JavaScript copiar uma matriz
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);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// this is for array with complex object
var countries = [
{name: 'USA', population: '300M'},
{name: 'China', population: '1.6B'}
];
var newCountries = JSON.parse(JSON.stringify(countries));
let arr = ["jason", "james", "jelani"];
let arrCopy = arr.slice();
//Note that this is "slice" and not "splice".
//arr.splice() would be very different!
console.log(arrCopy);//["jason", "james", "jelani"]
//Makes deep copy
arrCopy[0] = "jamil";
console.log(arr); //["jason", "james", "jelani"]
console.log(arrCopy);//["jamil", "james", "jelani"]