As configured in my dotfiles.
start new:
tmux
start new with session name:
class Entity | |
include DataMapper::Resource | |
property :enum_property, Enum[:a, :b, :c] | |
end | |
Entity.enum_property.options[:flags] #=> [:a, :b, :c] | |
# or | |
Entity.enum_property.flag_option.values #=> [:a, :b, :c] |
brew update | |
brew versions FORMULA | |
cd `brew --prefix` | |
git checkout HASH Library/Formula/FORMULA.rb # use output of "brew versions" | |
brew install FORMULA | |
brew switch FORMULA VERSION | |
git checkout -- Library/Formula/FORMULA.rb # reset formula | |
## Example: Using Subversion 1.6.17 | |
# |
#!/usr/bin/env sh | |
## | |
# This is script with usefull tips taken from: | |
# https://github.com/mathiasbynens/dotfiles/blob/master/.osx | |
# | |
# install it: | |
# curl -sL https://raw.github.com/gist/2108403/hack.sh | sh | |
# |
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 |
NameVirtualHost 127.0.0.1:80 | |
<VirtualHost 127.0.0.1:80> | |
ServerName pow | |
ServerAlias *.dev | |
ServerAlias *.xip.io | |
ProxyPass / http://localhost:20559/ | |
ProxyPassReverse / http://localhost:20559/ | |
ProxyPreserveHost On |
As configured in my dotfiles.
start new:
tmux
start new with session name:
# Hello, and welcome to makefile basics. | |
# | |
# You will learn why `make` is so great, and why, despite its "weird" syntax, | |
# it is actually a highly expressive, efficient, and powerful way to build | |
# programs. | |
# | |
# Once you're done here, go to | |
# http://www.gnu.org/software/make/manual/make.html | |
# to learn SOOOO much more. |
This is my best try at transcribing of the lightning talk I gave at RUG::B on April 2016. Due to poor time management (LOL) the delivery was rushed and some examples were skipped, I hope having them posted here makes them more useful.
xargs
is a small but very useful program that is installed in most if not all of your computers¹. Many of you probably know it. Those who don't will learn something really useful, but those who do will learn a couple of cool tricks, too.
You might have heard about the Unix philosophy: