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require 'benchmark'

root_directories = Dir.glob("/*")

n = 5000
Benchmark.bm do |x|
  x.report("sort") do
    n.times{ root_directories.sort { |a, b| File.ctime(a) <=> File.ctime(b) } }
  end

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$ brew install ack
$ ack --version

Create ~/.ackrc (Below is my ackrc example, modify as you see fit)

# Options
--smart-case
--sort-files

Exclusions

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#!/bin/sh

# Update latest epel
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
sudo rpm -Uvh epel-release-6-8.noarch.rpm

# Download and build mosh
sudo yum -y install rpm-build rpmdevtools protobuf-compiler protobuf-devel libutempter-devel zlib-devel ncurses-devel openssh-clients perl-IO-Tty openssl-devel gcc gcc-c++ 
rpmdev-setuptree
cd ~/rpmbuild/SOURCES

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\A(\d{4})(-?)(\d{2})\2(\d{2})(?:[T\s-](\d{2})(:?)(\d{2})(?:\6(\d{2}))?)?\z

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#!/bin/bash

OK=0
WARNING=1
ERROR=2
UNKNOWN=3

used_space_limit=90

used_space=`df -k /dev/xvde1 | awk '{print $5}' | tail -1 | sed 's/%//g'`

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$ RUBYOPT="-r rubygems" gem install libv8 -v '3.3.10.4'

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# Credit: http://akrabat.com/computing/uninstalling-mysql-on-mac-os-x-leopard/
# Use mysqldump to backup your databases to text files!
# Stop the database server
sudo rm /usr/local/mysql
sudo rm -rf /usr/local/mysql*
sudo rm -rf /Library/StartupItems/MySQLCOM
sudo rm -rf /Library/PreferencePanes/My*
sudo sed -i '.bak' 's/^MYSQLCOM.*//g' /etc/hostconfig
rm -rf ~/Library/PreferencePanes/My*
sudo rm -rf /Library/Receipts/mysql*

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• brew install ctags
• Install ctags.vim bundle via git://github.com/vim-scripts/ctags.vim.git
• Add the following line to your .vimrc

let Tlist_Ctags_Cmd="/usr/local/bin/ctags"
let Tlist_WinWidth=50
map <F8> :!/usr/local/bin/ctags -R --c++-kinds=+p --fields=+iaS --extra=+q .<CR>
map <F4> :TlistToggle<cr>

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brew install fontforge
mkdir ~/.fonts
wget -P ~/.fonts https://gist.github.com/baopham/1838072/raw/5fa73caa4af86285f11539a6b4b6c26cfca2c04b/Monaco%20for%20Powerline.otf
git clone https://github.com/Lokaltog/vim-powerline.git /tmp/vim-powerline
cd /tmp/vim-powerline && fontforge -script fontpatcher/fontpatcher ~/.fonts/Monaco+for+Powerline.otf

echo -e "set encoding=utf-8\nset guifont=Monaco-Powerline\nlet g:Powerline_symbols = 'fancy'" >> ~/.vimrc

# And make sure you install Monaco-Powerline.otf on Mac and use that font for your Terminal/iTerm app as well

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Problem:

We have the following Parallel block which spin up multiple parallel processes

  Parallel.map(
    servers,
    :in_processes     => servers.size,
    :preserve_results => false,
 ) do |server|