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Debugging

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@rudyjahchan
rudyjahchan / NSObject_Swizzle.h
Last active August 13, 2016 08:29
Monkey-Patching iOS with Objective-C Categories Part III: Swizzling
#import <Foundation/Foundation.h>
@interface NSObject (Swizzle)
+ (void)swizzleInstanceSelector:(SEL)originalSelector
withNewSelector:(SEL)newSelector;
@end
@hellerbarde
hellerbarde / latency.markdown
Created May 31, 2012 13:16 — forked from jboner/latency.txt
Latency numbers every programmer should know

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

@nateware
nateware / gist:3915757
Created October 19, 2012 01:27
Start Mac VNC server from command line
# Step 1: Set priveleges
$ sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -configure -allowAccessFor -allUsers -privs -all
Starting...
Setting allow all users to YES.
Setting all users privileges to 1073742079.
Done.
# Step 2: Allow VNC clients
@twobitlabs
twobitlabs / gist:4226365
Created December 6, 2012 17:35
Blocks cheat sheet
// http://cocoawithlove.com/2009/10/ugly-side-of-blocks-explicit.html has a nice breakdown of the syntax--it helps to think of the ^ as similar to a pointer dereference symbol *
// block typedef:
typedef void(^Block)();
typedef void(^ConditionalBlock)(BOOL);
typedef NSString*(^BlockThatReturnsString)();
typedef NSString*(^ConditionalBlockThatReturnsString)(BOOL);
// block property with typedef:
@OliverLetterer
OliverLetterer / XCDUUID.m
Created January 26, 2013 17:05
With this gist, I, as a total assembly noob, am trying to understand the XCDUUID runtime hack (https://github.com/0xced/NSUUID/blob/1.0.1/NSUUID.m#L167-L221) to be able to use NSUUID on iOS < 6.0.
@implementation XCDUUID
+ (void) load
{
// query runtime if NSUUID class already exists, if so => done
if (objc_getClass("NSUUID"))
{
return;
}
@0xced
0xced / README.md
Last active November 1, 2018 14:56
How to class-dump an iOS static framework

Using HockeySDK as an example

  1. Download HockeySDK 3.0.0
  2. Run these commands:
ARCH=armv7
FRAMEWORK_DIRECTORY="${HOME}/Downloads/HockeySDK-iOS-3/HockeySDK.embeddedframework"
FRAMEWORK_NAME=$(basename `echo "${FRAMEWORK_DIRECTORY}"/*.framework` .framework)
@rxin
rxin / ramdisk.sh
Last active November 21, 2024 15:11
ramdisk create/delete on Mac OS X.
#!/bin/bash
# From http://tech.serbinn.net/2010/shell-script-to-create-ramdisk-on-mac-os-x/
#
ARGS=2
E_BADARGS=99
if [ $# -ne $ARGS ] # correct number of arguments to the script;
then
@steipete
steipete / PSPDFThreadSafeMutableDictionary.m
Last active January 20, 2025 07:33
Simple implementation of a thread safe mutable dictionary. In most cases, you want NSCache instead, but it can be useful in situations where you want to manually control what is evicted from the cache in low memory situations.**Warning:** I only use this for setting/getting keys. Enumeration is not thread safe here and will still throw exception…
//
// PSPDFThreadSafeMutableDictionary.m
//
// Copyright (c) 2013 Peter Steinberger, PSPDFKit GmbH. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
@aprato
aprato / AMPNavigationBar.m
Last active July 13, 2018 00:23
Darker iOS7 translucent UINavigationBar
// .h
@interface AMPNavigationBar : UINavigationBar
@property (nonatomic, assign) CGFloat extraColorLayerOpacity UI_APPEARANCE_SELECTOR;
@end
// .m
@davidbalbert
davidbalbert / gist:6815258
Last active July 23, 2025 23:15
How to install custom SSL certificates on an ASUS RT-N66U running asuswrt-merlin
###########################################
# IMPORTANT NOTE:
#
# As of asuswrt-merlin 380.67 Beta, you
# can now configure SSL certificates from
# the Webui, making these instructions
# unnecessary.
###########################################