List of js

function List(arr) { ???this.listSize ?= arr.length; //列表元素个数 ???this.pos ??????= 0; ?????????//列表当前位置 ?????this.dataStore = arr; ???????//初始化一个空数组来保存列表元素}List.prototype = { ???constructor: List, ???append: function(element) { ???????this.dataStore[this.listSize++] = element; ???}, ???find: function (element) { ???????for (var i = 0; i < this.dataStore.length; ++i) { ???????????if (this.dataStore[i] == element) { ???????????????return i; ???????????} ???????} ???????return -1; ???}, ???remove: function (element) { ???????var foundAt = this.find(element); ???????if (foundAt > -1) { ???????????this.dataStore.splice(foundAt, 1); ???????????--this.listSize; ???????????return true; ???????} ???????return false; ???}, ???length: function() { ???????return this.listSize; ???}, ???toString: function() { ???????return this.dataStore; ???}, ???insert: function (element, after) { ???????var insertPos = this.find(after); ???????if (insertPos > -1) { ???????????this.dataStore.splice(insertPos + 1, 0, element); ???????????++this.listSize; ???????????return true; ???????} ???????return false; ???}, ???clear: function() { ???????delete this.dataStore; ???????this.dataStore = []; ???????this.listSize = this.pos = 0; ???}, ???contains: function (element) { ???????for (var i = 0; i < this.dataStore.length; ++i) { ???????????????????????if (this.dataStore[i] == element) { ???????????????return true; ???????????} ???????} ???????return false; ???}, ???front: function() { ???????this.pos = 0; ???}, ???end: function() { ???????this.pos = this.listSize-1; ???}, ???prev: function() { ???????if (this.pos > 0) { ???????????--this.pos; ???????} else { ???????????console.log(‘已到达首页‘); ???????} ???}, ???next: function() { ???????if (this.pos < this.listSize-1) { ???????????++this.pos; ???????} else { ???????????console.log(‘已到达末页‘); ???????} ???}, ???currPos: function() { ???????return this.pos; ???}, ???moveTo: function(position) { ???????this.pos = position; ???}, ???getElement: function() { ???????return this.dataStore[this.pos]; ???}, ???displayObjList: function(Objtype) { ???????for (var pos = 0; pos < this.length(); pos++) { ???????????if (this.dataStore[pos] instanceof Objtype) { ??????????????console.log(this.dataStore[pos]["name"] + ", " + ??????????????????this.dataStore[pos]["movie"]); ???????????} else { ?????????????continue; ???????????} ???????} ???}, ???showAllList: function() { ???????for (var pos = 0; pos < this.length(); pos++) { ??????????????console.log(this.dataStore[pos]); ???????} ???}, ???checkOut: function(name, movie, customerList) { ???????if (this.contains(movie)) { ???????????var c = new Customer(name, movie); ???????????customerList.append(c); ???????????this.remove(movie); ???????} else { ???????????console.log(movie + " is not available."); ???????} ???}}//文件数据var string = ‘(1)The Shawshank Redemption（ 《肖申克的救赎》 ）‘ ??????????+ ‘(2)The Godfather（ 《教父》 ）‘ ??????????+ ‘(3)The Godfather: Part II（ 《教父 2》 ）‘ ??????????+ ‘(4)Pulp Fiction（ 《低俗小说》 ）‘ ??????????+ ‘(5)The Good, the Bad and the Ugly（ 《黄金三镖客》 ）‘ ??????????+ ‘(6)12 Angry Men（ 《十二怒汉》 ）‘ ??????????+ ‘(7)Schindler’s List（ 《辛德勒名单》 ）‘ ??????????+ ‘(8)The Dark Knight（ 《黑暗骑士》 ）‘ ??????????+ ‘(9)The Lord of the Rings: The Return of the King（ 《指环王：王者归来》 ）‘ ????????????+ ‘(10)Fight Club（ 《搏击俱乐部》 ）‘ ??????????+ ‘(11)Star Wars: Episode V - The Empire Strikes Back（ 《星球大战 5：帝国反击战》 ）‘ ??????????+ ‘(12)One Flew Over the Cuckoo’s Nest（ 《飞越疯人院》 ）‘ ??????????+ ‘(13)The Lord of the Rings: The Fellowship of the Ring（ 《指环王：护戒使者》 ）‘ ??????????+ ‘(14)Inception（ 《盗梦空间》 ）‘ ??????????+ ‘(15)Goodfellas（ 《好家伙》 ）‘ ??????????+ ‘(16)Star Wars（ 《星球大战》 ）‘ ??????????+ ‘(17)Seven Samurai（ 《七武士》 ）‘ ??????????+ ‘(18)The Matrix（ 《黑客帝国》 ）‘ ??????????+ ‘(19)Forrest Gump（ 《阿甘正传》 ）‘ ??????????+ ‘(20)City of God（ 《上帝之城》 )‘;var movies = string.split(/\(\d+\)/g).splice(1);var moviesList = new List(movies); //保存电影var customers = new List([]); //保存租赁电影的顾客//顾客类function Customer(name, movie) { ???this.name = name; ???this.movie = movie;};console.log("Available movies is under follow: \n");moviesList.showAllList();var name = window.prompt(‘what is your name?‘);var movie = window.prompt(‘which movies do your like to see?‘);moviesList.checkOut(name, movie, customers);console.log("Now available movies is under follow: \n");moviesList.showAllList();