From: Tobias Reif <tobiasreif@...>
Date: 2002-02-11T18:17:21+09:00
Subject: array diff

Hi,

I need to get the difference of two arrays; more precisely, the rest of 
their intersection.

Here,

[1,2,3] - [3,1]
-> [2]

I get what I want,
and also here

[1,2,3,3] - [3,3,1]
-> [2]

But here,

[1,1,1] - [1,1]
-> []

I need to get [1].

Tobi

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