1.03 - the mutability of objects.js

JS设计模式源代码

function displayError(message) {
  displayError.numTimesExecuted++;
  alert(message);
};
displayError.numTimesExecuted = 0;


/* Class Person. */

function Person(name, age) {
  this.name = name;
  this.age = age;
}
Person.prototype = {
  getName: function() {
    return this.name;
  },
  getAge: function() {
    return this.age;
  }
}

/* Instantiate the class. */

var alice = new Person('Alice', 93);
var bill = new Person('Bill', 30);

/* Modify the class. */

Person.prototype.getGreeting = function() {
  return 'Hi ' + this.getName() + '!';
};

/* Modify a specific instance. */

alice.displayGreeting = function() {
  alert(this.getGreeting());
}