Swift Array to Dictionary

MyPlayground.swift

//: Playground - noun: a place where people can play

struct Option {
    var id: UInt
    var name: String
}

func combine(options: [Option]) -> [UInt: String] {
    var combinedOptions = [UInt: String]()
    for option in options {
        combinedOptions[option.id] = option.name
    }
    return combinedOptions
}

let option1 = Option(id: 1, name: "One")
let option2 = Option(id: 2, name: "Two")
let option3 = Option(id: 3, name: "Three")
combine([option1, option2, option3]) // [2: "Two", 3: "Three", 1: "One"]

Is there a better way?

There's not a better built-in way, but I use this:

[option1, option2, option3].Dictionary{($0.id, $0.name)}

Support for that is here:
https://gist.github.com/Jessy-/cf7afb4819fe1a542712

It's modeled after https://msdn.microsoft.com/en-us/library/bb548657(v=vs.110).aspx but tuples make it slightly better.

you can do something like this:

let arr = [option1, option2, option3]
let reduced = arr.reduce([:]) { (var dict, e) -> [Int: String] in
    dict[e.id] = e.name
    return dict
}

I typed this in the phone with autocorrect on, may not compile out of the box!