From: Robert Klemme <shortcutter@...>
Date: 2010-12-07T23:15:39+09:00
Subject: Re: Split version requirements

On Tue, Dec 7, 2010 at 6:47 AM, Ammar Ali <ammarabuali@gmail.com> wrote:
> On Tue, Dec 7, 2010 at 7:20 AM, Intransition <transfire@gmail.com> wrote:
>> Of course, just my luck it doesn't work in Ruby 1.8 :-(
>
> I should have mentioned that.
>
> Just a thought, I suspect you might have already considered, why not
> just use match instead of split?
>
>>> /(\w+)\s+([>=<]\s*\d+\.\d+)\s+([>=<]\s*\d+\.\d+)/.match("rake > 0.8 < 1.0").captures
> [ "rake", "> 0.8", "< 1.0" ]
>
> Sure it's long and not as elegant as split, but it's clear, I think,
> explicit, and cross-version compatible.

+1

And if it is too long to read easily we can always use /x:

%r{
  \A
  # leading word:
  (\w+)
  \s+
  # 1st version no:
  ([>=<] \s* \d+(?:\.\d+)+)
  \s+
  # 2nd version no:
  ([>=<] \s* \d+(?:\.\d+)+)
}x.match ...

Cheers

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/