From: Admin Tensor <lists@...>
Date: 2012-08-13T03:39:15+09:00
Subject: Re: Delete a lines from a files

Robert Klemme wrote in post #1072104:
>> ruby -e 'BEGIN{$/=nil}; puts STDIN.readlines.to_s.gsub(/^john.*$/, "")'
>> < your_file
>
> Why do you set the input record separator to nil?  How then should
> readlines work?  Also, I hope you are aware that readlines will read
> in the whole input before outputting anything.  This is quite
> inefficient for medium to large files.   ARGF might be better, too.

Well, I haven't tried the code yet.  For your questions, probably better
to ask Dave Thomas... :)  I took it from his one liners.

Regards,

Bill

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