index of item in list C#
List<string> strings = new List<string>(){"bob","ate","an", "apple"};
strings.IndexOf("bob");
//returns 0
strings.IndexOf("an");
//returns 2
strings.IndexOf("apple");
//returns 3
strings.IndexOf("banana");
//returns -1
//Because banana is not in the list, IndexOf() returns -1c# find all indexes
public static int[] FindAllIndexOf<T>(this T[] array, Predicate<T> filter)
{
// Note: If select does not find a match returns index as "-1"
int[] indexes = array.Select((elementInArray, index) => filter(elementInArray) ? index : -1)
.Where(index => index != -1).ToArray();
return indexes;
}get index c#
int index = myList.FindIndex(a => a.Prop == oProp);Copyright © 2021 Codeinu
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