reduce<functionName>(__initial, __iterable);

function functionName(__accumulator, __element) {}


Apply a function to each element of an iterable, reducing it to a single value. Returns the single resulting value (the last accumulator value). 

The function argument should be a function accepting two arguments. The first time the accumulator function argument value will be the initial argument passed to reduce. Every next time the accumulator argument is the previous result of the function. 

When the iterable argument to reduce is an OBJECT, the function will be passed an OBJECT with a single key-value pair in the element argument.  


use System;

var inputs  = [1,2,3];
var sum     = reduce<sum>(0, inputs);
System.print(sum);                      // Prints 6

function sum(result, item) {
    return result + item;