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Another example for arrays:
a=[1,2,3];
b=a;
a=[4,5,6];
// this means b is now [4,5,6] as well!
// or ...
a=[1,2,3];
b=+a;
a=[4,5,6];
// this means b is still [1,2,3]
--Doolittle 18:40, 8 July 2007 (CEST)