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object.defineProperty()

Posted on 2014-12-17
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Last Modified: 2014-12-22
Why do I get undefined for this line "console.log(newStudent.fullname);" below?  It's driving me crazy.

<!DOCTYPE html>
<html>
<head>
	<title>JavaScript Test Page</title>
	<script type="text/javascript" src="date.js"></script>
	<script>
		console.log("Object-Oriented JavaScript - Student constructor");
		//console.log("");

		function student(firstName,lastName,ssn,dormName)
		{
			this.fname = firstName;
			this.lname = lastName;
			this._ssn = ssn || 0;
			this.classes = [];
			this.dName = dormName || "A Hall";
		};

		Object.defineProperty(student.prototype, "fullname", {
			get: function() {
				return this.firstName + " " + this.lastName;
			}
		});
		
		var newStudent = new student("John","Doe","231-31-1313","jjjjj1111");
		console.log("HELLO WORLD");
		console.log(newStudent.fullname);
	</script>
</head>

<body>
</body>
</html>

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Thanks!
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Question by:Isaac
1 Comment
 
LVL 42

Accepted Solution

by:
Rob Jurd, EE MVE earned 500 total points
ID: 40506696
get: function() {
				return this.firstName + " " + this.lastName;
			}

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should be

get: function() {
				return this.fname+ " " + this.lname;
			}

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this article may help: http://www.experts-exchange.com/Programming/Languages/Scripting/JavaScript/A_13138-Javascript-is-just-an-Object.html

The scope of firstName and lastName are lost once the constructor has finished.
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