https://stackoverflow.com › questions › 767486
How do I check if a variable is an array in JavaScript?In Crockford's JavaScript The Good Parts, there is a function to check if the given argument is an array: var is_array = function (value) { return value && typeof value === 'object' && typeof value.length === 'number' && typeof value.splice === 'function' && !(value.propertyIsEnumerable('length')); };
https://stackoverflow.com › questions › 4775722
javascript - How can I check if an object is an array? - Stack OverflowN.B. strings will be converted into an array with a single element instead of an array of chars. Delete the isString check if you would prefer it the other way around. I've used Array.isArray here because it's the most robust and also simplest.
Array.isArray() checks if the passed value is an Array. It does not check the value's prototype chain, nor does it rely on the Array constructor it is attached to. It returns true for any value that was created using the array literal syntax or the Array constructor.
https://www.w3schools.com › jsref › jsref_isarray.asp
JavaScript Array isArray() Method - W3SchoolsDescription. The isArray() method returns true if an object is an array, otherwise false. Array.isArray () is a static property of the JavaScript Array object. You can only use it as Array.isArray (). Using x.isArray (), where x is an array will return undefined. Syntax. Array.isArray (obj) Parameters. Return Value. Array Tutorials: Array Const.
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.w3schools.com › js › js_arrays.asp
JavaScript Arrays - W3SchoolsUsing an array literal is the easiest way to create a JavaScript Array. Syntax: const array_name = [item1, item2, ...]; It is a common practice to declare arrays with the const keyword. Learn more about const with arrays in the chapter: JS Array Const. Example. const cars = ["Saab", "Volvo", "BMW"]; Try it Yourself »
https://www.geeksforgeeks.org › how-to-check-if-a-variable-is-an-array-in-javascript
How to check if a variable is an array in JavaScript?The Array.isArray () method in JavaScript checks if a variable is an array. It returns true if the variable is an array and false otherwise. This method is the most reliable and straightforward way to confirm an array, introduced in ECMAScript 5. Syntax: Array.isArray(variableName)
La méthode find() renvoie la valeur du premier élément trouvé dans le tableau qui respecte la condition donnée par la fonction de test passée en argument. Sinon, la valeur undefined est renvoyée.
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://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,
