JavaScript Data Types // source http://jsbin.com/sogahuj/edit?js,console

js.data.types.js

// Based on: http://bonsaiden.github.io/JavaScript-Garden/#types
var types = [
    {n: 'Array', c: Array, o: []},
    {n: 'new Array', c: Array, o: new Array()},
    {n: 'String', c: String, o: ''},
    {n: 'new String', c: String, o: new String()},
    {n: 'Number', c: Number, o: 0},
    {n: 'new Number', c: Number, o: new Number()},
    {n: 'Function', c: Function, o: function(){}},
    {n: 'new Function', c: Object, o: new function(){}},
    {n: 'Object', c: Object, o: {}},
    {n: 'new Object', c: Object, o: new Object()},
    {n: 'Boolean', c: Boolean, o: false},
    {n: 'new Boolean', c: Boolean, o: new Boolean()},
    {n: 'RegExp', c: RegExp, o: /regularexpression/},
    {n: 'new RegExp', c: RegExp, o: new RegExp()},
    {n: 'new Date', c: Date, o: new Date()},
    {n: 'new Error', c: Error, o: new Error()},
    {n: 'Null', c: Object, o: null},
    {n: 'Undefined', c: Object, o: undefined},
];

types.forEach(function(t)
{
    console.log('---------- ' + t.n + ' ----------');
    console.log(t.o);
    console.log(t.c);
    
    // The instanceof operator tests whether the prototype property of a constructor
    // appears anywhere in the prototype chain of an object.
    console.log('instanceof: ' + (t.o instanceof t.c));
    console.log('prototype: ' + Object.prototype.toString.call(t.o));
    console.log('typeof: ' + typeof t.o);
});

// The only way to determine an object's [[Class]] value is using
function is(object, type) {
    return Object.prototype.toString.call(object).search(type) >= 0;
}