访问控制列表处理。
在下面的例子中,可以看到Scheme的列表处理透视图。
In the example below, you can see the list processing perspective of Scheme.
从确保规则命令尚未处理的检查开始,将根据上面所示的列表处理每个规则。
Each rule is processed according to the list shown above, beginning with a check to make sure that rule's command has not already been processed.
I'm going to print here the list if we go into it, and print of the when we're done and then just return that.
注意接下我来我要做的事,运行到这里时会打印列表,并且当处理完成后会打印返回的列表。
It took me seven comparisons, because I can take advantage of the fact I know I only ever have to look at the first element of each sub-list. Those are the only things I need to compare, and when I run out of one list, I just add the rest of the list in.
进行了7次对比,因为我可以利用我知道的优势:,每次只需要比较每个子列表的第一个元素,那才是我需要进行对比的内容,当一个列表的元素处理完了,只需要将另一个列表剩下的元素直接添加进去。
At each stage, no matter which branch, here or here, I take, I'm cutting down the length of the list that I'm searching in half. All right?
选的是这里还是那里,我总是把列表分成两半,对吧?,所以如果我处理一个长度为n的列表?
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