From: dblack@...
Date: 2006-11-27T00:23:09+09:00
Subject: Re: find index of first non zeo value in array

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Hi --

On Sun, 26 Nov 2006, Olivier wrote:

> Le dimanche 26 novembre 2006 15:00, Josselin a =E9crit=A0:
>> with :
>> array =3D [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 21, 0, 0, 0, 0,
>> 0, 0, 0, 0, 0, 0]
>>
>> I wrote :
>> array.index(array.detect {|x| x > 0})    =3D> 15
>>
>> is there a better and simpler way to do it ?
>> thanks
>>
>> joss
>
> In that case, it is simpler to use an external counter, i think :
>
> c =3D 0
> array.each{|v| break if not v.zero?; c +=3D 1}
> puts c # =3D> 15

Or:

   c =3D array.each_with_index {|e,i| break i unless e.zero? }


David

--=20
                   David A. Black | dblack@wobblini.net
Author of "Ruby for Rails"   [1] | Ruby/Rails training & consultancy [3]
DABlog (DAB's Weblog)        [2] | Co-director, Ruby Central, Inc.   [4]
[1] http://www.manning.com/black | [3] http://www.rubypowerandlight.com
[2] http://dablog.rubypal.com    | [4] http://www.rubycentral.org
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