Associative array entry in Wikipedia

[Philippe Lhoste <PhiLho@...>]

Reading the page on associative arrays in Wikipedia
<http://en.wikipedia.org/wiki/Associative_array>,
I noticed there was no Lua entry...
So I added my own.
Feel free to revise it if needed.

--
Philippe Lhoste
--  (near) Paris -- France
--  http://Phi.Lho.free.fr
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