Mega Code Archive
0402 GroupBy
<![CDATA[
Input: IEnumerable<TSource>
Lambda expression: TSource => TKey
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
class Program
{
static void Main()
{
string[] names = { "Java", "C#", "Javascript", "SQL", "Oracle", "Python", "C++", "C", "HTML", "CSS" };
IEnumerable< IGrouping<int,string>> grouping = names.GroupBy(s => s.Length);
foreach (IGrouping<int, string> group in grouping)
{
Console.WriteLine("Key: " + group.Key);
foreach (string filename in group)
Console.WriteLine(" - " + filename);
}
}
}
The output:
Key: 4
- Java
- HTML
Key: 2
- C#
Key: 10
- Javascript
Key: 3
- SQL
- C++
- CSS
Key: 6
- Oracle
- Python
Key: 1
- C
]]>