Building a string from n chars

[monarch_dodra via Digitalmars-d-learn]

On Thursday, 4 September 2014 at 20:38:39 UTC, Nordlöw wrote:
> On Thursday, 4 September 2014 at 19:24:00 UTC, Nordlöw wrote:
>>    string t1; t1 ~= '*'.repeat(n).array;
>>    string t2; t2 ~= "*".replicate(n);
>
> After having read 
> http://dlang.org/phobos/std_array.html#.replicate
>
> I came to the conclusion that the lazy std.range:repeat is 
> preferred.

If lazy is good enough for you yes. AFAIK, replicate is *very* 
close in terms of implementation to what a.repeat(n).array() 
would do anyways. Heck, I'd be surprised if it did it 
differently, since (again, AFAIK) repeat.array() is "optimal" 
anyways.

> I'm still a bit confused about the fact that -vgc gives no 
> warnings about GC-allocations, though.

Strange indeed. Both solutions allocate a slice, and then append 
that slice. The "s[]='*'" Solution I gave you will not create a 
temporary allocation.