谁能看看这段 Javascript 代码是什么含义?实现了什么功能？

var Namespace=(function(windows){ var _toArray = function(obj) { // checks if it's an array if (typeof(obj) == 'object' && obj.sort) { return obj; } return new Array(obj); }; var _namespace = function(identifier) { var klasses = arguments[1] || false; var ns = windows; if (identifier != '') { var parts = identifier.split(Namespace.separator); for (var i = 0, j = parts.length; i < j; i++) { if (!ns[parts[i]]) { ns[parts[i]] = {}; } ns = ns[parts[i]]; } } if (klasses) { for (var klass in klasses) { ns[klass] = klasses[klass]; } } //_dispatchEvent('create', { 'identifier': identifier }); return ns; }; _namespace.use = function(identifier,isglobal) { var _varscope =isglobal?windows:{}; var identifiers = _toArray(identifier); var callback = arguments[1] || false; for (var i = 0, j = identifiers.length; i < j; i++) { identifier = identifiers[i]; var parts = identifier.split(Namespace.separator); var target = parts.pop(); var ns = _namespace(parts.join(Namespace.separator)); if (target == '*') { // imports all objects from the identifier, can't use include() in that case for (var objectName in ns) { _varscope[objectName] = ns[objectName]; } } else { // imports only one object if (ns[target]) { // the object exists, import it _varscope[target] = ns[target]; } } } return _varscope; }; return _namespace; })(window) $.ajaxSetup({ cache: true }); Namespace.separator = '.'; 

使用方式是：

var _COnstant= Namespace('all.constant'); require(['commonutil'], function(ajaxUtil) { ajaxUtil.callrest('/bases/v1/sso/token', function(data) { if (data.code == "000000") { var _COnstant= Namespace('all.constant'); _Constant.TOKEN = data.data.TOKEN; } }, {}, false); });