On Wed, 09 Feb 2011 07:58:12 -0500, Dominic Jones
<[email protected]> wrote:
Hello,
I want to allocate the "int[]" array for a particular key in
int[][string] list;
by doing
list[key].length = list[key].length + 1;
but it does not work. I get an array bounds error. I am using gdc 4.3.5.
Any
suggestions?
Try using the in operator:
if(auto arr = key in list) // arr is now type int[]*
{
(*arr).length = (*arr).length + 1;
}
else
list[key] = new int[1]; // or larger if desired
It incurs a double lookup when the key doesn't exist yet, but I'm not sure
you can do any better (unless you know ahead of time the key is not in the
AA). The issue is you are looking up list[key] without it existing, that
throws the array bounds. The in check in my code checks to see if it is
present first before doing anything. If they key is present, then there's
only a single lookup.
-Steve
