Check if key exists in dictionary of type [Type:Type?]

Question

How can I check if a key exists in a dictionary? My dictionary is of type [Type:Type?].

I can\'t simply check dictionary[key] == nil, as th

Answer 1

I believe the Dictionary type's indexForKey(key: Key) is what you're looking for. It returns the index for a given key, but more importantly for your proposes, it returns nil if it can't find the specified key in the dictionary.

if dictionary.indexForKey("someKey") != nil {
    // the key exists in the dictionary
}

Swift 3 syntax....

if dictionary.index(forKey: "someKey") == nil {
    print("the key 'someKey' is NOT in the dictionary")
}