andymatuschak

//
//  NSObject+BlockObservation.h
//  Version 1.0
//
//  Andy Matuschak
//  andy@andymatuschak.org
//  Public domain because I love you. Let me know how you use it.
//

#import <Cocoa/Cocoa.h>

zaius

ctrl-z
bg

touch /tmp/stdout
touch /tmp/stderr
gdb -p $!

# In GDB
p dup2(open("/tmp/stdout", 1), 1)
p dup2(open("/tmp/stderr", 1), 2)

AlanQuatermain

//
//  KBNetworkActivityIndicator.h
//  Kobov3
//
//  Created by Jim Dovey on 10-03-21.
//  Copyright 2010 Kobo Inc. All rights reserved.
//

#import <Foundation/Foundation.h>

joericioppo

#import <Foundation/Foundation.h>

@interface FOOPSDWriter : NSObject {

	NSMutableData	*data_;
	NSUInteger		location_;
}

- (void) writeInt64:(UInt64)value;
- (void) writeInt32:(UInt32)value;

castano

#include <intrin.h> // __rdtsc
#include <stdio.h>

typedef unsigned int uint;
typedef unsigned short uint16;
typedef unsigned long long uint64;

// ISPC functions:
extern "C" void half_to_float_test(const uint16 * vin, float * vout, int count);
extern "C" void half_to_float_test_fast(const uint16 * vin, float * vout, int count);

sprhawk

(from :http://www.entropy.ch/blog/Developer/2010/04/15/Git-diff-for-Localizable-strings-Files.html)

First, add this to the project’s .git/info/attributes file:
+

*.strings diff=localizablestrings

(Unfortunately you do have to add it to every project, there doesn’t seem to be a global attributes configuration file)

Second, add this to your ~/.gitconfig file:

jboner

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

hellerbarde

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

irace

typedef void (^BlockType)(id);

void (^blockName)(void) = ^{
  // Code
};

@property (nonatomic, copy) void (^blockName)(void);

- (id)initWithBlock:(void(^)(void))blockName;

agaviria

# comments example for .dat or .ledger files
@smallexample
; This is a single line comment,
# and this,
% and this,
| and this,
* and this.

# If you have a deeply nested tree of accounts, 
# it may be convenient to define an alias, for example: