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To create an empty dictionary, should I call [NSMutableDictionary dictionary] or [[NSMutableDictionary alloc] init]?
What's the difference?
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The NSMutableDictionary class declares the programmatic interface to objects that manage mutable associations of keys and values. It adds modification operations to the basic operations it inherits from NSDictionary . NSMutableDictionary is “toll-free bridged” with its Core Foundation counterpart, CFMutableDictionary .
In Swift, the NSDictionary class conforms to the DictionaryLiteralConvertible protocol, which allows it to be initialized with dictionary literals. For more information about object literals in Swift, see Literal Expression in The Swift Programming Language (Swift 4.1).
[NSMutableDictionary dictionary] is the same as [[[NSMutableDictionary alloc] init] autorelease]
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