From: Robert Klemme <shortcutter@...>
Date: 2009-04-29T14:50:02+09:00
Subject: Re: Random Access using IO#pos in code blocks

On 28.04.2009 22:32, Arun Kumar wrote:
> Hello everyone,
>   I'm 20 days new to Ruby, please forgive if I make any mistakes. I'm
> on a project where I'm indexing certain words in a text document. So
> I'm also storing the file position where the word occurs. But the
> Problem is:
>     The IO#pos points to the end of the file all the while... Below is
> the code I'm working on:
> 
> File.open(file_name) do  |f|
> 
>  f.readlines("\r\n\r\n").each do |para|

The reason is in the line above.

>    para.scan(/\b\w+\b/).each do |word|
> 
>      word = word.downcase.stem
>      if (!stoplist.include? word) && (!word.empty?) #excludes empty
> and frequent words
> 
>          unless freq.has_key?(word)
>            freq[word] = [1,f.pos,file_name] # freq is a hash, that
> stores an array containing index, position of word (THE PROBLEM)..
>         else
>           freq[word].to_a[0] += 1
>            freq[word].to_a<< f.pos << file_name
>         end
> 
>          unless wfreq.has_key?(word)
>           wfreq[word] = [1,f.pos,file_name]
>         else
>           wfreq[word].to_a[0] += 1
>           wfreq[word].to_a<< f.pos << file_name
>         end
> 
>      end
>    end
> end
> 
> 
>   File.open(file_name+".yaml","w"){|f| YAML.dump(freq,f)}
> 
>  Also it would be great if someone told me the replacement for the
> deprecated 'to_a' method used above :)

Why do you convert an Array into an Array?

Kind regards

	robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/