From: Jeremy Bopp <jeremy@...>
Date: 2010-12-07T14:32:57+09:00
Subject: Re: Split version requirements

On 12/06/2010 11:20 PM, Intransition wrote:
> On Dec 7, 12:07 am, Ammar Ali <ammarabu...@gmail.com> wrote:
>> In that case:
>>
>>>> "rake >0.8 <1.0".split(/(?<![>=<])\s+/)
>>
>> [ "rake", ">0.8", "<1.0" ]>> "rake > 0.8 < 1.0".split(/(?<![>=<])\s+/)
>>
>> [ "rake", "> 0.8", "< 1.0" ]
> 
> Cool, I've never seen '?<!' before. Thanks for the tip.
> 
> Of course, just my luck it doesn't work in Ruby 1.8 :-(

Convert the negative lookbehind assertion into a positive lookahead
assertion:

irb(main):001:0> "rake >0.8 <1.0".split(/\s+(?=[>=<])/)
=> ["rake", ">0.8", "<1.0"]
irb(main):002:0> "rake > 0.8 < 1.0".split(/\s+(?=[>=<])/)
=> ["rake", "> 0.8", "< 1.0"]

-Jeremy