Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
JavaScript: How to map array values without using "map" method?
We can map the elements of an array by using the looping methods in JavaScript. The map() method creates a new array that will produce the outputs of a function for each element of the array. The map method can also be implemented using the for loop in JavaScript.
Approach
We will create two arrays out of which the first array contains the array elements that need to be mapped whereas the second array contains the output of the following array. We will be using the JavaScript Array push() function for returning the values of a function in the output array.
Syntax
array.push(element1, element2, element, ... , elementN
For finding the length of the array, we can use the below syntax −
array.length
Example
In the below example, we will be using the array.push() method to push the mapped values into the resultant array.
# index.html
<!DOCTYPE html>
<html>
<head>
<title>
Mapping Array Elements
</title>
</head>
<body>
<h2 style="color:green">
Welcome To Tutorials Point
</h2>
</body>
<script>
var arr = [1, 2, 3, 4, 5, 6];
var result = [];
let i;
//This function will return the square of the number
const square = function(num){
return num*num;
}
for(i=0; i< arr.length; i++){
result.push(square(arr[i]));
}
console.log(result);
//Expected output: [1, 4, 9, 16, 25, 36]
</script>
</html>Output
1K+ Views
