From: Pen Ttt <myocean135@...>
Date: 2010-04-06T12:03:45+09:00
Subject: the problem of to_yaml

here is a program
# MIT LICENSE
#
# Copyright (c) 2007 Soledad Penades www.soledadpenades.com
#
# Permission is hereby granted, free of charge, to any person obtaining
a copy
# of this software and associated documentation files (the "Software"),
to deal
# in the Software without restriction, including without limitation the
rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN
# THE SOFTWARE.

require 'rubygems'
require 'hpricot'
require 'open-uri'
doc =
Hpricot(open("http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/EXIF.html"))
#doc = open("EXIF.html") { |f| Hpricot(f) }

rows = []

(doc/"table.inner//tr").each do |row|
    cells = []
    (row/"td").each do |cell|

        if (cell/" span.s").length > 0
              values = (cell/"span.s").inner_html.split('<br
/>').collect{ |str|
              pair = str.strip.split('=').collect{|val| val.strip}
              Hash[pair[0], pair[1]]
            }

            if(values.length==1)
              cells << cell.inner_text
            else
              cells << values
            end

        elsif
            cells << cell.inner_text
        end
    end
    rows << cells

end

rows.shift

#p rows.to_yaml

File.open('/home/pt/test/hexif.yaml', 'w') { |f|
  f << rows.to_yaml
}
when i run ,
pt@pt-laptop:~$ ruby  /home/pt/test/row.rb
/home/pt/test/row.rb:61:in `block in <main>': undefined method `to_yaml'
for #<Array:0x9159ad0> (NoMethodError)
  from /home/pt/test/row.rb:60:in `open'
  from /home/pt/test/row.rb:60:in `<main>'

what's the matter?
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