Mapping with partial

[matovitch via Digitalmars-d-learn]

On Monday, 30 March 2015 at 19:08:24 UTC, anonymous wrote:
> On Monday, 30 March 2015 at 18:37:53 UTC, matovitch wrote:
>> On Monday, 30 March 2015 at 18:34:19 UTC, Adam D. Ruppe wrote:
> [...]
>>> Aye, that would work too, but the slice I think is more 
>>> efficient as I'm pretty sure... not completely sure, but I 
>>> think .array makes a copy of static arrays, whereas the slice 
>>> doesn't.
>>
>> I was going to ask you the question does it just add the range 
>> shell or does it make a copy ? :/ Maybe someone else know.
>
> Let's check the documentation. 
> http://dlang.org/phobos/std_array.html#array says: "Allocates 
> an array and initializes it with copies of the elements of 
> range r." Documentation says copy.
>
> Let's check the actual behaviour.
> ----
> void main()
> {
> 	int[1] a = [1];
> 	import std.array: array;
> 	a.array[0] = 2;
> 	import std.stdio: writeln;
> 	writeln(a[0]);
> }
> ----
> (also at <http://dpaste.dzfl.pl/1191144a9acf>)
> This program prints "1". That's the output we'd expect when 
> `array` makes a copy. Actual behaviour says copy.
>
> So, copy.

That settle the point for array as for [] ? I guess the 
documentation should have something to say about it too. ;)