Re: [MacPerl] going backwards

[Ken Williams <ken@forum.swarthmore.edu>]

A hash is the best solution in general.  Perhaps in your situation you'd be
better served by scrapping the arrays and just going with the hashes.  Or
perhaps there's something different about your situation that you're not
saying, but in general hashes are exactly what to use for the situation you
describe.

Nicholas.G.Thornton@directory.reed.edu (Nicholas G. Thornton) wrote:
>say we have an array like...
>     @weekdays = (mon, tues, wed, thurs, fri, sat, sun);
>....and we do $weekdays[0] we get "mon", no problems. But is there a
>simple way to go backwards from "mon" to get "0" without testing every
>value in the array? The best I've come up with so far is to have a
>hash...
> %weekdays = (mon => 0, tues => 1, wed => 2, thurs => 3, fri => 4, sat
> => 5, sun => 6);
>.... and do $weekdays{mon} to get "0". But for what I'm doing I'd like
>not to have an inverse hash for all the arrays.
>
>le meas,
>--Nick
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  -------------------                            -------------------
  Ken Williams                             Last Bastion of Euclidity
  ken@forum.swarthmore.edu                            The Math Forum



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