TypedArray reduce() JavaScript

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The Javascript TypedArray reduce() method is used to reduce the elements of an array into a single value.

Syntax:

array.reduce(function(total, currentValue, index, arr), initialValue)

Parameters:
total: It represents the previously returned value of the function.
currentValue: It represents the index position of the current element.
index: It represents the index position of the current element.
arr: It represents the array.
thisValue: It represents this argument for the function.

Returns:
It returns the reduced single value.

Example 1:

<!DOCTYPE html>
<html>
<body>
<script type="text/javascript">   
var Jewels = ["DIAMOND","GOLD","PLATINUM","SILVER"];
let result =Jewels.reduce(function(a,b)  
{  return a + b;  });   
document.write(result);  
</script>
</body>
</html>

Example 2:

<!DOCTYPE html>
<html>
<body>
<script type="text/javascript"> 
const testArray = new Uint8Array([10, 11, 12, 13]);
 
function sum(previousValue, currentValue) {
  return previousValue + currentValue;
}
 
document.write(testArray.reduce(sum));
 
</script>
</body>
</html>