2024 C# order by random

C# order by random

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Web评审专家随机抽取系统的设计与实现.docx WebSep 15, 2024 · C# string[] words = { "the", "quick", "brown", "fox", "jumps" }; IEnumerable query = from word in words orderby word.Substring (0, 1) descending select word; foreach (string str in query) Console.WriteLine (str); /* This code produces the following output: the quick jumps fox brown */ Secondary Sort Examples Secondary …

c# - linq: order by random - Stack Overflow

WebSep 29, 2024 · Random rand = new Random(42); query.ToArray().OrderBy(o => rand.Next()).ToList() You just need to then save the 42 to the database. The next time you run this the results are the same (so long as query returns the same results in the same order). The .ToArray() brings the results into memory so that you can call rand.Next() to … WebKnown Programming languages: Java, Python, C/C++, C#, JavaScript. Machine Learning Algorithms: Have worked with knn, random forest, logistic regression algorithms through Python's sklearn library ... county line nissan north torrington

c# - How to Sort DataTable.Select() randomly - Stack Overflow

WebFeb 25, 2016 · Order by Random in C#. #linq. #c#. AnyEnumerable.OrderBy(_ => Guid.NewGuid()) #linq. #c#. Written by Chad Moran. Say Thanks. Respond Related … WebFeb 17, 2010 · You need put "order by RANDOM ()" on your query. Example: select * from quest order by RANDOM (); Let's see an complete example Create a table: CREATE TABLE quest ( id INTEGER PRIMARY KEY AUTOINCREMENT, quest TEXT NOT NULL, resp_id INTEGER NOT NULL ); Inserting some values: WebFeb 14, 2014 · 2 Answers Sorted by: 7 var rand = new Random (); var result = dt.AsEnumerable ().OrderBy (r => rand.Next ()); Share Improve this answer Follow answered Jun 25, 2011 at 11:18 Magnus 44.7k 8 82 118 Yes, this is the way to do it. Sorting on NEWID () in T-SQL to return rows in random order is a hack, albeit a useful one. county line nissan used cars

c# - linq: order by random - Stack Overflow

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WebFull stack expert in C# and .Net Core. Optimising for simplicity and performance with a rightsized architecture. Experience includes building fast, robust and flexible p&l, return, risk and VaR engines with risk factor, fund of fund and benchmark attribution. Plus systems that derive from this kind of engine like order management and portfolio … WebMay 29, 2011 · If you want to randomly re-order in place you should shuffle the list, usage with an extension method is then a simple one-liner. This assumes you already have an IList based collection. Usage: myList.Shuffle (); brewton heights shopping centerWebOct 18, 2024 · queryRef = postsRef.whereField ("random", isLessThanOrEqualTo: random) .order (by: "random", descending: true) .limit (to: 1) queryRef = postsRef.whereField ("random", isGreaterThanOrEqualTo: random) .order (by: "random") .limit (to: 1) Selecting multiple random documents Often, you'll want to select more than … county line nissan service

"WebRun command prompt commands in C# application; Run a Python script in C#; C# Method; Return multiple values from method; Pass method as parameter in another method; Find the caller method name; Get all types that implement an interface; C# Number; Format number with commas as thousands separators; Display a number to 2 decimal places; C# String " - C# order by random

C# order by random

How can I get a random record from MongoDB? - Stack Overflow

WebDec 7, 2024 · var randomOrder = numbers.Shuffle (); var results1 = randomOrder.ToArray (); var results2 = randomOrder.ToArray (); Here the returned enumerator is called multiple times and each time it orders the items again. Given that the ordering is random results1 will produce a different ordering then results2. WebJul 4, 2011 · Sorted by: 7 IEnumerable ints; var random = new Random (); var shuffled = ints.OrderBy (i => random.Next ()).ToList (); The ToList is only there to ensure that the same (random) order is returned when iterating over shuffled more than once. Of course you can shuffle 'inplace' if you don't need the original anymore

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WebLINQ (Language Integrated Query) is a one of very useful feature of .net 3.5 framework. This allows you to query objects and perform complex operations simply and efficiently. There are lots of trick which can be used with the help of LINQ. In this article I am explaining how can we random sort a List using LINQ. Random Sort

WebMar 15, 2024 · Simplest way to "Shuffle" is just to order by random guid, I actually did this for a job code interview. Code (CSharp): // Say we have listOfThings filled with things. var listOfThings = new List () { "1", "2", "3", "4" }; // Randomly Order it by Guid.. listOfThings = listOfThings.OrderBy( i => Guid.NewGuid()).ToList(); WebAug 21, 2015 · public long GetRandomItem () { var allItems = _db.AllItems .Where (x => x.CanBeFound == true) .OrderByDescending (x => x.Rarity) .Select (x => new { x.Id, // id of item x.Rarity, // rarity between 1 and 100 }).ToList (); int totalRarity = allItems.Sum (x => x.Rarity); var random = new Random (DateTime.Now.Millisecond); var randomNumber …

WebSep 14, 2014 · There is no way to do this without an ordering clause. personToCall = db.Persons.OrderBy (r => Random.Next ()).First (); That could be slow depending on the size of your Persons table, so if you wanted to make this fast, you'd have to add a column to Person, or join it to a dictionary of random numbers and Person keys, then order by that. WebIt looks like OrderBy assumes the ranking function to be stable, which is not the case with a random generator. Linq to entities translate this to a sql query which may get different ranking for the same entity (as soon as your queries use Include ). Then it causes the entity to get duplicated in the result list. – Frédéric Jul 6, 2015 at 9:51 1

WebDec 7, 2024 · The order is completely determined by the randomness of the values generated. But do note that we generally assume consistent ordering so the order that …

WebDec 27, 2016 · Then just order by ctx.Random (); this will do a random ordering at the SQL-Server courtesy of NEWID (). i.e. var cust = (from row in ctx.Customers where row.IsActive // your filter orderby ctx.Random () select row).FirstOrDefault (); county line nissan watertownWebDownload file in Asp.Net. How to randomize a list in C#. How to shuffle a List in C#. 1. Simply use OrderBywith Random.next()method to shuffle items in a completely random … brewton gun storesWebMay 13, 2024 · Sorted by: 2 Let's take these two lines of code: Random num = new Random (); // (1) string rand = new string ( // (2) this.word [number] // (3) .OrderBy (s => (num.Next (2) % 2) == 0) // (4) .ToArray ()); // (5) And disect them. (1) Creates a new instance of the Random class, which generates (pseudo-)random numbers. county line nissan service departmentWebApr 7, 2024 · Innovation Insider Newsletter. Catch up on the latest tech innovations that are changing the world, including IoT, 5G, the latest about phones, security, smart cities, AI, robotics, and more. brewton homes for saleWeb關於. Reliability Engineering Department Industrial Engineer，WIN Semiconductors Corp. Manage MES development project, Hi-Rel Laboratory Management and several side projects such as productivity analysis and improvement projects : Evaluate cost-effectiveness of MES project's items, build-up roadmap and timeline in a holistic view and ... county line nursery baxley gaWebOct 7, 2024 · You can assign the result of the orderbydescending to a object and compare the list order with the db.Announcements using Visual Studio debugger. var orderedlist = db.Announcements.OrderByDescending(a => a.DateCreated).ToListAsync(); And please check if you have changed the order of the list in your view page. Best Regards, Jean county line nursery byronWebMar 7, 2013 · In any event your comparator needs to provide a total ordering (it doesn't). You could fix it by selecting a new GUID (once) for each element, then sorting by that, … county line nursery bangor mi