https://stackoverflow.com › questions › 237104
How do I check if an array includes a value in JavaScript?What is the most concise and efficient way to find out if a JavaScript array contains a value? This is the only way I know to do it: function contains(a, obj) { for (var i = 0; i < a.length;...
https://www.w3schools.com › Jsref › jsref_includes_array.asp
JavaScript Array includes() Method - W3SchoolsThe includes() method returns true if an array contains a specified value. The includes() method returns false if the value is not found. The includes() method is case sensitive.
La méthode includes() permet de déterminer si un tableau contient une valeur et renvoie true si c'est le cas, false sinon. Exemple interactif. Note : Cette méthode utilise l'algorithme de comparaison SameValueZero qui fonctionne comme l'égalité stricte, à la différence que NaN est ici égal à lui même. Syntaxe. js. array.includes(élémentRecherché);
The includes() method of Array instances determines whether an array includes a certain value among its entries, returning true or false as appropriate. Try it Syntax
https://stackoverflow.com › questions › 8217419
How to determine if a JavaScript array contains an object with an ...Array.prototype.some() This is the most exact answer for your question, i.e. "check if something exists", implying a bool result. This will be true if there are any 'Magenic' objects, false otherwise: let hasMagenicVendor = vendors.some( vendor => vendor['Name'] === 'Magenic' ) Array.prototype.filter()
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.
https://www.freecodecamp.org › news › check-if-an-item-is-in-an-array-in-javascript-js...
Check if an Item is in an Array in JavaScript – JS Contains with Array ...You can use the includes() method in JavaScript to check if an item exists in an array. You can also use it to check if a substring exists within a string. It returns true if the item is found in the array/string and false if the item doesn't exist.
https://attacomsian.com › blog › javascript-array-search
How to check if an array contains a value in JavaScriptThe simplest and fastest way to check if an item is present in an array is by using the Array.indexOf() method. This method searches the array for the given value and returns its index. If no item is found, it returns -1.
https://stackabuse.com › javascript-check-if-array-contains-a-value-element
JavaScript: Check if Array Contains a Value/Element - Stack AbuseLearn how to use built-in methods such as includes(), indexOf(), and some() to check if an array has a specific value or object in JavaScript. See examples of primitive values, objects, and callback functions.
https://masteringjs.io › tutorials › fundamentals › includes
Check if a JS Array Contains a Specific ValueThere are two common ways to check if a JavaScript array contains a value: `includes()` and `indexOf()`. This tutorial shows you how to use both, and why you would use one versus the other.
