Question

How to use IndexOfAny() to search a string for many characters in C#

Answer 1

using System;
using System.Collections.Generic;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            const string s1 = "c# programming";
            const string s2 = "java programming";

            int i = s1.IndexOfAny(new char[] {'#', 'm'});
            Console.WriteLine("index = " + i);
            Console.WriteLine(s1.Substring(i));

            i = s2.IndexOfAny(new char[] { 'y', 'z' });
            Console.WriteLine("\nindex = " + i);

            if (i >= 0)
                Console.WriteLine(s2.Substring(i));
            else
                Console.WriteLine("not found");
        }
    }
}


/*
run:
      
index = 1
# programming

index = -1
not found

*/

 

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