JavaScript array pop() function is “used to remove the last element from an array and returns that element”. It changes the original array.
Syntax
array.pop()Parameters
None.
Return Value
It returns the removed element.
Example 1
let apps = [
{ name: 'Amazon', value: 1 },
{ name: 'Amazon Prime', value: 21 },
{ name: 'Amazon Music', value: 10 },
{ name: 'Amazon Go', value: 100 },
{ name: 'Amazon Alexa', value: 13 }
];
removedItem = apps.pop();
console.log('The remaining items are: ', apps);
console.log('The removed item is: ', removedItem);The last item of an array is removed, and we can get that element.
We can see that the item is removed, and the length of an array is modified.
Example 2
We can also perform the same operation with the integers of an array.
let numArr = [1, 3, 4, 5, 9];
let removedItem = numArr.pop();
console.log('The remaining items are: ', numArr);
console.log('The removed item is: ', removedItem);Output
Example 3
let strArr = ['stan', 'bruce', 'warren', 'michael'];
let removedItem = strArr.pop();
console.log('The remaining items are: ', strArr);
console.log('The removed item is: ', removedItem);Output
Example 4
If you call the pop() method on an empty array, it returns undefined. The length of the array becomes zero.
const numbers = [];
const last = numbers.pop();
console.log(last);
console.log(numbers.length);Output
undefined
0Example 5
The call() method is a predefined JavaScript method. With call(), an object can use a method belonging to another object. You can use the call() or apply() to call the pop() method on an array-like object.
let obj = {
0: "k",
1: "b",
2: "l",
length: 3
};
let last = Array.prototype.pop.call(obj);
console.log(last);
console.log(obj);Output
l
{ '0': 'k', '1': 'b', length: 2 }That’s it.
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