Creating a list with holes

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Date	Fri, 3 Jan 2014 10:19:09 -0500
Subject	Creating a list with holes
From	Larry Martell <larry.martell@gmail.com>
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I think I know the answer is no, but is there any package that allows
creating a list with holes in it? E.g. I'd want to do something like:

x[10] = 12
x[20] = 30

I'm thinking of something like defaultdict but for lists (I know
that's very different, but ... )

Thanks!
-larry

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Thread

Creating a list with holes Larry Martell <larry.martell@gmail.com> - 2014-01-03 10:19 -0500
  Re: Creating a list with holes eneskristo@gmail.com - 2014-01-03 07:30 -0800
    Re: Creating a list with holes Larry Martell <larry.martell@gmail.com> - 2014-01-03 10:41 -0500
      Re: Creating a list with holes Denis McMahon <denismfmcmahon@gmail.com> - 2014-01-03 18:07 +0000
        Re: Creating a list with holes Larry Martell <larry.martell@gmail.com> - 2014-01-03 19:15 -0500
          Re: Creating a list with holes Roy Smith <roy@panix.com> - 2014-01-03 20:18 -0500
            Re: Creating a list with holes Denis McMahon <denismfmcmahon@gmail.com> - 2014-01-04 02:03 +0000
  Re: Creating a list with holes Roy Smith <roy@panix.com> - 2014-01-03 10:38 -0500
    Re: Creating a list with holes Chris Angelico <rosuav@gmail.com> - 2014-01-04 02:46 +1100

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