26 lines
801 B
Markdown
26 lines
801 B
Markdown
|
---
|
||
|
|
title: Add Elements to the End of an Array Using concat Instead of push
|
||
|
|
---
|
||
|
|
|
||
|
|
## Add Elements to the End of an Array Using concat Instead of push
|
||
|
|
Where the `push` method adds new element to the end of the orginal array, the `concat` method creates a new array containing the elements from the original array and the new element. The original array remains the same when using `concat`.
|
||
|
|
|
||
|
|
#### Relevant Links:
|
||
|
|
- [Array.prototype.concat()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/concat)
|
||
|
|
|
||
|
|
## Solution
|
||
|
|
```javascript
|
||
|
|
function nonMutatingPush(original, newItem) {
|
||
|
|
|
||
|
|
// Add your code below this line
|
||
|
|
|
||
|
|
return original.concat(newItem);
|
||
|
|
|
||
|
|
// Add your code above this line
|
||
|
|
}
|
||
|
|
|
||
|
|
var first = [1, 2, 3];
|
||
|
|
var second = [4, 5];
|
||
|
|
nonMutatingPush(first, second);
|
||
|
|
|
||
|
|
```
|