{"id":2209,"date":"2017-05-03T13:18:31","date_gmt":"2017-05-03T05:18:31","guid":{"rendered":"http:\/\/www.qdabc.cn\/?p=2209"},"modified":"2017-05-03T13:18:31","modified_gmt":"2017-05-03T05:18:31","slug":"new%e7%9a%84%e8%bf%87%e7%a8%8b%ef%bc%8c%e4%bb%a5%e5%8f%8a__proto__%e4%b8%8eprototype%e7%9a%84%e5%85%b3%e7%b3%bb","status":"publish","type":"post","link":"http:\/\/www.qdabc.cn\/?p=2209","title":{"rendered":"new\u7684\u8fc7\u7a0b\uff0c\u4ee5\u53ca__proto__\u4e0eprototype\u7684\u5173\u7cfb"},"content":{"rendered":"

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function Person(name) {\r\n    this.name = name;\r\n}\r\nPerson.prototype.getName = function() {\r\n    return this.name;\r\n}\r\nvar a = new Person(\"liwen\");\r\nconsole.log(a.name); \/\/liwen<\/pre>\n
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function Person(name) {\r\n   this.name = name;\r\n}\r\nPerson.prototype.getName = function() {\r\n   return this.name;\r\n}\r\nvar objectFactory = function() {\r\n   \/\/\u4eceObject.prototype\u4e0a\u514b\u9686\u4e00\u4e2a\u7a7a\u7684\u5bf9\u8c61,\u56e0\u4e3aJavaScript\u4e2d\u6240\u6709\u5bf9\u8c61\u7684\u6839\u5bf9\u8c61\u662fObject.prototype\u3002\r\n   var obj = new Object();\r\n   \/\/\u53d6\u5f97\u5916\u90e8\u4f20\u5165\u7684\u6784\u9020\u5668\uff0c\u6b64\u4f8b\u5b50\u662fperson\r\n   var Constructor = [].shift.call(arguments);        \r\n   obj.__proto__ = Constructor.prototype;\/\/\u6307\u5411\u6b63\u786e\u7684\u539f\u578b\uff08\u5373Person.prototype\uff09\uff0c\u9ed8\u8ba4\u662fObject.prototype\r\n   \/\/\u501f\u7528\u5916\u90e8\u4f20\u5165\u7684\u6784\u9020\u5668\u7ed9OBJ\u8bbe\u7f6e\u5c5e\u6027\r\n   var ret = Constructor.apply(obj, arguments);\r\n   \/\/\u786e\u4fdd\u6784\u9020\u5668\u603b\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5bf9\u8c61\r\n   return typeof ret === 'object' ? ret : obj;\r\n}\r\nvar a = objectFactory(Person, \"liwen\");  \/\/\u7b49\u4e8e var a = new Person(\"liwen\")\r\nconsole.log(a.name)\/\/liwen<\/pre>\n
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