From: Axel Etzold <AEtzold@...>
Date: 2007-10-03T16:59:41+09:00
Subject: Re: Searching through a sorted array


-------- Original-Nachricht --------
> Datum: Wed, 3 Oct 2007 16:50:03 +0900
> Von: FireAphis <FireAphis@gmail.com>
> An: ruby-talk@ruby-lang.org
> Betreff: Re: Searching through a sorted array

> On Oct 3, 9:30 am, Peter Szinek <pe...@rubyrailways.com> wrote:
> > FireAphis wrote:
> > > Hello,
> >
> > > I have a very big array of objects sorted by one of its numeric data
> > > members. During the flow of my application I need occasionally to get
> > > all the elements in a specific range.
> >
> > Then why not
> >
> > my_array[start..end] ?
> >
> > Cheers,
> > Peter
> > __http://www.rubyrailways.comhttp://scrubyt.org
> 
> Sorry if my explanation has been misleading. The array isn't
> necessarily comprised of continuous or consecutive numbers. Moreover
> they don't necessarily start from zero. For example:
> 
> my_array = [-100, -99, -2, 0, 3, 125, 1742, 1234568763]
> 
> now I want to get all the elements bigger than 1 and smaller than
> 1000. AFAIK my_array[1..1000] doesn't help in this case.
> 
In that case, you can say:

interesting_array=my_array.delete_if{|entry|  entry>1000 or entry<1}

Best regards,

Axel 
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