From: Robert Klemme <shortcutter@...>
Date: 2010-05-14T01:35:11+09:00
Subject: Re: reading file after a particular line in file

On 13.05.2010 16:34, Une Bévue wrote:
> Robert Klemme<shortcutter@googlemail.com>  wrote:
>
>> There's also the flip flop operator:
>>
>> File.foreach "myfile" do |line|
>>     if /pattern/ =~ line .. false
>>       puts line
>>     end
>> end
>>
>> The trick I am using is that the FF operator starts to return true if
>> the first expression returns true and stays true until the last
>> expression returns true - in this case never since you want to read
>> until the end of the file.
>
> coud that trick be used for start and stop tags ? like :
>
> File.foreach "myfile" do |line|
>     if /<body/ =~ line .. /<\/body/ =~ line
>       puts line
>     end
> end
>
> if true, that's clever !

Yes, that could be done.  However, I would not use this for languages 
from the SGML family (XML, HTML) because there are no guarantees as to 
how many tags you'll find on a single line of text.  There are better 
tools do deal with that (REXML, Nokogiri...).

Kind regards

	robert

-- 
remember.guy do |as, often| as.you_can - without end
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