Function: `ArrayReduce`

Run the provided udf over the array to reduce the values to a single output

Method Signature

ArrayReduce(array=[array], callback=[function:BiFunction], initialValue=[any])

Argument	Type	Required	Description
`array`	`array`	`true`	The array to reduce
`callback`	`function:BiFunction`	`true`	The function to invoke for each item. The function will be passed 3 arguments: the accumulator, the current item, and the current index. You can alternatively pass a Java BiFunction which will only receive the first 2 args. The function should return the new accumulator value.
`initialValue`	`any`	`false`	The initial value of the accumulator