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JavaScript - Built In Constructors

JavaScript has built-in constructors for native objects: 


var x1 = new Object();      // A new Object object
var x2 = new String();      // A new String object
var x3 = new Number();      // A new Number object
var x4 = new Boolean()      // A new Boolean object
var x5 = new Array();       // A new Array object
var x6 = new RegExp();      // A new RegExp object
var x7 = new Function();    // A new Function object
var x8 = new Date();        // A new Date object