2024 Create new list from two lists c#

Create new list from two lists c#

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WebList listA = new List { "string", "string" }; List listB = new List { "string", "string" }; for (int i = 0; i < listA.Count; i++) listB [i] = listA [i]; But with a foreach =) c# Share Improve this question Follow edited Aug 29, 2013 at 8:52 Daniel Daranas 22.4k 9 63 114 asked Dec 23, 2009 at 22:53 Hugo WebNov 4, 2015 · Order both lists by elements ids. Create a for loop, that iterates through both of them keeping current index to the element with same id for both lists. Move index to the next smallest id found in both list, if one has it only, move only this on. O (n log n) + O (m log m) + O (n); Share Improve this answer Follow edited Nov 4, 2015 at 11:18

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WebJun 29, 2011 · using System; using System.Linq; using System.Collections.Generic; public class Program { public static void Main () { List list1 = new List {1, 2, 3, 4, 5, 6 }; List list2 = new List {1, 2, 3 }; List list3 = new List {1, 2 }; var lists = new IEnumerable [] {list1, list2, list3 }; var commons = GetCommonItems (lists); Console.WriteLine ("Common … WebAug 12, 2013 · I want to get a list of A objects that meet 2 conditions. -All of A objects must match their A.Code atribute to any of B.Code atribute in the B List. -B.Name must be = "yoda"; I tried with this code (and another exampeles) but it doesent seem to work and i dont know why. I am just starting with linQ. blaine county idaho board of commissioners

c# - Using Linq to group a list of objects into a new grouped list …

Web2 Answers Sorted by: 9 You could use something like: var query = list1.Concat (list2) .GroupBy (x => x.id) .Select (g => g.OrderByDescending (x => x.quantity).First ()) .ToList (); It's not nice, but it would work. (This approach avoids creating a new instance of … WebApr 2, 2024 · 1.1m. 0. 10. To create a List in C#, you can use the List class, where T is the type of item you want to store in the list. Here's an example of how to create a List of integers: List numbers = new List(); This creates an empty List of integers … WebJul 20, 2014 · How can I create a list with a fixed set of entries. Learning C# and doing an exercise to list all cards in a deck of cards(without jokers). Going to use two foreach ... blaine county hit and run

c# - Creating new list from two lists that contains only distinct …

c# - Compare 2 Lists with a foreach Loop and create new List from items ...

WebIf you need new list (and include the duplicate), you can use Concat var listB = new List {3, 4, 5}; var listA = new List {1, 2, 3, 4, 5}; var listFinal = listA.Concat … WebBecause returning a List in select creates a Lists inside a list which is not the desired output here. For those who have problems I can suggest : var groupedCustomerList = userList.GroupBy (u => u.GroupID).Select (grp => grp.First ()).ToList (); – aliassce Feb 8, 2024 at 21:28 Show 4 more comments 44 Your group statement will group by group ID. blaine county idaho recorder of deedsWebApr 2, 2024 · To create a List in C#, you can use the List class, where T is the type of item you want to store in the list. Here's an example of how to create a List of integers: List numbers = new List(); This creates an empty List of integers named numbers. To add items to the list, you can use the Add method: blaine county farm service agency

"WebFeb 21, 2016 · var c = from i in Enumerable.Range (0, a.Count) from j in Enumerable.Range (0, b.Count) where a [i] == b [j] select a [i]; var cList = c.ToList (); But it's much nicer to do: var c = from aItem in a join bItem in b on aItem equals bItem select aItem; var cList = c.ToList (); But this doesn't filter duplicates. " - Create new list from two lists c#

Create new list from two lists c#

How To Create A List In C#? - c-sharpcorner.com

Web6 Answers Sorted by: 2 The easiest way would be using LinQ. The Except methods returns all items from the source which not exists in the second list. holidayDifference = remoteHolidays.Except (localHolidays).ToList (); The Except method accepts a optional second parameter to customize the comparison. Web81 1 1. Add a comment. 7. This is how you initialize and also you can use List.Add () in case you want to make it more dynamic. List optionList = new List {"AdditionalCardPersonAdressType"}; optionList.Add ("AutomaticRaiseCreditLimit"); optionList.Add ("CardDeliveryTimeWeekDay");

