Question

How to use spread syntax (...) to concatenate arrays in JavaScript

Answer 1

let arr1 = [7, 0, 9];
let arr2 = [8, 2, 1]; 

arr1 = arr1.concat(arr2);

console.log(arr1);




/*
run:
 
[7, 0, 9, 8, 2, 1] 
 
*/

 

70+ SQL courses for beginners and professionals