this key word

section2/script.js

@@ -18,7 +18,7 @@ var x=23
 /////////////////////////////////////
 // Lecture: Scoping
 
-
+/*
 // First scoping example
 var a = 'Hello!';
 first();
@@ -46,5 +46,36 @@ function third() {
     //console.log(c);
     console.log(a+d);
 }
+*/
+
+/////////////////////////////////////
+// Lecture: The this keyword
+
+//console.log(this);
+calculateAge(1985);
+function calculateAge(year) {
+    console.log(2016 - year);
+    console.log(this);
+}
+var john = {
+    name: 'John',
+    yearOfBirth: 1990,
+    calculateAge: function() {
+        console.log(this);
+        console.log(2016 - this.yearOfBirth);
+        
+        function innerFunction() {
+            console.log(this);
+        }
+        innerFunction();
+    }
+}
+john.calculateAge();
+var mike = {
+    name: 'Mike',
+    yearOfBirth: 1984
+};
+mike.calculateAge = john.calculateAge;
+mike.calculateAge();