lazy and lazy require js

var Lazy = function (getFunc) {
    var _value;
		
	return {
		get value() {
			if(!_value){
				_value = getFunc();
			}
			
			return _value;
		}
	};
};

var lazy = new Lazy(function(){ 
	console.log('get func called');
	return 1; 
});

console.log(lazy.value); // function will be called just once
console.log(lazy.value);


var lazyRequire = function (modules) {
	var lazy = {},
		propertyName;
	
	for(var i = 0; i < modules.length; i++) {
		propertyName = getPropertyName(modules[i]);
		Object.defineProperty(lazy, propertyName, { 
			get: getRequireFunc(modules[i])
		});
	}
	
	return lazy;
	
	function getRequireFunc(moduleName) {
		return function(){
			return require(moduleName);
		}
	}
	
	function getPropertyName(moduleName){
		var propertyName = "",
			metDash = false;
		
		for(var i = 0; i < moduleName.length; i++) {
			if(moduleName[i] === '-') {
				metDash = true;
				continue;
			}
			
			propertyName += metDash ? moduleName[i].toUpperCase() : moduleName[i];
			metDash = false;
		}
		
		return propertyName;
	}
};

var packages = new lazyRequire(['fs', 'gulp-uglify']);

console.log(packages.fs.F_OK); // require for 'fs' module will be called here
console.log(packages.gulpUglify); // require for 'gulp-uglify' module will be called here