Swift 1.2 beta required code changes and bugs

swift_1_2_source_changes.swift

// Will be fixed
let sub:SubClass = s as? SubClass ?? SubClass(2)
// Use this for Beta 1
let sub:SubClass = (s as? SubClass) ?? SubClass(2)

// Setup
let dict:[String:Int]? = ["a":1, "b":2]
// Swift 1.1 - Removed
let x:Int? = dict.map { $0["a"] }?
// Swift 1.2
let x:Int? = dict.map { $0["a"] } ?? nil

"fooübar".uppercaseString // Crashes - Fixed in next beta

let s:String = NSString() // requires "as String" cast in Swift 1.2