Most of these methods (First, Single, Any, ) cannot be. Single will return a single result, but will throw an exception if it finds none or more than one (which may or may not be what you want): Note that SingleOrDefault() will behave the same, except it will return null for reference types, or the default value for value types, instead of throwing an exception. > var boys = new List {"Harry", "Ron", "Neville"}; > boys.IndexOf ("Neville") 2 > boys [2] == "Neville" True This will help you in getting the first or default value in your LINQ List search This search will find the first or default value, which it will return. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I think I'm not undertanding LINQ well. Making statements based on opinion; back them up with references or personal experience. Asking for help, clarification, or responding to other answers. What you could do, if you don't want to do it the first way and if your collection is a list already (but not an IEnumerable) you can use the ForEach extension method in linq to do what you're asking. Adding EV Charger (100A) in secondary panel (100A) fed off main (200A). I suspect that this can be written shorter using LINQ over objects syntax. Find centralized, trusted content and collaborate around the technologies you use most. The i.age = 10 part is not different from the item.age = 10 part. Which reverse polarity protection is better and why? Connect and share knowledge within a single location that is structured and easy to search. One possible way to do this is to use ToLookup(): Another way to do basically the same thing would be using join: Also, you should really use better variable names. Find centralized, trusted content and collaborate around the technologies you use most. Not knowing the full extent of the data types behind the MatchA, MatchB and ToUpdate properties, it'll be difficult to give an answer which completely solves your performance issues. Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? Folder's list view has different sized fonts in different folders. What is Wario dropping at the end of Super Mario Land 2 and why? Does a password policy with a restriction of repeated characters increase security? rev2023.5.1.43405. How do I clone a list so that it doesn't change unexpectedly after assignment? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 8 Answers. foreach(var item in self) { By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Would My Planets Blue Sun Kill Earth-Life? Find centralized, trusted content and collaborate around the technologies you use most. //d And the enumerable containing the objects isn't modified at all. What's the cheapest way to buy out a sibling's share of our parents house if I have no cash and want to pay less than the appraised value?
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