Swift - Struct and Array

Question

I'm trying to modify an existing struct which is then used with an array. Is there a solution to the following?

struct pickerData {
    var key = ""
    var value = ""
}

var pickerArray = [pickerData]()
pickerArray.append(pickerData(key: "1", value: "2")) //OK up to know but
//I need to append a new key:value to this structure

pickerArray.append(pickerData(key: "1", value: "2",value2: "3")) // error
pickerArray.append(pickerData(key: "1", value: "2"),value2: "3") // error

I basically need a mutable struct, is this doable?

It's not clear what you're after, you want to extend pickerData with more properties? This isn't possible – it could be that you want pickerData.value to be an Array or Dictionary — Airspeed Velocity
– Airspeed Velocity, Commented Apr 13, 2015 at 19:33
I'm trying to build an array with some key:value pairs where I don't yet know how many key:pair I will have nor will I know the key name. As an example I could start with an empty array and dynamically add new key:pairs in a for loop. The Arry would start with () then (key: "1"), then (key: "1", value: "2") then (key: "1", value: "2",value2: "3") and so on. — Csp Csp
– Csp Csp, Commented Apr 13, 2015 at 22:25

Scott Hunter · Accepted Answer · 2015-04-13 19:35:05Z

1

The structure of a struct cannot change; as your comment suggests that you want to add a key:value pair, you should be using a datatype that supports such pairs: a Dictionary. (Technically, those aren't key:value pairs in a struct.)

answered Apr 13, 2015 at 19:35

Scott Hunter

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