C# flatten a list of lists

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WebApr 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. 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 …

[Solved] Flatten a C# Dictionary of Lists with Linq 9to5Answer

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 … WebThis post will discuss how to flatten a List in C#. We can use LINQ to flatten a list of lists. The List.SelectMany() method applies the specified transform function to each source … lowest twitch setting

c# - Generic Method to Flatten a Collection of Nested Objects …

WebApr 10, 2024 · This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers. 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 … 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. lowest two tax brackets 2015

C# LINQ how to flatten parent list and two nested children lists …

Insert Data into MySQL in multiple Tables in C# efficiently

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 (); january meteor shower 2017WebMar 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, … january meteor shower

"WebApr 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. " - C# flatten a list of lists

C# flatten a list of lists

c# - How to flatten list of lists? - Stack Overflow

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. 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

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WebIn this case you have a list of lists to start, so if you want to concatenate them the function to map from a TSource (which is an IEnumerable of TResults) to an IEnumerable of TResults is the identity function (x => x). 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?

WebAug 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 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.

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 … WebNov 20, 2009 · I have Items from a certain source (populated from somewhere else): public class ItemsFromSource{ public ItemsFromSource(string name){ this.SourceName = name; Items = new List<

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 …

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 … january meteor shower 2022WebNov 9, 2012 · int TownId, int CompanyId, int [] Products, int [] Prices. So I can do. flatList.GroupBy (l => new { l.TownId, l.CompanyId }) To get a list of groups, which has all the products and prices for each town/company pair. Now, for each key in this lookup, I want to flatten/merge all the values. Seems like I should be able to use SelectMany, but I ... lowest tv serviceWebFeb 28, 2024 · Using Linq what will be the best way of making a flattened list with these 2 objects lists. public class DataDto { public string StudentID { get; set; } public List Scores { get; set; } } public class ScoreDto { public string ExamID { get; set; } public double Mark { get; set; } } lowest two point thresholdWeb有什么理由使用Aggregate而不是更簡單的string.Join嗎？. string joined = string.Join(", ", myCollection.Select(x => "'" + x + "'")); （如果使用的是.NET 3.5，請添加ToArray調用。. 您可以使用Aggregate （理想情況下使用StringBuilder ）實現string.Join但這並不令人愉快。假設一個非空集合，我認為應該這樣做： january mexicanWebAug 6, 2012 · 165. You can flatten a tree like this: IEnumerable Flatten (IEnumerable e) => e.SelectMany (c => Flatten (c.Elements)).Concat (new [] { e }); You can then filter by group using Where (...). To earn some "points for style", convert Flatten to an extension function in a static class. public static IEnumerable … january mexico vacation dealsWebFeb 10, 2024 · I would like to extract the strings from the list above, not allowing the lists containing the strings to have more than one item. That is, I need to have the following result: { "Apple", "Banana" } So far I have been trying the following: var result = fruits .Where (x => x != null) .Select (x => x.SingleOrDefault ()) .Where (x => x != null); lowest tv resolutionWebYes, 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". january military observances