摘要： 以下是一段LUA的代码，请教高手“perm{"a", "b", "c"}”为什么能返回一个tablefunction permgen (a, n)if n == 0 thencoroutine.yield(a)elsefor i=1,n do-- put i-th element as the last onea[n], a[i] = a[i], a[n]-- genera... 阅读全文