WebApr 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: 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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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 } WebFeb 14, 2024 · You can use the Zip method to create one list of the two: var lst = new List () { "a", "b" }; var obj = new List () { 1, 2 }; var result = lst.Zip (obj, (x, y) => new Tuple (x, y)) .ToList (); Share Follow answered Feb 14, 2024 at 12:30 Markus 20.6k 4 30 53 This will merge two list. Is it OP's expected behavior?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 …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() {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 11:18WebFeb 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 …WebYou can add items to a List by using the Add or AddRange methods. The List class uses both an equality comparer and an ordering comparer. Methods such as Contains, IndexOf, LastIndexOf, and Remove use an equality comparer for the list elements. The …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 …WebApr 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: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.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 …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.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 …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 …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 …
WebMar 20, 2009 · And to create a track list as a List you simply do this: var trackList = new List (); Adding tracks can be as simple as this: trackList.add ( new Track { TrackID = 1234, Name = "I'm Gonna Be (500 Miles)", Artist = "The Proclaimers", Album = "Finest", PlayCount = 10, SkipCount = 1 }); WebSep 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
WebApr 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 … 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 ...
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 …
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 … theatre tickets norfolkWebApr 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 … theatre tickets mousetrapWebApr 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 (); theatre tickets new york cityWebOct 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 … theatre tickets nhsWebYou can add items to a List by using the Add or AddRange methods. The List class uses both an equality comparer and an ordering comparer. Methods such as Contains, IndexOf, LastIndexOf, and Remove use an equality comparer for the list elements. The … the grasshopper moorhouse westerhamWebBecause 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. the grasshopper mythWebDec 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 … theatre tickets new york broadway