Empujar elementos de matriz a otro mecanografiado de matriz
// Same array push
let arr1 = [0, 1, 2];
let arr2 = [3, 4, 5];
arr1.push(...arr2);
// New array push
let arr1 = [1, 2];
let arr2 = [3, 4];
let newArr = arr1.concat(arr2);
Cute Caterpillar