exploring Supabase Edge Functions | In today's fast-paced world, application performance is paramount. Supabase Edge Functions emerge as... | 0 | 2024-06-26T04:59:19 | https://dev.to/epakconsultant/unleash-the-power-of-the-edge-exploring-supabase-edge-functions-57ga | supabase | In today's fast-paced world, application performance is paramount. Supabase Edge Functions emerge as a game-changer, empowering developers to bring logic and processing power closer to users. This article delves into the world of Supabase Edge Functions, exploring their capabilities and how they can enhance your applications.
Supabase Edge Functions: A Glimpse
Supabase Edge Functions are server-side functions written in TypeScript and deployed globally at the edge of the network, geographically close to your users. This proximity translates to significant benefits:
- Reduced Latency: By processing requests closer to users, Edge Functions minimize the distance data needs to travel, resulting in lightning-fast response times and a noticeably smoother user experience.
- Enhanced Scalability: Supabase handles the global deployment, ensuring your functions can seamlessly scale to accommodate a growing user base without compromising performance.
- Offline Functionality: Leverage Edge Functions for tasks that can be executed locally, even when users are offline. This can significantly improve user experience in situations with limited internet connectivity.
Beyond Speed: Unveiling the Potential
Supabase Edge Functions offer a multitude of functionalities beyond just reducing latency. Here are some compelling use cases:
- Real-Time Data Processing: Process data in real-time as it's received by the Edge Function. This is ideal for scenarios like validating user input, filtering data streams, or triggering actions based on real-time events.
- Authentication and Authorization: Implement robust authentication and authorization logic at the edge, enhancing security and reducing the load on your backend servers.
- Content Personalization: Personalize content for users based on their location, preferences, or other factors. Edge Functions can dynamically tailor the user experience before content reaches the user's device.
- Serverless Integrations: Integrate with third-party services like Stripe or Twilio directly from your Edge Functions. This eliminates the need for complex server-side logic and streamlines integrations.
- Image Optimization: Optimize images on the fly at the edge, reducing bandwidth usage and improving page load times.
Seamless Integration: The Supabase Advantage
Supabase Edge Functions integrate seamlessly with the Supabase ecosystem, offering several advantages:
- Zero-Configuration Deployment: Supabase handles the deployment process, eliminating the need for manual configuration and infrastructure management.
- Direct Database Access: Connect to your Supabase Postgres database directly from your Edge Functions, enabling real-time data access and manipulation.
- Built-in Environment Variables: Supabase automatically provides essential environment variables, including your Supabase project URL and Auth key, simplifying development.
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Getting Started with Supabase Edge Functions
The barrier to entry for Supabase Edge Functions is refreshingly low. Here's how to embark on your exploration:
- Prerequisites: Ensure you have Node.js and the Supabase CLI installed.
- Project Setup: Use the Supabase CLI to create a new Edge Function project.
- Write Your Function: Develop your function logic in TypeScript, leveraging the Supabase Javascript client for database interactions if needed.
- Deploy and Test: Deploy your function with the Supabase CLI and test it using tools like Postman or Supabase itself.
The Future of Edge Computing
Supabase Edge Functions represent a significant step forward in application development. By harnessing the power of the edge, developers can create applications that are faster, more scalable, and deliver a superior user experience. As edge computing continues to evolve, Supabase Edge Functions are poised to play a pivotal role in building the next generation of high-performance applications.
Ready to Explore?
Supabase Edge Functions offer a compelling solution for developers seeking to enhance their applications. With their ease of use, powerful capabilities, and seamless integration with the Supabase ecosystem, they are well worth exploring. So, why not leverage the power of the edge and see how Supabase Edge Functions can elevate your application development journey? | epakconsultant |
1,900,861 | Several recommended practices for writing good asynchronous JavaScript code | Introduction Asynchronous programming in JavaScript is crucial for building efficient and... | 0 | 2024-06-26T05:04:36 | https://dev.to/safdarali/several-recommended-practices-for-writing-good-asynchronous-javascript-code-1oc1 | webdev, javascript, async, programming | ## Introduction
Asynchronous programming in JavaScript is crucial for building efficient and responsive web applications. However, improper use of asynchronous constructs can lead to performance issues and hard-to-debug errors. Here are several best practices to help you write better asynchronous JavaScript code.
## Avoid Using async in the Promise Constructor
## Bad Practice
```
// ❌
new Promise(async (resolve, reject) => {});
```
## Good Practice
```
// ✅
new Promise((resolve, reject) => {});
```
## Explanation:
Using async within the Promise constructor can lead to unnecessary wrapping of Promises. Additionally, if an async function inside the Promise constructor throws an exception, the constructed Promise will not reject, making it impossible to catch the error. Instead, use a regular function and handle the asynchronous operations within it.
## Avoid await Inside Loops
**Bad Practice**
```
// ❌
for (const url of urls) {
const response = await fetch(url);
}
```
**Good Practice**
```
// ✅
const responses = [];
for (const url of urls) {
const response = fetch(url);
responses.push(response);
}
await Promise.all(responses);
```
**Explanation:**
Using await inside a loop can prevent JavaScript from fully leveraging its event-driven nature. This approach executes fetch requests sequentially, which can be slow. Instead, initiate all fetch requests concurrently and use Promise.all to wait for their completion, significantly improving execution efficiency.
## Do Not Return From the Promise Constructor Function
It is not recommended to return a value from the Promise constructor function, as the value returned will be ignored and can cause confusion in the codebase.
