从 .NET 字典中删除匹配谓词的多个项目的最佳方法?

本文介绍了从 .NET 字典中删除匹配谓词的多个项目的最佳方法?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 我需要从字典中删除多个项目.一个简单的方法如下:I need to remove multiple items from a Dictionary.A simple way to do that is as follows : List<string> keystoremove= new List<string>(); foreach (KeyValuePair<string,object> k in MyCollection) if (k.Value.Member==foo) keystoremove.Add(k.Key); foreach (string s in keystoremove) MyCollection.Remove(s);之所以不能直接Remove foreach块中的items是因为这样会抛出异常("Collection was modified...")The reason why I can't directly Remove the items in the foreach block is that this would throw an Exception ("Collection was modified...")我想做以下事情: MyCollection.RemoveAll(x =>x.Member==foo)但是 Dictionary 类没有像 List 类那样公开 RemoveAll(Predicate Match) 方法.But the Dictionary<> class doesn't expose a RemoveAll(Predicate<> Match) method, like the List<> Class does.做到这一点的最佳方式是什么(性能方面和优雅方面)?What's the best way (both performance wise and elegant wise) to do that?推荐答案这是另一种方式foreach ( var s in MyCollection.Where(kv => kv.Value.Member == foo).ToList() ) { MyCollection.Remove(s.Key);}直接将代码推入列表可以避免枚举时删除"问题..ToList() 将在 foreach 真正开始之前强制枚举.Pushing the code into a list directly allows you to avoid the "removing while enumerating" problem. The .ToList() will force the enumeration before the foreach really starts. 这篇关于从 .NET 字典中删除匹配谓词的多个项目的最佳方法?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！