How do I split a string into digit and char

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i want to split a string into digit and char
eg: string =jan30
output should be month =jan date =30

What I have tried:

i want to split a string into digit and char
eg: string =jan30
output should be month =jan date =30

Posted 30-Nov-20 23:32pm

john321a

Updated 1-Dec-20 10:46am

PIEBALDconsult

v2

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PIEBALDconsult 1-Dec-20 9:10am

Definitely Regular Expressions.

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OriginalGriff · Answer 1 · 2020-12-01T00:01:00

Try a regex:

C#

using System.Text.RegularExpressions;
...
/// <summary>
///  Regular expression built for C# on: Tue, Dec 1, 2020, 10:54:16 AM
///  Using Expresso Version: 3.0.4750, http://www.ultrapico.com
///  
///  A description of the regular expression:
///  
///  [month]: A named capture group. [[a-zA-Z]+]
///      Any character in this class: [a-zA-Z], one or more repetitions
///  [day]: A named capture group. [\d+]
///      Any digit, one or more repetitions
///  
///
/// </summary>
public static Regex GetMonthAndDay = new Regex(
      "(?<month>[a-zA-Z]+)(?<day>\\d+)",
    RegexOptions.IgnoreCase
    | RegexOptions.Multiline
    | RegexOptions.CultureInvariant
    | RegexOptions.IgnorePatternWhitespace
    | RegexOptions.Compiled
    );
...
            Match m = GetMonthAndDay.Match("Jan30");
            if (m.Success)
                {
                string month = m.Groups["month"].Value;
                string day = m.Groups["day"].Value;
                }

Get a copy of Expresso[^] - it's free, and it examines and generates Regular expressions.

George Swan · Answer 2 · 2020-12-01T10:46:00

A Regular Expression is probably the best way to go. Personally, I dislike the syntax, it looks like a cat has walked across the top rows of the keyboard. Fortunately, if your string format is constant, you can simply split the string on the first digit found and return the result as a value Tuple (string month, string date). Something like this.

C#

private static (string month, string date) SplitMonthAndDayOfMonth(string s)
    {
        for (int i = 0; i < s.Length; i++)
        {
            if (char.IsDigit(s[i]))
            {
                return (s.Substring(0, i), s.Substring(i));
            }
        }
        return (string.Empty, string.Empty);
    }

    private static void Main(string[] args)
    {
        string s = "Jan30";
        var (month, day) = SplitMonthAndDayOfMonth(s);
        Console.WriteLine($"Month is {month} date is {day}");
        Console.ReadLine();
    }

How do I split a string into digit and char

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