!in

[BCS]

Hello Michel,

> I agree that it'd be handy to have 'in' and '!in' work with arrays,
> especially with array literals:
> 
> if (x in [1,2,5,6,10]) do(something);
>
> Perhaps this syntax could be allowed but only for array literals. The
> reason being that array literals are usually short so a linear search
> wouldn't be too bad. Moreover, an array literal being a literal, it's
> easy for the compiler to optimize things; you're not constrained to a
> linear search.
>

How about expanding that to compile time constants of any kind. From that, 
even with long arrays, you should always be able to get n-log(n) performance 
(tree search) or better (translate it into a normal AA 'in' or even a perfect 
hash). 
 
-- 
... <IXOYE><