How to get a default value on nil

Question

I want to check if there is a value on a certain variable. If there isn't I want to return a default value. How is the best pratice of doing this?

I would like to do something like:

let defaults = Userdefaults()
if let name = defaults.string(foKey "name") { 
    return name 
} else {
    return "john"
}

There's also `UserDefaults.standard.register(defaults:)`. Possible duplicate of https://stackoverflow.com/q/37830558/2227743. — Eric Aya, Dec 11 '17 at 11:57

score 4 · Accepted Answer · edited Dec 11 '17 at 11:57

4

You should be able to do this..

let defaults = UserDefaults.standard
let name = defaults.string(foKey "name") ?? "john"

edited Dec 11 '17 at 11:57

Paulo Mattos

answered Dec 11 '17 at 11:48

Scriptable

2

You should probably be using the shared `UserDefaults.standard` instance instead. – Paulo Mattos Dec 11 '17 at 11:56
Thanks, I didn't even notice that – Scriptable Dec 11 '17 at 11:57

score 3 · Answer 2 · answered Dec 11 '17 at 11:49

3

return UserDefaults.standard.string(forKey: "name") ?? "john"

answered Dec 11 '17 at 11:49

Adnan Aftab

2 Answers2