C# flatten a list of lists

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WebFeb 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; } } 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# LINQ to flatten parent list and two nested children lists and ...

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". WebApr 5, 2024 · Flatten a list - Rosetta Code Task Write a function to flatten the nesting in an arbitrary list of values. Your program should work on the equivalent of this list: [[1], 2, … klayton net worth

Flatten a list of lists in C# Techie Delight

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, … 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 … 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 … recycling enclosure

c# - How to flatten nested objects (LINQ) - Stack Overflow

c# - How to flatten tree via LINQ? - Stack Overflow

WebNov 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 ... 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); recycling empty ink cartridges for charityWebFeb 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 klayton w thorpe facebook

"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 … " - C# flatten a list of lists

C# flatten a list of lists

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< 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?

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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 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 …

Addresses{ get; set;} } // … 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

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. 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

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 …

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. recycling empty pill containersWebMay 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 … recycling enhancement actWebJan 27, 2012 · So, for example, to use it to get a list of every control on an ASP.NET page, you would call the following: List allControls = Page.Controls.Flatten (c => … recycling englandWeb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： klayton thorn rugbyWebAug 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 recycling energyWebFlatten 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 … klayton scandroidWebSep 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 recycling enforcement