一段关于读程序的经典的总结

    After decades of programming I don't even think about these three ways to read code. I just glance at it and know what it means. I can even glance at a whole screen of code, and all the bugs and errors jump out at me. That took an incredibly long time and quite a bit more study than is sane.

    To get that way, I learned these three ways of reading most any programming language:

        Front to back.   (从前往后)

        Back to front.（从后往前）

        Counter-clock-wise.  （逆时针看）