是这样的，今天和一白人男讨论他的西皮皮代码 (C++ code)

我问他为啥用 " null != x "？

he said he uses  null == x in if statements becase it is easy to mistakenly write if ( x = null ) instead of  if ( x == null ), both compile; However, null = x does not compile

and to be consistent, he use   null != x

我心想: K, 这多ugly啊，你要能记住每次都倒过来，为啥记不住 x equal equal null?