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  2. RPG400-L
  3. December 2004

RE: Compute Hash Code

Hi,

On Wed, 8 Dec 2004, Walden H. Leverich wrote:
> array = '100', '220', '300', '400', '500'
> hash = (100 * 1) + (220 * 2) + (300 * 3) + (400 * 4) + (500 * 5) = 5540
> array = '100', '200', '300', '410', '500'
> hash = (100 * 1) + (200 * 2) + (300 * 3) + (410 * 4) + (500 * 5) = 5540
>
> Two different arrays, same hash. Ooops.


This is a very good illustration of why I wouldn't try to invent my own
hash code.  I'd use MD5 or something else that's been well-used and
well-tested.

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