tree 68366e7a50b4d03c3538fe80da01a7f8eaea5bb8
parent 6fbea5d90dad016c41ca11a28bfb914f2783ed82
author Jinjiang <zhaojinjiang@me.com> 1466854738 +0800
committer Jinjiang <zhaojinjiang@me.com> 1466857686 +0800

rewrite in es6