Checking for an element

You can check if there’s at least one occurrence of a specific element in an array by using contains(_:), which returns true if it finds the element in the array, and false if it doesn’t.

You can use this method to write a function that checks if a given player is in the game:

func isEliminated(player: String) -> Bool { return !players.contains(player)

}

Now you can use this function any time you need to check if a player has been eliminated:

print(isEliminated(player: "Bob"))

// > false

You could even test for the existence of an element in a specific range:

players[1...3].contains("Bob")

// > true

Now that you can get data out of your arrays, it’s time to look at mutable arrays and how to change their values.