One-liner functions for adding an value to a dictionary if it's non-nil

OptionalAdd.swift

extension Dictionary {
    
    func addingIfNonNil(key: Key, value: Value?) -> Self {
        guard let value else {
            return self
        }
        var copy = self
        copy[key] = value
        return copy
    }
    
    func addingIfNonNil(_ values: [Value?], keyGenerator: (Value) -> Key) -> Self {
        guard !values.isEmpty else {
            return self
        }
        var copy = self
        values.forEach { value in
            if let value {
                copy[keyGenerator(value)] = value
            }
        }
        return copy
    }

}