HTML5 - Beginners - callback_sort.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width" />
</head>
<body>
  <div id="test"></div>
<canvas id="myCanvas" width="320" height="240" style="border:1px solid #d3d3d3;">
Use different browser.
</canvas>
  <script>
    var c=document.getElementById("myCanvas");
    var ctx=c.getContext("2d");

// here we create a
// array with numbers.
	var test = [7,2,12,87,3,56,32];
	

gameloop=setInterval(doGameLoop,16);

function doGameLoop(){
myCanvas.height = window.innerHeight-32;
myCanvas.width = window.innerWidth-32;
ctx.fillStyle="rgb(0,0,0)";
ctx.fillRect(0,0,c.width,c.height);
ctx.fillStyle="rgb(255,255,255)";
ctx.fillText("sorting array using callback..",10,10); 

// create a temp array
// and copy test array into
// this.
var a = [];
for(var i=0;i<test.length;i++){
a.push(test[i]);
}
// draw the contents of
// the temp array.
ctx.fillText("Original contents. : "+a,10,30); 
// sort the temp array
// using a callback
// function
a.sort(lowest);
// draw the contents of
// the temp array
ctx.fillText("sorted contents. : "+a,10,60); 


}
// this function is used as
// a callback function for
// sort. 
function lowest(a,b){
	return a-b;
}
</script>
</body>
</html>