Object-Oriented JavaScript - Third Edition

Exercises

Lets solve the following exercise:

1. Look at the following code:

           function F() { 
             function C() { 
              return this; 
             } 
             return C(); 
           } 
           var o = new F(); 
   

   Does the value of this refer to the global object or the object o?

2. What's the result of executing this piece of code?

           function C(){  
             this.a = 1; 
             return false; 
           } 
           console.log(typeof new C()); 
   

3. What's the result of executing the following piece of code?

           > c = [1, 2, [1, 2]]; 
           > c.sort(); 
           > c.join('--');  
           > console.log(c);  
   

4. Imagine the String() constructor didn't exist. Create a constructor function, MyString(), that acts like String() as closely as possible. You're not allowed to use any built-in string methods or properties, and remember that the String() doesn't exist. You can use this code to test your constructor: ...