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Oop in java script

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Pierre Spring
Pierre Spring

Presentation on Classical Inheritance Patterns in JavaScript.

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{}
{} 1 'nelm.io' true undefined null
{}
new Object();
{} // v.s. new Object();
(function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
(function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
(function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
(function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
(function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
(function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
{} new Object();
var o = new Object(1); console.log(o.constructor); // function Number() { } // new Number(1);
var o = new Object('1'); console.log(o.constructor); // function String() { } // new String('1');
var o = new Object(true); console.log(o.constructor); // function Boolean() { } // new Boolean(true);
var a = {}; var b = new Object(); var c = Object();
var a = {}; var b = new Object(); var c = Object();
var a = {}; var b = new Object(); var c = Object();
new
new Object();
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = Car('Fiat'); // undefined
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = Car('Fiat'); // undefined
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
var Car, myCar; Car = function (brand) { this.brand = brand; console.log( this.constructor === Car ); // true }; myCar = new Car('Fiat');
var Car, myCar; Car = function (brand) { this.brand = brand; console.log( this.constructor === Car ); // undefined }; myCar = Car('Fiat');
var Car, myCar; Car = function (brand) { if (this.constructor !== Car) { return new Car(brand); } this.brand = brand; }; myCar = Car('Fiat');
var Car, myCar; Car = function (brand) { if (this.constructor !== Car) { return new Car(brand); } this.brand = brand; }; myCar = new Car('Fiat');
prototype
{} prototype
var C = function () {}; console.log(C.prototype); { constructor: C, __proto__: Object.prototype }
var C = function () {}; console.log(C.prototype); { constructor: C, __proto__: Object.prototype }
var C = function () {}; console.log(C.prototype); { constructor: C, __proto__: Object.prototype }
var C = function () {}; console.log(C.prototype); { constructor: C, __proto__: Object.prototype }
var C = function () {}; console.log(C.prototype); { constructor: C, __proto__: Object.prototype }
var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C // !!! }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
var C = function () {}; C.prototype.a = "A"; C.prototype.b = "B"; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
var C = function () {}; C.prototype.a = "A"; C.prototype.b = "B"; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
{} prototype
property v.s. attribute
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
property v.s. attribute
var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
{} prototype
inheritance
classical inheritance modern
classical inheritance
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {}; inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {} inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {} inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {}; inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {} inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {} inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {}; inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
var inherit = function (Child, Parent) { Child.prototype = new Parent(); }
var inherit = function (Child, Parent) { Child.prototype = new Parent(); } myCar = new ItalianCar(); myCar.getBrand(); // 'Homemade'
var inherit = function (Child, Parent) { Child.prototype = new Parent(); } myCar = new ItalianCar(); myCar.getBrand(); // 'Homemade'
var inherit = function (Child, Parent) { Child.prototype = new Parent(); } myCar = new ItalianCar(); myCar.getBrand(); // 'Homemade'
var inherit = function (Child, Parent) { Child.prototype = new Parent(); } myCar = new ItalianCar(); myCar.getBrand(); // 'Homemade'
myCar.brand = "Fiat"; myCar.getBrand(); // 'Fiat'
myCar.getBrand(); // 'Fiat'
myCar = new ItalianCar(); myCar.brand = 'Fiat';
myCar = new ItalianCar('Fiat')
myCar = new ItalianCar('Fiat') myCar.getBrand(); // 'Homemade'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {} inherit(ItalianCar, Car); // ItalianCar.prototype = new Car();
classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
ItalianCar = function (brand) { Car.apply(this, [brand]); }
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat';
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat';
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat';
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat';
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat';
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand; // 'undefined'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand; // 'undefined'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand; // 'undefined'
classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car();
ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car();
ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car();
ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car();
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand; // 'undefined'
classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
var inherit = function (Child, Parent) { Child.prototype = Parent.prototype; }
classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); }
var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); }
var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); }
var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); }
var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); }
inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; }
var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; }
var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; }
var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; }
classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
classical inheritance 1. Default Pattern klass 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
var first = new Man('Adam'); // logs 'man constructor' first.getName(); // 'Adam'
var first = new Man('Adam'); // logs 'man constructor' first.getName(); // 'Adam'
var first = new Man('Adam'); // logs 'man constructor' first.getName(); // 'Adam'
var first = new Man('Adam'); // logs 'man constructor' first.getName(); // 'Adam'
var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
var clark = new SuperMan('Clark Kent'); // logs 'man constructor' // and 'super man constructor' clark.getName(); // 'I am Clark Kent'
var clark = new SuperMan('Clark Kent'); // logs 'man constructor' // and 'super man constructor' clark.getName(); // 'I am Clark Kent'
var clark = new SuperMan('Clark Kent'); // logs 'man constructor' // and 'super man constructor' clark.getName(); // 'I am Clark Kent'
var clark = new SuperMan('Clark Kent'); // logs 'man constructor' // and 'super man constructor' clark.getName(); // 'I am Clark Kent'
var clark = new SuperMan('Clark Kent'); // logs 'man constructor' // and 'super man constructor' clark.getName(); // 'I am Clark Kent'
var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } };
Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } };
Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } };
Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } };
Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } };
Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
X