**Bad Practice**
```
// ❌
new Promise((resolve, reject) => {
return someValue;
});
```
**Good Practice**
```
// ✅
new Promise((resolve, reject) => {
resolve(someValue);
});
```
**Explanation:**
Returning a value from the Promise executor function does not have any effect. Instead, use resolve to fulfill the promise with the intended value.
## Use try...catch for Error Handling in async Functions
Proper error handling is critical in asynchronous code to ensure that your application can gracefully handle failures.
**Good Practice**
```
async function fetchData(url) {
try {
const response = await fetch(url);
if (!response.ok) {
throw new Error('Network response was not ok');
}
const data = await response.json();
return data;
} catch (error) {
console.error('Fetch error:', error);
// Handle the error appropriately
}
}
```
**Explanation:**
Using try...catch blocks within async functions allows you to handle errors gracefully, ensuring that unexpected issues do not crash your application.
## Avoid Creating Unnecessary Promises
Creating unnecessary promises can add complexity and reduce the readability of your code.
**Bad Practice**
```
// ❌
async function example() {
return new Promise(async (resolve) => {
const result = await someAsyncFunction();
resolve(result);
});
}
```
**Good Practice**
```
// ✅
async function example() {
return await someAsyncFunction();
}
```
**Explanation:**
If you are already working within an async function, there is no need to wrap another async function in a Promise. The async keyword automatically returns a promise.
## Conclusion
By adhering to these best practices, you can write more efficient, readable, and maintainable asynchronous JavaScript code. Avoid using async within Promise constructors, refrain from using await inside loops, ensure proper error handling, and prevent the creation of unnecessary promises. These guidelines will help you leverage the full potential of JavaScript’s event-driven architecture, resulting in better-performing applications.
That's all for today.
And also, share your favourite web dev resources to help the beginners here!
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Thanks for 22525! 🤗
| safdarali |
1,900,860 | 5 Best Practices for Responsive Web Design | One of the major shifts in the web development industry is the move towards responsive web design.... | 0 | 2024-06-26T05:04:35 | https://dev.to/joywinter90/5-best-practices-for-responsive-web-design-1k40 | webdev, devops, design, php | One of the major shifts in the web development industry is the move towards responsive web design. With a wide array of devices used by consumers nowadays, designing websites to consider multiple devices has become necessary.
Websites need to adapt to various devices and display sizes while providing an optimal user experience. In line with this, responsive web design is no longer optional but the standard.
Today, I’ll share some responsive web design best practices that have been recommended by industry experts.
Let’s explore.
## 5 Best Practices for Responsive Web Design
Here are the top responsive web design best practices to help you build a proper website.
## 1. Take a Mobile-First Approach
This is one of the most helpful and innovative practices when it comes to web design. While you may need to optimize your design for larger screens eventually, start with the smallest screens first.
Why should you do this? The answer is simple. Mobile traffic is way higher than desktop traffic. According to a [study](https://www.statista.com/statistics/218984/number-of-global-mobile-users-since-2010/), the number of mobile users is projected to increase to about 7.41 billion in 2024.
You need to create and optimize your website for mobile devices. Creating a mobile-optimized website requires professional web techniques, and you can hire a professional custom web development company such as [SoloWay Tech](https://soloway.tech/) to develop mobile-optimized websites for your businesses.
With mobile users expecting a seamless experience on their devices, mobile-friendliness should be your priority. A [mobile-first website design](https://dev.to/alisabaj/mobile-first-design-what-it-is-why-it-matters-and-how-to-incorporate-it-1am3) involves prioritizing website features and content for mobile devices. After doing this, you can then scale up for larger screens.
Start with a simple layout that’s perfectly suited for a mobile device. With this approach, you’re more likely to detect and address potential challenges that web designers face.
Here’s an example of a mobile-friendly responsive web design. With its simple layout, Shopify’s mobile page is easily readable.
Image via [Shopify](http://Shopify.com)
Also, tools like the Google Mobile-Friendly Test can help you test how mobile-friendly your website is.
If you’re running an Instagram page, you can also leverage the power of [Instagram web apps](https://keyhole.co/blog/top-instagram-web-apps/) for analyzing user engagement and optimizing content presentation.
Then, ensure smooth navigation, with simple layouts and large but easily clickable website elements.
## 2. Emphasize Flexibility
Flexibility is one of the main focus points when it comes to responsive web design best practices. The text and sections on your website should be able to fit various screen sizes.
For flexibility, I’d recommend ditching fixed-width layouts in favor of fluid grids. With flexible grid layouts, the content flows naturally and can easily adjust to multiple screen sizes.
How do you achieve this? You can use a combo of [CSS Grid](https://dev.to/shahednasser/css-grid-tutorial-for-beginners-32dp) or Flexbox and percentage-based widths to create flexible and responsive grid layouts. This ensures your website elements scale proportionally on various screens.
In addition to using CSS Grid or Flexbox, you can apply media queries to adjust margins, font sizes, and padding at different breakpoints for optimal responsiveness.
## 3. Optimize Images and Media Elements
Images are a central feature of many websites. That’s why one of the responsive web design best practices is ensuring images and media elements don’t interfere with performance.
For instance, a website created to [sell online courses](https://mirasee.com/pillar/sell-online-courses/) will include numerous media elements. While high-resolution images and large-size media elements can look appealing to users, they can slow down loading speed.
This happens especially on devices with slower internet speeds. To solve this, I’d recommend the use of [responsive images](https://dev.to/mustapha/responsive-images-for-better-performance-start-using-srcset-and-picture-11kc) with the ‘srcset’ attribute.
