thisivan

Create Attributes Accessor Dynamically in Ruby¶ ↑

params.each do |key, value|
  self.instance_variable_set("@#{key}", value)
  self.class.send(:define_method, key, proc { self.instance_valiable_get("@#{key}") })
end

thisivan

find ./app/views/comments/ -name '*erb' | \
  xargs ruby -e 'ARGV.each { |i| puts "html2haml -r #{i} #{i.sub(/erb$/,"haml")}"}' | \
  bash

thisivan

Append to Files using Gsub¶ ↑

def gsub_file(relative_destination, regexp, *args, &block)
  path = destination_path(relative_destination)
  content = File.read(path).gsub(regexp, *args, &block)
  File.open(path, 'wb') { |file| file.write(content) }
end

thisivan

# Don't you ever use this on production environment
rake db:migrate:reset db:seed db:test:clone --trace

thisivan

CouchDB Snippets¶ ↑

Delete all your CouchDB databases:

rm -Rf /usr/local/var/lib/couchdb/*

URL to browse CouchDB databases: 127.0.0.1:5984/_utils

thisivan

#!/usr/bin/env ruby
require 'fileutils'

def fail!(msg = "Failure!")
  puts(msg)
  exit(1)
end

REPOSITORY_URL = 'git://github.com/mexpolk/homebrew.git'
PACKAGE_URL    = 'http://github.com/mexpolk/homebrew/tarball/master'

thisivan

# Rebase
$ git commit -a -m "Commit message"
$ git fetch
$ git rebase [branch] # origin/master
$ git push

# Stash
$ git stash
$ git pull
$ git stash apply

thisivan

# Random chars
chars = ('a'..'z').to_a + ('A'..'Z').to_a
(0...10).collect { chars[Kernel.rand(chars.length)] }.join
=> "nmhhuMrybz"

thisivan

require 'benchmark'

puts Benchmark.measure { "a"*1_000_000 }
0.060000   0.000000   0.060000 (  0.067556)
=> nil

n = 50000
Benchmark.bm do |x|
  x.report { for i in 1..n; a = "1"; end }
  x.report { n.times do   ; a = "1"; end }

thisivan

# = Mixin Template
# == Usage
# ActionController::Base.send :include, MixinModuleName

module MixinModuleName

  def self.included(recipient)
    recipient.extend(ClassMethods)
    recipient.class_eval do
      include InstanceMethods