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Oop in java script

  • 1.
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7. {}
  • 8. {} 1 'nelm.io' true undefined null
  • 9. {}
  • 12. (function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
  • 13. (function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
  • 14. (function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
  • 15. (function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
  • 16. (function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
  • 17. (function (){ var Object = function () { this.changed = true; } console.log(new Object()); }()); // {changed: true}
  • 19. var o = new Object(1); console.log(o.constructor); // function Number() { } // new Number(1);
  • 20. var o = new Object('1'); console.log(o.constructor); // function String() { } // new String('1');
  • 21. var o = new Object(true); console.log(o.constructor); // function Boolean() { } // new Boolean(true);
  • 22. var a = {}; var b = new Object(); var c = Object();
  • 23. var a = {}; var b = new Object(); var c = Object();
  • 24. var a = {}; var b = new Object(); var c = Object();
  • 25. new
  • 27. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
  • 28. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
  • 29. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
  • 30. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
  • 31. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = Car('Fiat'); // undefined
  • 32. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = Car('Fiat'); // undefined
  • 33. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
  • 34. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); // {brand: 'Fiat'}
  • 35. var Car, myCar; Car = function (brand) { this.brand = brand; console.log( this.constructor === Car ); // true }; myCar = new Car('Fiat');
  • 36. var Car, myCar; Car = function (brand) { this.brand = brand; console.log( this.constructor === Car ); // undefined }; myCar = Car('Fiat');
  • 37. var Car, myCar; Car = function (brand) { if (this.constructor !== Car) { return new Car(brand); } this.brand = brand; }; myCar = Car('Fiat');
  • 38. var Car, myCar; Car = function (brand) { if (this.constructor !== Car) { return new Car(brand); } this.brand = brand; }; myCar = new Car('Fiat');
  • 41. var C = function () {}; console.log(C.prototype); { constructor: C, __proto__: Object.prototype }
  • 42. var C = function () {}; console.log(C.prototype); { constructor: C, __proto__: Object.prototype }
  • 43. var C = function () {}; console.log(C.prototype); { constructor: C, __proto__: Object.prototype }
  • 44. var C = function () {}; console.log(C.prototype); { constructor: C, __proto__: Object.prototype }
  • 45. var C = function () {}; console.log(C.prototype); { constructor: C, __proto__: Object.prototype }
  • 46. var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
  • 47. var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
  • 48. var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C // !!! }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
  • 49. var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
  • 50. var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
  • 51. var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
  • 52. var C = function () {}; C.prototype = { a: "A", b: "B", constructor: C }; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
  • 53. var C = function () {}; C.prototype.a = "A"; C.prototype.b = "B"; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
  • 54. var C = function () {}; C.prototype.a = "A"; C.prototype.b = "B"; console.log(C.prototype); { a: "A", b: "B", constructor: C, __proto__: Object.prototype }
  • 57. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
  • 58. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
  • 59. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
  • 60. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
  • 61. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
  • 62. var Car, myCar; Car = function (brand) { this.brand = brand; }; myCar = new Car('Fiat'); Car.prototype; // { /* ... */ } myCar.prototype; // undefined
  • 64. var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
  • 65. var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
  • 66. var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
  • 67. var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
  • 68. var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
  • 69. var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
  • 70.
  • 71.
  • 72. var Car, myCar; Car = function (brand) { this.brand = brand; }; Car.prototype.getBrand = function () { return this.brand; }; myCar = new Car('Fiat'); myCar.brand; myCar.getBrand();
  • 77. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {}; inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
  • 78. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {} inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
  • 79. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {} inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
  • 80. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {}; inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
  • 81. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {} inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
  • 82. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {} inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
  • 83. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {}; inherit(ItalianCar, Car); myCar = new ItalianCar('Fiat');
  • 84. classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
  • 85. classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
  • 86. var inherit = function (Child, Parent) { Child.prototype = new Parent(); }
  • 87. var inherit = function (Child, Parent) { Child.prototype = new Parent(); } myCar = new ItalianCar(); myCar.getBrand(); // 'Homemade'
  • 88. var inherit = function (Child, Parent) { Child.prototype = new Parent(); } myCar = new ItalianCar(); myCar.getBrand(); // 'Homemade'
  • 89. var inherit = function (Child, Parent) { Child.prototype = new Parent(); } myCar = new ItalianCar(); myCar.getBrand(); // 'Homemade'
  • 90. var inherit = function (Child, Parent) { Child.prototype = new Parent(); } myCar = new ItalianCar(); myCar.getBrand(); // 'Homemade'
  • 93. myCar = new ItalianCar(); myCar.brand = 'Fiat';
  • 94. myCar = new ItalianCar('Fiat')
  • 95. myCar = new ItalianCar('Fiat') myCar.getBrand(); // 'Homemade'
  • 96. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) {} inherit(ItalianCar, Car); // ItalianCar.prototype = new Car();
  • 97. classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
  • 98. ItalianCar = function (brand) { Car.apply(this, [brand]); }
  • 99. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat';
  • 100. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat';
  • 101. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat';
  • 102. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat';
  • 103. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat';
  • 104. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand; // 'undefined'
  • 105. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand; // 'undefined'
  • 106. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand; // 'undefined'
  • 107.
  • 108. classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
  • 109. ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car();
  • 110. ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car();
