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JavaScript | typedArray.forEach() with Examples

  • Last Updated : 03 Aug, 2018

The typedArray.forEach() is an inbuilt function in JavaScript which executes a given function once for each given typedArray’s element.
Syntax:

typedarray.forEach(callback)

Parameter: It accepts a parameter “callback” function which produces each element of the new typedArray and this function takes three parameter that are specified below-

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  • currentValue: It is the value of the current element which is being processed in the typedArray.
  • index: It is the index of the current element being processed in the array.
  • array: It is the array on which forEach() function is being called.

Return Value: It does not return anything.
JavaScript code to show the working of this function:




<script>
  
    // Constructing some typedArray
    const A = new Uint8Array([ 1, 3, 5, 7 ])
    const B = new Uint8Array([ 2, 4, 6, 8 ])
  
      // Calling callback function
      function callback(element, index, array) {
          document.write('a[' + index + '] = ' + element + "<br>");
      }
  
      // Calling forEach() function
      A.forEach(callback);
      B.forEach(callback);
  
</script>

Output:

a[0] = 1
a[1] = 3
a[2] = 5
a[3] = 7
a[0] = 2
a[1] = 4
a[2] = 6
a[3] = 8
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