Something about Swift 1

The national day’s holidays are over,WTF!

Anyway I enjoyed some sweet moment with my family.

I will never, you know, never  gonna try a new thing after it appeared, published or launched immediately, I always been watching at that for a period of time, especially for a new programming language. So I’ve been watching on Swift for a while too.

It seems like a mixture of scripts than a new language,  I can find lots of syntaxes those I saw  from other languages, like javascript, actionscript, or we can say, ECMAScript, Ruby, of course Objective-C.

Even thought it is so friendly to me, it still contains some new features, some of them are really smart, some are odd, I will record them all tentatively.

• Assigning array items type by syntax:

  var array:[String] = ["A","B"]

• Add new items to array by operator “+=”, Cool!

  var arrayNumber:[Int] = [1,2,3,4]
  arrayNumber += [9,10] // println [1,2,3,4,9,10]

• If you don’t assign collection type to a variable, you CAN NOT invoke it’s functions,eg:

  var arr = []
  arr.append("A") 
  // will case an error,because Swift is not sure it is a Dictionary or an Array
  var arr:Array = []
  arr.append("A") 
  //Now it works.

• The most compact way to declare a integer range from 1 to 100

  let arrayInt = 1...100

for i in arrayInt {
println(i)
}
BTW, I love the way Swift did on for loop with range.

• Power features of switch, use range in  case

  var languagesICan:[String] = ["ActionScript","Objective-C","Swift","C","Java","Lua","JavaScript"]
  for var i = 0; i < languagesICan.count ;i++ {
  switch i{
      case 0...1:
          println("I am good at \(languagesICan[i])")
      case 2:
          println("I love \(languagesICan[i])")
      default:
          println("I can program with \(languagesICan[i])")
  }
  }