Mega Code Archive
0656 Named Groups
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Here's a rewrite of the previous example, using a group that we name 'letter':
using System;
using System.Text.RegularExpressions;
class Program
{
static void Main(string[] args)
{
string regEx =
@"\b" + // word boundary
@"(?'letter'\w)" + // match first letter, and name it 'letter'
@"\w+" + // match middle letters
@"\k'letter'" + // match last letter, denoted by 'letter'
@"\b"; // word boundary
foreach (Match m in Regex.Matches ("bee cake level bob", regEx))
Console.Write (m + " ");
}
}
The output:
level bob
To name a captured group:
(?'group-name'group-expr) or (?<group-name>group-expr)
To refer to a group:
\k'group-name' or \k<group-name>
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