//创建空数组
var array = new Array();
//[]
//初始化数组
var array = new Array(1,2,3);
var array = Array.of(1,2,3);//ES6的方法
//[1,2,3]
//创建大小为5的数组
var array = new Array();//ES6的方法
//[undefined,undefined,undefined,undefined,undefined]
//给数组赋值
var array = new Array();
array[0] = 1 ;
array[1] = 2 ;
array[2] = 3 ;
//[1,2,3]

var number = [1,2,3];
number[number.length] = 4;
//[1,2,3,4]
//或者
var number = [1,2,3];
number.push(4);
//[1,2,3,4]

var number = [1,2,3];
number.unshift(0);
//[0,1,2,3]
number.unshift(-2,-1);
//[-2,-1,0,1,2,3]

//在索引1后面添加2，3，4
var number = [1,5,6];
number.splice(1,0,2,3,4);
//[1,2,3,4,5,6]

var number = [1,2,3];
number.shift();
//[2,3]

var numebr = [1,2,3,4,5,6];
//如果想删除元素3
number.splice(2,1);
//[1,2,4,5,6]
//如果想删除元素4，5
number.splice(3,2);

var number = [3,2,1];
number.reverse();
//[1,2,3]

var numebr = [2,3,4,1,3,7];
number.sort();
//[1,2,3,3,4,7]

var number = [4,5,6,7,1,2,3,8,9,10,11,12,13];
number.sort();
//[1, 10, 11, 12, 13, 2, 3, 4, 5, 6, 7, 8, 9]

var number = [4,5,6,7,1,2,3,8,9,10,11,12,13];
function compare(a,b){
 if(a < b){
 return -1;
 }
 if(a > b){
 return 1;
 }
 return 0;
}
number.sort(compare);
//[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]

var friends = [{name:'李晨',age:40},{name:'范冰冰',age:35}];
function comparePerson(a,b){
 if(a.age < b.age){
 return -1;
 }
 if(a.age > b.age){
 return 1;
 }
 return 0;
}
friends.sort(comparePerson);
//[{name:'范冰冰',age:35},{name:'李晨',age:40}]

var number = [1,3,4,3,56,6,7,4];
number.indexOf(3);//1
number.lastIndexOf(3)//3

function Stack(){
 var items = [];
 this.push = function(element){
 items.push(element);
 }
 this.pop = function(){
 return items.pop();
 }
 this.peek = function(){
 return items[items.length-1];
 }
 this.isEmpty = function(){
 return items.length === 0;
 }
 this.size = function(){
 return items.length;
 }
 this.clear = function(){
 items = [];
 }
 this.print = funciton(){
 console.log(items.toString());
 }
}

function Queue(){
 var items = [];
 this.enqueue = function(element){
 items.push(element);
 }
 this.dequeue = function(){
 return items.shift();
 }
 this.front = function(){
 return items[0];
 }
 this.isEmpty = function(){
 return items.length === 0;
 }
 this.clear = function(){
 items = [];
 }
 this.size = funciton(){
 return items.length;
 }
 this.print = function(){
 console.log(items.toString());
 }
}

function PriorityQueue(){
 var items = [];
 funciton QueueElement(element,priority){
 this.element = element;
 this.priority = priority;
 }
 function comparePriority(a,b){
 if(a.priority > b.priority){
  return 1;
 }
 if(a.priority < b.priority){
  return -1;
 }
 return 0;
 }
 this.enqueue = funciton(element,priority){
 var queueElement = new QueueElement(element,priority);
 items.push(queueElement);
 items.sort(comparePriority);
 }
 //其它方法和默认的Queue实现相同
}