7.1. Javascript Prototypes¶

7.1.1. Object Creation¶

To try:

x = Object.create(null)
x.bar = 1
x.foo = function() {
    console.log(this.bar)
}
x.foo()


y = Object.create(x)
y.foo()
y.bar=2
y.foo()


z = function() {
    this.bar = 2
    this.foo = function() {
        console.log(this.bar)
    }
    return this
}

z1 = z()
z1.foo()

myClass = function() {
    this.bar = 22
    this.foo = function() {
        console.log(this.bar)
    }
}

z2 = new myClass()
z2.foo()
console.log(z2.prototype)


MyClass = function(x,y,z) {
     var priv = x
     this.pub = y
     //if (z == undefined) {
     //      z = 'default value'
     //}
     this.something = z

     var innerFunc = function() {
             priv = priv + 1
     }

     this.publicFunction =function(z) {
             priv = priv + z
             return priv
     }

}

MyClass.prototype.outerfunction = function(a) {
     this.pub = this.pub + a
     //priv = priv + 1
     return this.pub
}

foo = new MyClass(10,20,30)
console.log(foo.outerfunction(99))
console.log(foo.publicFunction(99))
//foo.innerFunc()

7.1.2. Exercise¶

Create a Person class, they should have private ivars for ssn and weight. public ivars for age and name. public methods for gainWeight, getSSN, and getWeight. add a prototype method for birthday that adds one to the age, and also returns the new age.