Unexpected uint64 behaviour 0xFFFF'FFFF'FFFF'FFFF - 1 = 0? Which was the first Sci-Fi story to predict obnoxious "robo calls"? How can I get the index of an item in a list in a single step? UPDATE This can be simplified to be listOf There are certainly ways to (ab)use LINQ to achieve the same results, but I'd consider them to be dirty hacks. Asking for help, clarification, or responding to other answers. Embedded hyperlinks in a thesis or research paper. Simple deform modifier is deforming my object. If we had a video livestream of a clock being sent to Mars, what would we see? How can I control PNP and NPN transistors together from one pin? I'm not happy yet.
I really don't understand why you say it's not meant for this. Connect and share knowledge within a single location that is structured and easy to search. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I mean, if PopulateChanges() is returning you a List<> of DateTime arrays, and you are going through all of them and setting them to DateTime.MinValue, what exactly is the code unit that you want to put in the delegate? This article shows the three ways in which you can write a LINQ query in C#: Use query syntax. Use method syntax. Use a combination of query syntax and method syntax. The following examples demonstrate some simple LINQ queries by using each approach listed previously. I guess what I'm really saying here is I want a concise way to set all elements of a multi-dimensional array to a given value. rev2023.5.1.43405.
List How a top-ranked engineering school reimagined CS curriculum (Ep. The below is practically the same as the answer provided by Florian Schmidinger: Thanks for contributing an answer to Stack Overflow! Is "I didn't think it was serious" usually a good defence against "duty to rescue"? 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? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Find centralized, trusted content and collaborate around the technologies you use most. So any LINQ way to search like "from .. in where select", Nah, sorry. I suspect that this can be written shorter using LINQ over objects syntax. Connect and share knowledge within a single location that is structured and easy to search. Since you haven't given any indication to what you want, here is a link to 101 LINQ samples that use all the different LINQ methods: 101 LINQ Samples. from c in listOfCompany where c.id == 1 select c => What differentiates living as mere roommates from living in a marriage-like relationship? I don't really see how this is any different. In my application I have a list of items I need to sort by price and set a rank/position index for each item. I used to use a Dictionary which is some sort of an indexed list which will give me exactly what I want when I want it. But,in my case, I must repeat the foreach in many collections, and I didn't want to repeat the loop. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? Find centralized, trusted content and collaborate around the technologies you use most. Folder's list view has different sized fonts in different folders. If you really want to use linq, you can do something like this. And the enumerable containing the objects isn't modified at all. Web14. For multiple. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. It's exactly what I was looking for, How a top-ranked engineering school reimagined CS curriculum (Ep. How are engines numbered on Starship and Super Heavy? There are a few ways (note that this is not a complete list). If the null hypothesis is never really true, is there a point to using a statistical test without a priori power analysis? Thanks for contributing an answer to Stack Overflow! Thanks for contributing an answer to Stack Overflow!
c# - conditional Updating a list using LINQ - Stack Overflow Hm, using your example and stuffing various random data into the objects into the two lists of the sizes you specify, it executes in less than 1/100 second on my machine. //d Why are players required to record the moves in World Championship Classical games?
I want to compare these lists using LINQ and if IDs from both lists are equal, I want to set WorkingID in the first list, A list. It's better to operate on List. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. The OP since updated the question and having it makes no more sense at all since it's true 100% of the time. rev2023.5.1.43405. I'm querying to return every element of a List
, so I can then set those values. Simply put: what you're doing is, it will create new list which will replace old one, BTW the only LINQ here is. Nevermind, actually you can get rid of the lambdas for a few cases Great answers! c# - assign value using linq - Stack Overflow "Signpost" puzzle from Tatham's collection. Short story about swapping bodies as a job; the person who hires the main character misuses his body. For the sake of the example, T in this case is an object similar to the following: Is there a way I can make this more efficient? Ok, this should hopefully be of some help: I would also look into PLINQ as you have a lot of data to plow through. Adding EV Charger (100A) in secondary panel (100A) fed off main (200A). correctionQoutas is a custom object that has four properties. Use LINQ to get items in one List<>, that are not in another List<>. Can you use lambda expressions and .find? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. How to set Name value as ID in List in c# using Linq? Generic Doubly-Linked-Lists C implementation, "Signpost" puzzle from Tatham's collection, Embedded hyperlinks in a thesis or research paper. How would you do a "not in" query with LINQ? Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? Thanks. You can remove the .ToList call. Normally I use a for loop or anonymous delegate to do it like this: LINQ is new for me. Think about a typical Linq2SQL query where you query data and then update the values. Find centralized, trusted content and collaborate around the technologies you use most. Web3. Can I use my Coinbase address to receive bitcoin? Find centralized, trusted content and collaborate around the technologies you use most. Google "LINQ side effects" for more information. Is "I didn't think it was serious" usually a good defence against "duty to rescue"? Why refined oil is cheaper than cold press oil? For Starship, using B9 and later, how will separation work if the Hydrualic Power Units are no longer needed for the TVC System? I'm trying this but can't get it right: LINQ is not really intended to be used for updating collections. The only difference between them is that the .First method will throw an exception if there is no such object in the collection when the second one returns the An interesting question, but Linq is about querying and what you're doing here doesn't look much like a query to me. What were the most popular text editors for MS-DOS in the 1980s? How to force Unity Editor/TestRunner to run at full speed when in background? