C# order by random

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August undefined, 2024

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 (); WebMay 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.

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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 WebFeb 25, 2016 · Order by Random in C#. #linq. #c#. AnyEnumerable.OrderBy(_ => Guid.NewGuid()) #linq. #c#. Written by Chad Moran. Say Thanks. Respond Related … jasper engines \u0026 transmissions leavenworth in

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WebOct 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 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. 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 … lowleys ripon

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Web评审专家随机抽取系统的设计与实现.docx 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. jasper error loading object from inputstreamWebApr 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. low lh fsh

"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(); " - C# order by random

C# order by random

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 …

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WebMar 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, … 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.

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 … WebJul 20, 2024 · Generate a random number that falls between the timestamps of those documents. Add the random number to the minimum value and find the first document that is greater than or equal to that value. This uses "padding" from the timestamp value in "hex" to form a valid ObjectId value since that is what we are looking for.

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 … 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

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 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 (); jasper ethiopia business groupWebOct 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 … jasper engines tech supportWebMar 3, 2013 · OleDb ORDER BY RND () is not Work (C#) Hello and Thank you for helping. I'm using the following code in my Data set Data Table Query (by Wizard) for sorting by random (ID Column). SELECT ID, Q, A_1, A_2, A_3, A_4, Correct FROM Quiz ORDER BY RND (Quiz.ID) When I test this code in Query-builder (in C#) Work Correctly but When … jasper environment canada weatherWebDec 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 … jasper european brushed oak collectionWebThis post will discuss how to randomize a List in C#. 1. Using Enumerable.OrderBy Method. The Enumerable.OrderBy method sorts the elements of a sequence using the specified comparer. We can tweak it as follows to shuffle items in random order by using a random number generator. Note that this creates a shuffled copy of the source list and ... low lh and fsh menWebYou use the derived-table to "find" the primary-key of a single random row. Then you join on it..to get the entire-row. Select * from my_thing mainTable JOIN ( Select my_thing_key from my_thing order by RAND () LIMIT 1 ) derived1 on mainTable.my_thing_key = derived1.my_thing_key; Using RAND () is slower. lowlf stock price todayWebLINQ (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 jasper engine warranty claims