DEV Community: Ali Sina Yousofi

Anyone hiring

Ali Sina Yousofi — Wed, 31 Jul 2024 07:33:14 +0000

I have applied to at least a 500 jobs and no luck. I have tried every remote jobs possible for full-stack and mobile developer. I did try fiverr but I got no order there at all. I edit and add keywords everyday but again no luck.

Netlify image CDN

Ali Sina Yousofi — Thu, 09 May 2024 07:52:51 +0000

This is a submission for the Netlify Dynamic Site Challenge: Visual Feast.

What I Built

I used the Netlify image CDN to transform image properties, type, and quality of an image. We have custom images and you can also upload your own images to transform(remote and relative path).

Demo

Check the web app here

Platform Primitives

By using Netlify Image CDN you can enhance and server images efficiently. And not bad for transforming basic properties of an image. But after transforming an image we see a decrease in the image quality.

It was individual.

Git Techniques: Best Practices for Version Control

Ali Sina Yousofi — Fri, 19 May 2023 12:29:19 +0000

Introduction

Git is an essential tool for developers and companies because it allows version control, something that is critical in software development. Git makes it easy for developers to track and collaborate on the code, and it keeps the codebase in an organized manner. Git is an incredibly versatile tool, and there are many advanced techniques to make the most of it. In this article, we will discuss the best practices and techniques to use Git effectively.

1. Commit Often and Use Meaningful Messages

When working with Git, it is important to commit early and often. It’s easier to reverse a few changes than to track down which files were edited weeks ago. It’s also important to use descriptive commit messages that explain what has changed. A good commit message should describe the changes done with a short title that is easy to understand followed by a more detailed description if necessary.

2. Use Branches Effectively

Branches are an essential part of Git. They keep the development of different features separate and allow multiple developers to work at the same time. However, it is essential to use them efficiently. Small, well-defined branches are easier to manage than large, complex ones. Developers should frequently merge branches and prioritize features based on importance.

3. Use Git Submodules

Submodules allow developers to include Git repositories within a repository. This is useful when working with dependencies in a project, as the submodule can ensure that a specific version of code is used. Submodules can be tricky to work with, so it is essential to keep them up-to-date and well-organized.

Use Git Hooks

Git hooks are scripts that run automatically when specific events occur, such as before or after a commit. Git hooks can be used to enforce coding standards, run tests, or perform other automated tasks. By using Git hooks, developers can save time and ensure that the codebase is always in a good state.

5. Use Git Rebase Instead of Merge

Rebasing is an alternative to merging. It is a technique that rewrites the history of the branch so that it appears as if the changes were made on the same branch. Rebasing can help to keep the commit history cleaner, but it is important to use it with care. Rebasing can cause conflicts when merging into other branches, so it is essential to test and review the codebase carefully.

6. Use Git Reflog

Reflog is a tool for undoing changes. It keeps a detailed record of all Git’s changes in the repository, and developers can use it to recover previous versions of the code. Reflog is especially helpful if a developer accidentally erases an important branch or makes a mistake that requires a rollback.

7. Use Git Bisect

Git Bisect is a tool that can help to find the commit that introduced a bug in the code. Developers can use Git Bisect to track down the commit in which the bug was introduced by testing the codebase at various points along the way.

8. Use Git LFS

Git LFS (large file storage) is a tool that tracks large files and stores them in a separate location. This is useful for developers who are working on projects that require large data files. By using Git LFS, developers can keep the file size down and ensure that the codebase is not cluttered with large files.

Conclusion

Git is a critical tool for developers, and these advanced techniques can help them to make the most of it. By using Git efficiently and effectively, developers can keep the codebase clean, ensure that dependencies are managed well, and collaborate seamlessly on multiple features. Utilizing Git’s powerful features can greatly improve workflow and improve code quality.

Closures in javascript

Ali Sina Yousofi — Sun, 14 May 2023 15:01:04 +0000

Introduction

JavaScript closures are essential but sometimes confusing concepts in the JavaScript language. Understanding closures can help you write more efficient code and become a better JavaScript developer.

Closures are created when a function is defined inside another function, and the inner function refers to the variables declared in the outer function's scope chain. In other words, a closure is created when an inner function has access to the variables of an outer function.

