shift and unshift Examples

.shift() And .unshift() Examples

.shift()

The general syntax for this method is:

arrayName.shift()

This method removes and returns the FIRST element in an array.

No arguments are placed inside the parentheses ().

let arr = ['a', 'b', 'c', 'd', 'e'];

arr.shift();

console.log(arr);

Output

'a'
['b', 'c', 'd', 'e']

.unshift()

The general syntax for this method is:

arrayName.unshift(item1, item2, ...)

This method adds one or more items to the START of an array and returns the new length.

The new items may be of any data type.

let arr = ['a', 'b', 'c'];

arr.unshift('hello', 121);

console.log(arr);

5
['hello', 121, 'a', 'b', 'c']