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Objectice-C

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init 

- (id) init {
    if ( ! (self = [super init]) ) return nil;
    // ...
    return self;
}

dealloc 

- (void) dealloc {
    // ...
    [super dealloc];
}

Retain-release debug points 

- (id)retain {
    return [super retain];
}
- (oneway void)release {
    [super release];
}
- (id)autorelease {
    return [super autorelease];
}

Enumerator 

NSEnumerator * someEnumerator = [list objectEnumerator];
Some * item = nil;
while ((item = [someEnumerator nextObject])) {
  //...
}

SNLog

Like NSLog, but without all the timestamps etc. With and without trailing newlines. Really, it behaves like printf, but takes the arguments of NSLog.

void SNLognb(NSString *format, ...)
{
    va_list args;
    va_start (args, format);
    NSString *string;
    string = [[NSString alloc] initWithFormat: format  arguments: args];
    va_end (args);
    printf ("%s", [string cString]);
    [string release];
}

void SNLog(NSString *format, ...)
{
    va_list args;
    va_start (args, format);
    NSString *string;
    string = [[NSString alloc] initWithFormat: format  arguments: args];
    va_end (args);
    printf ("%s\n", [string cString]);
    [string release];
}

User default 

[[NSUserDefaults standardUserDefaults] boolForKey:@"orange"]

Basic timing analysis

Setup code to time sections of code, wrapped with startSection and endSection. Multiple sections can be compared at once. Call finishTiming to end and flush the counters to debug log.

Essentially a multiple concurrent tic-toc.

static NSMutableDictionary * _times = nil;
static NSMutableDictionary * _starts = nil;
NSMutableDictionary * times() {
    if (!_times) _times = [[NSMutableDictionary alloc] init];
    return _times;
}
NSMutableDictionary * starts() {
    if (!_starts) _starts = [[NSMutableDictionary alloc] init];
    return _starts;
}

void restartTiming() {
    _times = nil;
    _starts = nil;
}

void startSection(NSString *name) {
     [starts() setObject:[NSDate date] forKey:name];
}

void endSection(NSString *name) {
     NSTimeInterval time = [[times() objectForKey:name] doubleValue];
      time +=  [[starts() objectForKey:name] timeIntervalUntilNow];
     [times() setObject:@(time) forKey:name];
}

void finishTiming() {
    NSTimeInterval total = 0;
    for (NSString * name in times().allKeys) {
        NSTimeInterval time = [[times() objectForKey:name] doubleValue];
        NSLog(@"%@ || %f seconds", name, time);
        total += time;
    }
    NSLog(@"total || %f", total);
}

Tic Toc

tic starts the stopwatch. toc prints the elapsed time since the tic.

static NSDate * _tic_toc_time;
#define tic _tic_toc_time = [NSDate date];
#define toclabel(title) NSLog(@"%@: %.3f seconds", @#title, [[NSDate date] timeIntervalSinceDate:_tic_toc_time]);
#define toc toclabel(toc)

NSAlert modal wait 

[dialog performSelectorOnMainThread:@selector(runModal:) withObject:[view window] waitUntilDone:TRUE];
BOOL ok = dialog.modalCode;
if (ok) {
  //...
}

LLDB skip breakpoint

Use on a specific exception breakpoint to skip the pesky ones that keep coming up ignore_specified_objc_exceptions name:NSAccessibilityException className:NSSomeException