Learning Swift™ Programming

Writing Your First Subscript

To create a subscript, you use the keyword subscript in your class, struct, or enum. A basic subscript looks like this:

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class Hand {    let fingers = ["thumb","index","middle","ring","pinky"]    subscript(i:Int) -> String{        return fingers[i]    }}let hand = Hand()println("I had to use my \(hand[2]) finger to on the way into work today.")

Here you are creating a class called Hand, which has five fingers. You can access each finger by index. After you create a new instance hand, you can access the thumb by using hand[0]. This directly accesses the fingers array. You can read and write to subscripts. You can mark them as read-only or read-write. Currently the hand/fingers access is ...