snip.rb

# This would go within your ~/.irbrc file
# 
# The idea behind this is that you can store blocks of code not within clipboard or a 
# misc. file, but within IRB, when hacking at code
#
# Snip is a singleton class that holds all your snippets for the current session
# An instance method 'snip' was also added to Object to allow for super-simple snip creation
#
# Here's a demo from IRB
#
# >> snip :test do
# ?> puts 1 + 2
# >> end
# => [:test]
# >> snip :test
# 3
# => nil
# >> snip :new_user do
# ?> User.new do |u|
# ?> u.first_name = "Josh"
# >> u.last_name = "Clayton"
# >> u.email = "[email protected]"
# >> end
# >> end
# => [:test, :new_user]
# >> snip :new_user
# => #<User id: nil, email: "[email protected]", login: nil, crypted_password: nil, salt: nil, remember_token: nil, activation_code: nil, state: "passive", first_name: "Josh", last_name: "Clayton", activated_at: nil, remember_token_expires_at: nil, deleted_at: nil, created_at: nil, updated_at: nil>
#
# Obviously, this is pretty beneficial if you're dealing with a block of code that you want to reuse; most other stuff can be done with IRB history

class Snip
  class SnippetNotFoundError < StandardError; end
  
  @@snips = {}
  
  def self.create(name, &blk)
    @@snips[name.to_s] = blk
    @@snips.keys
  end
  
  def self.[](name)
    raise SnippetNotFoundError, "the snippet '#{name.to_s}' was not found" unless @@snips.has_key?(name.to_s)
    @@snips[name.to_s].call
  end
  
  def self.clear
    @@snips.clear
  end
  
  def self.snips
    @@snips
  end
end

class Object
  def snip(name, &blk)
    if block_given?
      Snip.create(name, &blk)
    else
      Snip[name]
    end
  end
end