From: "meinrad.recheis" <my.name.here@...>
Date: 2003-08-07T23:45:52+09:00
Subject: Re: Elegant solution for a loop-break problem

raising an Exception is an excellent way of escaping nested loops.
- mr

On Thu, 7 Aug 2003 23:17:13 +0900, KONTRA Gergely 
<kgergely@mlabdial.hit.bme.hu> wrote:

> Hi!
>
> I've tried to write a little program, which detect duplicate files.
> My way to solve this is to have a hash for the known files like this
> { fileSize  => [[file1,file2],[file3,file4]],
> fileSize2 => [[file6,file7]] }
>
> So, file1..file4 have the same size, file1 and file2's content is
> identical, similarly file3 and file4 is identical.
>
> First, the Hash is empty, and then I insert the files to be examined,
> like this.
>
> files = Hash.new { [] }
> for filename in filesToBeAdded
> filesize=File.filesize(filename)
> for fn in filename[filesize]
> if equalContent(fn[0], filename)
> # add this file to this 'segment' TODO: alter files
> # next 'filename in filesToBeAdded'
> end
> end
> # if loop exited normally, create a new segment
> end
>
> So questions in general:
> How can I alter items in a hash nicely?
> Can I exit more loops with next/last/redo? (like in perl)
> Is there something similar to python's for .. else ... structure? (Do
> something, ONLY when the loop is terminated normally (without break)
>
> thx
> Gergo