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WebOct 29, 2024 · Sample list: var list1 = new List(); -Is there an easy way to create multiple copies of a list in a efficient way. var list2 = list1.ToList(); -Is there a way to clear a list then re-populate it with the original list eliminating the need to create a lot of unique … WebApr 2, 2024 · We can use the collection's index to retrieve an item in a C# List at a specific position. For example, the following code snippet reads the 3rd item in the List. Console.WriteLine(authors[2]); C# List properties. List class properties include the following: Capacity – Number of elements List can contain. The default capacity of a …

WebCreate a List . To create List in C#, we need to use the System.Collections.Generic namespace. Here is how we can create List.For example, using System; using System.Collections.Generic; class Program { public static void Main() { WebSep 6, 2012 · If they are distinct anyway, you could also use a HashSet. HashSet set1 = new HashSet (list1); HashSet set2 = new HashSet (list2); set1.IntersectWith (set2); Modifies the current HashSet object to contain only elements that are present in that object and in the specified collection.

WebIn the above example, List primeNumbers = new List(); creates a list of int type. In the same way, cities and bigCities are string type list. You can then add elements in a list using the Add() method or the collection-initializer syntax.. You can also add elements of … WebJun 24, 2024 · 3. The simplest solution I can think of. var interleavingMergedLists = list1 .Zip (list2, (lhs, rhs) => new [] {lhs, rhs}) .SelectMany (l => l) .ToList (); Rather than creating a new anonymous object / ValueTuple instead create an array. Then you can flatten that …

WebNov 27, 2012 · You can use LINQ to join these two collections on this ID, producing for example a tuple of bus and its driver. Using LINQ syntax, it would look like this: var result = from bus in buses join driver in drivers on bus.busID equals driver.busID select new { Bus = bus, Driver = driver }

WebDec 19, 2010 · listsOfProducts contains few lists filled with objects. List productListMerged = new List (); listsOfProducts.ForEach (q => q.ForEach (e => productListMerged.Add (e))); If you have an empty list and you want to merge it with a … blaine county idaho county commissionersWebFeb 12, 2024 · In order to get only the items common to both lists, you can use the System.Linq extension method Enumerable.Intersect, which returns the intersection of two lists: var intersection = firstList_names.Intersect (secondList_names); There is some confusion on your question, however. If you want all the items from both lists (without … fps games without sbmmWebApr 7, 2024 · This can easily be done by using the Linq extension method Union. For example: var mergedList = list1.Union (list2).ToList (); This will return a List in which the two lists are merged and doubles are removed. If you don't specify a comparer in the Union extension method like in my example, it will use the default Equals and GetHashCode … fps games with controller support pcWebAug 19, 2016 · You can create helper generic, static method to create list: internal static class List { public static List Of (params T [] args) { return new List (args); } } And then usage is very compact: List.Of ("test1", "test2", "test3") Share Improve this answer Follow answered Jul 15, 2014 at 14:39 Konrad Kokosa 16.5k 2 36 58 blaine county historical museum hailey idahoWebApr 7, 2024 · OpenAI also runs ChatGPT Plus, a $20 per month tier that gives subscribers priority access in individual instances, faster response times and the chance to use new features and improvements first. fps games web gamesWebSep 19, 2014 · 3 Answers Sorted by: 4 You can use the linq, except and where var a = new List { "a", "b", "c" }; var b = new List { "c", "d", "e" }; var temp = a.Intersect (b).ToList (); b = b.Except (a).ToList (); a = temp; Output: a: "c" b: "d", "e" Note: It is probably more efficient to do this without linq fps games with best storyWebApr 29, 2024 · 4 Answers Sorted by: 2 You can use Join method and return a result as list of named tuples List< (int, string)> (available beginning with C# 7), becuase List isn't a valid C# declaration. var output = objAs.Join (objBs, a => a.ObjBId, b => b.Id, (a, b) => (a.Id, b.Title)).ToList (); blaine county idaho recorder