I want to look up the index of an array by a value:
List<string> list = new List<string>() { "Leão", "Guepardo", "Elefante" };
String[] array = new String[3] { "Leão", "Guepardo", "Elefante" };
For example, I want to look up the index of the value "Elephant", how can I do this? Is there a method? Can linq be able to do this search and return me an index?
For the array has this:
Array.IndexOf(array, "Elefante")
To list is:
list.IndexOf("Elefante")
Example:
using System;
using static System.Console;
using System.Collections.Generic;
public class Program {
public static void Main() {
var list = new List<string>() { "Leão", "Guepardo", "Elefante" };
var array = new string[3] { "Leão", "Guepardo", "Elefante" };
WriteLine(list.IndexOf("Elefante"));
WriteLine(Array.IndexOf(array, "Elefante"));
}
}
See running on .NET Fiddle . And in Coding Ground . Also I placed GitHub for future reference .
I think this might solve your problem:
int index = list.FindIndex(a => a == "Elefante");
Do a linear search to get the index.
Search the specified object and return the zero-based index of the first occurrence within the entire List
list.IndexOf("Elefante")
Search the specified object and return the index of the first occurrence in a one-dimensional array.
Array.IndexOf(array, "Elefante")
7D% 22 "> Running on dot.net fiddle