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/**
* PersonÀࣺ¶¨ÒåÒ»¸öÈË£¬ÓиöÊôÐÔname£¬ºÍÒ»¸ögetName·½·¨
* @param {String} name
*/
function Person(name) {
this.name = name;
}
Person.prototype.getName = function() {
return this.name;
}

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public class Person {
//ÊôÐÔ£¨×ֶΣ©
String name;
//¹¹Ôì·½·¨£¨º¯Êý£©
Person(String name) {
this.name = name;
}
//·½·¨
String getName() {
return this.name;
}
}

ΪÁËÈÃjs´úÂë·ç¸ñ¸ü½ô´Õ£¬°Ñ¹ÒÔÚprototypeµÄ·½·¨´úÂëÒÆµ½function PersonµÄ´óÀ¨ºÅÄÚ¡£
function Person(name) {
this.name = name;
Person.prototype.getName = function() {
return this.name;
}
}

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var p1 = new Person("Jack");
var p2 = new Person("Tom");
console.log(p1.getName());//Jack
console.log(p2.getName());//Tom

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àÅ£¬ËƺõºÜÍêÃÀ¡£
a ¡¢¿ÉÒÔͨ¹ý´«²Î¹¹Ôì¶ÔÏóʵÀý
b ¡¢¶ÔÏóʵÀý¶¼¹²Ïíͬһ·Ý·½·¨²»Ôì³ÉÄÚ´æÀË·Ñ
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µ«Ã¿´ÎnewÒ»¸ö¶ÔÏóµÄʱºò¶¼»áÖ´ÐР 
Person.prototype.getName = function() {
        return this.name;
}
Ôì³ÉÁ˲»±ØÒªµÄÖØ¸´µÄÔËËã¡£ÒòΪgetName·½·¨¹ÒÔÚprototypeÉÏÖ»ÐèÖ´ÐÐÒ»´Î¼´¿É¡£Ö»ÐèÉÔ΢¸ÄÔìÏ£º
function Person(name) {
this.name = name;
if(Person._init==undefined) {
alert("ÎÒÖ»Ö´ÐÐÒ»´Î£¡");
Person.prototype.getName = function() {
return this.name;
}
Person._init = 1;
}
}

newÁ½¸ö¶ÔÏó£¬
var p1 = new Person("Andy");//µÚÒ»´Înew»áµ¯³ö'ÎÒÖ»Ö´ÐÐÒ»´Î£¡'
var p2 = new Person("Lily");//ÒÔºónewµÄ¶ÔÏó²»»áÔÙÖ´ÐÐÁË


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var ob = function(){
var obj = this;
function fn1(){
alert( obj === window );//false
alert( this === window );//ture
}
this.fn2 = function() {
fn1();
}

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