通过搜索键子字符串返回字典中键的存在 [英] Returning the existence of a key in a dict by searching key substring

问题描述

我有一个字符串人(键)和字符串地址(值)的字典.我想拥有一个if语句，如果我的词典中的任何键包含子字符串"anders"，则返回true.有什么办法吗?我已经尝试过dict.ContainsKey("anders")，但是如果任何键被显式命名为'anders'，它只会返回true.我希望它即使键为Anderson或Andersen也能返回true.我知道这是一个很奇怪的情况，但我出于目的需要它.

I have a dictionary of string people (key) and string addresses (value). I want to have an if statement that returns true if any key in my dictionary contains the substring 'anders'. Is there any way to do this? I have tried dict.ContainsKey("anders") but that just returns true if any key is explicitly named 'anders'. I would like it to return true even if the key is anderson or andersen. I know this is a pretty strange case but i need it for a purpose.

谢谢

推荐答案

字典关键字没有通配符搜索".为了进行这种类型的搜索，您将失去字典给您的O(常量)搜索.

There is no "wildcard search" for dictionary keys. In order to do this type of search, you are going to lose the O(constant) search that a dictionary gives you.

您将必须遍历字典的键，并查找包含所需子字符串的键.请注意，这将是O(n * X)迭代，其中n是键的数量，X是键字符串的平均大小.

You'll have to iterate over the keys of the dictionary and look for those that contain the substring you require. Note that this will be an O(n*X) iteration, where n is the number of keys and X is the average size of your key string.

有一个漂亮的单线可以帮助您:

There's a nifty one-liner that will help:

bool containsKey = myDictionary.Keys.Any(x => x.Contains("mySubString"));

但这是一项繁重的操作.

But it's a heavy operation.

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