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A book series on JavaScript. @YDKJS on twitter.

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JavaScript Style Guide

:bathtub: Clean Code concepts adapted for JavaScript

A long list of (advanced) JavaScript questions, and their explanations :sparkles:

Quick Overview

The JavaScript-Equality-Table repository is a visual representation of JavaScript's equality comparisons. It provides an interactive table showing the results of comparing different values using both strict (===) and loose (==) equality operators in JavaScript. This project helps developers understand the nuances of JavaScript's type coercion and equality rules.

Pros

  • Offers a clear, visual representation of JavaScript equality comparisons
  • Interactive table allows users to explore different equality scenarios
  • Helps developers understand and avoid common pitfalls in JavaScript equality checks
  • Includes explanations for unexpected results, aiding in learning

Cons

  • May be overwhelming for beginners due to the complexity of JavaScript's equality rules
  • Focuses solely on equality comparisons, not covering other aspects of JavaScript
  • Could benefit from more detailed explanations or links to further resources
  • May need updates as JavaScript evolves (though equality rules are relatively stable)

Code Examples

This repository doesn't provide a code library, but rather an interactive visualization. Therefore, there are no code examples to showcase.

Getting Started

As this is not a code library, there are no specific getting started instructions. Users can simply visit the GitHub repository and interact with the provided table to explore JavaScript equality comparisons.

Competitor Comparisons

A book series on JavaScript. @YDKJS on twitter.

Pros of You-Dont-Know-JS

  • Comprehensive coverage of JavaScript concepts, providing in-depth explanations
  • Regularly updated to reflect the latest JavaScript features and best practices
  • Free and open-source resource with a large community following

Cons of You-Dont-Know-JS

  • Requires significant time investment to read and understand all the content
  • May be overwhelming for beginners due to its depth and complexity
  • Text-heavy format, which might not appeal to visual learners

Code Comparison

JavaScript-Equality-Table focuses on visualizing equality comparisons:

var table = [
  [true, false, 1, 0, -1, "true", "false", "1", "0", "-1", "", null, undefined, Infinity, -Infinity, [], {}, [[]], [0], [1], {}],
  // ... (additional rows)
];

You-Dont-Know-JS provides in-depth explanations of JavaScript concepts:

function foo() {
  console.log(this.a);
}

var obj = {
  a: 2,
  foo: foo
};

obj.foo(); // 2

While JavaScript-Equality-Table offers a quick reference for equality comparisons, You-Dont-Know-JS provides comprehensive explanations of JavaScript concepts, including scope, closures, and the 'this' keyword. The former is more focused and specific, while the latter covers a broader range of topics in greater detail.

144,559

JavaScript Style Guide

Pros of JavaScript

  • Comprehensive style guide covering many aspects of JavaScript development
  • Actively maintained with regular updates and contributions
  • Includes explanations and examples for each rule

Cons of JavaScript

  • More complex and time-consuming to implement fully
  • May be overwhelming for beginners or small projects
  • Some rules might be opinionated and not universally agreed upon

Code Comparison

JavaScript-Equality-Table:

// No specific code examples provided, focuses on equality comparisons

JavaScript:

// Example of airbnb style guide rule
const items = [1, 2, 3];
items.forEach((item) => {
  console.log(item);
});

Summary

JavaScript-Equality-Table is a focused repository that provides a visual representation of JavaScript equality comparisons. It's simple and easy to understand, making it useful for quick reference.

JavaScript, on the other hand, is a comprehensive style guide that covers a wide range of JavaScript best practices and conventions. It's more suitable for larger projects and teams looking to maintain consistent coding standards.

While JavaScript-Equality-Table is specific to equality comparisons, JavaScript covers various aspects of JavaScript development, including syntax, naming conventions, and best practices. The choice between the two depends on the specific needs of the project and the team's preferences.

:bathtub: Clean Code concepts adapted for JavaScript

Pros of clean-code-javascript

  • Comprehensive guide covering various aspects of clean code practices in JavaScript
  • Provides practical examples and explanations for each concept
  • Regularly updated with contributions from the community

Cons of clean-code-javascript

  • Focuses on general coding practices rather than specific JavaScript quirks
  • May be overwhelming for beginners due to its extensive content
  • Lacks interactive elements or visual aids

Code Comparison

JavaScript-Equality-Table:

var a = [];
var b = [];
console.log(a == b);  // false
console.log(a === b); // false

clean-code-javascript:

// Bad
const array = new Array();
const arrayWithSize = new Array(5);

// Good
const array = [];
const arrayWithSize = Array(5).fill(null);

The JavaScript-Equality-Table repository focuses on demonstrating equality comparisons, while clean-code-javascript provides guidelines for writing cleaner, more maintainable code. The former helps understand JavaScript's equality behavior, while the latter aims to improve overall coding practices.

A long list of (advanced) JavaScript questions, and their explanations :sparkles:

Pros of javascript-questions

  • Comprehensive coverage of JavaScript concepts with 150+ questions
  • Detailed explanations for each answer, promoting deeper understanding
  • Regular updates and contributions from the community

Cons of javascript-questions

  • More time-consuming to go through due to its extensive content
  • May be overwhelming for beginners due to the complexity of some questions

Code Comparison

JavaScript-Equality-Table focuses on equality comparisons:

true == '1'  // true
1 == '1'     // true
null == undefined  // true

javascript-questions covers a wider range of topics:

let a = 3;
let b = new Number(3);
console.log(a == b);  // true
console.log(a === b);  // false

Summary

JavaScript-Equality-Table is a concise resource specifically for understanding JavaScript's equality comparisons. It provides a quick reference for developers dealing with type coercion and equality issues.

javascript-questions, on the other hand, offers a comprehensive set of JavaScript questions covering various topics. It's an excellent resource for in-depth learning and interview preparation but requires more time investment.

Both repositories serve different purposes and can be valuable depending on the user's needs and experience level.

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README

JavaScript equality comparison is a crazy thing, sometimes. When in doubt, use three equals signs.

You can view the demo here.

You can also check out a new, unified version of the equality table.