JavaScript TypedArray entries() Method

This method returns a new Array Iterator object that contains key/value pairs for each index in the array. For all item in the original array, the new iteration object will have an array with the index as the key and the item as the value.

What is Iterator?

An iterator is an object that have track of its current position, while accessing items in a collection one at a time.

An iterator returns an object with two properties: key and value.

Syntax:

Parameters:

No parameters.

Return value:

A new Array Iterator object.

Browser Support:

Chrome	38
Edge	Yes
Firefox	28
Opera	No

Example 1

<script type="text/javascript">
// JavaScript to illustrate entries() method
 var array1 = ["javaTpoint","Core java","Advanced java"];

var iterator1 = array1.entries();

document.write(iterator1.next().value);

document.write("<br>")
// expected output: Array [0, "javaTpoint"]

document.write(iterator1.next().value);
// expected output: Array [1, "Core java"]

</script>

Test it Now

Output:

[0, 'javaTpoint']
[1,'Core java']

Example 2

<script type="text/javascript">
// JavaScript to illustrate entries() method
// Input array
var a = ['Core Java', 'Python', 'Android'];
var iterator = a.entries();
for (let e of iterator) {
document.write("<br>") 
document.write(e);
}
// expected output
// [0, 'core Java']
// [1, 'Python']
// [2, 'Android'] 
</script>

Test it Now

Output:

 [0, 'core Java']
 [1, 'Python']
[2, 'Android']

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