Extended maintenance of Ruby 1.9.3 ended on February 23, 2015. Read more
# File irb/completion.rb, line 214 def self.select_message(receiver, message, candidates, sep = ".") candidates.grep(/^#{message}/).collect do |e| case e when /^[a-zA-Z_]/ receiver + sep + e when /^[0-9]/ when *Operators #receiver + " " + e end end end