From: Park Heesob <phasis@...>
Date: 2002-07-07T18:19:58+09:00
Subject: Re: Collapsing array output



"Bil Kleb" <W.L.Kleb@larc.nasa.gov> wrote in message
news:3D27DCC3.27D53F3D@LaRC.NASA.Gov...
> I recall discussion of something similar a while ago, but I cannot
> find it...
>
> I would like to consolidate the output of some arrays containing
> sequences of (string) numbers like,
>
>  3, 4, 5, 8, 10, 11, 15, 17
>
> to an output like,
>
>  3-5, 8, 10-11, 15, 17
>
> Can someone point me in the right direction?
>

My first try:
--------------------------------------
a = 3, 4, 5, 8, 10, 11, 15, 17
b = []
first = 0
while first<a.length
  last = first+1
  last += 1 while last<a.length && Range.new(a[first],a[last]).to_a ==
a[first..last]
  b << ( (first==last-1) ? "#{a[first]}" : "#{a[first]}-#{a[last-1]}" )
  first = last
end
puts b.join(', ')
----------------------------------------

> Thanks,
> --
> Bil
>

Park Heesob