From: Leslie Viljoen <leslieviljoen@...>
Date: 2007-11-08T05:24:17+09:00
Subject: Re: how to delete array

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On Nov 7, 2007 10:02 PM, Surjit Nameirakpam <surjit.meitei@gmail.com> wrote:

> Problem
>
> consider an array
>
> a = [1,4,6,7,9,8]
>
> I want to delete the array value w.r.t index
>
> e.g i want to delte 0,4,6 element in one go
>
> I can use the command
> a.delete_at(0)
> a.delete_at(4)
> a.delete_at(6)


Mostly when I have a problem like this, I find that the indexes I want to
delete are a list generated by some property of the elements. ie. perhaps
you want to delete indexes 0, 4, 6 because the elements at those indexes are
(say) larger than three.

In that case, there's a much cleaner way:
a.reject!{|e| e > 3}

If you can say how you calculate that list of indexes to delete, we may be
able to help better.

Les


-- 
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