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JavaScript | typedArray.reduceRight() with Examples
  • Last Updated : 31 Jul, 2018

The typedArray.reduceRight() is an inbuilt function in JavaScript which is used to reduce each element of the typedArray from right to left into a single value.
Syntax:

typedArray.reduceRight(callback)

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

  • previousValue: It is the previously returned value.
  • currentValue: It is the current element being processed in the typedArray.

Return value: It returns the result of the reduceRight() function.

JavaScript code to show the working of this function:

Code #1:

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<script>
    
  // Creating some typedArray
  const A = new Uint8Array([ 1, 2, 3, 4]);
  const B = new Uint8Array([5, 6, 7]);
  const C = new Uint8Array([1, 3, 5]);
  const D = new Uint8Array([2, 4, 6, 8]);
  
  // Calling sum() function 
  function sum(previousValue, currentValue) {
  return previousValue + currentValue;
  }
  
  // Printing reduced value of the given typedArray
  document.write(A.reduceRight(sum) +"<br>");
  document.write(B.reduceRight(sum) +"<br>");
  document.write(C.reduceRight(sum) +"<br>");
  document.write(D.reduceRight(sum));
     
     
</script>

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Output:

10
18
9
20

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