shift() is an array function from Node.js that is used to delete elements from the front of an array.
Syntax:
array_name.shift()
Parameter: This function does not take any parameter.
Return type: The function returns the array after deleting the element.
The program below demonstrates the working of the function:
Program 1:
javascript
function shiftDemo() {
arr.shift();
console.log(arr);
}
const arr = [17, 55, 87, 49, 78];
shiftDemo();
|
Output:
[ 55, 87, 49, 78 ]
Program 2:
javascript
function shiftDemo() {
arr.shift();
console.log(arr);
}
const arr = [ 'a' , 'b' ];
shiftDemo();
|
Output:
[ 'b' ]
Program 3:
javascript
const Lang = [ "Python" , "C" , "Java" , "JavaScript" ];
while ((i = Lang.shift()) !== undefined) {
Lang.shift();
}
console.log(Lang);
|
Output:
[]
Last Updated :
30 Mar, 2023
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