code is required by aaron patterson

vagrant@precise64:~/data$ pry
[1] pry(main)> gem_original_require "eventmachine"
LoadError: cannot load such file -- eventmachine
from (pry):1:in `require'
[2] pry(main)> gem "eventmachine"
=> true
[3] pry(main)> gem_original_require "eventmachine"
=> true
[4] pry(main)> EventMachine
=> EventMachine
[5] pry(main)> 

• call-seq:

• require(name)    -> true or false
  

• Loads the given +name+, returning +true+ if successful and +false+ if the
• feature is already loaded.
• If the filename does not resolve to an absolute path, it will be searched
• for in the directories listed in $LOAD_PATH ($:).
• If the filename has the extension ".rb", it is loaded as a source file; if
• the extension is ".so", ".o", or ".dll", or the default shared library
• extension on the current platform, Ruby loads the shared library as a
• Ruby extension. Otherwise, Ruby tries adding ".rb", ".so", and so on
• to the name until found. If the file named cannot be found, a LoadError
• will be raised.
• For Ruby extensions the filename given may use any shared library
• extension. For example, on Linux the socket extension is "socket.so" and
• require 'socket.dll' will load the socket extension.
• The absolute path of the loaded file is added to
• $LOADED_FEATURES ($"). A file will not be
• loaded again if its path already appears in $". For example,
• require 'a'; require './a' will not load a.rb
• again.
• require "my-library.rb"
• require "db-driver"
• Any constants or globals within the loaded source file will be available
• in the calling program's global namespace. However, local variables will
• not be propagated to the loading environment.

vagrant@precise64:~/data$ cat foo.rb 
require 'bar'
puts a
vagrant@precise64:~/data$ cat bar.rb 
a = 12
vagrant@precise64:~/data$ ruby -I . foo.rb
foo.rb:2:in `<main>': undefined local variable or method `a' for main:Object (NameError)