Node.js push() function

In this article, we will discuss the Node.js push() function with its syntax, parameters, and examples.

What is the Node.js push() function?

The push() method in Node.js is commonly associated with JavaScript arrays and is not a fundamental part of the Node.js runtime itself. An array can be modified by adding one or more elements to the end using the push() function. In order to add elements to the array, it accepts one or more arguments, each of which represents an element. In the order they are provided, the elements are appended to the end of the array. When the elements are added, the method returns the array's new length.

Syntax:

It has the following syntax:

Parameters:

• array_name: It is the name of the array to which an element is to be added. Any acceptable variable name that references an array might be used.
• push(): The function that is invoked on the array is named push(). A built-in feature of JavaScript arrays is the push() method, which is used to append one or more elements to the end of the array.
• element: The element we wish to add to the array is represented by this argument element. Any sort of data, including strings, numbers, objects, and even additional arrays, can be included.

Return type:

The function adds the element and then returns the array.

Example 1:

Let us take an example to illustrate the Node.js push() function.

Output:

 The Modified Array elements are: [ 51, 35, 42, 16, 27, 31, 27 ] 

Explanation:

In this example, the "PUSH" custom function is defined, and it adds a specified element to the end of an array while logging the modified array to the console. The function accepts two parameters: element, which is the element to be added, and "a", which is the array that needs to be modified. There is a declared array called "a" with initial values. After that, 27 is added to the array when the PUSH function is invoked with "a" as the array parameter and the number 27 as the element parameter. At last, the modified array is logged in the console, indicating every element, including the recently included 27.

Example 2:

Let us take another example to illustrate the Node.js push() function.

Output:

 The Updated Array elements are: [ 'Lotus', 'Lilly', 'Rose', 'Jasmine' ] 

Explanation:

In this example, we defines a "addFlower" custom function. It adds a configurable number of flower parameters to the end of an array. All flower parameters are gathered by the function using the rest parameter syntax and stored in an array called "flowers". After that, these flowers are added to the array "a" using the push() method and spread syntax. Following the array's update, the function logs the updated array to the console, containing both the original and the most recent flower elements. Finally, the method "addFlower" is called with the additional flowers ('Lilly, Rose, and Jasmine') to append them to the array after an array "a" is initialized with the value ['Lotus'].

Example 3:

Let us take another example to illustrate the Node.js push() function.

Output:

 The Original Array elements are: [ 'Lotus', 'Lilly', 'Rose' ] The Updated Array elements are: [ 'Lotus', 'Lilly', 'Rose', 'Jasmine' ] 

Explanation:

This code initializes an array called flowers with initial values that correspond to the three various kinds of flowers: rose, lotus, and Lilly. The original array contents are displayed on the console using the console.log() method. After that, we use the push() method to append the string "Jasmine" to the end of the flowers array. The modified array, with the addition of the new flower "Jasmine" is displayed on the console using another console.log() command. Overall, this code effectively demonstrates how to append elements to an array using the push() method in JavaScript.