Mixin pattern example in Javascript.

mixin_pattern_example

var Person = function (name, age) {
   this.name = name;
   this.age = age;
}
 
function extend(destination, source) {
  for (var k in source) {
    if (source.hasOwnProperty(k)) {
      destination[k] = source[k];
    }
  }
  return destination; 
}

extend(Person.prototype, mixin);

var person = new Person('Baris', 13)
person.getName();
person.getAge();

var Person2 = function (name, age) {
   this.name = name;
   this.age = age;
} 

var mixin2 = function () {
   this.getName = function () {
      return this.name;
   };
   this.getAge = function () {
      return this.age;
   }
}

mixin2.call(Person2.prototype);

var person2 = new Person2('Takinardi', 12);