From: Mike Dvorkin <mike@...>
Date: 2006-09-14T14:14:57+09:00
Subject: Re: Question about 'unless' (negated if)

In your example "unless" is applicable only to the line it appears  
in. Synonym of "unless" is "if not", i.e.:

ftp.get(str) if str.index('d') != 0

Mike Dvorkin
http://www.rubywizards.com



On Sep 13, 2006, at 5:28 PM, Lincoln Anderson wrote:

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> Using this snippet:
>
>     dir.each { |str|
>         ftp.get(str) unless str.index('d') == 0
>         system("mkdir " + lpath + str.split('/').index(str.length-1))
>         system("cd " + lpath + str.split('/').index(str.length-1))
>         }
>
>
> Will system be called both times all the time, or will the first one
> be called only when the unless condition is satisfied, or will both
> calls only be enacted when the unless condition is satisfied?  I've
> seen examples that used else statements with unless calls, but I'm not
> sure if this is needed here or not.  Unless is new to me :)
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