On Tuesday, 12 March 2013 at 14:09:55 UTC, Steven Schveighoffer
wrote:
Yes. That use of the "is" operator is mainly to allow updating
the value
you meant "in", not "is", right?
Yes. Sorry, the keys are right next to each other :)
without looking up the key twice. This behavior could be
implemented using a proxy object, but this is not what I was
talking about. I meant the specific case of "if (key in
environment)".
I think Valdimir wants to have opIn_r return bool?
Returning the string (doing the same as ".get(key, null)") should
have the same effect in an if statement.
