Check if an array already contains a string value in Swift [duplicate]

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
– Antonio, Commented Jul 2, 2015 at 9:46
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
– Daniel Bramhall, Commented Jul 2, 2015 at 9:48
@DanielBramhall Then I guess you could use an NSMutableOrderedSet — Alladinian
– Alladinian, Commented Jul 2, 2015 at 9:55

Community · Accepted Answer · 2017-05-23 12:16:14Z

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, 2017 at 12:16

CommunityBot

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answered Jul 2, 2015 at 9:45

Altay Mazlum

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5 Comments

Martin R Over a year ago

If you copy code verbatim from another answer then you should add a link to the source: stackoverflow.com/a/25391725/1187415.

Daniel Bramhall Over a year ago

This doesn't work as it says that Swift cannot find an overload for contains that accepts an argument list of type (Array<String!>, String)

Altay Mazlum Over a year ago

True that, forgot about that, editing in a minute.

Daniel Bramhall Over a year ago

Any ideas regarding my issue? Thanks!

Altay Mazlum Over a year ago

Check the link above, that should solve your problem.

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