Note

Whenever a function is created in JavaScript, it's automatically a closure.

In this blog, we'll explore what closures are, how they work, and provide code examples to help you better understand them.

Concepts of closures

To understand closures conceptually, we need to understand two main concepts: variable scope and the execution stack.

Variable scope

Variable scope in JavaScript determines which variables are accessible at any given time or from any given place.

When a variable is declared inside a function, it is said to be in the function's scope, which means other functions outside of that scope cannot access the variable.

Here is an example:

The code logs "Chloe" because the inner function innerScope has access to the variable name declared in the outer function scopeExample.

Execution stack

The execution stack is a stack data structure that JavaScript uses to organize and keep track of the order in which functions are called.

Each time a function is called, it is added to the top of the stack. When the function completes execution, it is removed from the stack.

Here's an example to illustrate how functions are added and removed from the execution stack:

The output is:

Inside first function
Inside second function

This happens because firstFunction is called first, and then it calls secondFunction. When secondFunction completes execution, it is removed from the stack, and then firstFunction completes execution and is removed from the stack.

Now that we have covered variable scope and the execution stack, let's dive into closures.

How closures work

Closures are created when an inner function has access to the variables of an outer function even after the outer function has completed execution and been removed from the stack.

Consider the following code:

The outerFunction function returns a reference to the innerFunction. We store this reference in a variable myName.

myName now has access to the name variable declared in outerFunction even though outerFunction has completed execution and has been removed from the stack.

This is because JavaScript maintains a reference to the name variable in the closure of innerFunction. A closure is created when innerFunction is defined inside outerFunction, and innerFunction has access to variables in outerFunction.

Examples of closures

Here are a few examples of how closures are used in real-world JavaScript code.

Example 1: Private variables

Closures are often used to create private variables in JavaScript.

In this example, login and logout functions have access to the variables username and password, but these variables cannot be accessed from outside the user function.

This means that username and password are private variables. login and logout can use them but cannot be accessed from outside the user function.

Creating event listener

Closures are frequently used in event listeners.

In this example, the init function has access to the button variable. The addEventListener function creates a closure that has access to the button variable, even after the init function has completed execution and been removed from the stack.

When the button is clicked, the closure executes and displays an alert message, demonstrating the concept of closures in event listeners.

Conclusion

Closures are an essential part of the JavaScript language that every JavaScript developer should understand. A closure is created when an inner function has access to variables in its outer function even after the outer function has completed execution and been removed from the stack.

Closures are often used to create private variables, event listeners, and much more, making them one of the most fundamental concepts in JavaScript.

I hope this blog helped you understand closures better. Thank you for reading!

Time Track Chrome Extension

Ali Sina Yousofi — Fri, 12 May 2023 17:32:26 +0000

What I built

I built a Time Tracker Chrome Extension that helps users track and manage the amount of time they spend on websites. The extension allows users view the time, website, the date they visited the website and they can delete those data.

Category Submission:

Wacky Wildcards

App Link

Not published.

Screenshots

Description

The Time Tracker Chrome Extension is a Chrome browser extension that tracks the time you spend on websites and helps you stay focused and productive.

Link to Source Code

Link to source code

Permissive License

The Time Tracker Chrome Extension is licensed under the MIT License.

Background (What made you decide to build this particular app? What inspired you?)

I decided to build this extension because I noticed that I was spending a lot of time on unproductive websites and wanted a way to monitor my activity and stay accountable. I also wanted to develop my skills in building browser extensions and learn more about the Chrome extension ecosystem.

How I built it (How did you utilize GitHub Actions or GitHub Codespaces? Did you learn something new along the way? Pick up a new skill?)

I built the Time Tracker Chrome Extension using HTML, CSS, and JavaScript. I utilized GitHub Actions to automate the build and deployment process, and GitHub Codespaces to develop and test my code in a cloud environment. Along the way, I learned about browser extension development, Chrome extension APIs, and best practices for publishing and promoting browser extensions.

Additional Resources/Info

For more information about the Time Tracker Chrome Extension, please see the README.md file in the GitHub repository.

What is API and RESTful API.

Ali Sina Yousofi — Sat, 08 Apr 2023 11:02:55 +0000

Introduction

An API (Application Programming Interface) is a set of protocols, routines, and tools used for building software applications. Essentially, it defines the rules and standards for how different software components should interact with each other.

