On Fri, Sep 26, 2014 at 02:01:22PM -0400, Steven Schveighoffer via Digitalmars-d-learn wrote: > On 9/25/14 8:24 PM, AsmMan wrote: [...] > >It made me a bit confusing. How is the implementation of string > >comparasion in D? (if someone could point to actual code used in > >these comparasion would be really great otherwise I'll check out > >assembly output, maybe) in no language I know of (including C#) > >"" == null is true [...]
In D, it's generally a bad idea to compare arrays with null, unless you're prepared to handle a lot of implementation-specific details. Instead, you should check .length, if it's 0, the string is empty, otherwise, it's not. If you need to distinguish between an empty string and null, you might want to consider using std.typecons.Nullable instead. It's slightly more verbose, but makes the intent of the code clearer and may lead to more maintainable code. T -- One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie. -- The Silicon Valley Tarot
