javascript functions

functions.js

// ------ functions with closure

var y = 12345;
var z = 12345;

(function (y) {
    var x = "Hello!!";
console.log(y)
})();

// ------ functions with prototypes

var root = {
  speak: function(y) {
    console.log(this.name + ' ' + y);
  }
};

var newRoot = Object.create(root);
root.name = 'sally';
root.speak('peter');

// ------ functions with constructors

function Rabbit(type) {
  this.type = type;
  this.speak = function(line) {
    console.log(line);
  };
}

var newRabbit = new Rabbit('rabbit');
console.log(newRabbit.type);

Rabbit.prototype.speak = function(line) {
  console.log(line + 'proto');
};

newRabbit.speak('arg');