WebApr 10, 2024 · web与HTTP协议. HTML叫做超文本标记语言，是一种规范，也是一种标准，它通过标记符号来标记要显示的网页中的各个部分。. 网页文件本身是一种文本文件，通过在文本文件中添加标记符，可以告诉浏览器如何显示其中的内容。. HTML文件可以使用任何能够生成txt ... WebAug 23, 2013 · Here is how you can get the index: var index = InvalidSheets.Select ( (x, i) => new {Item = x, Index = i}) .First (x => x.Item != null && x.Item.FilePath == itemRow.Tag.ToString ()) .Index; However you might want to refactor this with FirstOrDefault like this:
c# - Check if element at position [x] exists in the list
WebIndexOf 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 ... WebOct 11, 2013 · int index = random.Next (questions.Count); // according to the lower-case random see last paragraph instead of int index = Random.Next (strings.Count); Since there is no variable with the name strings and you want to remove one question anyway. Also, you cannot return something from a void method. So create one that returns the list: cheryl royle family
C# : How can I get the index of an item in a list in a single …
WebJun 8, 2024 · Sometimes, when looping over a collection of elements in C#, you need not only the items itself, but also its position in the collection. ... How to get the index of the current element in a foreach loop? The … WebFeb 14, 2014 · foundHelloWorld = searchInList .Select ( (v,i)=>new {Index = i, Value = v}) .Where (x=>x.Value == "Hello World") .Select (x=>x.Index) .ToList (); The above code takes the list and transforms the string into a simple anonymous type incorporating each item's place in the original list. Then, it filters down to only matching elements, and then it ... WebAdd a comment. 56. Sure, it's pretty easy: var index = list.Select ( (value, index) => new { value, index = index + 1 }) .Where (pair => SomeCondition (pair.value)) .Select (pair => pair.index) .FirstOrDefault () - 1; That will return the index if it finds anything matching, or -1 otherwise. The +1 and -1 is to get the behaviour for the case ... flights to ohara from rome italy