brianjlandau

module Enumerable
  def deep_freeze
    unless self.is_a? String
      frozen = self.dup.each do |key, value|
        if (value.is_a?(Enumerable) && !value.is_a?(String))
          value.deep_freeze
        else
          value.freeze
        end
      end

zhengjia

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

huy

# USAGE: Hash.from_xml(YOUR_XML_STRING)require 'rubygems'
require 'nokogiri'
# modified from http://stackoverflow.com/questions/1230741/convert-a-nokogiri-document-to-a-ruby-hash/1231297#123129
7

class Hash
  class << self
    def from_xml(xml_io)
      begin
        result = Nokogiri::XML(xml_io)

mattetti

module Excel
  module Formulas  
    def pmt(rate, nper, pv, fv=0, type=0)
      ((-pv * pvif(rate, nper) - fv ) / ((1.0 + rate * type) * fvifa(rate, nper)))
    end

    def ipmt(rate, per, nper, pv, fv=0, type=0)
      p = pmt(rate, nper, pv, fv, 0);
      ip = -(pv * pow1p(rate, per - 1) * rate + p * pow1pm1(rate, per - 1))
      (type == 0) ? ip : ip / (1 + rate)

afeld

# Parses YouTube URLs directly or from iframe code.  Handles:
# * Address bar on YouTube url (ex: http://www.youtube.com/watch?v=ZFqlHhCNBOI)
# * Direct http://youtu.be/ url (ex: http://youtu.be/ZFqlHhCNBOI)
# * Full iframe embed code (ex: <iframe src="http://www.youtube.com/embed/ZFqlHhCNBOI">)
# * Old <object> tag embed code (ex: <object><param name="movie" value="http://www.youtube.com/v/ZFqlHhCNBOI">...)

/(youtu\.be\/|youtube\.com\/(watch\?(.*&)?v=|(embed|v)\/))([^\?&"'>]+)/
$5 #=> the video ID

# test it on Rubular: http://rubular.com/r/eaJeSMkJvo

bsodmike

ENV["RAILS_ENV"] = "test"
require File.expand_path('../../config/environment', __FILE__)
require 'rails/test_help'
require 'minitest/autorun'
require 'minitest/pride'
require 'capybara/rails'


class MiniTest::Spec
  include ActiveSupport::Testing::SetupAndTeardown

scy

How to delete a file from a Git repository, but not other users' working copies

Suppose you have, by mistake, added your IDE's project folder (you know, these .idea folders with all kinds of local paths and configuration data and settings in it) to the Git repository of your project. (We're talking about a whole folder here, but the same rules apply to individual files as well.)

Of course, you only realize that two days after the fact and have already pushed it, and your colleagues have already pulled it. They use the same IDE as you do, so whenever they change a setting or fix paths, they can either

• commit that, causing nasty merge conflicts for you and others or
• ignore the changes and carry around a modified file until the end of time without ever committing it.

Why .gitignore won't help

chikadance

module ChunkyPNG
  class Canvas
    
    # The ChunkyPNG::Canvas::Operations module defines methods to perform operations
    # on a {ChunkyPNG::Canvas}. The module is included into the Canvas class so all
    # these methods are available on every canvas.
    #
    # Note that some of these operations modify the canvas, while some operations return 
    # a new canvas and leave the original intact.
    #

tadast

# 1) Create your private key (any password will do, we remove it below)

$ cd ~/.ssh
$ openssl genrsa -des3 -out server.orig.key 2048


# 2) Remove the password

$ openssl rsa -in server.orig.key -out server.key

geekmanager

Making git use Sublime Text

First up, let's make Sublime Text 2 available from the command line in terminal, by creating a link to subl which is the launcher from terminal:

ln -s /Applications/Sublime\ Text\ 2.app/Contents/SharedSupport/bin/subl /usr/local/bin/sublime

(added bonus of this approach is when you upgrade to ST3 or change text editor, you can just redirect the symlink).

If there's any chance that bash doesn't check usr/local/bin then use [Launch Sublime Text 2 from Mac OSX Terminal] for more detailed instructions on how to make this happen.