APIs allow developers to create applications that can interact with other software components or services, such as databases, web services, operating systems, and hardware. By providing a standardized interface, APIs simplify the process of integrating different components, making it easier to create complex software systems.

APIs can be used for a variety of purposes, including:

Building applications that leverage the functionality of other software components or services
Exposing data or functionality from an application to other developers or systems
Creating new services or applications by combining existing functionality from multiple sources
Improving the performance or scalability of an application by offloading certain tasks to specialized services

In summary, APIs are essential for building complex software systems that rely on the integration of different components and services. They provide a standardized interface that simplifies the process of integration and enables developers to create powerful and flexible applications.

What is REST API.

A RESTful API (Representational State Transfer API) is a type of API that uses HTTP requests to perform various operations, such as retrieving or updating data. It follows a set of architectural principles that define how web standards, such as HTTP and URLs, should be used to create web services.

RESTful APIs are designed to be simple, scalable, and easy to use. They use standard HTTP methods, such as GET, POST, PUT, DELETE, and PATCH, to perform CRUD (Create, Read, Update, Delete) operations on resources.

Some key characteristics of a RESTful API include:

Stateless: The server does not store any client context between requests. Each request is treated independently.
Resource-based: RESTful APIs use resources, which can be any type of data that can be represented as a URL. Each resource has a unique identifier (URI) that can be used to access it.
Uniform Interface: RESTful APIs use a uniform interface, which defines the standard HTTP methods used to perform operations on resources.
Client-server: RESTful APIs are client-server architectures, meaning that the client and server are separate and communicate through requests and responses.
Cacheable: RESTful APIs are designed to be cacheable, meaning that responses can be cached by the client or intermediary servers to improve performance.

RESTful APIs have become a popular way to create web services due to their simplicity, scalability, and flexibility. They are used by many popular web services, such as Twitter, GitHub, and Google Maps.

Why you should use RESTful API.

Standardization: RESTful APIs follow a set of standard architectural principles and use well-defined HTTP methods, which makes it easier to develop, maintain, and consume APIs.
Scalability: RESTful APIs are highly scalable, meaning that they can handle a large number of requests and responses without affecting the performance or reliability of the service.
Flexibility: RESTful APIs can support a variety of data formats, including JSON, XML, and others, and can be used with any programming language or platform that supports HTTP.
Decoupling: RESTful APIs can decouple the client and server, meaning that the client and server can be developed independently, making it easier to maintain and update them.

Overall, RESTful APIs provide a simple and efficient way to create web services that can be easily consumed by other applications and services. They offer a standardized and scalable approach to building modern software applications, making it easier to create powerful and flexible systems that can adapt to changing business needs.

Destructing arrays.

Ali Sina Yousofi — Wed, 05 Apr 2023 10:07:15 +0000

Introduction

JavaScript is a versatile language that allows developers to perform a wide range of operations, including manipulating arrays. One powerful feature that JavaScript provides for working with arrays is array destructuring. In this blog post, we will explore how to use array destructuring in JavaScript.

What is Array Destructuring ?

Array destructuring is a feature in JavaScript that allows developers to extract values from arrays and assign them to variables in a single line of code. This can be particularly useful when working with large arrays or when you only need to access a few values from an array.

Array destructuring is accomplished using square brackets and a list of variable names separated by commas. The order of the variable names corresponds to the order of the values in the array.

Here is an example of array destructuring in action:

In this example, we have created an array myArray that contains five values. We then use array destructuring to assign the first two values of the array to variables first and second, respectively. We skip the third value of the array using an empty slot between the second and fourth variable. Finally, we assign the fourth value of the array to the fourth variable.

What is Array Destructuring?

Array destructuring is accomplished using square brackets and a list of variable names separated by commas. The order of the variable names corresponds to the order of the values in the array.

Here is an example of array destructuring in action:

arduino

const myArray = [1, 2, 3, 4, 5];
const [first, second, , fourth] = myArray;

console.log(first); // 1
console.log(second); // 2
console.log(fourth); // 4

Array destructuring is flexible, so you can skip any number of values in the array or assign values to any number of variables.

