Perfect property: Locating a table entry requires o (1) time-that is, at most, one string comparison is required to perform keyword recognition within the static search set.
perfect property：查找时间复杂度为o(1)的表条目—就是说，至多需要一个字符串比较执行静态搜索集中的关键字识别。
If we have already allocated memory for a new entry, adding it will be o (1).
如果已经为新条目分配好内存，添加动作将耗时o (1)。
应用推荐