How do I compare two dictionaries in Swift?

Question

Is there an easy way to compare two [String: AnyObject] dictionaries in swift, since it doesn\'t accept the == operator?

By comparing two

Answer 1

Swift 4 Update:

Comparing Dictionaries is now native! (Docs here)

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Swift 3:

Leo Dabus already has an excellently written post with the accepted solution. However, for me, I found that it needed one more step to be fully usable. As you can see from his code, you need to set your dictionary type to [AnyHashable: Any], or otherwise you'll get Binary operator '==' cannot be applied to two '[String : Any]' operands, to use a dictionary common in deserializing JSON for my example.

Generics to the rescue!:

// Swift 3.0
func == (left: [K:V], right: [K:V]) -> Bool {
    return NSDictionary(dictionary: left).isEqual(to: right)
}

or in another case I had, with [String: Any?]:

func == (left: [K:V?], right: [K:V?]) -> Bool {
    guard let left = left as? [K: V], let right = right as? [K: V] else { return false }
    return NSDictionary(dictionary: left).isEqual(to: right)
}