From: Josh Cheek <josh.cheek@...>
Date: 2011-09-05T00:21:41+09:00
Subject: Re: loops problem

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On Sun, Sep 4, 2011 at 9:45 AM, jack jones <shehio_22@hotmail.com> wrote:

> I've read about the method which inserts some element in a certain place
> ..
> what I wanted to do is to shift all the elements to the back .. not
> inserting which will require rather complicated operation like deleting
> the element after shifting it .... I really don't understand the line
> you wrote, thank you :)
>
> --
> Posted via http://www.ruby-forum.com/.
>
>
Insert nil. There are lots of options for docs.
rdoc.info: http://rdoc.info/stdlib/core/1.9.2/Array#insert-instance_method
ruby-doc.org: http://ruby-doc.org/core/classes/Array.html#M000230

And you can't have an array with a "gap" in it. ie what is returned if you
access that index after you've shifted the elements? The obvious answer is
nil, so just insert nil:

array = (0..10).to_a
counter = 5
array.insert counter, nil
array # => [0, 1, 2, 3, 4, nil, 5, 6, 7, 8, 9, 10]

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