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Most of these methods (First, Single, Any, ) cannot be. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Great answer. Not the answer you're looking for? Not the answer you're looking for? ', referring to the nuclear power plant in Ignalina, mean? A boy can regenerate, so demons eat him for years. Should I re-do this cinched PEX connection? What is Wario dropping at the end of Super Mario Land 2 and why? You can create a extension method: public static IEnumerable Do(this IEnumerable self, Action action) { While you can use a ForEach extension method, if you want to use just the framework you can do collection.Select (c => {c.PropertyToSet = value; return Why? Can I use LINQ to find an item in the list? Let me try to look it up. What is the symbol (which looks similar to an equals sign) called? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. In my application I have a list of items I need to sort by price and set a rank/position index for each item. Making statements based on opinion; back them up with references or personal experience. The property value is not changed. I need to store the rank because the price may change afterward. Weighted sum of two random variables ranked by first order stochastic dominance. I think your code is perfectly readable and won't improve much if you force it to have lots of lambdas and such. Where can I find a clear diagram of the SPECK algorithm? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. For Starship, using B9 and later, how will separation work if the Hydrualic Power Units are no longer needed for the TVC System? Why did US v. Assange skip the court of appeal? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Use LINQ to get items in one List<>, that are not in another List<>, Simple deform modifier is deforming my object. I am using below linq query to set value of SecKey, but I still see the old value in list studentData, below id the sample I am Can you perhaps include some description of your answer instead of just posting a blob of code? c# - Find an item in a list by LINQ - Stack Overflow To learn more, see our tips on writing great answers. Even if there is a solution out there, I'm not sure I'd use Linq for something like this. Why don't we use the 7805 for car phone chargers? I don't have a C# compiler here but maybe AddRange instead of Add works: I have another List that contains the data, this just maps each element of the string array to a time when they last changed. What are the advantages of running a power tool on 240 V vs 120 V? Is there any known 80-bit collision attack? { By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. A boy can regenerate, so demons eat him for years. Thanks for contributing an answer to Stack Overflow! How do I remedy "The breakpoint will not currently be hit. It's not them. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? It was designed to bring native data querying to .NET. 20 : 30)) By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. As sircodesalot mentioned, you can't use linq to do something like that. In both cases , the update is not done with Linq :). Your code is O(n m), where n is the length of a and m is the length of b. What should I follow, if two altimeters show different altitudes? You could make it O ( n + m) (assuming only a small number of items from a match each item in b) by using a hash table. You really shouldn't use LINQ to perform side effects. Not the answer you're looking for? this would be used for thing done to each date time as opposed to thing done with each date time That would be slightly different. Can these methods be used with other collections too like, @yellavon these are extension methods on any type that implements. using Linq would be: listOfCompany.Where(c=> c.id == 1).FirstOrDefault().Name = "Whatever Name"; How do I split a list into equally-sized chunks? c# - Set list property value using LINQ ForEach - Stack Overflow { Set operations (C#) | Microsoft Learn Why is it shorter than a normal address? How do I stop the Flickering on Mode 13h? To learn more, see our tips on writing great answers. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Short story about swapping bodies as a job; the person who hires the main character misuses his body. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. If you make your expression return a value, and add something that will fully evaluate the query, such as ToList (), to the end, then it will "work", ie: var list = from something in someList select GetModifiedObject (x); // but change one property private MyType Find centralized, trusted content and collaborate around the technologies you use most. If you make your expression return a value, and add something that will fully evaluate the query, such as ToList(), to the end, then it will "work", ie: That being said, ToList() has some disadvantages - mainly, it's doing a lot of extra work (to create a List) that's not needed, which adds a large cost. This appears to be a response to another answer rather than an answer to the question. I'm using VS 2008. Why did US v. Assange skip the court of appeal? Find centralized, trusted content and collaborate around the technologies you use most. Is there any known 80-bit collision attack? Linq expression to set all values of an array to a given value Use .ToList () in order to convert query in list that you can work with. Asking for help, clarification, or responding to other answers. What positional accuracy (ie, arc seconds) is necessary to view Saturn, Uranus, beyond? If we had a video livestream of a clock being sent to Mars, what would we see? Not the answer you're looking for? Asking for help, clarification, or responding to other answers. You can create a extension method: public static IEnumerable Do(this IEnumerable self, Action action) {
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