https://stackoverflow.com › questions › 237104
How do I check if an array includes a value in JavaScript?The top answers assume primitive types but if you want to find out if an array contains an object with some trait, Array.prototype.some () is an elegant solution: const items = [ {a: '1'}, {a: '2'}, {a: '3'} ] items.some(item => item.a === '3') // returns true. items.some(item => item.a === '4') // returns false.
https://www.w3schools.com › Jsref › jsref_includes_array.asp
JavaScript Array includes() Method - W3SchoolsLearn how to use the includes() method to check if an array contains a specified value. See examples, syntax, parameters, return value and browser support for this ECMAScript7 feature.
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()
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://www.javascripttutorial.net › array › how-to-check-if-an-array-contains-a-value-in...
How to Check if an Array Contains a Value in JavascriptLearn how to use the array.includes() method and the array.some() method with a helper function to check if an array contains a primitive value or an object in JavaScript. See examples, explanations and limitations of each method.
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://masteringjs.io › tutorials › fundamentals › includes
Check if a JS Array Contains a Specific ValueLearn how to use Array#includes() and Array#indexOf() to determine whether a JavaScript array contains a given element. Compare the differences, advantages and disadvantages of these two methods, and how to handle NaN values.
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://dmitripavlutin.com › javascript-array-contains-value
Checking if an Array Contains a Value in JavaScript - Dmitri Pavlutin BlogThe easiest way to determine if an array contains a primitive value is to use array.includes() ES2015 array method: const hasValue = array.includes(value[, fromIndex]); The first argument value is the value to search in the array.
