andkerosine

$stack, $draws = [], {}

def method_missing *args
  return if args[0][/^to_/]
  $stack << args.map { |a| a or $stack.pop }
  $draws[$stack.pop(2)[0][0]] = args[1] if args[0] == :<
end

class Array
  def +@

mayoff

#define objc_msgSend(...) (objc_msgSend_without_cast())(__VA_ARGS__)

static inline id (*objc_msgSend_without_cast(void))(id, SEL, ...) __attribute__((deprecated("objc_msgSend must be cast to the correct type")));
static inline id (*objc_msgSend_without_cast(void))(id, SEL, ...) {
    return objc_msgSend;
}

proger

DTrace Sessions for iOS Development

DTrace is a comprehensive dynamic tracing framework created by Sun Microsystems for troubleshooting kernel and application problems on production systems in real time. Originally developed for Solaris, it has since been released to open source community in 2004 and has been ported to several other Unix systems.

Apple ported DTrace for OS X Leopard, including a GUI called Instruments and made it co-exist with the existing legacy stack of performance troubleshooting toolkits.

We are going to tame this beast to help us hunt down and eliminate all sorts of application and system-wide troubles when doing development of iOS and OS X apps.

the chat

steipete

nline void pspdf_dispatch_sync_reentrant(dispatch_queue_t queue, dispatch_block_t block) {
    dispatch_get_current_queue() == queue ? block() : dispatch_sync(queue, block);
}

stuartcarnie

#import <Foundation/Foundation.h>
#import <objc/message.h>

extern id fake_msgSend(id, SEL, int) __attribute__((noinline));

@interface Foo : NSObject

- (id)foo:(int)n;

@end

sydneyitguy

Status Code	Status Message	Symbol
1xx Informational
100	Continue	:continue
101	Switching Protocols	:switching_protocols
102	Processing	:processing
 
2xx Success
200	OK	:ok
201	Created	:created
202	Accepted	:accepted

mattt

Howdy howdy, NSHipsters!

If you alloc init an NSCalendar, you'll notice that New Year's Eve falls on a Monday this year, a.k.a. "the day NSHipster is published every week". What fun!

So in celebration of the upcoming year++, I thought it'd be fun to compile a list of some of your favorite tips and tricks of the trade. Submit your favorite piece of Objective-C trivia, framework arcana, hidden Xcode feature, or anything else you think is cool, and you could have it featured in the year-end blowout article. Just comment on this gist below!

Here are a few examples of the kind of things I'd like to see:

• StaticObjcMethods from [Apple]((http://developer.apple.com/library/mac/#samplecode/CocoaTipsAndTricks/Introduction/Intro.html): Demonstrates how to use static Objective-C m

atg

typedef id (^Tuple)(int i);

#define MUT_INTERNAL_VAARG_COUNT(...)  (sizeof((__strong id[]){__VA_ARGS__}) / sizeof(__strong id))

#define TUPLE(...) ({ \
  const unsigned mut_n = MUT_INTERNAL_VAARG_COUNT(__VA_ARGS__); \
  struct { __strong id mut_objs[mut_n]; } mut_innards = {{ __VA_ARGS__ }}; \
  ^ id (int mut_i) { \
    return (mut_i < 0 || mut_i >= mut_n) ? nil : mut_innards.mut_objs[mut_i]; \
  }; \

Coneko

#import <pthread.h>
#import <mach/thread_act.h>

// These two functions are declared in mach/thread_policy.h, but are commented out.
// They are documented here: https://developer.apple.com/library/mac/#releasenotes/Performance/RN-AffinityAPI/_index.html
kern_return_t	thread_policy_set(
					thread_t			thread,
					thread_policy_flavor_t		flavor,
					thread_policy_t			policy_info,
					mach_msg_type_number_t		count);

joshaber

self.startButton.rac_command = [RACCommand command];
self.stopButton.rac_command = [RACCommand command];
self.resetButton.rac_command = [RACCommand command];

static const CGFloat interval = 0.01;
__unsafe_unretained id weakSelf = self;
// Signal id -> Signal Signal Number
// Map each click of the start button to a signal that fires at our interval
// and stops when the stop button's clicked.
id<RACSignal> start = [self.startButton.rac_command map:^(id _) {