> On May 18, 2016, at 11:03 AM, Artyom Goncharov via swift-users > <swift-users@swift.org> wrote: > > Yes, of course I can use API method but this kind of behaviour for subscript > operator seems inconsistent(or even magical) to me because it is possible to > initialise a dictionary with nil without casting it. Though nil is a special > case it is still a value in the set of all values of a T? type, am I wrong?
There are a few ways to assign nil to a dictionary entry. First of all dictionary[“key”] = nil always removes “key" from dictionary. To assign a nil value use one of: dictionary[“key”] = Optional(nil) dictionary[“key”] = .Some(nil) dictionary[“key”]? = nil That last only works if “key” already exists in the dictionary, i.e. you are replacing the existing value. The first two will add a dictionary entry if necessary. I suspect now that you’ve been bitten by this you will remember it forever :) Marc _______________________________________________ swift-users mailing list swift-users@swift.org https://lists.swift.org/mailman/listinfo/swift-users
