Map可以先按照value进行排序，然后按照key进行排序。 或者先按照key进行排序，然后按照value进行排序，这都是可以的。
Ref. to my last post and sellibitze\'s comment to that post on passing array by ref rather than by value, why is it that when I\'m passing array by value compiler can deduce arguments but it won\'t do
加载中,请稍侯......