MVVM

唐巧blog

http://blog.devtang.com/2015/11/02/mvc-and-mvvm/

南峰子blog1

http://southpeak.github.io/blog/2014/08/08/mvvmzhi-nan-yi-:flickrsou-suo-shi-li/

南峰子blog2

http://southpeak.github.io/blog/2014/08/02/reactivecocoazhi-nan-er-:twittersou-suo-shi-li/

flattenmap和map

http://blog.csdn.net/abc649395594/article/details/46552865