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@jspahrsummers
jspahrsummers / GHRunLoopWatchdog.h
Created January 28, 2015 20:50
A class for logging excessive blocking on the main thread
/// Observes a run loop to detect any stalling or blocking that occurs.
///
/// This class is thread-safe.
@interface GHRunLoopWatchdog : NSObject
/// Initializes the receiver to watch the specified run loop, using a default
/// stalling threshold.
- (id)initWithRunLoop:(CFRunLoopRef)runLoop;
/// Initializes the receiver to detect when the specified run loop blocks for
@calebd
calebd / ArrayHelpers.swift
Last active November 4, 2022 15:17
Swift Helpers
extension Array {
func first() -> Element? {
if isEmpty {
return nil
}
return self[0]
}
func last() -> Element? {
@coffeemug
coffeemug / gist:6168031
Last active October 15, 2024 01:08
The fun of implementing date support
After spending the better part of the month implementing date support
in RethinkDB, Mike Lucy sent the team the following e-mail. It would
have been funny, if it didn't cause thousands of programmers so much
pain. Read it, laugh, and weep!
-----
So, it turns out that we're only going to support dates between the
year 1400 and the year 10000 (inclusive), because that's what boost
supports.
@JaviSoto
JaviSoto / gist:5906004
Last active June 27, 2023 10:25
Mark designated initializer at compile time
#define MSDesignatedInitializer(__SEL__) __attribute__((unavailable("Invoke the designated initializer `" # __SEL__ "` instead.")))
// Sample usage:
- (instancetype)initWithObject:(id)object;
- (instancetype)init MSDesignatedInitializer(initWithObject:); // <- This even gets auto-complete.
// Now calling init on this class would throw a warning.
@eternalstorms
eternalstorms / Apple Evangelists.txt
Created June 12, 2013 09:07
Apple Evangelists (WWDC 2013)
UI- and App Frameworks Evangelist - Jake Behrens, [email protected], twitter: @Behrens
- What's new in Cocoa
- Accessibility in iOS
- Building User Interfaces for iOS 7
- Getting Started with UIKit Dynamics
- What's new in Cocoa Touch
- What's New With Multitasking
- Best Practices for Cocoa Animation
- Improving Power Efficiency with App Nap
- Introducing Text Kit
@krzysztofzablocki
krzysztofzablocki / gist:4396302
Last active November 24, 2021 19:17
Set symbol breakpoint on objc_msgSend then setup this debug command to log all methods called in iOS Simulator. If you want to do device debugging change esp+4 register to r0, esp+8 to r1 Found long ago somewhere on stackoverflow.
expr -- (void)printf("[%s, %s]\n",(char *) object_getClassName(*(long*)($esp+4)), (char *) *(long *)($esp+8) )
#if ! __has_feature(objc_arc)
#error This file/class is targeted for the ARC compiler. Either turn on ARC for your project or use -fobjc-arc flag
#endif
@0xced
0xced / XCDFakeCarrier.m
Last active March 5, 2023 22:07
Hack to choose the displayed carrier name in the iOS simulator
//
// Copyright (c) 2012-2015 Cédric Luthi / @0xced. All rights reserved.
//
#import <Foundation/Foundation.h>
#if TARGET_OS_SIMULATOR
static const char *fakeCarrier;
static const char *fakeTime;
@kgn
kgn / gist:3012995
Created June 28, 2012 18:11
Noise in Cocoa
+ (void)drawNoiseWithOpacity:(CGFloat)opacity inRect:(CGRect)rect{
static UIImage *noiseImage = nil;
static dispatch_once_t oncePredicate;
dispatch_once(&oncePredicate, ^{
NSUInteger width = 64, height = 64;
NSUInteger size = width*height;
char *rgba = (char *)malloc(size); srand(124);
for(NSUInteger i=0; i < size; ++i){rgba[i] = rand()%256;}
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray();
CGContextRef bitmapContext =
@0xced
0xced / NSObject+ARCZombie.m
Created May 19, 2012 17:52
Solves the problem of .cxx_destruct methods not being called when zombies are enabled
#import <objc/runtime.h>
@implementation NSObject (ARCZombie)
+ (void) load
{
const char *NSZombieEnabled = getenv("NSZombieEnabled");
if (NSZombieEnabled && tolower(NSZombieEnabled[0]) == 'y')
{
Method dealloc = class_getInstanceMethod(self, @selector(dealloc));