Created
April 12, 2019 14:12
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Dictionary, mapKeys (counterpart to mapValues)
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| public extension Dictionary { | |
| func mapKeys<T>(_ transform: (Key) throws -> T) rethrows -> [T : Value] where T: Hashable { | |
| var dict: [T: Value] = [:] | |
| for (key, value) in self { | |
| let newKey = try transform(key) | |
| dict[newKey] = value | |
| } | |
| return dict | |
| } | |
| } |
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