averageOfBufferedValues.js

var dataSet = [];

function debug(printString){
    if (DebugMode){
        print(printString + "\n");  
    }
}

function main(){

    // DO setup here: ONCE ONLY ************************************************
    DebugMode = true; //example usage: debug("string" + var + "\n");
    MaxValues = arguments[0]; // no Var makes global
	
	//  NOTE: setup arguments[2] as a trigger that is triggered when any value is sent to arguments[1]. 
	//      This forces the code to run and allows duplicate values to be entered into the array.
    
    debug("Start DataSet Length = " + dataSet.length + "\n\n");

	// main function for LOOP **************************************************
    main = function(){
	if (arguments[3]){ // input 4 mutated to trigger. Reset the array
		dataSet = [];
		return; // don't output anything... not required with reset.
	}
	if (dataSet.length >= MaxValues){
		dataSet.splice(0, 1); // remove first value since buffer is at Max
	}
		dataSet.push(arguments[1]); // add last recieved value to end of array, increasing total.
		debug("arguments1 = " + arguments[1] + "\n");
		debug("DataSet Length = " + dataSet.length + "\n");
		//debug("DataSet = " + dataSet + "\n"); // gets big
		
		// reduce array using a function at add all values contained together.
		var Sum = dataSet.reduce(function(accumulator, currentValue, currentIndex, array) {
			return accumulator + currentValue;
		});
		debug("DataSet Sum = " + Sum + "\n");
		var Average = Sum / dataSet.length;
		debug("DataSet Avg = " + Average + "\n\n");
		
		out = [Average] // set output array
		return out; // return out array
	};

	// RUN ONCE FOR INIT ONLY
	var out = []; // declare out 
	return out; // return from INIT state

}