JavaScript копировать массив
let arr =["a","b","c"];
// ES6 way
const copy = [...arr];
// older method
const copy = Array.from(arr);
Batman
let arr =["a","b","c"];
// ES6 way
const copy = [...arr];
// older method
const copy = Array.from(arr);const sheeps = ['Apple', 'Banana', 'Juice'];
// Old way
const cloneSheeps = sheeps.slice();
// ES6 way
const cloneSheepsES6 = [...sheeps];/* Copying arrays or parts of arrays in JavaScript */
var fruit = ["apple", "banana", "fig"]; // Define initial array.
console.log(fruit); // ["apple", "banana", "fig"]
// Copy an entire array using .slice()
var fruit2 = fruit.slice();
console.log(fruit2); // ["apple", "banana", "fig"]
// Copy only two array indicies rather than all three
// From index 0 (inclusive) to index 2 (noninclusive)
var fruit3 = fruit.slice(0,2);
console.log(fruit3); // ["apple", "banana"]setMyArray(oldArray => [...oldArray, newElement]);
var numbers = [1,2,3,4,5];
var newNumbers = Object.assign([], numbers);var oldColors=["red","green","blue"];
var newColors = oldColors.slice(); //make a clone/copy of oldColors