The problem of to_yaml

here is a program

MIT LICENSE

Copyright (c) 2007 Soledad Penades www.soledadpenades.com

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IN

THE SOFTWARE.

require ‘rubygems’
require ‘hpricot’
require ‘open-uri’
doc =
Hpricot(open(“EXIF Tags”))
#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

what’s the matter?

Did you:

require ‘yaml’