数组/对象

arr[0] = '张三'
arr[1] = 18
arr[2] = "男"
console.log(arr)    //["张三", 18, "男"]

arr["name"] = '张三'
arr["age"] = 18
arr["sex"] = "男"
console.log(arr)    //[name: "张三", age: 18, sex: "男"]

person = new Object();
person.firstname = "John";
person.lastname = "Doe";
person.age = 50;
person.eyecolor = "blue";
console.log(person) //{firstname: "John", 
lastname: "Doe", age: 50, eyecolor: "blue"}

person={firstname:"John",lastname:"Doe",age:50,eyecolor:"blue"}
console.log(person) //{firstname: "John", lastname: "Doe", age: 50, eyecolor: "blue"}

//使用对象构造器
function person(firstname,lastname,age,eyecolor){
 this.firstname=firstname;
 this.lastname=lastname;
 this.age=age;
 this.eyecolor=eyecolor;
}
myFather=new person("John","Doe",50,"blue");
myMother=new person("Tim","li",48,"white");
console.log(myFather)  //person {firstname: "John", lastname: "Doe", age: 50, eyecolor: "blue"}
console.log(myMother)  //person {firstname: "Tim", lastname: "li", age: 48, eyecolor: "white"}