On Wed, Mar 21, 2012 at 07:56:47PM +0100, Andrej Mitrovic wrote:
> On 3/21/12, H. S. Teoh <hst...@quickfur.ath.cx> wrote:
> > int[string][int] map;
> > map["abc"] = int[int].init;
> > map["abc"][30] = 123;
>
> I think you meant:
>
> int[int][string] map;
> map["abc"] = (int[int]).init;
> map["abc"][30] = 123;
Yes, I did. :-)
> You can however init with null if the value is a hash:
>
> int[int][string] map;
> map["abc"] = null;
> map["abc"][30] = 123;
>
> But otherwise I agree it would be nice if there was a shortcut for this.
Without this "shortcut", it's a complete pain to deal with deeply-nested
AA's:
int[int][int][string] map;
void inc_frequency(string entry, int x, int y) {
if (entry in map) {
if (x in map[entry]) {
if (y in map[entry][x]) {
map[entry][x][y]++;
} else {
map[entry][x][y] = 1;
}
} else {
map[entry][x] = null;
map[entry][x][y] = 1;
}
} else {
map[entry] = null;
map[entry][x] = null;
map[entry][x][y] = 1;
}
}
whereas if this was supported, the code would simply be:
void inc_frequency(string entry, int xcoor, int ycoor) {
map[entry][x][y]++;
}
(And the above example is only 3 levels deep... it gets exponentially
worse with every level of nesting.)
T
--
Mediocrity has been pushed to extremes.
