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JavaScript supports different kinds of loops: for - loops through a block of code a number of times. for/in - loops through the properties of an object. for/of - loops through the values of an iterable object. while - loops through a block of code while a specified condition is true. do/while - also loops through a block of code while a ...
Array.isArray() Cette méthode renvoie true si la variable est un tableau, false sinon. Array.of() Cette méthode permet de créer une nouvelle instance d' Array à partir d'un nombre variable d'arguments (peu importe la quantité ou le type des arguments utilisés).
Dec 18, 2023 · JavaScript arrays are zero-indexed: the first element of an array is at index 0, the second is at index 1, and so on — and the last element is at the value of the array's length property minus 1. JavaScript array-copy operations create shallow copies.
Nov 5, 2023 · 00:00:00 arrays00:01:06 index00:02:16 array methods00:03:07 .length00:03:41 .indexOf00:04:33 iterate an array00:06:34 enhanced for loop00:07:18 sort00:07:29 ...
Dec 18, 2023 · JavaScript arrays are zero-indexed: the first element of an array is at index 0, the second is at index 1, and so on — and the last element is at the value of the array's length property minus 1. JavaScript array-copy operations create shallow copies.
May 11, 2017 · Array. .prototype. The Array.prototype property represents the prototype for the Array constructor and allows you to add new properties and methods to all Array objects. // add a new method returning the first element of an array. Array.prototype.first = function() {. return this[0];
Feb 5, 2024 · The find() method of Array instances returns the first element in the provided array that satisfies the provided testing function. If no values satisfy the testing function, undefined is returned. If you need the index of the found element in the array, use findIndex(). If you need to find the index of a value, use indexOf() .
