Just like sorters , filters are designed to be subclassed 和排序程序一样,过滤器也旨在被子类化。
The viewer uses a viewer sorter to sort its elements in two stages 查看器使用查看器排序程序以便采取两个步骤对它的元素排序。
Note that , as the names of the methods suggest , a viewer can have several filters at a time but only one sorter 注:正如这些方法的名称所表明的那样,一个查看器可以同时有多个过滤器,但只能有一个排序程序。
This instructs db2 to pass the index keys to the sort program in memory , rather than having the keys written to and read once again from sort work files on dasd 这将指示db2将索引键传递给内存中的排序程序,而不是再次将这些键写到dasd上的排序工作文件中,然后从中读取这些键。
It s also a lot easier to write than a sorting program ; for instance , you don t need to specify which keys you re not sorting on , or whether you want things in a random order alphabetically , lexicographically , or numerically 编写这个实用程序也比编写排序程序容易得多;例如,您不需要指定您没有对哪些键排序,或者是您希望按字母顺序、词法顺序还是按数字顺序随机排序。