create dynamic size array swift

Question

I want to create an Array, if i make it like this it works:

var arrayEingabe = Array(count:30, repeatedValue:0)

If i make it like this it does not work:

var sizeArray = 30
var arrayEingabe = Array(count:sizeArray, repeatedValue:0)

At the end i want to change the size of my Array depending on what the user typed in.

I was searching the web for one hour now, but i could not find the answer.

Thanks for your help guys

Greets

Kove

There's nothing wrong with the code you provided. Could you add more details explaining exactly what the problem is? — Mick MacCallum
– Mick MacCallum, Commented Dec 17, 2014 at 9:12
@kove: By default the size of the array is dynamic in Swift. If you want to use a fixed size array then the above properties (count, repeatedValue) can be set. The creation of dynamic sized array is simple, var arrayEingabe : [Int] — Suresh Kumar Durairaj
– Suresh Kumar Durairaj, Commented Dec 17, 2014 at 9:20
@Suresh I disagree with the fixed/dynamic array description. Array created with Array(count, repeatedValue) is still dynamic and can grow/shrink, it just has creates array with specific length and initial values (unless you mark it with let, of course). — Kirsteins
– Kirsteins, Commented Dec 17, 2014 at 9:27
Forgot to say that "If you declare with 'let'" :P , Apparently array variable is dynamic by default in Swift unless we specify it to be fixed. Agree? — Suresh Kumar Durairaj
– Suresh Kumar Durairaj, Commented Dec 17, 2014 at 9:30
It's exceptionally helpful on Stack Overflow if you never use words like "does not work". Instead, describe what you were expecting the code to do, and describe what it does that's different, including the exact text of any error messages. — Matt Gibson
– Matt Gibson, Commented Dec 17, 2014 at 11:15

jwlaughton · Accepted Answer · 2014-12-17 11:28:15Z

12

Actually both your examples compiled OK for me, but you should be more specific about types. Something like:

var arrayCount:Int = 30
var arrayEingabe = Array(count:arrayCount, repeatedValue:Int())

actually this might be better for you:

var arrayEingabe = [Int]()

This creates an empty array, and as mentioned in the comments Swift arrays are mutable. You can add, replace and delete members as you want.

answered Dec 17, 2014 at 11:28

jwlaughton

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Comments

Vinod Supnekar · Accepted Answer · 2017-04-04 09:39:22Z

0

On Swift 3.0.2 :- Use Array initializer method give below:-

override init(){
let array = Array(repeating:-1, count:6)
}

Here, repeating :- a default value for Array. count :- array count.

answered Apr 4, 2017 at 9:39

Vinod Supnekar

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