tree e1db7fed61acce4598c8df5a429900eabaf6da45
parent c6b86fabfb3ac2bd365fe1c1c79acbd01064db72
author pingping-lin <pingping@onlab.us> 1417549614 -0800
committer pingping-lin <pingping@onlab.us> 1417549614 -0800

improve the code to make it more readable