On Saturday, 14 September 2013 at 10:50:17 UTC, Jacob Carlborg
wrote:
On 2013-09-13 16:17, Orvid King wrote:
Well, I usually do it as:
int[string] someCache;
int getValue(string key)
{
if (auto val = key in someCache)
return *val;
return someCache[key] = -3;
}
That doesn't work with generic code. I mean, -3 can be a legal
value. There are many types that doesn't have an invalid value,
like pointers do.
I don't understand. What doesn't work? If the key exists, val !is
null, if it doesn't, val is null.
