JAVASCRIPT

javascript copy an array

let arr =["a","b","c"];
// ES6 way
const copy = [...arr];

// older method
const copy = Array.from(arr);

copy array javascript

const sheeps = ['Apple', 'Banana', 'Juice'];

// Old way
const cloneSheeps = sheeps.slice();

// ES6 way
const cloneSheepsES6 = [...sheeps];

javascript copy array

var numbers = [1,2,3,4,5];
var newNumbers = Object.assign([], numbers);

javascript copy array

// 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));

copy an array

// Copy an array
fn main() {
    let arr = ["a","b","c"];
    let mut another = arr.clone();  // make a copy
    println!("copy of arr = {:?} ", another);
    another[1] = "d";          // make a change
    assert_eq!(arr, another);  // panic, no longer equal
}

how to copy a javascript array

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"]

Copy an Array

let shallowCopy = fruits.slice() // this is how to make a copy
// ["Strawberry", "Mango"]