gistfile1.rb

#!/usr/bin/ruby

require 'rubygems'
require 'pp'
require 'irb/completion'
require 'irb/ext/save-history'
ARGV.concat [ "--readline", "--prompt-mode", "simple" ]
IRB.conf[:SAVE_HISTORY] = 100
IRB.conf[:HISTORY_FILE] = "#{ENV['HOME']}/.irb-save-history"
IRB.conf[:AUTO_INDENT] = true

load File.dirname(__FILE__) + '/.railsrc' if $0 == 'irb' && ENV['RAILS_ENV'] 

# Method to pretty-print object methods
# Coded by sebastian delmont
# http://snippets.dzone.com/posts/show/2916
class Object
  ANSI_BOLD       = "\033[1m"
  ANSI_RESET      = "\033[0m"
  ANSI_LGRAY    = "\033[0;37m"
  ANSI_GRAY     = "\033[1;30m"
 
  # Print object's methods
  def pm(*options)
    methods = self.methods
    methods -= Object.methods unless options.include? :more
    filter = options.select {|opt| opt.kind_of? Regexp}.first
    methods = methods.select {|name| name =~ filter} if filter
 
    data = methods.sort.collect do |name|
      method = self.method(name)
      if method.arity == 0
        args = "()"
      elsif method.arity > 0
        n = method.arity
        args = "(#{(1..n).collect {|i| "arg#{i}"}.join(", ")})"
      elsif method.arity < 0
        n = -method.arity
        args = "(#{(1..n).collect {|i| "arg#{i}"}.join(", ")}, ...)"
      end
      klass = $1 if method.inspect =~ /Method: (.*?)#/
      [name, args, klass]
    end
    max_name = data.collect {|item| item[0].size}.max
    max_args = data.collect {|item| item[1].size}.max
    data.each do |item| 
      print " #{ANSI_BOLD}#{item[0].rjust(max_name)}#{ANSI_RESET}"
      print "#{ANSI_GRAY}#{item[1].ljust(max_args)}#{ANSI_RESET}"
      print "   #{ANSI_LGRAY}#{item[2]}#{ANSI_RESET}\n"
    end
    data.size
  end
end