How to create an array in an array, then check if it contains a string. (SWIFT)

Question

What's the correct way of creating an array of strings, and have lots of them in a array? So far I tried this

 var arrayInArray = [[String]]()

Then I appended string arrays into "arrayInArray". And tried checking if it contained a specific string by doing

if arrayInArray[indexPath.row].containsObject(PFUser.currentUser().username)

and the error is [(String)] does not have a member named 'containsObject'. Whats the correct way of doing this?

Can you show where you "appended string arrays into 'arrayInArray'" — 67cherries
– 67cherries, Commented Dec 17, 2014 at 3:57

matt · Accepted Answer · 2014-12-17 04:08:00Z

1

Use find:

var arrayInArray = [[String]]()
arrayInArray += [["Hey", "Ho"]]
arrayInArray += [["Yo", "Yeah"]]
let ix = find(arrayInArray[0], "Ho") // Optional(1), the right answer

Or contains:

let ok = contains(arrayInArray[0], "Ho") // true, the right answer

answered Dec 17, 2014 at 4:08

matt

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4 Comments

rdelmar Over a year ago

Matt, where is "contains" documented? I didn't see that in the "The Swift Programming Language" or the "Swift Standard Library Reference". Did I just miss it?

matt Over a year ago

@rdelmar There is a lot more great stuff in the Swift header than Apple has bothered to write up (so far). That's the real place to learn what you can say - and to understand how Swift built-in object types really work. To get there, say import Swift and command-click on Swift. "now the ears of my ears awake and now the eyes of my eyes are opened"

rdelmar Over a year ago

Thanks for that tip; that's great. Hopefully, Apple will get around to updating their docs soon.

matt Over a year ago

@rdelmar Forgot to mention there is also some good stuff in the CoreGraphics header.

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