namespace MyExtensions
{
    public static class CustomExtensions
    {
        public static int IndexOfCPP(this string str, string pattern)
        {
            return str.IndexOf(pattern) + 1;
        }
        public static int IndexOfCPP(this string str, char pattern, int startindex)
        {
            return str.IndexOf(pattern, startindex - 1) + 1;
        }

        public static string RemoveCPP(this string str, int startindex, int lenght)
        {
            return str.Remove(startindex - 1, lenght);
        }

        public static string SubstringCPP(this string str, int startindex, int lenght)
        {
            return str.Substring(startindex - 1, lenght);
        }
        
        public static string StringReplace(string S, string OldPattern, string NewPattern)
        {
            return S.Replace(OldPattern, NewPattern);
        }

        public static string StringReplace(string S, char OldPattern, char NewPattern)
        {
            return S.Replace(OldPattern, NewPattern);
        }

        public static bool IsEmpty(this string str)
        {
            return string.IsNullOrEmpty(str);
        }

        public static bool IsZero(this Single A)
        {
            return A < Single.Epsilon;
        }

    }
}