Does anybody know an efficient way to get/create-if-missing an lvalue AA entry.
I commonly resort to this, but it uses three lookups.

auto p = key in aa;
if (p is null)
{
    aa[key] = inital;
    p = key in aa;
}
//...

On Tue, 27 Mar 2012 11:35:51 +0200, Martin Nowak <dawg@dawgfoto.de> wrote:

> Does anybody know an efficient way to get/create-if-missing an lvalue AA entry.
> I commonly resort to this, but it uses three lookups.
>
> auto p = key in aa;
> if (p is null)
> {
>      aa[key] = inital;
>      p = key in aa;
> }
> //...

Depends on your needs, but I find aa.get(key, defaultValue) nice. It doesn't set the value though:
auto p = aa.get(key, initial);