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JavaScript Map forEach() Method

JavaScript Map forEach() Method with example, javascript map methods, abs() method, round() method, ceil() method, floor() method, pow() method, random() method, sqrt() method, max() method, min() method, log() method, sin() method, cos() method, tan() method etc.

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JavaScript Map forEach() method

The JavaScript map forEach() method execute the specified function once for each key/value pair in the Map object.

Syntax

The forEach() method is represented by the following syntax:

mapObj.forEach(callback[, thisArg])

Parameter

callback - It represents the function to execute.

value - It represents the value that treat as this when executing callback.

JavaScript Map forEach() method example

Here, we will understand forEach() method through various examples.

Example 1

Let's see an example to fetch the values from the Map object.

<script>
var map = new Map();
map.set(1,"jQuery");
map.set(2,"AngularJS");
map.set(3,"Bootstrap");
document.writeln("Fetching values :"+"<br>");
function display(values) 
{
document.writeln(values+"<br>");
}
map.forEach(display);
</script>
Test it Now

Output:

jQuery
AngularJS
Bootstrap

Example 2

Let's see an example to fetch the values and keys from the Map object.

<script>
var map = new Map();
map.set(1,"jQuery");
map.set(2,"AngularJS");
map.set(3,"Bootstrap");
document.writeln("Fetching values and keys :"+"<br>");
function display(values,key) 
{
document.writeln(values+" "+key+"<br>");
}
map.forEach(display);
</script>
Test it Now

Output:

Fetching values and keys :
jQuery 1
AngularJS 2
Bootstrap 3

Next TopicJavaScript Map




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