Check if an array already contains a string value in Swift

Question

I have an Array that is declared as:

var stringsArray: Array<String!> = []

I want to add items to it using code along these lines:

stringsArray.append("String 1")

However, I would like to use an if statement to detect whether or not what is about to be appended already exists in stringsArray and if it does, I would like the code to append not to be ran.

I am using Swift.

@Alladinian: I would turn your comment into an answer - that **is the solution** — Antonio, Jul 02 '15 at 09:46
A `Set` does not have defined ordering but I do need to be manipulate the order of the contents. Am I able to do this using a `Set`? — Daniel Bramhall, Jul 02 '15 at 09:48
@DanielBramhall Then I guess you could use an `NSMutableOrderedSet` — Alladinian, Jul 02 '15 at 09:55

score 3 · Accepted Answer · edited May 23 '17 at 12:16

3

You can simply use this:

var elements = [1,2,3,4,5]
if contains(elements, 5) {
    print("Array contains 3")
}

For Swift 2.2 and later, there is a member contains():

var elements = [1, 2, 3, 4, 5]
if elements.contains(3) {
    print("Array contains 3")
}

Resource: How to check if an element is in an array.

edited May 23 '17 at 12:16

Community

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answered Jul 02 '15 at 09:45

Altay Mazlum

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If you copy code verbatim from another answer then you should add a link to the source: http://stackoverflow.com/a/25391725/1187415. – Martin R Jul 02 '15 at 09:48
This doesn't work as it says that Swift cannot find an overload for `contains` that accepts an argument list of type `(Array, String)` – Daniel Bramhall Jul 02 '15 at 13:19
True that, forgot about that, editing in a minute. – Altay Mazlum Jul 02 '15 at 13:20
Any ideas regarding my issue? Thanks! – Daniel Bramhall Jul 02 '15 at 13:37
Check the link above, that should solve your problem. – Altay Mazlum Jul 02 '15 at 13:39

Check if an array already contains a string value in Swift

1 Answers1