Do you want to play?

Matthieu MEZIL — Mon, 11 Aug 2008 13:08:00 GMT

Friday, I posted a quizz but I have no answer yet.

Are French the only ones who know how to use the new features of C#3?

More seriously, I continue to post quizz questions on my French blog. Do you want me to post them also in English?

Summer Geek Quizz

Matthieu MEZIL — Fri, 08 Aug 2008 13:37:00 GMT

Mitsu makes again his geek quizz in French which is some quizz on C# 3.0 and LINQ.

And I will do the same.

For my first quizz, the idea is to write a method which has an IEnumerable<IEnumerable<T>> parameter and which returns all the distinct elements which are on all sub-groups.

static void Main(string[] args)
{
    Console.WriteLine("Test 1");
    foreach (int i in GetElementsInAllGroups(new int[][] { new int[] { 1, 2, 3, 3 }, new int[] { 2, 2, 3, 4 } }))
        Console.WriteLine("\t{0}", i);
 
    Console.WriteLine("Test 2");
    foreach (int i in GetElementsInAllGroups(new int[][] { new int[] { 1, 2, 3, 3 }, new int[] { 2, 2, 3, 4 }, new int[]{1, 5, 6} }))
        Console.WriteLine("\t{0}", i);
 
    Console.WriteLine("Test 3");
    foreach (int i in GetElementsInAllGroups(new int[][] { new int[0] }))
        Console.WriteLine("\t{0}", i);
 
    Console.WriteLine("Test 4");
    foreach (int i in GetElementsInAllGroups(new int[][] { new int[] { 1, 2, 3, 3 }, new int[0] }))
        Console.WriteLine("\t{0}", i);
 
    Console.WriteLine("Test 5");
    foreach (int i in GetElementsInAllGroups(new int[][] { new int[] { 1, 2, 3, 3 }, null }))
        Console.WriteLine("\t{0}", i);
 
    Console.WriteLine("Test 6");
    foreach (int i in GetElementsInAllGroups(new int[][] { null, new int[] { 1, 2, 3, 3 } }))
        Console.WriteLine("\t{0}", i);
 
    Console.WriteLine("Test 7");
    foreach (int i in GetElementsInAllGroups(new int[][] { null }))
        Console.WriteLine("\t{0}", i);
 
    Console.WriteLine("Test 8");
    foreach (int i in GetElementsInAllGroups(new int[0][]))
        Console.WriteLine("\t{0}", i);
 
    Console.WriteLine("Test 9");
    foreach (int i in GetElementsInAllGroups<int>(null))
        Console.WriteLine("\t{0}", i);
}
 
public static IEnumerable<T> GetElementsInAllGroups<T>(IEnumerable<IEnumerable<T>> values)
{
    // Code it
}

The console result is:

Test 1
2
3
Test 2
Test 3
Test 4
Test 5
Test 6
Test 7
Test 8
Test 9

Why 2 and 3 in the Test 1? Because 2 and 3 are the only ones on {1, 2, 3, 3} and {2, 2, 3, 4}.

Enjoy

Matthieu MEZIL : Quizz

Do you want to play?

Summer Geek Quizz