D dropped in favour of C# for PSP emulator

[Timon Gehr]

On 05/11/2012 10:29 PM, Jonathan M Davis wrote:
> On Friday, May 11, 2012 21:02:46 Alex Rønne Petersen wrote:
>> On 11-05-2012 20:34, Mehrdad wrote:
>>> On Friday, 11 May 2012 at 18:25:17 UTC, Jonathan M Davis wrote:
>>>>> Actually, that is a WAT even for somebody coming from C/C++.
>>>>
>>>> Really? That's pretty much exactly what I would have expected, and it
>>>> would
>>>> really suck if it returned a bool. It's like what you get with find on
>>>> std::map, only it's a pointer instead of an iterator.
>>>>
>>>> - Jonathan M Davis
>>>
>>> Again, try to see it from the perspective of a Python user, not a
>>> C++ user.
>>
>> Speaking of which, 'in' on arrays.........
>>
>> *hint hint*
>
> Except that it would break the generally expected algoritmic complexity of in,
> so it'll never happen ( O(n) for arrays, whereas the worst case that would be
> acceptable would be O(lg n) - e.g. what a binary tree could achieve).
>
> - Jonathan M Davis

The main use case I see is replacing tedious

if(foo == 'a' || foo == 'b' || foo == 'c' || foo == 'd') { ... }

with

if(foo in "abcd") { .... }

And here the counter-argument cannot apply, because the operation is in 
O(1).