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  3. Nullable types??

Nullable types??

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  • D Dave Kreskowiak

    Bardy85 wrote:

    Are they good or are they bad?

    Neither. You use the correct tool for the job. Nullable types are just another tool in the toolbox. They serve a specific surpose. I don't qualify them as "good" or "bad".

    A guide to posting questions on CodeProject[^]
    Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
         2006, 2007, 2008
    But no longer in 2009...

    B Offline
    B Offline
    Bardy85
    wrote on last edited by
    #22

    True. What ever is best for the job. Simple. easy. For some reason when I code, I sit for hours wasting time, trying to find the best way foward. I know there are always a handfull of ways to accomplish a given task. I'm just trying to find the "best",most effecient,simplest solution. Maybe that it. Time. Every ms counts. Oh well. Think it's just monday driving me up the wall. Thanks anyway.

    D 1 Reply Last reply
    0
    • J Jim Crafton

      I'd reply, but I'm in the middle of an access violation...

      ¡El diablo está en mis pantalones! ¡Mire, mire! SELECT * FROM User WHERE Clue > 0 0 rows returned Save an Orange - Use the VCF! Personal 3D projects Just Say No to Web 2 Point Blow

      J Offline
      J Offline
      Joan M
      wrote on last edited by
      #23

      Are you violating MS Access? :rolleyes:

      [www.tamelectromecanica.com][www.tam.cat]

      D 1 Reply Last reply
      0
      • B Bardy85

        Nullable or Not. That is the question. Are they good or are they bad? What are YOUR thoughts?

        J Offline
        J Offline
        Joan M
        wrote on last edited by
        #24

        Once I met one that was really, really bad... :rolleyes:

        [www.tamelectromecanica.com][www.tam.cat]

        1 Reply Last reply
        0
        • I Ian Shlasko

          bool areNullablesGood = ("the month".indexOf('R') >= 0); Well, that answers that.

          Proud to have finally moved to the A-Ark. Which one are you in? Developer, Author (Guardians of Xen)

          L Offline
          L Offline
          Luc Pattyn
          wrote on last edited by
          #25

          Ian Shlasko wrote:

          bool areNullablesGood = ("the month".indexOf('R') >= 0);

          That seems pretty close to the truth, as (1) months have at most one capital letter (never an R), (2) and "the month" has none. :)

          Luc Pattyn [Forum Guidelines] [My Articles]


          The quality and detail of your question reflects on the effectiveness of the help you are likely to get. Show formatted code inside PRE tags, and give clear symptoms when describing a problem.


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          • J Joan M

            Are you violating MS Access? :rolleyes:

            [www.tamelectromecanica.com][www.tam.cat]

            D Offline
            D Offline
            Dan Neely
            wrote on last edited by
            #26

            MS access users are violated.

            The European Way of War: Blow your own continent up. The American Way of War: Go over and help them.

            G 1 Reply Last reply
            0
            • B Bardy85

              True. What ever is best for the job. Simple. easy. For some reason when I code, I sit for hours wasting time, trying to find the best way foward. I know there are always a handfull of ways to accomplish a given task. I'm just trying to find the "best",most effecient,simplest solution. Maybe that it. Time. Every ms counts. Oh well. Think it's just monday driving me up the wall. Thanks anyway.

              D Offline
              D Offline
              Dan Neely
              wrote on last edited by
              #27

              Don't use them when you don't have to. Every time you call an API expecting a non nullable value you'll have to do validation/conversion of your nullables.

              The European Way of War: Blow your own continent up. The American Way of War: Go over and help them.

              1 Reply Last reply
              0
              • B Bardy85

                Nullable or Not. That is the question. Are they good or are they bad? What are YOUR thoughts?

                S Offline
                S Offline
                Shog9 0
                wrote on last edited by
                #28

                Bad. But inconsistency is worse. Rather all types be nullable than just a subset...

                D 1 Reply Last reply
                0
                • B Bardy85

                  Nullable or Not. That is the question. Are they good or are they bad? What are YOUR thoughts?

                  M Offline
                  M Offline
                  Marc Clifton
                  wrote on last edited by
                  #29

                  Useless, because there's no mapping of a nullable type to an object with value DBNull.Value. Marc

                  Will work for food. Interacx

                  I'm not overthinking the problem, I just felt like I needed a small, unimportant, uninteresting rant! - Martin Hart Turner

                  1 Reply Last reply
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                  • B Bardy85

                    Nullable or Not. That is the question. Are they good or are they bad? What are YOUR thoughts?

                    J Offline
                    J Offline
                    Judah Gabriel Himango
                    wrote on last edited by
                    #30

                    Given that the inventor of null calls it his "billion dollar mistake[^]", I think it's safe to say null references are bad. Or did you mean System.Nullable<T> in the .NET framework?

                    Religiously blogging on the intarwebs since the early 21st century: Kineti L'Tziyon Judah Himango

                    1 Reply Last reply
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                    • B Bardy85

                      Nullable or Not. That is the question. Are they good or are they bad? What are YOUR thoughts?

