C# flatten a list of lists

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WebJan 21, 2024 · 1 2 var result = teachers.SelectMany (x => x.Classes. Select (y => new { description = y.Description, day = y.DayOFWeek, startAt = y.StartTime, endAt = … WebOct 8, 2013 · 11 Answers Sorted by: 32 You can do SelectMany List result = myLocationList.SelectMany (x => x.Children).ToList (); You can use where condition for some selective results like List result = myLocationList.Where (y => y.ParentID == someValue) .SelectMany (x => x.Children).ToList ();

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WebApr 29, 2024 · I have a list of objects, which in turn contain nested lists of further objects. I would like to flatten the object graph into a DataTable.. I found code which takes a collection of objects and maps them to a DataTable (referenced below), but it assumes that properties are simple types that can reliably be converted to a string value.. I am thinking this is only … WebFeb 23, 2012 · If you have an enumerable (or queryable) object that when enumerated returns yet more enumerable objects, such as a list of lists or an array of hash-sets, etc, it selects the elements of those objects. So in this where values is an ICollection> it returns an IEnumerable. – Jon Hanna Feb 23, 2012 … ウォン円 0を

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WebMar 7, 2024 · Replace with your name. Save Program.cs. Type dotnet run in your console window to try it. You've created a list of strings, added three names to that list, … WebIs it possible to use Linq to get a total count of items in a list of lists in C#? More Articles; How to convert from 'string' to 'System.IFormatProvider' in C#; Average value of list in C#; Expression bodied get / set accessors feature in c# 7.0; Device.OnPlatform deprecated; ASP .NET CORE could not find file or assembly with custom assembly At this point I have following select which produces List>, is there a quick and efficient way without looping and creating separate list to flatten the inner lists into one. var legalEntityIds = query.Select (x => x.LegalEntities.Select (y => y.LegalEntityId)).ToList (); c# .net Share Improve this question Follow pakco chillies

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WebJul 26, 2024 · Here the SelectMany call takes a sequence of inputs (the lists which make the values of the dictionary) and projects each single input into another sequence of … WebYes, it is possible to use LINQ to get a total count of items in a list of lists in C#. You can use the SelectMany () method to flatten the list of lists into a single list and then use the Count () method to get the total count of items. In this example, we have a list of lists of integers named "listOfLists". pakco batteryWebDec 3, 2016 · To make this more readable, you can make a simple function: def flatten_list (deep_list: list [list [object]]): return list (chain.from_iterable (deep_list)). The type hinting improves the clarity of what's going on (modern IDEs would interpret this as returning a list [object] type). – Chris Collett Oct 25, 2024 at 14:34 2 ウォン/円チャートリアルタイム

"WebJul 2, 2011 · which is populate using a series of functions that don't really matter in this context, but what I'm looking for is a way to search through ALL of the children items in the list, searching for a particular 'name' value, and if found, returning that List. How is this achieved in the easiest manner, with the least performance hit? " - C# flatten a list of lists

C# flatten a list of lists

WebJun 14, 2024 · I just need to be able to select specific data at various levels of the tree and flatten it out. The nested structure looks like this: TopResult contains -> List each StepResult contains -> List each PropResult contains -> List. I need to flatten out the nested structure and for some reason when I … WebSep 5, 2024 · 5 Answers Sorted by: 4 You can use SelectMany, just concat the single parent and it's children: List newList = masterList.SelectMany (n => new [] { n }.Concat (n.Children)).ToList (); Share Improve this answer Follow answered Sep 5, 2024 at 14:40 Tim Schmelter 444k 72 677 929 Add a comment 4

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WebJul 16, 2009 · List listA = new List { 1, 2, 3, 4, 5, 6 }; List listB = new List { 11, 12, 13, 14, 15, 16 }; List> listOfLists = new List> { … WebMar 14, 2024 · A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.

WebSep 24, 2024 · How to flatten a list using LINQ C - Flattening a list means converting a List to List. For example, let us consider a List which needs to be converted to List.The … WebOct 18, 2024 · Oct 18, 2024 at 10:33. Add a comment. 1. You can use some handy Linq extension methods to get the job done. SelectMany will flatten the lists and select all the items, and Distinct will remove any duplicates: List mergedLists = ListsToMerge.SelectMany (x => x).Distinct ().ToList (); Share. Improve this answer.

WebJan 1, 2013 · 1. You first have to flatten your list of lists into a single list, then group by the date, then sum each group. You didn't show any code, but it should be something along: var result = yourListOfLists.SelectMany (x => x) .GroupBy (x => x.TheDateProperty) .Select (grp => new {key = grp.Key, sum = grp.Sum (e => e.TheNumber)}); Share.

WebMar 23, 2016 · var result = first .Zip (second, (f, s) => new Type [] {a, b}) .SelectMany (x => x); As you can see, we first use Zip to take one element from each of the lists, and combine them into a small array of two …

WebFeb 19, 2024 · List. Part 1 We create a list, and add sub-lists to it. The first List will contain an internal array of List references. Part 2 This method receives a parameter of type … pak choi vegetarian recipesAddresses{ get; set;} } // … ウォン円レートWebSep 14, 2016 · Add a comment -1 That should give you what you need: var flattened = stockItems .Select (x => new { StockName = x.StockName, WarehouseNames = x.Warehouses .Select (y => y.WarehouseName) .ToList () }) .ToList (); It will result in a collection of items that contain StockName and a list of WarehouseName strings. pakcoreWebFeb 25, 2013 · public static List Flatten (Category root) { var flattened = new List {root}; var children = root.Children; if (children != null) { foreach (var child in children) { flattened.AddRange (Flatten (child)); } } return flattened; } Share Improve this answer Follow answered Oct 11, 2010 at 15:35 E.Z. Hart 5,707 1 31 24 pak choi vegan recipesWebApr 12, 2024 · The solution only works on one level, which is what I needed. It could be made recursive to go deeper though: var result = parents.SelectMany (person => person.Children .Prepend (person)) .Select (p => p.Name); Which then allowed me to use all the objects in the flattened lists, including the parent objects. pak colaWebApr 9, 2024 · I want to make a system that will allow me to remove object from a list without shrinking it whenever I call the RemoveItem(). The list of the objects is shrinking whenever I try to remove one element from there. I want that list to stay the same size, so even if the object gets removed the list size stays the same. pakconline.comWebAug 24, 2012 · I need to flatten a parent list and two child lists into one list. How can I do this using c# and linq? Here is my code... public class Customer { public string FirstName { get; set;} public string LastName { get; set;} // need to flatten these lists public List CreditCards { get; set;} public List ウォン円どっちが安い