Swift 语法笔记01

Swift 好多新奇的地方啊。。。妈的

var display: int {

　　get()

　　set()

}

Tuple:

let x: (d:Double, e:String, f:Int) = (3.1415, "Hello", 1)

x.d x.e x.f

let (a,b,c) = x

print(a,b,c)

Range:

let array=["a","b","c","d","e"]

let subArray1 = array[2...4] // c d e

let subArray2 = array[2..<4] // c d

比python的字符串[::]还是要差一点

for lop in 1...100 //打印从1到100

swift里的class是传引用的(和java一样)，函数等可以更改传入类的成员的值

class foo {
    var value:Int = 100
}

func add (f: foo) {
    f.value += 1
}

let test = foo()
add(test)
test.value

Array:

var a = Array<String>()

or

var a = [String]()

filter map reduce

Dictionary

var dic = Dictionary<String, Int>()

var dic = [String: Int]()