Constants may be set only once, but Swift 1.2 allows us to create constants without initializing them immediately. For example:
let username: String
if authenticated {
username = fetchUsername()
} else {
username = "Anonymous"
}
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Other changes in Swift 1.2…
- The zip() function joins two sequences
- The flatMap() method transforms optionals and arrays
- Closures can now be marked @noescape
- Classes can now have static methods and properties
- A new Set data structure
- Implicit bridging has been reduced
- Multiple if let bindings
- Typecasting now includes as!
Download all Swift 1.2 changes as a playground Link to Swift 1.2 changes
