Runtime error with array and struct with swift - arrays

Question

I am new to Swift and I am stuck on an error that must be stupid!!! Here is the code
import Foundation
struct Serie {
var nomeEsercizio = ""
var ripetizioni=0
var chili=0.0
var recupero=0
}
struct Superserie {
var elementi: [Serie] = []
}
struct Scheda {
var elementi: [Superserie] = []
}
class Schede {
var elementi: [Scheda] = []
func isEmpty() -> Bool {
return elementi.isEmpty
}
}
class GestoreDiSchede {
static var schedeLocali = Schede()
static var username = "empty"
class func initializeUserDefaults () {
var superserieTemp = Superserie()
var scheda = Scheda()
let schede = Schede()
superserieTemp.elementi.append(Serie(nomeEsercizio: "Spinte manubri", ripetizioni: 10, chili: 10, recupero: 0)) //....more code
I cannot post the screenshot of the debugger but here the values of the items of the variable "elementi" inside the struct "superserieTemp" are assigned RANDOMLY!!!!! why?
I have tried everything but I am not able to get the code working, please help :(
EDIT <-----------
After some hours I found out that the error occurs because I am not able to properly initialise a struct of array of struct. How can I do it?
If I do the following way, then when I try to append an item in the array inside the bigger struct, I get this error "variable 'a' passed by reference before begin initialised". The 'a' variable refers to the code below.
struct Inside {
var something: String
var somethingElse: Int
}
struct Outside {
var array: [Inside]
init(){
self.array = []
}
}
//then the error is given in the following lines (which are placed inside a method of another class)
var a: Outside
a.array.append.(Inside("aaaa",1111))
Where is the issue?
EDIT EDIT <-----------
this it the right (not compiling) code, I had written the previous one directly in stack overflow
struct Inside {
var something: String
var somethingElse: Int
}
struct Outside {
var array: [Inside]
init(){
self.array = []
}
}
//then the error is given in the following lines (which are placed inside a method of another class)
var a: Outside
a.array.append(Inside(something: "aaaa",somethingElse: 1111))

Answer 1

In your example code you aren't initializing the variable a but in Swift every value has to be initialized before useable. When changing the last two lines to this:
var a = Outside()
a.array.append(Inside(something: "aaaa", somethingElse: 1111))
it works for me just fine (Swift 2.0)
Or you can remove the custom initializer which prevented the default initializer from being generated, then it looks like this:
struct Inside {
var something: String
var somethingElse: Int
}
struct Outside {
var array: [Inside]
}
let a = Outside(array: [Inside(something: "aaaa", somethingElse: 1111)])

Answer 2

A few errors with your code: (1) a is not initialized. You just declared it being of type Outside. (2) You have an extra dot after append. (3) You need parameter labels with the default initializer for Inside.
struct Inside {
var something: String
var somethingElse: Int
}
struct Outside {
var array = [Inside]() // Don't need to initialize array in your init call
}
var a = Outside()
a.array.append(Inside(something: "aaaa",somethingElse: 1111))