"There is no justification for the international forces to rescue their own national, and retrieve the dead body of their own soldier killed in action, and leave behind the dead body of Sultan Munadi in the area."
VOA: standard.2009.09.10
So it doesn't matter how big the dictionary is, you can instantaneously retrieve the value associated with the key. Extremely powerful.
因为你可以在线性时间,内得到想要的键对应的值,这太强大了。
Dictionaries are implemented using a magic technique called hashing, which we'll look at a little bit later in the term, which allows us to retrieve keys in constant time.
散列法的内容,此方法可以让我们在线性,时间内检索到键,因此字典的大小并不重要了。
And I do that very precisely because it'll teach you a little bit about how easy or difficult it is to do it and what kind of information you retrieve from a dietary assessment.
我这样要求是因为,这能教给你,做评估的难易程度,以及你们能从饮食评估中得到何种信息
No way to retrieve it.
也没有办法找回。
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