what does array.reverse really does?

[jicman]

Deewiant says...
>
>jicman wrote:
>> I am trying to get rid of the first item of an array, so I am trying to figure
>> it out what is the best way.  Right I I thought of this,
>> 
>> char[][] a;
>> a[0] = "a";
>> a[1] = "b";
>> a[2] = "c";
>> a[3] = "d";
>> 
>> so if I want to get rid of the first one, I do
>> 
>> a = a.reverse
>> a.length = a.length - 1;
>> a = a.reverse;
>> 
>> But now I am thinking that what if the array is huge.  So, what does
>> array.reverse really does?
>> 
>> thanks,
>> 
>> josé
>> 
>> 
>
>For one thing, it does it in-place, so you can just "a.reverse;" instead of "a =
>a.reverse;".
>
>For another, to get rid of the first array element, I suggest "a = a[1..$]",
>which I would expect to be faster.

Yeah...  This one would be much faster... :-)  I had forgotten about this.
Gosh, and I even used it a few months back... Read The Great Manual. :-)

Thanks.

>As to your question, I don't really know. Have a look at
>dmd\src\phobos\internal\adi.d, which has the code.