JavaScript does not support associative arrays. You should use objects when you want the element names to be strings (text). You should use arrays when you want the element names …

Mar 12, 2010 · if (!String.prototype.isInList) { Object.defineProperty(String.prototype, 'isInList', { get: => function(...args) { let value = this.valueOf(); for (let i = 0, l = args.length; i < l; i += 1) { if …

Apr 3, 2025 · This example shows three ways to create new array: first using array literal notation, then using the Array() constructor, and finally using String.prototype.split() to build the array …

Mar 7, 2025 · JavaScript strings are the sequence of characters. They are treated as Primitive data types. In JavaScript, strings are automatically converted to string objects when using …

Mar 20, 2023 · In this article, we will cover JavaScript arrays, strings, and objects in depth so you can benefit from some of the most effective static and instance methods that the language …

Dec 13, 2011 · Instead, one way to do it is as follows: The Array.join () method returns a string that is all of the array elements concatenated into a single string with an (optional) separator …

Apr 10, 2025 · String primitives and string objects share many behaviors, but have other important differences and caveats. See "String primitives and String objects" below. String literals can be …

Basic String Methods. Javascript strings are primitive and immutable: All string methods produce a new string without altering the original string.

Feb 10, 2025 · In JavaScript, an array is an ordered list of values. Each value is called an element, and each element has a numeric position in the array, known as its index. Arrays in …

Mar 29, 2023 · JavaScript comes with a variety of built-in methods that are ready to be used as soon as the language is implemented. These methods are pre-written methods and perform …