jump.rb

require 'rubygems/user_interaction'

class Jump
  include Gem::UserInteraction
  
  def ask_me
    n = ask "key?"
  end
  
  def choose(lst)
    ret = ""
    if lst.length==1
      ret = lst.first
    else
      n = choose_from_list("#{lst.length} files", lst)
      ret = n.first
    end
    puts ret
  end

  trap("INT"){ exit }
end

j = Jump.new
home = File.expand_path "~/"
lib = File.expand_path "~/Library"
word = j.ask_me
res = (`mdfind 'kMDItemContentType == \"public.folder\" && kMDItemDisplayName == \"*#{word}*\"wcd'`).split("\n")
j.choose res.select{|x| x =~ /^#{home}/}.reject{|x| x=~ /^#{lib}/}