C# list remove foreach
Weba foreach (item in list) construct allows you to use break or continue if you need to exit the iteration or the loop. But you cannot alter the list inside a foreach loop. I'm surprised to see that list.ForEach is slightly faster. But that's probably not a valid reason to use it throughout , that would be premature optimisation. WebOn large-ish collection ToList is deadly. As xanatos said, this is a misuse of ForEach. If you are going to use linq to handle this, I would do it like this: var departments = employees.SelectMany (x => x.Departments); foreach (var item in departments) { item.SomeProperty = null; } collection.AddRange (departments);
C# list remove foreach
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Webvar nameList = new List(); foreach (user in users) {nameList.Add(user.Name);} return nameList; With a LINQ query, you can extremely shorten the required code to this: return users.Select(u => u.Name).ToList(); Once you understand and can utilize LINQ queries, I guarantee you, that your code will gain much more readability. WebMay 9, 2024 · You don't need an index, as the List class allows you to remove items by value rather than index by using the Remove function. foreach (car item in list1) list2.Remove (item); Share Improve this answer Follow answered Apr 30, 2010 at 15:15 Adam Robinson 181k 35 285 342 5
WebApr 22, 2024 · 3. You can use Remove () method if you already have a reference to the string array that you want to remove like the following: List theList = new List (); string [] myStringarray = new string [] { "a", "b", "c" }; theList.Add (myStringarray); //remove myStringarray from the main list theList.Remove …
WebOct 19, 2024 · C#でListの内の要素をforeach中に削除する C# .NET Core .NET Framework 結論から言うと、 foreachの中でリストの要素を削除するのは無理 です。 諦めましょ … WebYou can only remove something you have a reference to. So you will have to search the entire list: stuff r; foreach (stuff s in prods) { if (s.ID == 1) { r = s; break; } } prods.Remove (r); or for (int i = 0; i < prods.Length; i++) { if (prods [i].ID == 1) { prods.RemoveAt (i); break; } } Share Improve this answer Follow
WebExample 1 – C# List.ForEach () List.ForEach () function accepts an Action and executes for each element in the list. In the following program, we have a list with three numbers. We shall execute a delegate function, which gets the list element as argument, and executes the set of statements in its body, for the list element.
WebJun 20, 2024 · 1) You can use a for/next loop instead a for/each. 2) You can iterate through a separate list: List custList = Customer.Populate (); foreach (var cust in custList.ToList ()) { custList.Remove (cust); } Notice the ToList on the list variable. luto e fenomenologiaWebApr 14, 2024 · Method 2: Using Split () and Distinct () Another way to remove duplicate words from a string in C# is to use the Split () method to split the string into an array of words, then use the Distinct () method to remove duplicates, and finally join the array back into a string. Here's an example: string input = "C# Corner is a popular online ... luto e logoterapiaWeb我有一個 class 和一個 IEnumerable adsbygoogle window.adsbygoogle .push 刪除重復值,但我仍然在此處顯示的項目源中得到重復項: 我怎樣才能讓它只顯示每個承運人的到達時間之一 luto e melancolia 1917 pdfWebApr 11, 2024 · The foreach statement: enumerates the elements of a collection and executes its body for each element of the collection. The do statement: conditionally executes its body one or more times. The while statement: conditionally executes its body zero or more times. At any point within the body of an iteration statement, you can break … luto e melancolia anoWebSep 18, 2013 · foreach: foreach (var money in myMoney) { Console.WriteLine ("Amount is {0} and type is {1}", money.amount, money.type); } MSDN Link Alternatively, because it is a List .. which implements an indexer method [], you can use a normal for loop as well.. although its less readble (IMO): luto e melancolia 1917WebApr 14, 2024 · Method 2: Using Split () and Distinct () Another way to remove duplicate words from a string in C# is to use the Split () method to split the string into an array of … luto e melancolia artigoWebApr 17, 2009 · This is very simple: foreach (var item in Enumerable) { item = item.AddRange (item.Enumerable)); } As a more general example, let's say we want to iterate a collection and remove items where a certain condition is true. Avoiding foreach, using LINQ: myCollection = myCollection.Where (item => item.ShouldBeKept); luto e melancolia freud livro