ceberly

default:
	gcc -O0 -g3 -Wall -Wextra -Wconversion -Wdouble-promotion \
		-Wno-unused-parameter -Wno-unused-function -Wno-sign-conversion \
		main.c

format:
	clang-format -i main.c

yougg

set http or socks proxy environment variables

# set http proxy
export http_proxy=http://PROXYHOST:PROXYPORT

# set http proxy with user and password
export http_proxy=http://USERNAME:PASSWORD@PROXYHOST:PROXYPORT

# set http proxy with user and password (with special characters)

soderlind

1) Install cloudflared using homebrew:

brew install cloudflare/cloudflare/cloudflared

2) Create /usr/local/etc/cloudflared/config.yaml, with the following content

proxy-dns: true
proxy-dns-upstream:
  - https://1.1.1.1/dns-query
  - https://1.0.0.1/dns-query

zhaohangbo

1、安装arcanist，clone源代码到安装目录somewhere/，arcanist依赖于libphutil，所以两个都要clone
  somewhere/ git clone git://github.com/facebook/arcanist.git
  somewhere/ git clone git://github.com/facebook/libphutil.git
2、配置arc，将arc加入到PATH，或在/usr/sbin里面建一个到arc的软链接
  export PATH=$PATH:/somewhere/arcanist/bin/   
  或者：cd /usr/sbin; ln -sf /somewhere/arcanist/bin/arc
  * 在系统的~/.bashrc或~/.bash_profile中加上该export语句。
  * 运行命令"arc help"，来检测安装是否成功。
3、配置arc的编辑器，不然会报错，提示EDITOR环境变量没配置
  arc set-config editor "vim"

gilbertw1

Macbook Arch Guide

• Installation
• General Setup
• System Time
• Display
• Keyboard
• Touchpad
• Sound
• Bluetooth

evantoli

Configure Git to use a proxy

In Brief

You may need to configure a proxy server if you're having trouble cloning or fetching from a remote repository or getting an error like unable to access '...' Couldn't resolve host '...'.

Consider something like:

JonathanLalou

Android Emulator usage: emulator [options] [-qemu args]
  options:
    -sysdir <dir>                  search for system disk images in <dir>
    -system <file>                 read initial system image from <file>
    -datadir <dir>                 write user data into <dir>
    -kernel <file>                 use specific emulated kernel
    -ramdisk <file>                ramdisk image (default <system>/ramdisk.img
    -image <file>                  obsolete, use -system <file> instead
    -initdata <file>               same as '-init-data <file>'
    -data <file>                   data image (default <datadir>/userdata-qemu.img

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

eparreno

$ brew install libmagic
$ brew link libmagic  (if the link is already created is going to fail, don't worry about that)
$ env ARCHFLAGS="-arch x86_64" gem install ruby-filemagic -- --with-magic-include=/usr/local/include --with-magic-lib=/usr/local/lib/