dottedfields.js

						// support dotted fields
						// N.B. ?select(name.en) returns {name: {en: 'Russia'}} while should {en: 'Russia'}
						// TODO: optimize!
						// first assign deeper properties
						for (var j = 0; j < fields.length; ++j) {
							if (fields[j].indexOf('.') < 0) continue;
							var r = results[i];
							var parts = fields[j].split('.');
							for (var k = 0; k < parts.length; ++k) {
								r = r[parts[k]];
							}
							results[i][parts[parts.length-1]] = r;
						}
						// then remove enclosing properties
						for (var j = fields.length; --j >= 0; ) {
							if (fields[j].indexOf('.') < 0) continue;
							var parts = fields[j].split('.');
							delete results[i][parts[0]];
						}