Misc

In JavaScript, iterators allow you to define how a set of data should be iterated over. While JavaScript provides built-in iterators for arrays, strings, and other objects, you can also create user-defined iterators to customize iteration for custom data structures. …

In JavaScript, a predicate is a function that returns a boolean value, i.e., either true or false. Predicates are typically used to test conditions in higher-order functions like filter(), some(), and every(). They are commonly used to make decisions, filter …

Template literals (also called template strings) in JavaScript are a powerful feature introduced in ES6 (ECMAScript 2015). They allow you to create multi-line strings, embed variables and expressions into strings, and make string concatenation easier and more readable. In this …

In JavaScript, Reflect is a built-in object that provides methods for interceptable JavaScript operations. These methods correspond to the default operations that can be intercepted by Proxy objects. The Reflect object allows us to perform many low-level object manipulations like …

In JavaScript, the Proxy object enables you to intercept and customize the behavior of fundamental operations on objects, such as property lookup, assignment, enumeration, function invocation, and more. With Proxy, you can control the behavior of objects in ways that …

In modern JavaScript, async/await provides a cleaner and more readable way to work with asynchronous code compared to traditional callback functions or .then() chains with Promises. Introduced in ES2017, async and await allow you to write asynchronous code in a …

JavaScript modules allow you to split your code into separate files, each encapsulating specific functionality. Modules help in organizing, maintaining, and reusing code by exporting and importing functions, objects, or values from one file to another. JavaScript modules are supported …

Typed arrays in JavaScript provide a way to work with binary data using arrays of fixed types and sizes. They are particularly useful when interacting with raw binary data from external sources such as files, network operations, or when performing …

A WeakSet in JavaScript is a special type of set that allows you to store weakly held objects. Like a regular Set, a WeakSet stores a collection of unique values. However, WeakSet differs from Set in several important ways: Only …

A WeakMap in JavaScript is a collection of key-value pairs where keys are objects and values can be any data type. Unlike a regular Map, the keys in a WeakMap are weakly referenced, meaning they do not prevent garbage collection …