This allows you to determine different image sizes for screen resolutions. Using this, the user’s browser will choose the best image size based on the device they’re using.
Also, CSS techniques such as ‘max-width: 100%’ help to scale down images on smaller screens. However, on larger screens, you can scale images to higher resolutions.
## 4. Use Fluid Typography
This is a crucial part of web design as written text is one of the primary ways users interact with your content. You’d want to ensure they can easily view text regardless of the type of device they’re using.
That said, using a fixed font size can lead to poor readability as it can make the text appear either too tiny or too large on different screens.
This is why you shouldn’t go less than 16px as the minimum font size to ensure readability. However, the text can be larger under certain headings or columns.
To achieve a consistent experience across various devices, you can use two relative units for your fonts: [‘em’ and ‘rem’](https://dev.to/holdmypotion/em-v-s-rem-k8l), instead of fixed ‘px’ units. Using EM units, you can scale the font up or down based on the parent element’s font size.
REM units are based on the HTML instead of the parent element. With both relative units, the text on your website will adapt to the text size on various browsers. This is especially great for users with visual impairments.
Check out the text on Apple’s website for example.
Image via [Apple](https://support.apple.com/?cid=gn-ols-home-hp-tab)
## 5. Test on Multiple Devices
After implementing the responsive web design best practices, it’s important to conduct periodic testing to see how it looks across various devices and browsers.
Tools like Responsinator and BrowserStack lets you simulate your website’s look on different screen sizes and devices.
I’d also advise you to manually test your website’s responsiveness on actual devices to get more accurate data.
If you’re a fan of productivity tools, you might want to check out some of the [best Chrome extensions](https://engage-ai.co/the-top-5-chatgpt-google-chrome-extensions/) for web developers. These can assist during the testing phases, making your workflow more efficient.
When testing for multiple devices, consider factors like image optimization, page speed, navigation, form accessibility, and security. Additionally, when [adding Google reviews to your Shopify store](https://tagshop.ai/blog/how-to-add-google-reviews-to-shopify/) to improve your credibility, make sure that it can be viewed seamlessly across all types of devices.
## Put These Tips to Use
Responsive web design is a necessity and not just a trend. With a mobile-first approach, flexibility, optimized images and media, and fluid typography, you can provide a smooth experience for users.
Don’t forget to test your website’s responsiveness frequently while considering the important parameters.
If you have questions, feel free to ask me in the comments.
| joywinter90 |
1,900,859 | Demystifying OAuth 2.0: A Guide to Secure User Authentication | In today's interconnected world, applications often rely on user data from external sources. OAuth... | 0 | 2024-06-26T05:03:24 | https://dev.to/epakconsultant/demystifying-oauth-20-a-guide-to-secure-user-authentication-1iaa | oauth | In today's interconnected world, applications often rely on user data from external sources. OAuth 2.0 emerges as a secure and standardized protocol for authorization, allowing users to grant access to their information without sharing their credentials directly. This article unpacks the core concepts of OAuth 2.0 and guides you through its implementation process.
Understanding the Actors:
- Resource Owner: The end-user who owns the data being accessed.
- Client Application: The application requesting access to the user's data.
- Authorization Server: The server responsible for authenticating the user and issuing access tokens.
- Resource Server: The server that stores the user's data and validates access tokens issued by the authorization server.
The OAuth 2.0 Dance:
OAuth 2.0 follows a well-defined authorization flow, often referred to as the "dance." Here's a breakdown of the key steps:
1. User Initiates Request: The user attempts to access a specific resource within the client application.
2. Redirect to Authorization Server: The client application redirects the user to the authorization server's login page.
3. User Authentication: The user logs in with their credentials on the authorization server.
4. Consent Grant: If successful, the authorization server presents the user with a consent screen, outlining the data the client application is requesting access to. The user grants or denies consent.
5. Authorization Code Grant: Upon consent, the authorization server redirects the user back to the client application with an authorization code.
6. Token Request: The client application sends a request to the authorization server, exchanging the authorization code for an access token and (optionally) a refresh token. These tokens act as secure keys to access the user's data.
7. Access Resource Server: The client application includes the access token in its request to the resource server, which validates the token and grants access to the requested data if valid.
Benefits of OAuth 2.0:
- Enhanced Security: Users don't share their credentials directly with client applications, minimizing security risks.
- Improved User Experience: Users can log in once to access multiple applications using the same provider.
- Scalability and Standardization: OAuth 2.0 is a widely adopted protocol, making it easy to integrate with various platforms and services.
[How to Create Your First Token On BSC network: Beginer Guide to Creating Tokens on BSC Network](https://www.amazon.com/dp/B0CGB2BN87)
Implementing OAuth 2.0:
The specific implementation process can vary depending on the chosen libraries and frameworks. Here's a general outline:
1. Choose an OAuth Provider: Select an established OAuth provider like Google, Facebook, or Auth0. These providers offer APIs and documentation to simplify integration.
2. Register Your Application: Create an application on the chosen provider's platform and obtain your Client ID and Client Secret. These credentials are used for authentication between your client application and the provider.
3. Authorization Flow Integration: Integrate the authorization flow into your client application. This typically involves redirecting users to the provider's login page and handling authorization code exchange for access tokens.
4. Secure Token Storage: Store access tokens securely within your application. Avoid storing them directly in user sessions or client-side code.
