Functions


function name( arguments/parameters )


Ex
var result
function doMathGood(num1, num2, name){

//alert 'name' did 'their' homework
//function does the math and returns the value afterwards

	alert(name + " did great math.  This is a lie.");

	return num1 + num2;
}


Usage:


Call name, provide arguments/parameters (if needed)

var result = doMathGood(50,60, "GMan");
alert(doMAthGood(80,90, "GMan"));


Value generated by the function (via its return statement) isn't stored, thus is lost
to the tron like world in your computer.


To save it, try:

answerToWorldHunger = doMathGood(50,60,"GMan");


Calling the function at all made the alert, using the equals (assignment statement)
made the results that were RETURNed persist and not get lost.



Functions can do jobs, return values, or both.


Tiny detail: Methods

Methods are basically functions except they are attached to objects (gr 12 stuff)

ctx.fillRect   <- fillRect is part of 'ctx', so its a method
fillRect() on its own makes no sense, because theres no canvas being told to do anything

Example   worker.weld() makes sense, its the worker who welds
		weld()	makes no sense, because it takes a worker to do welding work, the weld
		code alone can stand apart and be used like that.

function beWacky()   <- theres no '.' involved, it stands alone.  So its okay to just beWacky()
			its not part of a bigger thing.




var ballx = []
var bally = []
var bsx = []
var bsy = [];


//individual
function followMouse(index){
	if(ballx[index] < mx) bsx[index] = 5;
	else bsx[index] = -5;

	if(bally[index] < my) bsy[index] = 5;
	else bsy[index] = -5;

	ballx[index] += bsx[index];
	bally[index] += bsy[index];
}



//NOT individual
function followMouseEveryone(){
	for(var index = 0; index < ballx.length; index++){
		//Direction changes
		if(ballx[index] < mx) bsx[index] = 5;
		else bsx[index] = -5;
	
		if(bally[index] < my) bsy[index] = 5;
		else bsy[index] = -5;

		//Actual Motion
		ballx[index] += bsx[index];
		bally[index] += bsy[index];
	}
}





function paint(){


	followMouseEveryone();
	for(var i = 0; i < asteroids.length;i++){
		ballCollision(i); //i is the index of a specific asteroid
	}

}


function ballCollision(index){
	//collides asteroid[index] with every ball via a for loop

}








}