Using Rest Syntax with Array Destructuring

In addition to extracting individual values from an array using array destructuring, you can also use the rest syntax to collect remaining elements into a new array. This can be particularly useful when working with arrays of varying lengths or when you want to operate on a subset of an array.

Here is an example of using the rest syntax with array destructuring:

In this example, we use the rest syntax ...rest to collect the remaining values of the array into a new array called rest.

Conclusion

Array destructuring is a powerful feature in JavaScript that allows developers to extract values from arrays and assign them to variables in a single line of code. This can be particularly useful when working with large arrays or when you only need to access a few values from an array. Additionally, you can use the rest syntax with array destructuring to collect remaining elements into a new array. By using array destructuring, you can write more concise and readable code in JavaScript.

Creational Design Patterns.

Ali Sina Yousofi — Sat, 01 Apr 2023 19:51:57 +0000

Introduction

Design patterns are a popular way to solve common software design problems. They provide reusable solutions that can help you write more maintainable and efficient code. Creational design patterns are a subset of design patterns that are used to create objects in a system. In this blog post, we will explore creational design patterns and their applications.

Creational design patterns are used to create objects in a system. They are used to abstract the process of object creation and provide a way to decouple the client code from the object creation process. This allows the client code to remain independent of the specific classes used for object creation, making it easier to maintain and modify the code over time.

There are five main types of creational design patterns:

1. Singleton Pattern
2. Factory Pattern
3. Abstract Factory Pattern
4. Builder Pattern
5. Prototype Pattern

Let's take a closer look at each of these patterns and their uses.

Singleton Pattern

The Singleton pattern ensures that only one instance of a class is created and provides global access to that instance. This pattern is useful when you want to limit the number of instances of a class, such as when you have a resource that should only be accessed by one object.

Factory Pattern

The Factory pattern is used to create objects without specifying the exact class of object that will be created. The Factory pattern provides a way to encapsulate object creation in a separate class, making it easier to maintain and modify the code over time.

Abstract Factory Pattern

The Abstract Factory pattern provides an interface for creating related or dependent objects without specifying their concrete classes. The Abstract Factory pattern allows for the creation of families of objects that are designed to work together, such as creating objects that are specific to a particular operating system.

Builder Pattern

The Builder pattern separates the construction of a complex object from its representation, allowing the same construction process to create different representations. The Builder pattern provides a way to create complex objects step by step, making it easier to modify the construction process without affecting the final object.

Prototype Pattern

The Prototype pattern allows for the creation of new objects by copying or cloning existing objects. The Prototype pattern is useful when creating new objects is costly or when you want to create variations of an object without modifying the original object.

In conclusion, creational design patterns are a useful tool for creating objects in a system. They provide a way to abstract the process of object creation, making it easier to maintain and modify the code over time. By understanding the different types of creational design patterns, you can choose the appropriate pattern for your specific use case and improve the overall design of your system.

{minimize: false} MongoDB

Ali Sina Yousofi — Mon, 27 Mar 2023 12:55:25 +0000

Explanation

In Mongoose, when creating a schema, the { minimize: false } option is used to prevent the schema from automatically removing empty objects and arrays from the document before saving it to the database.

By default, Mongoose will remove any object or array from the document that has no keys or elements. This behavior is useful in many cases as it helps to keep the database tidy by removing unnecessary empty data.

However, in some situations, you may want to store empty objects or arrays in the database. For example, you may want to store a user profile with an empty address field that will be filled in later. In this case, you can use the { minimize: false } option when defining your schema to prevent Mongoose from removing the empty field.

Here is an example of how to use { minimize: false } in a Mongoose schema:

In this example, the address field is defined as an object, and the { minimize: false } option is used to prevent Mongoose from removing it if it is empty. Note that the default option is also used to set the address field to an empty object by default.

Check if a user has enough internet speed for uploading a photo in JavaScript

Ali Sina Yousofi — Mon, 27 Mar 2023 05:06:05 +0000

For chrome browser

We can use the navigator.connection API to get the estimated data transfer rate, and compare it with the size of the photo that the user wants to upload.

