How to combine two Dictionary instances in Swift?

Question

How do I append one Dictionary to another Dictionary using Swift?

I am using the AlamoFire library to send a

Answer 1

func += (lhs: inout [Key: Value], rhs: [Key: Value]) {
    rhs.forEach{ lhs[$0] = $1 }
}

var dic1 = ["test1": 1]

dic1 += ["test2": 2]

dic1  // ["test2": 2, "test1": 1]