Checking if a string is null
svv1999 at hotmail.com
Wed Jul 25 18:38:16 PDT 2007
Don Clugston wrote
> Take two arbitrary vectors with different directions, a and b.
> a*0 == b*0, even though the direction of a is completely different
> to that of b. This is the same model which is being used for
This is not true for arrays:
Take two arbitrary arrays with different directions, i.e. different
types, a and b: `(a ~ null) == (b ~ null)' is an error.
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