Squeak's Method Finder for Ruby

After user post aovoe wanted something similar for ruby. Hastily, a code was thrown that can search by selectors without arguments (for example, "hello" .upcase).
Examples:

  irb (main): 001: 0> "hello" .suggest_method ("HELLO")
  => ["upcase", "swapcase"]
  irb (main): 002: 0> "hello" .suggest_method ("Hello")
  => "capitalize"
  irb (main): 007: 0> Date.parse ('13 Sep 2009 '). suggest_method (256) # Programmer's Day
  => "yday"
  irb (main): 009: 0> 1.01.suggest_method (1)
  => ["prec_i", "round", "truncate", "to_i", "to_int", "floor"]
  irb (main): 010: 0> 1.01.suggest_method (2)
  => "ceil"

MethodFinder can take into account several results, for example:

  irb (main): 011: 0> MethodFinder.suggest_method (-1.01 => -2, 1.01 => 1)
  => "floor"
  irb (main): 001: 0> MethodFinder.suggest_method (-1.01 => -1, 1.01 => 1)
  => ["to_int", "round", "to_i", "prec_i", "truncate"]

Update:
Now on selectors with arguments

  irb (main): 005: 0> "hello" .suggest_method ("hello world", "world")
  => ["+", "concat", "<<"]
  irb (main): 003: 0> MethodFinder.suggest_method ([2, 4, 2], [[2], [2, 2], 2])
  ./method_finder.rb:20: warning: do not use Fixnums as Symbols
  => "*"

Sailors on github: github.com/mholub/method_finder/tree/master

Update:
This is a bicycle, because a lot of people have written analogs, for example, andy@nobugs.org
www.nobugs.org/developer/ruby/method_finder.html
Improved version :
redhanded.hobix.com/inspect/stickItInYourIrbrcMethodfinder.html