js create array from string code example

Example 1: js array to string

var myArray = ['no','u'];
var myString = myArray.toString();

Example 2: string to array javascript

const str = 'Hello!';

console.log(Array.from(str)); //  ["H", "e", "l", "l", "o", "!"]

Example 3: array to string javascript

var cars = ["Volvo", "BMW", "Audi", "Chevrolet"];
console.log(cars.toString());
//Output: Volvo,BMW,Audi,Chevrolet

Example 4: transform array to string js

//Use array.join(separator) //
const myArray = [1, 2, 3, 4, 5, 6];
console.log(a.join('/'));
//output : 1/2/3/4/5/6
const myArray = ['g', 'o', 'o', 'g', 'l', 'e'];
console.log(a.join(''));
//output : 'google'
// Source : https://www.geeksforgeeks.org/javascript-array-join-method/#:~:text=Below%20is%20the%20example%20of%20the%20Array%20join()%20method.&text=The%20arr.,is%20a%20comma(%2C%20).

//Other function : array.toString() //
const array1 = [1, 2, 'a', '1a'];
console.log(array1.toString());
// output: "1,2,a,1a"
// Source : https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Objets_globaux/Array/toString

Example 5: array to string javascript

<array>.join(<splitting character(s)>);

Example 6: convert string to array js

// créer une instance d'Array à partir de l'objet arguments qui est semblable à un tableau
function f() {
  return Array.from(arguments);
}

f(1, 2, 3); 
// [1, 2, 3]


// Ça fonctionne avec tous les objets itérables...
// Set
const s = new Set(["toto", "truc", "truc", "bidule"]);
Array.from(s);   
// ["toto", "truc", "bidule"]


// Map
const m = new Map([[1, 2], [2, 4], [4, 8]]);
Array.from(m);                          
// [[1, 2], [2, 4], [4, 8]]  

const mapper = new Map([["1", "a"], ["2", "b"]]);
Array.from(mapper.values());
// ["a", "b"] 

Array.from(mapper.keys());
// ["1", "2"]

// String
Array.from("toto");                      
// ["t", "o", "t", "o"]


// En utilisant une fonction fléchée pour remplacer map
// et manipuler des éléments
Array.from([1, 2, 3], x => x + x);      
// [2, 4, 6]


// Pour générer une séquence de nombres
Array.from({length: 5}, (v, k) => k);    
// [0, 1, 2, 3, 4]