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addMouseEvents: function (){
        this.canvas.addEventListener('mousedown', function(event){
		    console.log("mouse down");
    	}, false);
    	this.canvas.addEventListener('mouseup', function(event){
    		console.log("mouse up");
    	}, false);
    }

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neutralizeAnimationFunc: function(){
    if(!window.requestAnimationFrame){
	    window.requestAnimationFrame = (window.webkitRequestAnimationFrame || 
            window.mozRequestAnimationFrame || 
            window.oRequestAnimationFrame || 
            window.msRequestAnimationFrame || 
            function(callback){
	            return window.setTimeout(callback, 1000/60);
	        });
    }

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checkCanvasSupport: function(){
    		if(!document.createElement('canvas').getContext) {
				alert("This browser dosn't support the canvas element");
				return false;
			}else{
				console.log("success!");
				return true;
			}
		},

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drawFrame: function(){
    		window.requestAnimationFrame(this.drawFrame, this.canvas);
		this.render();
	},

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# configure a pipe rule
sudo ipfw pipe 1 config bw 512Kbit/s delay 500ms

# add the pipe to connection in and out port 80
sudo ipfw add 1 pipe 1 src-port 80
sudo ipfw add 2 pipe 1 dst-port 80

# remove the rules and delete the pipe
sudo ipfw delete 1
sudo ipfw delete 2

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var err = new Error();
console.log(err.stack)

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function shuffleArray(ary) {
  var i = ary.length, j, x;
  while (i) {
    j = Math.floor(Math.random() * i);
    i -= 1;
    x = ary[i];
    ary[i] = ary[j];
    ary[j] = x;
  }
}

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/* in header.php */
<?php touch('wp-content/themes/{your theme name}/{your template name}.php'); ?>

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let aConstant: Int = 70
var aVariable: Int = 70
aConstant += 1 // Error! aConstant is not mutable
aVariable += 1

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let numOfApples = 3
print("I have \(numOfApples) apples")