.pop() without changing the origianal variable?

JavaScript
1

Hello, is it possible to sustain a variable the same as it was after using the pop() method?

var i = ["one", "two", "three", "four"]
document.write(i)
var n = i.pop()
document.write(i)

For example, can the “n” variable be set to the last item of the “i” array without removing that item from the array?

2

Hey there,

good question!
You can use slice to create a copy:

var i = ["one", "two", "three", "four"];
console.log("before", i);

var n = i.slice().pop();
console.log("after", i); 
// ["one", "two", "three", "four"]

MDN: slice

1 Like
3

To get the value of the last element in an array, you could access the index array.length - 1.

const nums = [1, 2, 3, 4, 5];
const lastNum = nums[nums.length - 1];

console.log(nums); // [1, 2, 3, 4, 5];
console.log(lastNum); // 5
4

why not just var n = i.slice(-1)?

5

Yes, you are right,
I was focused on popping it.

6

This would return the last value in an array, pop returns only the value.

7

then add a [0] at the end of it