smallpboy 發(fā)表于 2013-04-06 13:50
好久沒(méi)來(lái)cu逛了。有點(diǎn)不好意思發(fā)帖了。估計(jì)我這個(gè)又是個(gè)月經(jīng)貼。廢話不多說(shuō),疑惑如下:命令實(shí)現(xiàn)的是rev ...
The empty regular expression ‘//’ repeats the last regular expression match (the same holds if the empty regular expression is passed to the s command). Note that modifiers to regular expressions are evaluated when the regular expression is compiled, thus it is invalid to specify them together with the empty regular expression.
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