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JavaScript | typedArray.map() with Examples

The typedArray.map() is an inbuilt function in JavaScript which is used to create a new typedArray with the result of a provided function on each element of the given typedArray.
Syntax:

typedArray.map(callback)

Parameters: It accepts a parameter callback function which accept some parameter which are specified below-

  • currentValue: It is the current element which is being processed in the typedArray.
  • index: It is the index of the current element which is being processed in the typedArray.
  • array: It is the typedArray which is being called.

Return value: It returns a new typedArray with the result of a provided function on each element of the given typedArray.

JavaScript code to show the working of this function:

Code #1:

<script>
   
  // Creating a typedArray with some elements
  const A = new Uint8Array([4, 9, 16, 25, 36]);
    
  // Calling map() function with the parameter
  // Math.sqrt function which find square root 
  // of the typedArray's elements
  const B = A.map(Math.sqrt);
  
  // Printing the result of the function
  document.write(B);
  
</script>

Output:

2,3,4,5,6

Code #2:

<script>
   
  // Creating a typedArray with some elements
  var A = new Uint8Array([1, 2, 3, 4, 5, 6]);
    
  // Calling map() function
  var B = A.map(function(a) {
  return a * 5;
  });
    
  // Returning the results
  document.write(B);
  
</script>

Output:

5,10,15,20,25,30


This article is attributed to GeeksforGeeks.org

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