5. Resource Server Access: Include the access token in your requests to the resource server to access user data.
Libraries and Frameworks:
Several libraries and frameworks can simplify OAuth 2.0 implementation for various programming languages and platforms. Here are some popular options:
- Node.js: Passport.js, OAuth2-client
- Python: python-oauth2
- Java: Spring Security OAuth
- Mobile Development: Platform-specific libraries like Google Sign-In for Android or iOS Authentication with Apple
Remember:
- Security Best Practices: Always follow secure coding practices when handling access tokens.
- Error Handling: Implement robust error handling to gracefully handle authorization failures and revoke access tokens when necessary.
- Stay Updated: OAuth 2.0 is an evolving standard. Keep yourself updated on the latest specifications and security considerations.
By understanding the core concepts and following a secure implementation approach, you can leverage OAuth 2.0 to build robust and user-friendly authentication experiences for your applications.
| epakconsultant |
1,900,858 | How to Create a Web Form in 3 Steps | Create a Web Form Using Five's Online Web Form Generator In this article, we explain the three steps... | 0 | 2024-06-26T05:02:27 | https://five.co/blog/how-to-create-a-web-form-in-3-steps/ | webdev, form, database, data | <!-- wp:heading -->
<h2 class="wp-block-heading">Create a Web Form Using Five's Online Web Form Generator</h2>
<!-- /wp:heading -->
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<p>In this article, we explain the three steps required to build and launch a web form using Five's rapid application development environment. </p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>The steps are:</p>
<!-- /wp:paragraph -->
<!-- wp:list {"ordered":true} -->
<ol><!-- wp:list-item -->
<li>Create the database,</li>
<!-- /wp:list-item -->
<!-- wp:list-item -->
<li>Add your form, and</li>
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<!-- wp:list-item -->
<li>Launch of the web form.</li>
<!-- /wp:list-item --></ol>
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<p>Last, we will map out the steps to secure a web form through logins, authentications, and permissions.</p>
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<hr class="wp-block-separator has-alpha-channel-opacity"/>
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<pre style="text-align: center; overflow: hidden; white-space: pre-line;"><span style="color: #f1ebda; background-color: #4588d8; font-size: calc(18px + 0.390625vw);"><strong>Build a Web Form on a Custom Database<br></strong><span style="font-size: 14pt;">Check out Five's online web form generator</span></span></pre>
<p style="text-align: center;"><a href="https://five.co/get-started/" target="_blank" rel="noopener"><button style="background-color: #f8b92b; border: none; color: black; padding: 20px; text-align: center; text-decoration: none; display: inline-block; font-size: 18px; cursor: pointer; margin: 4px 2px; border-radius: 5px;"><strong>Get Instant Access</strong></button><br></a></p>
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<h3 class="wp-block-heading">Step 1: Create Your Web Form's Database</h3>
<!-- /wp:heading -->
<!-- wp:paragraph -->
<p>To do so, access Five, and create a new application by clicking on <strong>Applications (in the top left corner, just under the hamburger icon) >> Yellow Plus </strong>button.</p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>To create a web form, we must first create a database that stores responses. </p>
<!-- /wp:paragraph -->
<!-- wp:image {"align":"center","id":3014,"sizeSlug":"full","linkDestination":"none"} -->
<figure class="wp-block-image aligncenter size-full"><img src="https://five.co/wp-content/uploads/2024/06/Five.Co-Yellow-Plus-Button-Create-a-New-Application-1024x649-1.png" alt="Five.Co - Create a New App by Clicking the Yellow Plus Button" class="wp-image-3014"/><figcaption class="wp-element-caption"><em>Click the yellow plus button to create a new application.</em></figcaption></figure>
<!-- /wp:image -->
<!-- wp:separator -->
<hr class="wp-block-separator has-alpha-channel-opacity"/>
<!-- /wp:separator -->
<!-- wp:paragraph -->
<p>Next up,</p>
<!-- /wp:paragraph -->
<!-- wp:list {"ordered":true} -->
<ol><!-- wp:list-item -->
<li>Give your application a <strong>Title</strong>, such as My First App or Web Form. </li>
<!-- /wp:list-item -->
<!-- wp:list-item -->
<li>Click on the ☑️ <strong>tick icon </strong>in the upper right corner.<br>You will now see a <strong>blue Manage </strong>button in the upper right corner.</li>
<!-- /wp:list-item -->
<!-- wp:list-item -->
<li>Click on <strong>Manage </strong>to enter the Five development environment.</li>
<!-- /wp:list-item --></ol>
<!-- /wp:list -->
<!-- wp:image {"id":3018,"sizeSlug":"large","linkDestination":"none"} -->
<figure class="wp-block-image size-large"><img src="https://five.co/wp-content/uploads/2024/06/Five.Co-Manage-Your-Application-1024x576.png" alt="Five.Co - Click on Manage to Start Building the Northwinds Application" class="wp-image-3018"/></figure>
<!-- /wp:image -->
<!-- wp:separator -->
<hr class="wp-block-separator has-alpha-channel-opacity"/>
<!-- /wp:separator -->
<!-- wp:paragraph -->
<p>Next, click on <strong>Data > Table Wizard.</strong> Five's table wizard is a point-and-click interface for creating database table.</p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>Here is where to find the table wizard:</p>
<!-- /wp:paragraph -->
<!-- wp:image {"id":2991,"sizeSlug":"full","linkDestination":"none"} -->
<figure class="wp-block-image size-full"><img src="https://five.co/wp-content/uploads/2024/06/Five.Co-Table-Wizard-1024x649-1.png" alt="Five.Co - Table Wizard" class="wp-image-2991"/></figure>
<!-- /wp:image -->
<!-- wp:separator -->
<hr class="wp-block-separator has-alpha-channel-opacity"/>
<!-- /wp:separator -->
<!-- wp:list {"ordered":true} -->
<ol><!-- wp:list-item -->
