boolean over multiple variables

[BCS]

Hello Nick,

> "Pelle Månsson" <pelle.mansson at gmail.com> wrote in message
> news:hjmmod$1iok$1 at digitalmars.com...
> 
>> I think in should work for keys in an associative array and for
>> values in a regular array.
>> 
>> This is how it works in python.
>> 
> Aside from that being how Python does it, why do you see that as
> preferable? I see both arrays and associative arrays as things that
> map an input value to an output value. The only significant
> differences are the implementation details, and the fact that regular
> arrays are more restrictive in their sets of valid inputs (must be
> integers, must start with 0, and must all be consecutive values). So
> having a single syntax work on the outputs for regular arrays, but
> then on the inputs for AAs, seems highly inconsistent and error-prone
> to me.

I think this is one of the few cases where the strictly logical choice is 
not the way anyone expect things to work.

That said however, it might make a difference in template code

void fn(T)(T t, T u, int i)
{
    if(auto x = i in t) u[i] = *x; 
}
 
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<IXOYE><