undefined

unescape_unicode_yaml.rb

#! /usr/bin/env ruby

# unescape Unicode escaped YAML

# http://d.hatena.ne.jp/cesar/20070401/p1
module Unicode
  def escape(str)
    ary = str.unpack("U*").map!{|i| "\\u#{i.to_s(16)}"}
    ary.join
  end

  UNESCAPE_WORKER_ARRAY = []
  def unescape(str)
    str.gsub(/\\u([0-9a-f]{4})/) {
      UNESCAPE_WORKER_ARRAY[0] = $1.hex
      UNESCAPE_WORKER_ARRAY.pack("U")
    }
  end

  module_function :escape, :unescape
end

require 'yaml'

a = YAML.load_file(ARGV[0]) # Hash Array
puts "["
a.each do |h|
  i = 0
  print "{"
  h.each do |k,v|
    print " " if 0 < i
    print %{ "#{k}":"#{Unicode.unescape(v)}"}
    i+=1
    puts "," if h.length != i
  end
  puts
  print "}"
  puts "," if a.last != h
end
puts "]"