<li>Fill in the <strong>Name</strong> field to give your database table a name. Choose something descriptive. For example, if you plan to collect information about Recipes call your database table Recipe. </li>
<!-- /wp:list-item -->
<!-- wp:list-item -->
<li>Click on the <strong>Plus icon </strong>on the right and towards the center of the screen. This plus button adds database fields to your table. Add as many fields as you need. </li>
<!-- /wp:list-item --></ol>
<!-- /wp:list -->
<!-- wp:image {"id":2992,"sizeSlug":"full","linkDestination":"none"} -->
<figure class="wp-block-image size-full"><img src="https://five.co/wp-content/uploads/2024/06/Five.Co-Excel-to-Web-App-Database-Fields-1024x626-1.png" alt="Five.Co - Table Wizard - Adding Fields
" class="wp-image-2992"/></figure>
<!-- /wp:image -->
<!-- wp:paragraph -->
<p>For example, shown above is a table that has four fields for products, prices, quantities, and a total sum. As you can see, for the price and total field, we are expecting to store floats, or numeric values that are not an integer. For quantity, on the other hand, we are expecting integers. Last, our product field is a simple text field in our web form. </p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>The <em>display </em>types reflect our choice of <em>data </em>type. _Float.2 indicates that we expect two decimals for our price and total fields.</p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>Make sure to select the appropriate <strong>data and display types for the data you are dealing with. </strong></p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>As a recap: data types define how your database stores records. Display types define how you your data is displayed to users inside your form. Five comes with a great library of prebuilt display types, such as ratings, images, floats, or currency.</p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>Last, save by clicking the ☑️ <strong>tick icon </strong>in the upper right corner. </p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>We have now created a single-table MySQL database that is ready to store information from our form.</p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>Now, let's move on to Step 2, adding forms to our database.</p>
<!-- /wp:paragraph -->
<!-- wp:separator -->
<hr class="wp-block-separator has-alpha-channel-opacity"/>
<!-- /wp:separator -->
<!-- wp:heading {"level":3} -->
<h3 class="wp-block-heading">Step 2: Creating the Web Form</h3>
<!-- /wp:heading -->
<!-- wp:list {"ordered":true} -->
<ol><!-- wp:list-item -->
<li>Go to <strong>Visual >> Form Wizard </strong>in Five.</li>
<!-- /wp:list-item -->
<!-- wp:list-item -->
<li>Click on the dropdown box inside the Form Wizard's General section, and select as your main data source the database table that you have just created.<br>This step is important: it brings together your back end, the database, with the web form, your front end.</li>
<!-- /wp:list-item -->
<!-- wp:list-item -->
<li>Click on the ☑️ <strong>tick icon </strong>in the upper right corner, as shown here:</li>
<!-- /wp:list-item --></ol>
<!-- /wp:list -->
<!-- wp:image {"id":2092,"sizeSlug":"large","linkDestination":"none"} -->
<figure class="wp-block-image size-large"><img src="https://five.co/wp-content/uploads/2023/08/Five.Co-Form-Wizard-Creating-a-form-1024x656.png" alt="Five.Co - Form Wizard - Creating a form" class="wp-image-2092"/></figure>
<!-- /wp:image -->
<!-- wp:separator -->
<hr class="wp-block-separator has-alpha-channel-opacity"/>
<!-- /wp:separator -->
<!-- wp:paragraph -->
<p>Our form is done. Let's move on to step 3: launching the web form.</p>
<!-- /wp:paragraph -->
<!-- wp:separator -->
<hr class="wp-block-separator has-alpha-channel-opacity"/>
<!-- /wp:separator -->
<!-- wp:heading {"level":3} -->
<h3 class="wp-block-heading">Step 3: Launching the Web Form</h3>
<!-- /wp:heading -->
<!-- wp:paragraph -->
<p>To launch your web form, click on the "Deploy to Development" button in the top right corner. This opens up your app in a new browser tab.</p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>We have now created our first prototype web form. To add more features, consider adding a <a href="http://five.co/themes">theme</a> to the web form. </p>
<!-- /wp:paragraph -->
<!-- wp:separator -->
<hr class="wp-block-separator has-alpha-channel-opacity"/>
<!-- /wp:separator -->
<!-- wp:heading -->
<h2 class="wp-block-heading">How to Secure a Web Form: Logins, Authentication, Permissions</h2>
<!-- /wp:heading -->
<!-- wp:paragraph -->
<p>Five's form creator lets you build an online form quickly. In addition to its database modeling and form creation features, Five also lets you create different user roles with unique permissions to a form.</p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>To add user roles or logins to your application, turn your application into a <a href="https://help.five.org/2.5/docs/applications/adding-managing-applications/">multi-user application</a>. This automatically adds a login screen to your application.</p>
<!-- /wp:paragraph -->
<!-- wp:paragraph -->
<p>Once users are required to login to the app, you can also add different user roles. For example, you could create one user role that can only submit forms. Another user role, on the other hand, can access a dashboard that summarizes responses from your form. To learn more about Five, <a href="http://help.five.org">visit our documentation here.</a></p>
<!-- /wp:paragraph --> | domfive |
1,900,857 | How to Save Image with Multer | Introduction There is usually a user image-saving feature in any web app with user login... | 0 | 2024-06-26T05:00:49 | https://dev.to/md_enayeturrahman_2560e3/how-to-save-image-with-multer-j74 | ### Introduction
- There is usually a user image-saving feature in any web app with user login functionality. The flow is as follows: We receive the user image from the front end through the request body. We use Multer at the backend to save the file in a temporary folder on the server. From the folder, we save the image to Cloudinary or ImageBB, etc., and get a link. Then, we save the link into our database.
