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JavaScript typedArray.entries() with Examples

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The Javascript typedArray.entries() is an inbuilt function in JavaScript that gives a new array iterator object containing the key and value pairs of the given typedArray object. 

Syntax:

typedArray.entries()

Parameter: It does not accept any parameters. 

Return value It returns a new array iterator object containing the key and value pairs of the given typedArray object.

JavaScript examples to show the working of this function:

Example 1: In this example, we will use the typedArray.entries() function to return the key and value pairs of the object.

javascript




<script>
    // Creating a typedArray Uint8Array() with some elements
    const uint8 = new Uint8Array([ 5, 10, 15, 20, 25, 30 ]);
      
    // Calling entries() function
    A = uint8.entries();
      
    // Shifting array iterator to next element one by one
    // Iterator assigned to 10
    A.next();
      
    // Iterator assigned to 15
    A.next();
      
    console.log(A.next().value);
</script>


Output: Here 2 is the index of element 15.

2, 15

 Example 2: Here output is undefined because iterator exceeds the upper bound.

javascript




<script>
    // Creating a typedArray Uint8Array() with some elements
    const uint8 = new Uint8Array([ 5, 10, 15, 20, 25 ]);
      
    // Calling entries() function
    A = uint8.entries();
      
    // Shifting array iterator to next element one by one
    // Iterator assigned to 10
    A.next();
      
    // Iterator assigned to 15
    A.next();
      
    // Iterator assigned to 20
    A.next();
      
    // Iterator assigned to 25
    A.next();
      
    // Iterator went out of index
    A.next();
    console.log(A.next().value);
</script>


Output:

undefined


Last Updated : 22 Dec, 2022
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