typescript baice type 一

string:

function greeter(person: string) {
    return "Hello, " + person;
}

var user = "Jane User";

document.body.innerHTML = greeter(user);

Array:

function greeter(person: string) {
    return "Hello, " + person;
}

var user = [0, 1, 2];

document.body.innerHTML = greeter("C" + user[0]);

interface(感觉和结构体很像,注意它是变量名称放在前面，类型放在后面):

interface Person {
    firstname: string;
    lastname: string;
}

function greeter(person: Person) {
    return "Hello, " + person.firstname + " " + person.lastname;
}

var user = { firstname: "Jane", lastname: "User" };

document.body.innerHTML = greeter(user);

class, 里面的构造器和公共成员变量有些特别（跟C#的写法不一样），类没有作用域区分，会检查成员变量作用域，希望以后的版本能完善，接口还能parse这些class， 还不知道接口能不能定义方法。

class Student {
    fullname : string;
    constructor(public firstname, public middleinitial, public lastname) {
        this.fullname = firstname + " " + middleinitial + " " + lastname;
    }
}

interface Person {
    firstname: string;
    lastname: string;　　
}

function greeter(person : Person) {
    return "Hello, " + person.firstname + " " + person.lastname;
}

var user = new Student("Jane", "M.", "User");

document.body.innerHTML = greeter(user);

我们来看一下它生成的JavaScript代码， 实例化的Student调用了一个闭包函数并将成员变量转换成Student的node就变成了这样一个链条变量，没有作用域哦，其他的都在typescript里面帮我们写好，就像一个模板一样，可以写一些更抽象的东西（比如说链表，还没测试这个会生成什么样子）。Map这个文件可能是给调试用的：

var Student = (function () {
    function Student(firstname, middleinitial, lastname) {
        this.firstname = firstname;
        this.middleinitial = middleinitial;
        this.lastname = lastname;
        this.fullname = firstname + " " + middleinitial + " " + lastname;
    }
    return Student;
})();
function greeter(person) {
    return "Hello, " + person.firstname + " " + person.lastname;
}
var user = new Student("Jane", "M.", "User");
document.body.innerHTML = greeter(user);
//# sourceMappingURL=greeter.js.map

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