- Below, all the processes will be explained step by step.
### Install multer and cloudinary
- Run the following command in the server terminal:
```javascript
npm i multer cloudinary
```
### Getting necessary config data from the cloudinary
- Go to the cloudinary account. [Cloudinary](https://cloudinary.com)
- Sign up or log in.
- On the left side, there are icons. If you hover over the second icon, it will display "Programmable Media." Click it. You will see a dashboard like the following image.
- Click the "Go to API Keys" button at the top right corner.
- Now click the "Generate New API Keys" button.
- A new window will appear like the following image. Check your email. You will receive a code. Copy it, paste it here, and click the approve button.
- Now you will see a new API key and secret added to the dashboard. At the top of the page, you will see "API Keys: Cloud name:..." copy it. In the lower middle of the image, you will see the API Key column under which you see the API key. Copy it. Click the eye button beside the API secret. A password verification window will appear. Go to your email; a new verification code will be sent there. Copy that, paste it here, and click the approve button.
- Now you will see that the secret is visible as follows. Copy that.
- Now put the cloud name, api key and api secret in the .env file of your project.
### utils file
- Below is the code of the utils file where the file storage using Multer, the file upload function to Cloudinary, and the file delete function from the folder are mentioned.
```javascript
import { UploadApiResponse, v2 as cloudinary } from 'cloudinary'; // Importing cloudinary for upload photo
import fs from 'fs'; // This will be required for file delete from temporary folder
import multer from 'multer'; // Multer import
import config from '../config'; // Importing config file so that the environmental variable can be used
// The config function set the cloud name, api key and secret from the config file.
cloudinary.config({
cloud_name: config.cloudinary_cloud_name,
api_key: config.cloudinary_api_key,
api_secret: config.cloudinary_api_secret,
});
// This is custom-made function that is responsible for uploading the image and after that deleting it.
export const sendImageToCloudinary = (
imageName: string, // this is the name that will be used to save the image in the cloudinary
path: string, // this is the path from where the file will be uploaded to the cloudinary.
): Promise<Record<string, unknown>> => {
return new Promise((resolve, reject) => { // Cloudinary does not provide async function so this custom make Promise is created to perform async task
cloudinary.uploader.upload( // function provided by cloudinary to upload image
path, // This is the path from where image will be uploaded. It is received through params.
{ public_id: imageName.trim() }, // This is the image name that is received through params.
function (error, result) {
if (error) {
reject(error); // If any error occur during upload that time the promise rejected.
}
resolve(result as UploadApiResponse); // If upload is successful that time the result is returned.
// delete a file asynchronously
fs.unlink(path, (err) => { // This function will delete the file from the temporary folder. It takes path as a params.
if (err) {
console.log(err);
} else {
console.log('File is deleted.');
}
});
},
);
});
};
const storage = multer.diskStorage({ // This is the multer function to save the image received from the frontend to the temporary folder.
destination: function (req, file, cb) { // this function is responsible for saving file into temporary folder.
cb(null, process.cwd() + '/uploads/'); // I named the temporary folder as uploads.
},
filename: function (req, file, cb) {
const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1e9); // This variable is holding the unique name of the file that will be stored in the uploads folder based on date adn some random number.
cb(null, file.fieldname + '-' + uniqueSuffix);
},
});
export const upload = multer({ storage: storage });
```
### Routes File to Receive Data from the Frontend
- Below is the router.ts file that define the route and validate request.
```javascript
/* eslint-disable @typescript-eslint/no-explicit-any */
import express, { NextFunction, Request, Response } from 'express'; // Types imported from express
import validateRequest from '../../middlewares/validateRequest'; // Middleware function to validate data received from request
import { upload } from '../../utils/sendImageToCloudinary'; // Importing upload from utils that we created earlier.
import { createStudentValidationSchema } from '../Student/student.validation'; // Zod schema for validating data received from the frontend.
import { UserControllers } from './user.controller'; //
const router = express.Router();
router.post(
'/create-student', // route name
upload.single('file'), // Getting single file. you have to use the name 'file' at the frontend at the time of sending image.
(req: Request, res: Response, next: NextFunction) => { // Custom middleware. Usually from the frontend data passed to the backend in json format. But if you want to send image then you cannot send it json format. YOu have to use form-data, in the form data option you can send text as text format not json. This middleware is taking the text data from the req.body and converting it into json data and then assigning it again to the rew.body so that next middleware can use this json data to validate the data using zod.
req.body = JSON.parse(req.body.data);
next();
},
validateRequest(createStudentValidationSchema), // Middleware to validate data using zod.
UserControllers.createStudent, // Passing the data to the controller.
);
```
### Controller function
- The controller function takes data from the route, passes it to the service function, and also receives data from the service function to send a response to the frontend.
