问题描述
这个问题很难用语言表达,但这是我的情况.我在名为 monsters
的数组中有几个Monster对象.每个怪物都有一个 name
属性,它是一个字符串.我有另一个名为 monsterNames
的数组,其中包含几个怪物名称(如Strings).
The question was difficult to put into words, but here is my situation. I have several Monster objects in an array called monsters
. Each monster has a name
property which is a String.I have a second array called monsterNames
, which contains several monster names (as Strings).
我希望能够根据单个怪物对象的name属性是否出现在 monsterNames
数组中来过滤 monsters
数组中的所有怪物对象.
I want to be able to filter all the monster objects in monsters
array based on whether the individual monster object's name property appears in the monsterNames
array.
到目前为止,我一直在寻找解决方案,我只发现了基于单个条件进行过滤的解决方案,这使我只能基于 monsterNames
数组中的单个怪物名称进行过滤.有人可以帮我找到有效的解决方案吗?
I have been looking at solutions so far I have only found solutions that filter based on a single condition, which allows me to only filter based on a single monster name in the monsterNames
array. Can anybody help me find an efficient solution to this?
推荐答案
您可以执行以下操作:
let monsters: [Monster] = ...
let monsterNames: [String] = ...
let filteredMonsters = monsters.filter { monsterNames.contains($0.name) }
这不能很好地执行,因为它会遍历每个怪物的 names
数组最多 n
次,但是如果您的 names
数组很小,这不会有问题.
This doesn't perform all that well, since it will go over the names
array up to n
times for each monster, but if your names
arrays is small, this won't be a problem.
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