2024 C# return index of object in a list

C# return index of object in a list

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August undefined, 2024

WebJun 17, 2024 · Based on your description, you want to return a list from a classlibrary. You could try the following code. public List getlist(string name) { List list = new List(); if(name== "Lights") { list = SupportedDeviceTypes; return list; } else { return list; } } I used console app to test it.

How do I get the index of an object from a LINQ query in …

WebRemarks. The Predicate is a delegate to a method that returns true if the object passed to it matches the conditions defined in the delegate. The elements of the current List are individually passed to the Predicate delegate, moving forward in the List, starting with the first element and ending with the last element. WebDec 7, 2024 · In basic words, I want to find that my number (75), is "inside" the range between 60 and 80, so it returns to me index number 1. So far, I've used Linq but it only … flatfoot 56 christian

C# return index of a object in a List - soltveit.org

WebFeb 1, 2024 · Parameter: index: It is the zero-based index of the element to get or set of type System.Int32. Return Value: This property returns the element at the specified index. Exception: This method will give ArgumentOutOfRangeException if the index is less than 0 or index is equal to or greater than Count. WebJun 11, 2024 · IndexOf () uses the default EqualityComparer, so if you overload equality for your items you can control this. Otherwise you can use First () or Single () (from LINQ) … WebAn indexer allows an object to be indexed such as an array. When you define an indexer for a class, this class behaves similar to a virtual array. You can then access the instance of this class using the array access operator ([ ]). Syntax. A one dimensional indexer has the following syntax −. element-type this[int index] { // The get accessor. check my lowes order

return a list of objects in c# - Stack Overflow

c# - How can I get the index of an item in a list in a single …

WebJul 5, 2014 · i need to build a list in a function, then return it to a another list variable the problem is: inside the function the list is built properly but when i return it to the outer variable it seems like all the elements of the outer list are all similar to the last one added to it inside the function. what is the reason of this? this is my code: WebJun 14, 2024 · Well, lets look at how we can use C# return index of a object in a List. Create a simple Address Class. We will use a simple Address class to demostrate how … check my lowes gift card balance onlineWebThis post will discuss how to find the index of an element in a list in C#. The solution should either return the index of the first occurrence of the required element or -1 if it is not … check my lowes online order

"WebJan 1, 2009 · var items = from x in myListBox.Items where otherListOfMyObjects.Any (y => y == x /*SEE NOTE*/) select x; foreach (item i in items) myListBox.SelectedItems.Add (i); … " - C# return index of object in a list

C# return index of object in a list

c# - How Can I Get the Index of An Item in a ListBox?

WebList is a generic and therefore requires a specification of type. You are missing this in the return portion of your method signatur, this part: public List findNeighbours() You need to specify the type like you did in the method. That way the method knows what its returning specifically. public List findNeighbours() WebMar 18, 2010 · Just commenting for future searchers that C#6 will allow myCars.Select((car, index) => new {car, index}).FirstOrDefault(myCondition)?.index; to return a null index when handling cases where there are no results after myCondition is applied. –

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http://www.javashuo.com/article/p-htdapkvn-pb.html WebApr 19, 2024 · Generally speaking, you're going to need a concrete type to make this work, like a Person object or an int value.. The reason this is the case is because your type must implement an .Equals() method. It won't work with object objects, because the .Equals method for object compares references, not values, and your comparison will always …

WebSep 24, 2024 · Indexers are a syntactic convenience that enable you to create a class, struct, or interface that client applications can access as an array. The compiler will generate an Item property (or an alternatively named property if IndexerNameAttribute is present), and the appropriate accessor methods. Indexers are most frequently implemented in … WebOct 9, 2013 · 7. I'm not sure what exactly do You need, but if You want to get value of certain index in list C# You can just do this using square brackets syntax: …

WebSep 29, 2024 · Collection initializers let you specify one or more element initializers when you initialize a collection type that implements IEnumerable and has Add with the appropriate signature as an instance method or an extension method. The element initializers can be a simple value, an expression, or an object initializer. WebA Return to the Object introduces the reader to the historical and theoretical framework out of which an anthropology of art has emerged, and examines the conditions under which it has renewed interest. It also shows the reader what art 'does' as a social and cultural phenomenon, and how it can impact alternative ways of organising and managing ...

WebMar 31, 2024 · The SortedList.SetByIndex () method is used to set the value using the index. It replaces the existing value with a new value which is given in SetByIndex () method. Syntax void SortedList.SetByIndex (int index, object? value); Parameter (s) index: The index at which to set the value.

WebOct 3, 2014 · Starting with C# 8.0 you can use Index and Range classes for accessing elements. They provides accessing from the end of sequence or just access a specific part of sequence: var lastElement = myList [^1]; // Using Index var fiveElements = myList [2..7]; // Using Range, note that 7 is exclusive. You can combine indexes and ranges together: check my lotto tickets floridaWebApr 2, 2024 · The IndexOf method finds an item in a List. The IndexOf method returns -1 if no items are located in the List. The following code snippet finds a string and returns the matched position of the item. int … check my lowe\u0027s order statusWebFeb 16, 2016 · Solution 1. To access the list item you can use the index as you're doing above. But to take the object value you have to cast the list object to OrderField and … flatfoods grocery storeWebFeb 1, 2024 · Here index is the zero-based index of the value to get. Return Value: It returns the value at the specified index of the SortedList object. Exception: This method will throw ArgumentOutOfRangeException if the index is outside the range of valid indexes for the SortedList object. Below programs illustrate the use of above-discussed method: flatfoot 56 i\\u0027ll fly awayWebMar 7, 2024 · The List enables you to reference individual items by index as well. You place the index between [and ] tokens following the list name. C# uses 0 for the first index. Add this code directly below the code you just added and try it: Console.WriteLine($"My name is {names[0]}"); Console.WriteLine($"I've added {names[2]} and {names[3]} to the ... flatfoot 56 knuckles upWebMay 27, 2024 · Fish fish = NoahsArk.Where(f => f is Fish) .Cast() .OrderByDescending(f => f.Scales) .FirstOrDefault(); As it's easier to read than a single line, but that's personal preference. You definitely don't want to use an index to remove items as any index you could get would be indexing the input list as filtered by the Where which … flat foot 56 coversWebIndexOf will only return the index of the first one it comes across. Well, since it's not actually a List, you could use myList.Select ( (person, index) => new { Person = person, Index = index }).FirstOrDefault (entry => entry.Person.Name == myName); but honestly, I'm not sure if that's necessary "better" than what you have (though it would ... flatfoot 56 penny lyrics