Sorting Arrays

[Durand]

Hi all,

I am using a sort method from Array class to order in ascending way. What
can I do to descending way using same sort method?

Thanks

Durand

[Jon Skeet [C# MVP]]

Durand <ca***********@terra.com.br> wrote:

I am using a sort method from Array class to order in ascending way. What
can I do to descending way using same sort method?

Either use an IComparator instance which gives the reverse of the
normal sort order (if you already have an IComparator, you could very
easily write an IComparator which just returned the reverse of whatever
that comparator would return) or sort the array first and then call
Array.Reverse.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Wim Hollebrandse]

IComparator in Java, IComparer interface in C#...

;-)

Cheers,
Wim Hollebrandse
http://www.wimdows.net
http://www.wimdows.com

---
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[Jon Skeet [C# MVP]]

Wim Hollebrandse <[e-mail]> wrote:

IComparator in Java, IComparer interface in C#...

Oops - just Comparator in Java, in fact :)

Serves me right for not checking though - which I'd have done if I'd
given a sample for how to write a reversing IComparer. Just for
reference, here it is:

using System;
using System.Collections;

public class ReversingComparer : IComparer
{
IComparer original;

public ReversingComparer (IComparer original)
{
if (original==null)
{
throw new ArgumentNullException ("original");
}
this.original = original;
}

public int Compare (object x, object y)
{
return -original.Compare (x, y);
}
}

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Durand]

Thanks all, it woks!

"Jon Skeet [C# MVP]" <sk***@pobox.com> wrote in message
news:MP************************@msnews.microsoft.c om...

Wim Hollebrandse <[e-mail]> wrote:

IComparator in Java, IComparer interface in C#...

Oops - just Comparator in Java, in fact :)

Serves me right for not checking though - which I'd have done if I'd
given a sample for how to write a reversing IComparer. Just for
reference, here it is:

using System;
using System.Collections;

public class ReversingComparer : IComparer
{
IComparer original;

public ReversingComparer (IComparer original)
{
if (original==null)
{
throw new ArgumentNullException ("original");
}
this.original = original;
}

public int Compare (object x, object y)
{
return -original.Compare (x, y);
}
}

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too