paulirish

// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel

// MIT license

(function() {
    var lastTime = 0;
    var vendors = ['ms', 'moz', 'webkit', 'o'];

zen4ever

AVCaptureVideoDataOutput *videoOutput = [[AVCaptureVideoDataOutput alloc] init];

NSDictionary *formats = [NSDictionary dictionaryWithObjectsAndKeys:
       @"kCVPixelFormatType_1Monochrome", [NSNumber numberWithInt:kCVPixelFormatType_1Monochrome],
       @"kCVPixelFormatType_2Indexed", [NSNumber numberWithInt:kCVPixelFormatType_2Indexed],
       @"kCVPixelFormatType_4Indexed", [NSNumber numberWithInt:kCVPixelFormatType_4Indexed],
       @"kCVPixelFormatType_8Indexed", [NSNumber numberWithInt:kCVPixelFormatType_8Indexed],
       @"kCVPixelFormatType_1IndexedGray_WhiteIsZero", [NSNumber numberWithInt:kCVPixelFormatType_1IndexedGray_WhiteIsZero],
       @"kCVPixelFormatType_2IndexedGray_WhiteIsZero", [NSNumber numberWithInt:kCVPixelFormatType_2IndexedGray_WhiteIsZero],
       @"kCVPixelFormatType_4IndexedGray_WhiteIsZero", [NSNumber numberWithInt:kCVPixelFormatType_4IndexedGray_WhiteIsZero],

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?