gistfile1.txt

import UIKit


func +<A,B>(lhs: [A:B], rhs: [A:B]) -> [A:B] {
    var dict : [A:B] = [:]
    for (key, value) in lhs {
        dict[key] = value
    }
    for (key, value) in rhs {
        dict[key] = value
    }
    return dict
}


let pets = ["henry": "dog", "bella": "hamster"]
let kids = ["Manny": "boy", "Addy": "Girl"]

let all = [pets, kids]

all.reduce([:], combine: +)

If you hate operator overloading, and there is very good reason to hate it, you can just replace + with a simple function name: addDictionaries.