C# list exists any

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WebApr 2, 2013 · c# - Find items from a list which exist in another list - Stack Overflow Find items from a list which exist in another list Ask Question Asked 10 years ago Modified 2 years, 7 months ago Viewed 93k times 53 I have a List PropA { int a; int b; } and another List PropX { int a; int b; } WebJan 31, 2024 · I am trying to prevent adding an item in the list that already exist in C#. The code below loops through datatable rows. As you can see rows is of the type List datatables rows does contain duplicates. I need check if the rowName in the datatable is already in rows object of type List. …

C# List Exists Method

WebFeb 7, 2007 · I have a list of integers and simply want to check if a number exists in that list. In the manual I found the List.Exists method but this apparently only works for … WebOct 5, 2009 · If you're using .NET 3.5, it's easy: public class ListHelper { public static bool ContainsAllItems (List a, List b) { return !b.Except (a).Any (); } } This checks whether there are any elements in b which aren't in a - and then inverts the result. Note that it would be slightly more conventional to make the method generic rather than ... mabank athletic booster club

C# LINQ: How to use Any(), All() and Contains() - Eamon …

WebJul 1, 2009 · 9 Answers Sorted by: 558 LINQ defines an extension method that is perfect for solving this exact problem: using System.Linq; ... bool has = list.Any (cus => cus.FirstName == "John"); make sure you reference System.Core.dll, that's where LINQ lives. Share Improve this answer Follow edited Nov 25, 2012 at 18:22 answered Jul 1, 2009 at 19:59 WebThe List class is used infrequently in F# code. Instead, Lists, which are immutable, singly-linked lists, are typically preferred. An F# List provides an ordered, immutable series of values, and is supported for use in functional-style development. WebJul 14, 2011 · Jul 14, 2011 at 16:03 2 Well in LINQ to Entities, Exists () is not often not even available (on ObjectSet<>, IQueryable<>, etc.) Your only choice is Any (). Exists () will only be available if you first use ToList () in your LINQ queries. – Ross Jul 14, 2011 at 16:07 Add a comment 1 Answer Sorted by: 4 kitchenaid 7cup food processor kfp715wh

c# - Case-Insensitive List Search - Stack Overflow

WebExists (element => element < 7); Console.WriteLine (exists); } } Output True False. The example for Exists above tests first to see if any element in the List exists that has a value greater than 10, which returns true. … WebNov 14, 2016 · List msgList = new List (); msgList.Add ("This sentence contains the word Apple."); msgList.Add ("This doesn't contain any fruits."); msgList.Add ("This does. It's a banana."); Now I want to find out which items in msgList contains a fruit. For which, I use the following code: mabank chamber of commerceThe following code example demonstrates how to use Any to determine whether a sequence contains any elements. C# List numbers = new List { 1, 2 }; bool hasElements = numbers.Any (); Console.WriteLine ("The list {0} empty.", hasElements ? "is not" : "is"); // This code produces the following … See more mabank church of christ

"WebJun 20, 2024 · A list can be resized dynamically but arrays cannot. List class can accept null as a valid value for reference types and it also allows duplicate elements. If the Count becomes equals to Capacity then the capacity of the List increases automatically by reallocating the internal array. " - C# list exists any

C# list exists any

List .Exists(Predicate ) Method (System.Collections.Generic

WebAlso seems silly to be passing lists around... private bool Exists (List lList, string sCompare) { bool bVal = false; foreach (string s in lList) { if (s == sCompare) { bVal = true; } break; } return bVal; } c# list contains exists Share Improve this question Follow asked Mar 6, 2016 at 20:15 Andy Stagg 353 5 22 WebOct 13, 2010 · As long as your list is initialized with values and that value actually exists in the list, then Contains should return true. I tried the following: var list = new List {1,2,3,4,5}; var intVar = 4; var exists = list.Contains (intVar); And exists is indeed set to true. Share Follow answered Oct 13, 2010 at 13:40 Rune Grimstad 35.4k 10 62 76

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WebOct 16, 2010 · I have a list testList that contains a bunch of strings. I would like to add a new string into the testList only if it doesn't already exist in the list. Therefore, I need to do a case-insensitive search of the list and make it efficient. I can't use Contains because that doesn't take into account the casing. I also don't want to use ToUpper/ToLower for … WebMay 21, 2024 · The Any() method can also be used to quickly check if a collection has elements within it. var listIsNotEmpty = countries.Any(); …

WebSep 12, 2013 · LINQ provides you with capabilities to "query" any collection of data. You can use syntax like a database query (select, where, etc) on a collection (here the collection (list) of strings). so you are doing like "get me items from the list Where it satisfies a given condition" inside the Where you are using a "lambda expression" WebYou can use the Any method with a predicate to check if a string contains any strings from a list in Entity Framework. Here's an example: csharpvar myList = new List { "foo", "bar", "baz" }; var result = db.MyTable .Where(x => myList.Any(y => x.MyField.Contains (y))) .ToList(); In this example, myList contains a list of strings that we ...

WebYou can check if a list is inside of another list with this var list1 = new List { 1, 2, 3, 4, 6 }; var list2 = new List { 2, 3 }; bool a = list1.Any (c => list2.Contains (c)); Share Improve this answer Follow edited Mar 22, 2024 at 19:18 Abra 18.6k 6 32 41 answered Mar 22, 2024 at 19:05 Pperez 61 1 2 Add a comment 0 WebList.Exists (Object method) Determines whether the List (T) contains elements that match the conditions defined by the specified predicate. IEnumerable.Any …

WebAug 29, 2013 · The first approach uses a loop: bool isFound = false; foreach (item1 in list1) { if (list2.Contains (item1)) { isFound = true; break; } } The second one uses Linq directly: bool isFound = list1.Intersect (list2).Any (); The first one is long to write and not very straightforward/easy-to-read.

WebC# program that uses Exists method on List using System; using System.Collections.Generic; class Program { static void Main () { List list = new List (); list.Add (7); list.Add (11); list.Add (13); // See if … kitchenaid 7 cup food processor wattage kitchenaid 7-cup food processor reviewWebThe Exists method returns false because all such elements have been removed. Note In C# and Visual Basic, it is not necessary to create the Predicate delegate ( Predicate … mabank car rentalsWebC# public bool Contains (T item); Parameters item T The object to locate in the List. The value can be null for reference types. Returns Boolean true if item is found in the List; otherwise, false. Implements Contains (T) Examples mabank city facebookWebFeb 14, 2014 · 3 Answers Sorted by: 12 if (list.Any ()) { // found something! } else { // found nothing } I always use Any () simply because it's the most performant. List.Count () goes through each item and counts them, but you don't care about the number of items -- you only care if there's an item at all. kitchenaid 7 cup food processor silverWebJun 22, 2024 · How to check if an item exists in a C# list collection? Csharp Programming Server Side Programming Set a list − List < string > list1 = new List < … kitchenaid 7-cup food processor redWebList test3 = test1.Where (w => !test2.Contains (w)).ToList (); The query above works on an exact match but not partial matches. I have looked at other queries but I can find a close comparison to this with Linq. Any ideas or anywhere you can point me to would be a great help. c# linq Share Improve this question Follow kitchenaid 7 cup food processor walmart