From: Todd Benson <caduceass@...>
Date: 2007-11-08T13:11:23+09:00
Subject: Re: how to delete array

On Nov 7, 2007 9:47 PM, ara.t.howard <ara.t.howard@gmail.com> wrote:
>
> On Nov 7, 2007, at 1:40 PM, Surjit Nameirakpam wrote:
>
>
> > Surjit Nameirakpam wrote:
> >> My business logic doesn't help me find which values i have to
> >> delete but
> >> i will know what are the indexes i have to delete.
> >
> > Actually i have collected the indexes i have to delete in an array
> >
> > e.g
> >
> > Array1 = [1,2,3,4,7,4]
> >
> > indexes to be delted is collected in an array del=[1,3] ..i.e i should
> > delete 2 and 4 values
> >
> > i tried using
> >
> > Array1.delete_at(del[])
> >
> > but this doesn't work
> > --
> > Posted via http://www.ruby-forum.com/.
> >
>
> cfp:~ > cat a.rb
> array = 1, 2, 3, 4, 7, 4
>
> index = 1, 3
> i = -1
> array.delete_if{ index.delete(i+=1) }

This is excellent!  Only, what if your underlying implementation does
not traverse an array in order with #delete_if ?  As it turns out, it
does, but would it have to?  I see #delete_if as a conditional that
has nothing to do with the Array's ordering, so I was a little
surprised at this assumption.

Todd