Why can't I check to see if my array of arrays contains a specific array?

Question

I\'m trying to check to see if an array of arrays contains an array of Strings. My error message says:

\"Cannot find an overload for \'contains\' that accepts an arg

Answer 1

Update for Swift2:

contains() is now a function defined in a protocol extension of Sequence therefore:

var allCards = [[String]]()
var exp1 = [String]()

if !allCards.contains( { $0 == exp1 } ) {
    allCards.append(exp1)
}