Anonymous Types and Regular Expressions

Regular Expressions are great, and they aren't bad to program, but . It is "non-obvious" which field you are supposed to use. A group is a capture, and has captures, so where is your named capture group to get that simple piece of text?

In the spirit of the "pit of success" here's a quick way to use Regex in your program and you only have to remember one call. We'll do this by casting to an anonymous type. It looks a tad wierd, but it is super easy to use. Super easy, the second time.

using System;
using RegularExpressions;

namespace egrep
{

    class egrep
    {
        static void Main(string[] args)
        {
            string text = "The the quick brown fox  fox jumped over the lazy dog dog.";

            var matches = Regex.grep(text, @"\b(?<double_word>\w+)\s+(\k<double_word>)\b",
                 new { double_word = "" });

            foreach (var find in matches)
                Console.WriteLine(find.double_word);
            }
        }
    }