How about this code, it uses Object.extend() instead of __proto__ for
creating inheritance chain as described here:
http://yehudakatz.com/2011/08/12/understanding-prototypes-in-javascript/
Looks pretty clean, though I'm not sure whether iterating over object
properties won't slow down the code. Could this technique be used
safely as replacement for constructor functions with prototypes?
Object.extend = function(prototype, object) {
var newObject = Object.create(prototype);
for (var prop in object) {
if (object.hasOwnProperty(prop)) {
newObject[prop] = object[prop];
}
}
return newObject;
};
var Human = {
// Init
init: function() {
console.log('initializing Human object');
},
// Properties and methods
legs: 2,
hands: 2,
eyes: 2,
isMammal: true,
sayHello: function() {
alert('hello');
}
}
//
// Man object, inherits from Human
//
var Man = Object.extend(Human, {
// Init
init: function() {
Human.init.call(this);
console.log('initilizing Man object');
return this;
},
// Properties and methods
gender: 'male',
});
//
// Man instance
//
var john = Object.create(Man).init();
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