tangjie/app — Issue #1: add string handy function
Author: imoldman
Created: 2011-11-06 07:54:44+00:00
State: open

we need some string handy function, such as trim/join/split/compare/upper/lower and so on.
so we should add them.

ref: http://www.boost.org/doc/libs/1_47_0/doc/html/string_algo.html