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JavaScript Set entries() Method

JavaScript Set entries() Method with example, clear() method, javascript set methods, delete() method, entries() method, foreach() method, has() method, values() method etc.

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JavaScript Set entries() method

The JavaScript Set entries() method returns an object of new set iterator. This object contains an array of [value, value] for each element. It maintains an insertion order.

Unlike Map, the Set object doesn't use key externally. To keep the values unique it uses the key internally. Thus, Set considers the value of element as a key. In array[value, value], the first value represents the key whereas the second value represents the value of element.

Syntax

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

setObj.entries()

Return Value

A new object of set iterator that contains an array of [value, value] for each element.

JavaScript Set entries() method example

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

Example 1

Let's see a simple example of entries() method.

<script>
var set = new Set();
set.add("jQuery");
set.add("AngularJS");
set.add("Bootstrap");
var itr=set.entries();
for(i=0;i<set.size;i++)
  {
document.writeln(itr.next().value+"<br>");
  }
  </script>
Test it Now

Output:

jQuery,jQuery
AngularJS,AngularJS
Bootstrap,Bootstrap

Example 2

Let's see the same example in a different way.

<script>
var set = new Set();
set.add("jQuery");
set.add("AngularJS");
set.add("Bootstrap");
var itr=set.entries();
for(let elements of itr)
  {
document.writeln(elements+"<br>");
  }
  </script>
Test it Now

Output:

jQuery,jQuery
AngularJS,AngularJS
Bootstrap,Bootstrap

Next TopicJavaScript Set forEach() Method




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