2024 C# flatten a list of lists

C# flatten a list of lists

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WebAug 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 … 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 …

c# - Flattening a list of lists, using LINQ, to get a list of parent ...

WebDec 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 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, … lake stevens post office wa

Linq: How to flatten a nested list – Developers Log

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? WebFeb 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); 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 lake stevens police non emergency number

Flatten List in Linq - ITCodar

WebMay 24, 2024 · The issue with using a List as a DataSource to the grid is that the grid will not display properties of myClass that are collections. Like the Telephone and Emails lists. It will display a Class, however, it will default and use the classes ToString method and display that into a "single" column.. In your example, using the Contacts … WebDec 11, 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. hello world hour codeWebFeb 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; } } hello world how are you doing today

"WebFeb 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 " - C# flatten a list of lists

C# flatten a list of lists

How to avoid shrinking list when an element is removed in C#?

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 WebFlatten a list which one of its properties is another list of object You should use SelectMany to flatten a sequence of Main objects: Projects each element of a sequence to an …

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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 … 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.

Web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： 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.

WebHere 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 outputs - in this case … 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

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.

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 (); lake stevens police department public recordsWebThis 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 … hello world how do apples grow jill mcdonaldWebSep 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 … lake stevens parks and recreationAddresses{ get; set;} } // … hello world how are you i\u0027m fineWebJan 21, 2024 · 1 2 var result = teachers.SelectMany (x => x.Classes. Select (y => new { description = y.Description, day = y.DayOFWeek, startAt = y.StartTime, endAt = … lake stevens sewer district staff directoryWebMar 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. lake stevens property searchWebJul 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 … helloworld.html file