rsl

def body_class(string = nil)
  [string].tap do |names|
    # Standard
    names << controller_name << action_name
    # App-specific
    names << 'foo' if foo? # Et cetera
  end.compact.join ' '
end

rsl

$ rails console
Loading development environment (Rails 4.0.8)
irb(main):001:0> DateTime.new 0
=> Thu, 01 Jan 0000 00:00:00 +0000
irb(main):002:0> DateTime.new 1
=> Sat, 01 Jan 0001 00:00:00 +0000
irb(main):003:0> DateTime.new 2
=> Sun, 01 Jan 0002 00:00:00 +0000
irb(main):004:0> DateTime.new 3
=> Mon, 01 Jan 0003 00:00:00 +0000

rsl

get_values(form_elements_cache, question_element).inject(radio_buttons = "") do |radio_buttons, value_hash|
  html_options[:id] =  "#{id}_#{i += 1}"
  html_options[:onclick] = select_answer_event if follow_ups
  codes << {:id => html_options[:id], :code => value_hash[:code]}

  unless question_element.export_column.blank?
    cdc_attributes << {:id => html_options[:id], :export_conversion_value_id => value_hash[:export_conversion_value_id]}
  end

  selected_code = @object.radio_button_answer.include?(value_hash[:value]) ? value_hash[:code] : "" unless !selected_code.blank?

rsl

'original'.tap do |string|
  break string unless some_condition
  string.sub! /.*/, ''
  string << 'replacement'
end

rsl

class Sleigh
  USERS = {
    "Santa Claus": "Ho Ho Ho!"
  }
  
  def authenticate(name, password)
    USERS[name] == password 
  end
end

rsl

# Tip: If you name your gist foo.rb it will highlight the code as Ruby.
class Account
  # Two things here. First you never use the reader methods you define here.
  # You can either refactor the code to use them [see other gist]
  # or just remove them and keep using the instance variables.
  # Second, usually Rubyists [we have a name!] group class-level code 
  # like attr_reader or defining constants apart from the method definitions
  # with newlines. Multiple calls of similar types [like another attr_reader here]
  # would be back-to-back [no newlines] though. Just a readability thing.
  attr_reader :name, :balance

rsl

= form_for Comment.new do |f|
    = f.text_area :body
    = f.button t("button.submit")
    
- @video.comments.reverse.each do |comment|
  - next unless comment.persisted?
  %div{class: 'comment', id: "comment_#{comment.id}"}
    = simple_format comment.body

rsl

  def create
    # current_user = User.first
    if moment_params.empty?
      render status: 406, nothing: true and return
    else
      @moment = current_user.moments.build(moment_params)
      if @moment.save
         render "moments/show", status: 201
      else
        render status: 422, nothing: true # We should know about things like this.

rsl

  def insert_flash
    content_tag :div, class: 'flash' do 
      flash.each do |name, msg|
        add_flash name, msg
      end
    end
  end

private

rsl

  def self.find_by_ordered_ids(ids)
    order_by = ['case']
    ids.each_with_index do |id, index|
      order_by << "WHEN id='#{id}' THEN #{index}"
    end
    order_by << 'end'
    where(id: ids).order(order_by.join(' '))
  end