如何用Java命名HashMap? [英] How to name a HashMap in Java?

问题描述

这可能是一个愚蠢的问题，但是我从未找到一种令人满意的方式来在Java中命名类型为HashMap<K,V>的变量.例如-假设我有一个HashMap，其中每个存储桶都是<K,V>对，其中K是String表示州"，而V是Integer表示州县有.

This might be a silly question, but I have never found a satisfying way to name a variable of type HashMap<K,V> in Java. For example - lets say I have a HashMap where every bucket is a <K,V> pair where K is a String say representing "State" and V is an Integer representing the number of counties the state has.

HashMap是否应命名为"mapStateCounty"，"stateToCountyMap"等? 哪一个逻辑上听起来更吸引人并且更直观，却又不引起混淆和冗长?

Should the HashMap be named as "mapStateCounty", "stateToCountyMap", etc. ? Which one seems logically more appealing and intuitive to understand without sounding confusing and verbose?

推荐答案

我喜欢这个问题，因为Java不允许通过像[]这样的运算符进行地图访问.在其他语言中，我们可以说类似

I like this question because Java does not allow map access via an operator like []. In other languages we could say things like

numberOfCountiesIn["HI"]

或

countyCountOf["CA"]

或

numCountiesIn->{"MA"}

或(在Scala中，这很酷)

or (in Scala, this is cool)

numCountiesIn("WA")

等等.这些都不在Java中起作用，因为这个get愚蠢的单词！

and on and on. None of these work in Java, because of that silly get word!

countyCounts.get("NY")

确实！

我实际上认为countyCounts是最佳答案(IMHO)；我只是指出，对get的需求会限制一个人的选择.

I actually think countyCounts is the best answer (IMHO); I was just making the point that the need for get limits one's choices.

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