pop method
The pop method removes the last
element from an array. In this case,
the original array is modified, and the
removed element is returned as the
result of the method.
Syntax
array.pop();
Example
Let's remove the last element from an array:
let arr = ['a', 'b', 'c', 'd', 'e'];
arr.pop();
console.log(arr);
The code execution result:
['a', 'b', 'c', 'd']
Example
Let's output the last element that was removed from an original array:
let arr = ['a', 'b', 'c', 'd', 'e'];
let del = arr.pop();
console.log(del);
The code execution result:
'e'
Example . Usage
Let's convert an array into the string
'16-25-34'. To solve the problem,
we use a combination of pop,
shift,
push
and join
methods:
let arr = ['1', '2', '3', '4', '5', '6'];
let res = [];
while (arr.length > 0) { // array is reduced in a loop until it reaches zero
let first = arr.shift();
let last = arr.pop();
let str = first + last; // there will be the string '16', then '25', then '34'
res.push(str);
}
// After the loop, res contains the array ['16', '25', '34']. We merge it into a string:
res = res.join('-');
console.log(res);
The code execution result:
'16-25-34'
