How do I add a tuple to a Swift Array?

Question

I\'m trying to add a tuple (e.g., 2-item tuple) to an array.

var myStringArray: (String,Int)[]? = nil
myStringArray += (\"One\", 1)

What I\'m g

Answer 1

If you remove the optional, it works fine, otherwise you'll have to do this:

var myStringArray: (String,Int)[]? = nil

if !myStringArray {
    myStringArray = []
}

var array = myStringArray!
array += ("One", 1)
myStringArray = array

You can never append an empty array, so you'll have to initialize it at some point. You'll see in the overload operator below that we sort of lazy load it to make sure that it is never nil.

You could condense this into a '+=' operator:

@assignment func += (inout left: Array<(String, Int)>?, right: (String, Int)) {

    if !left {
        left = []
    }

    var array = left!
    array.append(right.0, right.1)
    left = array

}

Then call:

var myStringArray: (String,Int)[]? = nil
myStringArray += ("one", 1)