  • 111. ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car();
  • 112. ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car();
  • 113. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
  • 114. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
  • 115. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
  • 116. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
  • 117. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
  • 118. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
  • 119. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
  • 120. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
  • 121. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } ItalianCar.prototype = new Car(); myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand(); // 'Fiat' delete myCar.brand; myCar.getBrand(); // 'Homemade'
  • 122. var Car, ItalianCar, myCar; Car = function (brand) { this.brand = brand || 'Homemade'; } Car.prototype.getBrand = function () { return this.brand; } ItalianCar = function (brand) { Car.apply(this, [brand]); } myCar = new ItalianCar('Fiat'); myCar.brand; // 'Fiat'; myCar.getBrand; // 'undefined'
  • 123.
  • 124. classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
  • 125. var inherit = function (Child, Parent) { Child.prototype = Parent.prototype; }
  • 126.
  • 127. classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
  • 128. var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); }
  • 129. var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); }
  • 130. var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); }
  • 131. var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); }
  • 132. var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); }
  • 133.
  • 134. inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
  • 135. inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
  • 136. inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
  • 137. inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
  • 138. inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
  • 139. inherit(ItalianCar, Car); myCar = new ItalianCar(); myCar.brand; // undefined myCar.getBrand; // function
  • 140. var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; }
  • 141. var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; }
  • 142. var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; }
  • 143. var inherit = function (Child, Parent) { var F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; }
  • 144. classical inheritance 1. Default Pattern 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
  • 145. classical inheritance 1. Default Pattern klass 2. Rent-a-Constructor 3. Rent and Set Prototype 4. Share Prototype 5. Temp. Constructor
  • 146. var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
  • 147. var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
  • 148. var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
  • 149. var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
  • 150. var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
  • 151. var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
  • 152. var Parent = klass( null, { __construct: function () {}, someMethod: function () {} } ); var Child = klass( Parent, { __construct: function () {}, childMethod: function () {} } );
  • 153. var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
  • 154. var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
  • 155. var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
  • 156. var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
  • 157. var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
  • 158. var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
  • 159. var Man = klass( null, { __construct: function (what) { console.log('man constructor'); this.name = what; }, getName: function () { return this.name; } } );
  • 160. var first = new Man('Adam'); // logs 'man constructor' first.getName(); // 'Adam'
  • 161. var first = new Man('Adam'); // logs 'man constructor' first.getName(); // 'Adam'
  • 162. var first = new Man('Adam'); // logs 'man constructor' first.getName(); // 'Adam'
  • 163. var first = new Man('Adam'); // logs 'man constructor' first.getName(); // 'Adam'
  • 164. var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
  • 165. var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
  • 166. var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
  • 167. var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
  • 168. var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
  • 169. var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
  • 170. var SuperMan = klass( Man, { __construct: function (what) { console.log('super man constructor'); }, getName: function () { var name = SuperMan.uber.getName.call(this); return 'I am ' + name; } } );
  • 171. var clark = new SuperMan('Clark Kent'); // logs 'man constructor' // and 'super man constructor' clark.getName(); // 'I am Clark Kent'
  • 172. var clark = new SuperMan('Clark Kent'); // logs 'man constructor' // and 'super man constructor' clark.getName(); // 'I am Clark Kent'
  • 173. var clark = new SuperMan('Clark Kent'); // logs 'man constructor' // and 'super man constructor' clark.getName(); // 'I am Clark Kent'
  • 174. var clark = new SuperMan('Clark Kent'); // logs 'man constructor' // and 'super man constructor' clark.getName(); // 'I am Clark Kent'
  • 175. var clark = new SuperMan('Clark Kent'); // logs 'man constructor' // and 'super man constructor' clark.getName(); // 'I am Clark Kent'
  • 176. var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 177. var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 178. var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 179. var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 180. var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 181. Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } };
  • 182. Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } };
  • 183. Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } };
  • 184. Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } };
  • 185. Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } };
  • 186. Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
  • 187. Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
  • 188. Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
  • 189. Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
  • 190. Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
  • 191. Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child;
  • 192. var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 193. var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 194. var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 195. var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 196. var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 197. var klass = function (Parent, props) { /* ... */ for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 198. var klass = function (Parent, props) { var Child, F, i; Child = function () { if (Child.uber && Child.uber.hasOwnProperty('__construct')) { Child.uber.__construct.apply(this, arguments); } if (Child.prototype.hasOwnProperty('__construct')) { Child.prototype.__construct.apply(this, arguments); } }; Parent = Parent || Object; F = function () {}; F.prototype = Parent.prototype; Child.prototype = new F(); Child.uber = Parent.prototype; Child.prototype.constructor = Child; for (i in props) { if (props.hasOwnProperty(i)) { Child.prototype[i] = props[i]; } } return Child; };
  • 199. X