D Language Gotchas

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On Tuesday, 5 November 2013 at 02:59:55 UTC, Sumit Adhikari wrote:
>
>
> Dear All,
>
> I searched internet also I searched this forum for D Language 
> gotchas. In this forum, I found a thread which is from 2005 and 
> I do not know latest updates on that.
>
> My question is that - "Are there known programming gotchas of D 
> language ?"
>
> If will be grateful if I get some pointers.
>
> Regards, Sumit

One gotcha relates to enums. Writing `enum a = [0, 1, 2]` is a 
really bad idea, because everywhere you use a, it constructs a 
new array at runtime. The [0, 1, 2] is "pasted in", and you'll 
have a bunch of allocations you didn't expect. This doesn't just 
happen with arrays, but that's the most common case. What *is* 
okay is using string enums, as strings are a bit special due to 
being immutable.