Here is an example code snippet that checks if the user has enough internet speed to upload a photo of a certain size:

In this example, we assume that the minimum required upload speed is 2 Mbps, and the photo size to upload is 5 MB (5000000 bytes). We calculate the maximum upload time in seconds based on the photo size and minimum required speed, and then calculate the maximum allowed photo size based on the estimated speed and maximum upload time. If the photo size to upload is less than or equal to the maximum allowed size, we consider that the user has enough internet speed to upload the photo. Otherwise, we consider that the user does not have enough internet speed.

Why we use app.use(express.urlEncoded({extended: true})) in our express web app.

Ali Sina Yousofi — Sun, 26 Mar 2023 15:39:44 +0000

Explanation

The express.urlencoded() middleware function is used to extract the data from the request body and add it to the request object in the form of req.body. The extended option allows to choose between parsing the URL-encoded data with the querystring library (when false) or the qs library (when true).

When the extended option is set to true, the qs library is used to parse the URL-encoded data. This library allows for more complex data structures to be parsed from the request body, such as arrays and nested objects.

Overall, this code is configuring the Express.js app to parse incoming URL-encoded data from request bodies using the qs library, and adding it to the req.body object for easy access in subsequent middleware functions or routes.

Git and Github

Ali Sina Yousofi — Sat, 25 Mar 2023 17:42:20 +0000

Git Introduction

Git is a powerful and popular version control system used by software developers to manage source code and collaborate on projects. It was created by Linus Torvalds in 2005 and has since become the de facto standard for version control in the software industry.

At its core, Git is a distributed version control system. This means that each developer has a local copy of the code repository on their computer, and changes can be made and committed locally before being pushed to a central repository that is shared with other team members. This allows for greater flexibility and collaboration, as developers can work on different parts of the codebase independently and merge their changes together seamlessly.

One of the key features of Git is its ability to track changes to the codebase over time. Each time a change is made to a file, Git creates a new version of that file, known as a "commit." Each commit includes a timestamp, the author of the change, and a brief description of what was changed. This allows developers to track the history of the codebase and easily revert to a previous version if necessary.

Git also includes powerful branching and merging capabilities. Branching allows developers to create a separate copy of the codebase that can be worked on independently. This is useful for creating experimental features or fixing bugs without affecting the main codebase. Once the changes have been tested and verified, they can be merged back into the main codebase using Git's merging functionality.

In addition to its core features, Git also has a rich ecosystem of tools and services built around it. There are a number of popular Git hosting services, such as GitHub, GitLab, and Bitbucket, that allow developers to share their code repositories and collaborate on projects with other developers. These services also provide tools for code review, issue tracking, and continuous integration and deployment.

Github Introduction

GitHub is a popular online platform for hosting and collaborating on software development projects. It was founded in 2008 and has since become one of the most widely used platforms for managing Git repositories.

At its core, GitHub provides a web-based interface for managing Git repositories. This allows developers to easily create, clone, and push code repositories from their local machines to a centralized location that can be accessed by other team members. GitHub also provides powerful collaboration features, such as issue tracking, pull requests, and code review tools, that allow team members to work together more effectively.

GitHub also provides a number of tools and services that make it easy to integrate with other software development tools. For example, GitHub can be integrated with popular continuous integration and deployment services, such as Travis CI and CircleCI, to automatically test and deploy code changes as they are made. GitHub can also be integrated with other project management tools, such as Trello and Asana, to provide a seamless workflow for managing projects and tasks.

Some git commands

git init - This command initializes a new Git repository in the current directory.
git clone - This command creates a copy of a Git repository on your local machine. It is typically used to download repositories from remote locations, such as GitHub or Bitbucket.
git add - This command stages changes to files in the repository for inclusion in the next commit. You can stage individual files or entire directories using this command.
git commit - This command creates a new commit in the repository, incorporating the changes that were staged using the git add command. Each commit includes a message describing the changes made.
git status - This command displays the current status of the repository, including any changes that have been made since the last commit.
git log - This command displays a log of all the commits that have been made to the repository, including the author, timestamp, and commit message.
git branch - This command displays a list of all the branches in the repository. Branches are used to work on different features or parts of the codebase independently.
git checkout - This command allows you to switch between different branches in the repository.

In conclusion, Git provides a powerful and flexible set of commands for managing code repositories. While the commands listed above are just a few of the most commonly used, there are many more commands available that can help you manage your codebase more effectively.