The set method in JavaScript's Map object is utilized to insert or modify an entry within the map by associating it with a specific key-value pair. It is essential that each value corresponds to a distinct key.
Syntax
The syntax for the set method is as follows:
Example
mapObj.set(key,value)
Parameter
key - It represents the key to be added.
value - It represents the value to be added.
Return
The Map object.
JavaScript Map set method example
In this section, we will explore the set method using a range of examples.
Example 1
Let's explore an example that demonstrates how to insert key-value pairs into a map object.
Example
<script>
var map=new Map();
map.set(1,"jQuery");
map.set(2,"AngularJS");
map.set(3,"Bootstrap");
document.writeln(map.get(1)+"<br>");
document.writeln(map.get(2)+"<br>");
document.writeln(map.get(3));
</script>
Output:
Output
jQuery
AngularJS
Bootstrap
Example 2
In this illustration, we will explore the outcome that occurs when identical keys are combined with varying values.
Example
<script>
var map=new Map();
map.set(1,"jQuery");
map.set(1,"AngularJS");
map.set(3,"Bootstrap");
document.writeln(map.get(1)+"<br>");
document.writeln(map.get(2)+"<br>");
document.writeln(map.get(3));
</script>
Output:
Output
AngularJS
undefined
Bootstrap
