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Sorting in LinkedList<>

Hi.

Mostly I program in C++, and I'm not fluent in C# and .NET. In my last
project I began to use LinkedList<and suddenly noticed that can't
find a way to sort it. Does it mean I must implement sorting for
LinkedList<myse lf?

Thanks in advance

Martin

Dec 14 '06 #1
20 20920

"martin-g" <ma******@mail. ruwrote in message
news:11******** **************@ f1g2000cwa.goog legroups.com...
Hi.

Mostly I program in C++, and I'm not fluent in C# and .NET. In my last
project I began to use LinkedList<and suddenly noticed that can't
find a way to sort it. Does it mean I must implement sorting for
LinkedList<myse lf?

Thanks in advance

Martin
So it would appear.
Perhaps this article would be helpful to you:

http://msdn2.microsoft.com/en-us/library/6tc79sx1.aspx
Dec 14 '06 #2
pvdg42 wrote:
So it would appear.
Perhaps this article would be helpful to you:

http://msdn2.microsoft.com/en-us/library/6tc79sx1.aspx
Thank you for answer. That's really wild... Looking through the article
I couldn't eventually select the collection class of my need. On the
one hand I want an item to be added to the container at constant time
at any position, so must use LinkeList<>. On the other hand I want to
sort the container, so I must use List<>. FCL has really strange
container organization... Only now I understood: I love STL very much...

Dec 14 '06 #3
martin-g wrote:
pvdg42 wrote:
So it would appear.
Perhaps this article would be helpful to you:

http://msdn2.microsoft.com/en-us/library/6tc79sx1.aspx

Thank you for answer. That's really wild... Looking through the article
I couldn't eventually select the collection class of my need. On the
one hand I want an item to be added to the container at constant time
at any position, so must use LinkeList<>. On the other hand I want to
sort the container, so I must use List<>. FCL has really strange
container organization... Only now I understood: I love STL very much...
So you want constant time insertions and the ability to sort the
collection. The List<collection sounds like a good match.
Insertions are usually O(1) and you can call the Sort method to sort
the collection. Have you looked at SortedDictionar y yet? Insertions
are a bit slower, but the items are always stored in order so there's
no need to perform a separate sort operation.

Brian

Dec 14 '06 #4
Brian Gideon <br*********@ya hoo.comwrote:
Thank you for answer. That's really wild... Looking through the article
I couldn't eventually select the collection class of my need. On the
one hand I want an item to be added to the container at constant time
at any position, so must use LinkeList<>. On the other hand I want to
sort the container, so I must use List<>. FCL has really strange
container organization... Only now I understood: I love STL very much...

So you want constant time insertions and the ability to sort the
collection. The List<collection sounds like a good match.
Insertions are usually O(1) and you can call the Sort method to sort
the collection. Have you looked at SortedDictionar y yet? Insertions
are a bit slower, but the items are always stored in order so there's
no need to perform a separate sort operation.
Insertions into a List<are certainly *not* O(1) in general. When
adding to the end of the list, the additions will be cheap if there's
enough room in the buffer. Otherwise, it requires a copy of all the
items after the new entry (or all the items if a new buffer is
required).

The MSDN docs say it's an O(n) operation too.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too
Dec 14 '06 #5
Jon wrote:
Brian Gideon <br*********@ya hoo.comwrote:
Thank you for answer. That's really wild... Looking through the article
I couldn't eventually select the collection class of my need. On the
one hand I want an item to be added to the container at constant time
at any position, so must use LinkeList<>. On the other hand I want to
sort the container, so I must use List<>. FCL has really strange
container organization... Only now I understood: I love STL very much...
So you want constant time insertions and the ability to sort the
collection. The List<collection sounds like a good match.
Insertions are usually O(1) and you can call the Sort method to sort
the collection. Have you looked at SortedDictionar y yet? Insertions
are a bit slower, but the items are always stored in order so there's
no need to perform a separate sort operation.

Insertions into a List<are certainly *not* O(1) in general. When
adding to the end of the list, the additions will be cheap if there's
enough room in the buffer. Otherwise, it requires a copy of all the
items after the new entry (or all the items if a new buffer is
required).

The MSDN docs say it's an O(n) operation too.
Yeah, wow, I'm not sure what I was thinking when I wrote that. In
fact, my whole post doesn't make any since...beginni ng, middle, and
end. That's one of those you just wish you could take back. Ya think
I can talk Google into deleting that one :)

Dec 15 '06 #6

Jon wrote:
Insertions into a List<are certainly *not* O(1) in general. When
adding to the end of the list, the additions will be cheap if there's
enough room in the buffer. Otherwise, it requires a copy of all the
items after the new entry (or all the items if a new buffer is
required).

The MSDN docs say it's an O(n) operation too.
So, List<isn't a linked list, it's an array...? I suppose it would
have to be, if it's meant to be the "first choice" collection for
general use.

Does Framework 2.0 even provide a true link list? Dumb question, I
know, but we're still on 1.1.... :-)

Dec 15 '06 #7
"Bruce Wood" <br*******@cana da.comwrote:
>Does Framework 2.0 even provide a true link list?
LinkedList<T>, which was already mentioned earlier in this thread...
Dec 15 '06 #8
Bruce Wood wrote:
So, List<isn't a linked list, it's an array...? I suppose it would
have to be, if it's meant to be the "first choice" collection for
general use.
Yes, List<is based on array.
Does Framework 2.0 even provide a true link list? Dumb question, I
know, but we're still on 1.1.... :-)
I was on 1.1 too, and decided to turn to 2.0 only for its LinkedList<>
generic collection. And some time later realized it's not the linked
list of my dreams.

Dec 15 '06 #9
Jon Skeet [C# MVP] wrote:
Well, System.Collecti ons.LinkedList still exists, and there's a generic
LinkedList as well.
I do apologise - of course there isn't a System.Collecti ons.LinkedList,
I don't know what I was thinking of...

Jon

Dec 15 '06 #10

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