From: matt@... (matt neuburg)
Date: 2006-11-27T05:25:14+09:00
Subject: Re: How to re-name a file  from Ruby script

Li Chen <chen_li3@yahoo.com> wrote:

> Hi all,
> 
> I have a folder containing many files with format
> LIPID5-2.001
> LIPID5-2.002
> ..
> LIPID5-2.200
> 
> I want to change all of them into
> LIPID5-3.001
> LIPID5-3.002
> ..
> LIPID5-3.200
> 
> I write a script as follows. Based on the screen output the filename is
> changed. But I go to the same folder and find the original file
> LIPID5-2.001 is still there and there is no file called LIPID5-3.001.
> Any comments?
> 
> Thanks,
> 
> Li
> 
> ##
> path='C:\Ruby\self'
> 
> Dir.entries(path).each do |filename|
> 
>  if filename=~/(LIPID5-2)(\.\w+)/i
>    p filename.gsub!(/LIPID5-2/,'LIPID5-3')
>  end

You're changing a variable called filename but you're not also talking
to the filesystem and asking it to change the name of the file on disk.
For that, you want something like File.rename.

m.

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