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def deep_merge(hash1, hash2)
  result = hash1.dup

  hash2.keys.each do |key|
    if hash2[key].is_a?(Hash) && hash1[key].is_a?(Hash)
      result[key] = deep_merge(hash1[key], hash2[key])
    else
      result[key] = hash2[key]
    end
  end

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# config/initializers/hacks.rb

Dir[Rails.root.join("lib/hacks/**/*.rb")].each { |file| require file }

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ruby_print = ->(a, b = 28, c = 1) { puts ("ruby" * a).center(b) * c } ; [[2, 14, 2], [3, 14, 2], 7, 7, 7, 6, 5, 4, 3, 2, 1].map { |i| ruby_print.call(*i) }

   rubyruby      rubyruby
 rubyrubyruby  rubyrubyruby
rubyrubyrubyrubyrubyrubyruby
rubyrubyrubyrubyrubyrubyruby
rubyrubyrubyrubyrubyrubyruby
  rubyrubyrubyrubyrubyruby
    rubyrubyrubyrubyruby
      rubyrubyrubyruby

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require "net/http"

def start_server
  # Remove the X to enable the parameters for tuning.
  # These are the default values as of Ruby 2.2.0.
  @child = spawn(<<-EOC.split.join(" "))
    XRUBY_GC_HEAP_FREE_SLOTS=4096
    XRUBY_GC_HEAP_INIT_SLOTS=10000
    XRUBY_GC_HEAP_GROWTH_FACTOR=1.8
    XRUBY_GC_HEAP_GROWTH_MAX_SLOTS=0

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ssh login@server.example.com -t "screen -DR session_name"

tmux -CC attach -t session_name || tmux -CC new -s session_name

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=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')

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# http://stackoverflow.com/questions/14972253/simpleform-default-input-class
# https://github.com/plataformatec/simple_form/issues/316

# Use this setup block to configure all options available in SimpleForm.
SimpleForm.setup do |config|
  config.boolean_style = :nested
  
  config.wrappers :bootstrap3, tag: 'div', class: 'form-group', error_class: 'has-error',
      defaults: { input_html: { class: 'default_class' } } do |b|
    

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Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.

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# HACK to enable using protected methods from Rails 4.2 and initial states as default attributes for ActiveRecord
module StateMachine
  module Integrations
    module ActiveModel
      public :around_validation
    end

    module ActiveRecord
      public :around_save

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require "net/http"
require "socket"

socket = "/tmp/portal2.sock"

sock = Net::BufferedIO.new(UNIXSocket.new(socket))
request = Net::HTTP::Get.new("/")
request.exec(sock, "1.1", "/")

begin