Javascript review for the final.

Review of Javascript prototype inheritance. You also need to know Object.create and Object.getPrototypeOf.


    // Explain what the following Javascript does, what will
    // be printed, and why. 
    var myobject = {
    x: 5,
    m: function (y) {
    document.write(" I am here <br />");
    return this.x + y;
    }
    };

    document.write ("x = " + myobject.x + "<br />");
    document.write ("m call: " + myobject.m(5) + "<br />");

    var another = {
    z: "hi",
    m1: function() {
    return this.z + " there!";
    }
    };

    document.write ("m1 call: " + another.m1() + "<br />");
  
    // setting the object prototype after it's been created: 
    another.__proto__ = myobject;

    document.write ("m call: " + another.m(5) + "<br />");

    another['m2'] = function () {return this.z + " " + this.x};

    document.write ("m2 call: " + another.m2() + "<br />");

CSci 4651 course web site.

The views and opinions expressed in this page are strictly those of the page author. The contents of this page have not been reviewed or approved by the University of Minnesota.