This gist is part of a blog post. Check it out at:
http://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer
<script> | |
;("header footer section aside nav article figure figcaption hgroup time").replace(/\w+/g,function(a){document.createElement(a)}) | |
</script> |
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
- (void)loadDefaultSettings | |
{ | |
NSMutableDictionary *defaults = [NSMutableDictionary dictionaryWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Default-Settings" ofType:@"plist"]]; | |
// other setup... | |
[[NSUserDefaults standardUserDefaults] registerDefaults:[NSDictionary dictionaryWithDictionary:defaults]]; | |
} | |
- (void)resetDefaultSettings |
This gist is part of a blog post. Check it out at:
http://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer
// Usage example: | |
// input image: http://f.cl.ly/items/3v0S3w2B3N0p3e0I082d/Image%202011.07.22%2011:29:25%20PM.png | |
// | |
// UIImage *buttonImage = [UIImage ipMaskedImageNamed:@"UIButtonBarAction.png" color:[UIColor redColor]]; | |
// .h | |
@interface UIImage (IPImageUtils) | |
+ (UIImage *)ipMaskedImageNamed:(NSString *)name color:(UIColor *)color; | |
@end |
@interface DownloadOperation : NSOperation | |
{ | |
NSURLRequest *request; | |
NSURLConnection *connection; | |
NSMutableData *receivedData; | |
} | |
@property(readonly) BOOL isExecuting; | |
@property(readonly) BOOL isFinished; |