gistfile1.rb

# From rails/activesupport/lib/active_support/dependencies.rb:333
# Ulysses forgets standard library, complains instead:
# http://dev.rubyonrails.org/changeset?new=trunk%2Factivesupport%2Flib%2Factive_support%2Fdependencies.rb%404728&old=trunk%2Factivesupport%2Flib%2Factive_support%2Fdependencies.rb%404681

# Search for a file in load_paths matching the provided suffix.
def search_for_file(path_suffix)
  path_suffix = path_suffix + '.rb' unless path_suffix.ends_with? '.rb'
  load_paths.each do |root|
    path = File.join(root, path_suffix)
    return path if File.file? path
  end
  nil # Gee, I sure wish we had first_match ;-)
end

# Hint: you were looking for Array#find.
# http://www.ruby-doc.org/core/classes/Enumerable.html#M003122