bkeating

HOWTO: Using FileMerge (opendiff) with Git on OSX

FileMerge (opendiff) can really come in handy when you need to visually compare merging conflicts. Other times it's just a nice visual way to review your days work.

The following method works by creating a simple bash script (git-diff-cmd.sh) that sets us up with the proper command line arguments for Git to pass off files to FileMerge.

mhayes

#!/bin/sh
# Amazon Linux AMI startup script for a supervisor instance
#
# chkconfig: 2345 80 20
# description: Autostarts supervisord.

# Source function library.
. /etc/rc.d/init.d/functions

supervisorctl="/usr/bin/supervisorctl"

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

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

rnapier

#!/usr/bin/python

# fix-xcode
# 	Rob Napier <robnapier@gmail.com>

# Script to link in all your old SDKs every time you upgrade Xcode
# Create a directory called /SDKs (or modify source_path).
# Under it, put all the platform directories:
# 	MacOSX.platform          iPhoneOS.platform        iPhoneSimulator.platform
# Under those, store the SDKs:

adamgit

##########################################
#
# c.f. http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4
#
# Version 2.82
#
# Latest Change:
# - MORE tweaks to get the iOS 10+ and 9- working
# - Support iOS 10+
# - Corrected typo for iOS 1-10+ (thanks @stuikomma)

nikcub

In August 2007 a hacker found a way to expose the PHP source code on facebook.com. He retrieved two files and then emailed them to me, and I wrote about the issue:

http://techcrunch.com/2007/08/11/facebook-source-code-leaked/

It became a big deal:

http://www.techmeme.com/070812/p1#a070812p1

The two files are index.php (the homepage) and search.php (the search page)

xeoncross

# Run this in the project repo from the command-line
# http://stackoverflow.com/a/4593065/99923

git log --shortstat --author "Xeoncross" --since "2 weeks ago" --until "1 week ago" | grep "files changed" | awk '{files+=$1; inserted+=$4; deleted+=$6} END {print "files changed", files, "lines inserted:", inserted, "lines deleted:", deleted}'

rabovik

/**
 * Several macros simplifying use of weak references to self inside blocks
 * which goal is to reduce risk of retain cycles.
 *
 * Example:
 * @code
 
 @interface Example : NSObject{
    int _i;
 }