swissmanu

/**
 * Draws a smiley inside the given rectangle. The mood value (0...1) is used
 * to make the smiley happy or sad.
 *
 * @param rect Rectangle to draw the smiley into
 * @param mood Happy (= 1) or sad (= 0) or anything in between
 */
-(void)drawSmileyInRect:(CGRect)rect withMood:(float)mood {
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    CGContextSaveGState(ctx);

swissmanu

/**
 * An even more common approach to look for vendor specific implementations in
 * the browsers javascript object model.
 * lookUpImplementation(vendors,subject,functionName,replacement) is reusable
 * for other tasks too :-)
 */
var vendors = ['webkit','moz','o','ms'];
window.requestAnimationFrame = lookUpImplementation(
	vendors, window, 'requestAnimationFrame'
	,function(step) {