Enter passwords in pry/irb without echo

part_of_irbrc.rb

require 'io/console' # requires ruby 1.9.3

module PasswordString
  def inspect; "[PASSWORD]"; end
  def to_s; "[PASSWORD]"; end
  def dup; obj=super;obj.extend PasswordString; obj; end
  def clone; obj=super;obj.extend PasswordString; obj; end
end

def password
  r = $stdin.noecho { gets.chomp }  
  r.extend PasswordString
  r
end
alias secret password