From: "Wolfgang Nádasi-donner" <wonado@...>
Date: 2007-07-22T10:25:09+09:00
Subject: Re: line.split with some complicating factors...

Marc Hoeppner wrote:
> a line contains a list of coordinates (specifying a range) separated by
> a ","  like so:
> 
> 50586..50639,50795..51859,60005..60058,60256..61236
> 
> Now, a way this could look like would be:
> 
> E50586..50639,50640..50795,E50795..51859,..

I see that the problem is already solved, but in Ruby I always have the 
feeling, that there must be something like a "one-liner" for nearly all 
problems.

Unfortunately I ended only with "something" like a one-liner.

>>>>> code >>>>>
intxts = [ "50586..50639,50795..51859,60005..60058,60256..61236",
           "0..10,50000..50100,50101..51000,60005..60058,60059..61236" ]
def put(a);(a = a.push(a.shift))[0];end
intxts.each do |intxt|
  pre = ['', 'E']
  p intxt.split(',').collect{|e|e.split('..').collect{|v|Integer(v)}}.
    inject([[],0]){|c,e|
      c[1]==0 ? (c[0]<<e;c[1]=e[1]+1) : (
      c[1]==e[0] ? (c[0]<<[0,0]<<e) : (c[0]<<[c[1],e[0]-1]<<e)
      c[1]=e[1]+1);c
    }.at(0).collect{|r|put(pre)+r.join('..')}.join(',').gsub(/0\.\.0,/,'')
end
>>>>> result >>>>>
"E50586..50639,50640..50794,E50795..51859,51860..60004,E60005..60058,60059..60255,E60256..61236"
"E0..10,11..49999,E50000..50100,E50101..51000,51001..60004,E60005..60058,E60059..61236"
>>>>> end of example >>>>>

Sorry, but it is a Ruby generated addiction...

Wolfgang Nádasi-Donner

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