https://stackoverflow.com › questions › 767486
How do I check if a variable is an array in JavaScript?There are several ways of checking if an variable is an array or not. The best solution is the one you have chosen. This is the fastest method on Chrome, and most likely all other browsers. All arrays are objects, so checking the constructor property is a fast process for JavaScript engines.
Learn how to use Array.isArray () to determine if a value is an array in JavaScript. See the syntax, parameters, return value, examples, and browser compatibility of this method.
https://stackoverflow.com › questions › 4775722
javascript - How can I check if an object is an array? - Stack OverflowThe easiest and fastest way to check if an Object is an Array or not. var arr = []; arr.constructor.name === 'Array' // Returns true; or. arr.constructor === Array // Returns true; Or you can make a utility function: const isArray = (obj) => !!obj && obj.constructor === Array; Usage: isArray(arr); // Returns true
https://www.w3schools.com › jsref › jsref_isarray.asp
JavaScript Array isArray() Method - W3SchoolsLearn how to use the isArray() method to check if an object is an array in JavaScript. See examples, syntax, parameters, return value and browser support for this ECMAScript5 feature.
https://www.javascripttutorial.net › array › how-to-check-if-a-variable-is-an-array-in...
How to Check If a Variable is an Array in JavaScript - JavaScript TutorialLearn two ways to check if a variable is an array in JavaScript: using the Array.isArray() method or the instanceof operator. See examples, browser support and code language.
La méthode Array.isArray() permet de déterminer si l'objet passé en argument est un objet Array, elle renvoie true si le paramètre passé à la fonction est de type Array et false dans le cas contraire.
https://www.javascripttutorial.net › array › how-to-check-if-an-array-contains-a-value-in...
How to Check if an Array Contains a Value in JavascriptFor primitive values, use the array.includes() method to check if an array contains a value. For objects, use the isEqual() helper function to compare objects and array.some() method to check if the array contains the object.
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() .
https://www.tutorialspoint.com › how-to-check-if-a-variable-is-an-array-in-javascript
How to check if a variable is an array in JavaScript?In javascript we can check whether a variable is array or not by using three methods. 1) isArray () method. The Array.isArray () method checks whether the passed variable is array or not. If the variable is an array it displays true else displays false. Syntax. Array.isArray(variableName) Example. Live Demo.
https://www.programiz.com › javascript › examples › check-object-array
JavaScript Program to Check if An Object is An ArrayThe Array.isArray() method returns true if an object is an array, otherwise returns false. Note : For an array, the typeof operator returns an object. For example,
