Reversing a string is a technique so that the 1st character becomes the last character and so on. Suppose we have a string called “prepinsta” so we have to find reverse of that string is “atsniperp” ...

给一个String, 里面的Word被single space split开来, 目的是reverse里面所有的Word, 但preserve Word 和 space order. #### Reverse function - Reverse Words in a String II 的降级版, 去掉第一个overall reverse就好了 ...