```javascript
import httpStatus from 'http-status'; // Packaged used for getting the status code
import catchAsync from '../../utils/catchAsync'; // Custom made catchAsync function to remove the use of try catch block
import sendResponse from '../../utils/sendResponse'; // Custom made send response function.
import { UserServices } from './user.service'; // Service function
const createStudent = catchAsync(async (req, res) => {
const { password, student: studentData } = req.body; // Getting data from the req.body
const result = await UserServices.createStudentIntoDB( // calling the service function and passing the file, password and data.
req.file,
password,
studentData,
);
// Sending response to the frontend.
sendResponse(res, {
statusCode: httpStatus.OK,
success: true,
message: 'Student is created succesfully',
data: result,
});
});
```
### Service function function
- This service function is responsible for saving user data into the database and calling the Cloudinary function.
```javascript
import { sendImageToCloudinary } from '../../utils/sendImageToCloudinary';
import { TStudent } from '../Student/student.interface';
import { Student } from '../Student/student.model';
import { TUser } from './user.interface';
import { User } from './user.model';
import { generateStudentId} from './user.utils';
const createStudentIntoDB = async ( // Getting param from the controller
file: any,
password: string,
payload: TStudent,
) => {
// create a user object
const userData: Partial<TUser> = {}; // Creating a new object
//set student role
userData.role = 'student'; // Adding role to the userData object.
// set student email
userData.email = payload.email; // Adding email to the userData object.
//set generated id
userData.id = await generateStudentId(admissionSemester); // Generating id and adding to the userData object.
if (file) {
const imageName = `${userData.id}${payload?.name?.firstName}`; // Creating file name from the user data.
const path = file?.path; // Storing file path to path variable
//send image to cloudinary
const { secure_url } = await sendImageToCloudinary(imageName, path); // Passing image name and path to the cloudinary function and getting secure url.
userData.profileImg = secure_url as string; // Adding secure_url to the profile image
}
const result = await Student.create(userData) // Creating new document in the Student collection.
return result
};
```
### Conclusion
- One important point to mention you cannot use it in free vercel host. Because it does not allow to add temporary folder in the free instance. So you can check it in the localhost or using paid server.
- Feel free to contact me at [linkedin](https://www.linkedin.com/in/md-enayetur-rahman) | md_enayeturrahman_2560e3 | |
1,900,855 | Delving into the World of Dart: A Versatile Language for Modern App Development | In the ever-evolving landscape of programming languages, Dart stands out as a powerful and versatile... | 0 | 2024-06-26T04:54:44 | https://dev.to/epakconsultant/delving-into-the-world-of-dart-a-versatile-language-for-modern-app-development-17gd | dart | In the ever-evolving landscape of programming languages, Dart stands out as a powerful and versatile option for building modern applications. Developed by Google, Dart boasts a unique blend of features that cater to developers of all levels. Whether you're a seasoned coder or just starting your programming journey, Dart offers a compelling development experience.
Key Characteristics of Dart:
- Object-Oriented: Dart adheres to object-oriented programming (OOP) principles. This means you can structure your code around objects, promoting reusability, maintainability, and better code organization.
- Strongly Typed: Dart is a statically typed language, ensuring type safety. This helps catch errors early in the development process, leading to more robust and reliable applications. However, Dart also offers flexibility with dynamic typing when needed.
- AOT Compilation: Dart code can be compiled ahead-of-time (AOT) into native machine code, resulting in highly performant applications. This is a significant advantage, especially for mobile development where responsiveness is crucial.
- Hot Reload: Experience the magic of instant updates with hot reload. This feature allows you to see changes in your code reflected in the running application almost instantaneously, streamlining the development workflow.
- Asynchronous Programming: Dart excels at handling asynchronous operations, making it perfect for building user interfaces that remain responsive even when dealing with network requests or other long-running tasks.
Benefits of Using Dart:
- Fast Development: The combination of hot reload and a clean syntax makes development in Dart a breeze. You can iterate quickly and experiment with different approaches without spending hours waiting for code to compile and refresh.
- Cross-Platform Development: While Dart is not strictly a cross-platform language itself, it pairs beautifully with frameworks like Flutter that enable you to build apps for both iOS and Android with a single codebase.
- Large and Active Community: Backed by Google and a growing developer community, Dart offers a wealth of resources, tutorials, and libraries to support your development journey.
- Modern and Feature-Rich: Dart is a constantly evolving language, with new features and improvements being added regularly. This ensures your code stays up-to-date with the latest advancements in the programming world.
Exploring Dart's Applications:
Dart's versatility shines in various development domains:
- Mobile App Development: As mentioned earlier, Dart forms the foundation of Flutter, a popular framework for building beautiful and high-performance mobile applications.
- Web Development: Dart can be transpiled to JavaScript, allowing you to develop web applications that leverage its features while running seamlessly in web browsers.
- Server-Side Development: With frameworks like Aqueduct and shelf, Dart can be used to build robust and scalable server-side applications.
- Command-Line Tools and Scripts: Dart's clean syntax and powerful features make it well-suited for crafting efficient command-line tools and scripts to automate tasks.
Getting Started with Dart:
Learning Dart is a rewarding experience. Here are some resources to kickstart your journey:
Delving into the World of Dart: A Versatile Language for Modern App Development
In the ever-evolving landscape of programming languages, Dart stands out as a powerful and versatile option for building modern applications. Developed by Google, Dart boasts a unique blend of features that cater to developers of all levels. Whether you're a seasoned coder or just starting your programming journey, Dart offers a compelling development experience.
Key Characteristics of Dart:
Object-Oriented: Dart adheres to object-oriented programming (OOP) principles. This means you can structure your code around objects, promoting reusability, maintainability, and better code organization.
