wat/docs/js/array/concat.md

Community-controlled cheat sheets for every coder.

## array.concat(value1[, value2...])

```js
const arr1 = ['a', 'b', 'c'];
const arr2 = [1, 2, 3];
const arr3 = arr1.concat(arr2);       
// ['a', 'b', 'c', 1, 2, 3]

const num1 = [1, 2];
const num2 = [3, 4];
const num3 = [5, 6];
const nums = num1.concat(num2, num3, 7, [8, 9]); 
// [1, 2, 3, 4, 5, 6, 7, 8, 9]
```