var colors = ["white","blue"]; colors.unshift("red"); //add red to beginning of colors // colors = ["red","white","blue"]
let array = ["A", "B"]; let variable = "what you want to add"; //Add the variable to the beginning of the array array.unshift(variable); //=========================== console.log(array); //output => //["what you want to add" ,"A", "B"]
//see https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Objets_globaux/Array/unshift const array1 = [1, 2, 3]; console.log(array1.unshift(4, 5)); // expected output: 5 console.log(array1); // expected output: Array [4, 5, 1, 2, 3]
let monTableau = ['un', 'deux','trois', 'quatre'] ; monTableau.unshift('zero') ; //console.log(monTableau) ; let monTableau2D = [ ['Mark' , 'jeff' , 'Bill'] , ['Zuckerberg' , 'Bezos' , 'Gates'] ] ; monTableau2D[1].unshift('test') ; //console.log(monTableau2D) ;