Strongly Typed: Dart is a statically typed language, ensuring type safety. This helps catch errors early in the development process, leading to more robust and reliable applications. However, Dart also offers flexibility with dynamic typing when needed.
AOT Compilation: Dart code can be compiled ahead-of-time (AOT) into native machine code, resulting in highly performant applications. This is a significant advantage, especially for mobile development where responsiveness is crucial.
Hot Reload: Experience the magic of instant updates with hot reload. This feature allows you to see changes in your code reflected in the running application almost instantaneously, streamlining the development workflow.
Asynchronous Programming: Dart excels at handling asynchronous operations, making it perfect for building user interfaces that remain responsive even when dealing with network requests or other long-running tasks.
Benefits of Using Dart:
- Fast Development: The combination of hot reload and a clean syntax makes development in Dart a breeze. You can iterate quickly and experiment with different approaches without spending hours waiting for code to compile and refresh.
- Cross-Platform Development: While Dart is not strictly a cross-platform language itself, it pairs beautifully with frameworks like Flutter that enable you to build apps for both iOS and Android with a single codebase.
- Large and Active Community: Backed by Google and a growing developer community, Dart offers a wealth of resources, tutorials, and libraries to support your development journey.
- Modern and Feature-Rich: Dart is a constantly evolving language, with new features and improvements being added regularly. This ensures your code stays up-to-date with the latest advancements in the programming world.
[Beginners Guide: Spot Trading for Various Cryptocurrencies](https://www.amazon.com/dp/B0CG4FC4DY)
Exploring Dart's Applications:
Dart's versatility shines in various development domains:
Mobile App Development: As mentioned earlier, Dart forms the foundation of Flutter, a popular framework for building beautiful and high-performance mobile applications.
Web Development: Dart can be transpiled to JavaScript, allowing you to develop web applications that leverage its features while running seamlessly in web browsers.
Server-Side Development: With frameworks like Aqueduct and shelf, Dart can be used to build robust and scalable server-side applications.
Command-Line Tools and Scripts: Dart's clean syntax and powerful features make it well-suited for crafting efficient command-line tools and scripts to automate tasks.
Getting Started with Dart:
Learning Dart is a rewarding experience. Here are some resources to kickstart your journey:
- Official Dart Website: The official Dart website (https://dart.dev/) offers comprehensive documentation, tutorials, and a getting started guide.
- Interactive Tutorials: Several online platforms provide interactive Dart tutorials that allow you to learn by doing.
- Online Courses: Explore online courses on platforms like Coursera or Udemy to delve deeper into Dart concepts with structured learning paths.
Conclusion:
Dart is a compelling language for modern application development. Whether you're a seasoned developer seeking a productive and versatile language or a beginner looking for a well-structured and approachable option, Dart offers a rewarding development experience. So, dive into the world of Dart and unlock the potential to build amazing applications!
| epakconsultant |
1,900,854 | Django AllAuth Chapter 1 - The All-in-one solution for Auth in Django | After some experimentation in previous articles, now we will build some useful apps with Django. And... | 0 | 2024-06-26T04:52:53 | https://dev.to/doctorserone/django-allauth-chapter-1-the-all-in-one-solution-for-auth-in-django-1dog | django, python, allauth | After some experimentation in previous articles, now we will build some useful apps with Django. And one of the most important aspects of any web app is the user authentication. Django has a pretty useful authentication mechanism, but in this series of articles we will explore a full authentication package: Django AllAuth.
## List of chapters
- Chapter 1 - The All-in-one solution for Auth in Django ←This one!
- Chapter 2 - How to install and configure Django AllAuth
- Chapter 3 - Social login with Django AllAuth
- Chapter 4 - Customizing Django AllAuth UI
- Chapter 5 - Extending Django AllAuth user model with custom fields
## The All-in-one solution for Auth in Django
[Django AllAuth](https://allauth.org/) defines itself as a "Integrated set of Django applications addressing authentication, registration, account management as well as 3rd party (social) account authentication". And is a pretty good definition.
You can read more about Django AllAuth on:
- [It's home page](https://allauth.org/)
- In the [official documentation](https://docs.allauth.org/en/latest/) (very well written and structured)
- In it's [GitHub project page](https://github.com/pennersr/django-allauth)
A very, very interesting project that we will unleash in the core of our Django app in the following chapters.
## What's next
In this series of articles we will learn how to install and configure AllAuth to have a fully working authentication in our Django App. And later, we will customize the default experience of AllAuth components.
Django AllAuth includes:
- Login
- Signup
- Logout
- Password Management
- Password Reset
- Emails Management
- Email Verification
All of these with a rate limit mechanism to prevent brute force attacks. Pretty good, isn't it?
At the end of the series we will know how to:
- Allow users to register in our site, through user/password/email and with social accounts
- Allow users to login in our site, through user/password/email and with social accounts
- Display user profile and allow change and recover it password
Do you want to come with us on this journey?
## About the list
Among the [Python and Docker posts](https://andresalvareziglesias.substack.com/), I will also write about other related topics (always tech and programming topics, I promise... with the fingers crossed), like:
- Software architecture
- Programming environments
- Linux operating system
- Etc.
If you found some interesting technology, programming language or whatever, please, let me know! I'm always open to learning something new!
## About the author
I'm Andrés, a full-stack software developer based in Palma, on a personal journey to improve my coding skills. I'm also a self-published fantasy writer with four published novels to my name. Feel free to ask me anything!
| doctorserone |
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