var number = 10;
console.log( "Number" === number.constructor );
var string = "str";
console.log( "String" === string.constructor );
var boolean = true;
console.log( "Boolean" === boolean.constructor );
var object = {};
console.log( "Object" === object.constructor );
var func = function(){};
console.log( "Function" === func.constructor );
var array = [];
console.log( "Array" === array.constructor );
var date = getDate();
console.log( "Date" === date.constructor );
var regexp = getRegExp();
console.log( "RegExp" === regexp.constructor );