From: Bernard Kenik <renard@...>
Date: 2007-07-21T05:16:13+09:00
Subject: Re: line.split with some complicating factors...

Marc Hoeppner wrote:
> 
>> ranges = str.scan(/(\d+)\.\.(\d+)/).map {|a,b| a.to_i..b.to_i }
>> betweens = str.scan(/(\d+),(\d+)/).map {|a,b| (a.to_i+1)..b.to_i-1 }
>> 
>> 
>> David
> 
> Took me a bit, but got it working - perfect, thanks a lot!

an alternate way which might be clearer would

a = 50586..50639,50795..51859,60005..60058,60256..61236
b = []
0.upto(a.size - 2) do |i|
  c = a[i].last + 1
  d = a[i+1].first - 1
  b << (c..d)
end

p a  =>
[50586..50639, 50795..51859, 60005..60058, 60256..61236]

p b  =>
[50640..50794, 51860..60004, 60059..60255]

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