arrays && functions && pointers

[Jarrett Billingsley]

"Jarrett Billingsley" <kb3ctd2 at yahoo.com> wrote in message 
news:e751ri$2709$1 at digitaldaemon.com...

>> btw. How do I reset all the data of a rectangular array?
>> something like:
>> tiles[][]=0;

Damn news client.  Ctrl + Enter posts, apparently.

I assume your array is of a static size (thus making it a rectangular 
array).  You can do this:

foreach(/* auto */ a; tiles)
    a[] = 0;

(I just put the /* auto */ in there to let me know when I'm using the dirty, 
nonobvious foreach index type inference)

Or, and this is a little hackish, but you can take advantage of the layout 
of rectangular arrays, which is a single block of memory:

((cast(TILE*)tiles.ptr)[0 .. TILEW * TILEH])[] = 0;

Basically, you're converting the rectangular array type into a linear array 
type, and setting all those elements to 0.  I would imagine this would be 
somewhat faster, since it's doing one block set, rather than one block for 
each row.