Fun with JavaScript Prototypes

fun_with_javascript_prototypes.js

// Fun

Object instanceof Function               // true
Function instanceof Object               // true

// Types of various prototype objects:

typeof Object.prototype   === 'object'   // true
typeof Boolean.prototype  === 'object'   // true
typeof Number.prototype   === 'object'   // true
typeof String.prototype   === 'object'   // true

typeof Function.prototype === 'function' // true, see: http://ecma262-5.com/ELS5_HTML.htm#Section_15.3.4
Function.prototype instanceof Function   // false
Function.prototype instanceof Object     // true

// Other interesting stuff

Object.prototype is {/* object with built-in methods, e.g hasOwnProperty, toString, etc. */}
(Object.prototype).__proto__ === null       // true, top of prototype chain
(Object.prototype).prototype === undefined  // true, instances of Object have no 'prototype' property

Function.prototype is {/* function with built-in methods, e.g apply, call, etc. */}
(Function.prototype).__proto__ === Object.prototype // true, see: http://ecma262-5.com/ELS5_HTML.htm#Section_15.3.4
(Function.prototype).prototype === undefined        // true, because: Function.prototype is an instance of Object

Object.__proto__   === Function.prototype    // true, Object is a constructor (function) thus an instance of Function
Function.__proto__ === Function.prototype    // true, Function is a constructor (function) thus an instance of Function