Calls the specified callback function for all the elements in a typed array, starting from the end of it. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
reduceRight(callback, initialValue?)
callback function(previousValue, currentValue, currentIndex, array)
A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
initialValue optional
If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
The accumulated result.