swift,

http://gashero.iteye.com/blog/2075324

// Playground - noun: a place where people can play

 

//haha 没有分好，编译器推断类型，好玩，空格严格限制

import UIKit

 

 

var str = "Hello, playground"

println(str)

 

 

let label = "the width is"

let width = 94

let widthLabel = label + String(width)

 

var shoppingList = ["catfish","water"]

shoppingList[0]

var occupation = ["a":"bb"]

occupation["a"]

println(occupation)

 

let scores = [12,34,50]

for a in scores {

    println(a)

    if a==12 {

        println("hello world")

    }

}

 

let interestingNumbers = [

"Prime":[2,3,4],

    "fibo":[1,5]

]

 

//字典可以这样遍历

for (kind,numbers) in interestingNumbers{

    println(kind)

}

 

//->这符合太迷惑人了

func greet(name:String,day:String)->String{

    return "hello world \(name),today is \(day)"

}

 

greet("bob", "tuesday")

 

func getPrices() ->(Double,Double,Double){

    return (2.3,1,1)

}

getPrices()

//...代表可变的参数，这里面也有元组，哈哈，闭包的概念，就是传递函数指针，

 

class Shape{

    var number = 0

    func myFunc()->String{

        return "a shape with \(number) sides"

    }

}

 

var shape = Shape()

shape.number = 10

shape.myFunc()

 

//当一个语言讲了 定义变量常量，函数定义，类定义，对象，调用，数组字典，就等于讲完了，

 

转载于:https://www.cnblogs.com/guligei/p/4429076.html