string <-> null/bool implicit conversion

[Jonathan M Davis via Digitalmars-d]

On Thursday, 20 August 2015 at 17:50:11 UTC, Steven Schveighoffer 
wrote:
> if(arr != null)

Definitely don't do that. IMHO, "== null and "!= null" should be 
illegal. If you really want to check for null, then you need to 
use "is null" or "!is null", whereas if you want to check that an 
array is empty, check its length or call empty. By using "== 
null" or "!= null", you tend to give the false impression that 
you're checking whether the object or array is null - which is 
not what you're actually doing.

- Jonathan M Davis