                      T Offline
                      T Offline
                      Todd Smith
                      wrote on last edited by
                      #31

                      I usually use them in conjunction with a database and linq. But I don't see why they can't be used whenever the need arises. http://qconlondon.com/london-2009/presentation/Null+References:+The+Billion+Dollar+Mistake[^]

                      Todd Smith

                      1 Reply Last reply
                      0
                      • S Shog9 0

                        Bad. But inconsistency is worse. Rather all types be nullable than just a subset...

                        D Offline
                        D Offline
                        Dario Solera
                        wrote on last edited by
                        #32

                        Well, all value types are non-nullable by default. You can make them nullable by wrapping them in a class. This is done automatically in .NET with the "?" operator.

                        If you truly believe you need to pick a mobile phone that "says something" about your personality, don't bother. You don't have a personality. A mental illness, maybe - but not a personality. - Charlie Brooker My Photos/CP Flickr Group - ScrewTurn Wiki

                        S 1 Reply Last reply
                        0
                        • D Dario Solera

                          Well, all value types are non-nullable by default. You can make them nullable by wrapping them in a class. This is done automatically in .NET with the "?" operator.

                          If you truly believe you need to pick a mobile phone that "says something" about your personality, don't bother. You don't have a personality. A mental illness, maybe - but not a personality. - Charlie Brooker My Photos/CP Flickr Group - ScrewTurn Wiki

                          S Offline
                          S Offline
                          Shog9 0
                          wrote on last edited by
                          #33

                          Yeah... And boy is that not slick. :rolleyes:  ("Yay!" i thought to myself, upon hearing of this for the first time... "Now i can write generic code that treats value types and reference types the same!" The gods of .NET proceeded to laugh heartily at my naivete...)

                          1 Reply Last reply
                          0
                          • realJSOPR realJSOP

                            Using my astounding precognitive powers, I predict that this will be a pointless thread.

                            "Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
                            -----
                            "...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

                            O Offline
                            O Offline
                            Oakman
                            wrote on last edited by
                            #34

                            John Simmons / outlaw programmer wrote:

                            Using my astounding precognitive powers, I predict that this will be a pointless thread.

                            I knew you were going to say that.

                            Jon "One loves to possess arms, though they hope never to have occasion for them." --Thomas Jefferson to George Washington, 1796. Soap Box 1.0: the first, the original, reborn troll-less

                            1 Reply Last reply
                            0
                            • D Douglas Troy

                              Jim Crafton wrote:

                              Sounds like you're suffering from a stack overflow?

                              Sounds like a medical condition that afflicts older developers. [cue drug company commercial here] Do you suffer from Stack Overflow? Is this affecting your love life? Work? Family? Friends? Millions of aging Software Developers, like you, live with SOF everyday. Well, worry no more. With Stacagra, you'll regain your confidence and management over your Stack once again. :rolleyes:


                              :..::. Douglas H. Troy ::..
                              Bad Astronomy |VCF|wxWidgets|WTL

                              modified on Monday, August 3, 2009 11:54 AM

                              P Offline
                              P Offline
                              PIEBALDconsult
                              wrote on last edited by
                              #35

                              Throw in something about dangling pointers.

                              G 1 Reply Last reply
                              0
                              • B Bardy85

                                Nullable or Not. That is the question. Are they good or are they bad? What are YOUR thoughts?

                                P Offline
                                P Offline
                                PIEBALDconsult
                                wrote on last edited by
                                #36

                                Well, they're low in fat, sodium, and carbohydrates, and contain no alcohol; how can that be good? :confused:

                                1 Reply Last reply
                                0
                                • D Dave Kreskowiak

                                  Bardy85 wrote:

                                  Are they good or are they bad?

                                  Neither. You use the correct tool for the job. Nullable types are just another tool in the toolbox. They serve a specific surpose. I don't qualify them as "good" or "bad".

                                  A guide to posting questions on CodeProject[^]
                                  Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
                                       2006, 2007, 2008
                                  But no longer in 2009...

                                  realJSOPR Offline
                                  realJSOPR Offline
                                  realJSOP
                                  wrote on last edited by
                                  #37

                                  You just ruined an otherwise pointless thread with serious commentary. Get with the program.

                                  "Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
                                  -----
                                  "...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

                                  D 1 Reply Last reply
                                  0
                                  • P PIEBALDconsult

                                    Throw in something about dangling pointers.

                                    G Offline
                                    G Offline
                                    Gary Wheeler
                                    wrote on last edited by
                                    #38

                                    What about "raising" an exception?

                                    Software Zen: delete this;

                                    1 Reply Last reply
                                    0
                                    • D Dan Neely

                                      MS access users are violated.

                                      The European Way of War: Blow your own continent up. The American Way of War: Go over and help them.

                                      G Offline
                                      G Offline
                                      Gary Wheeler
                                      wrote on last edited by
                                      #39

                                      MS Access users are should be violated. - ftfy

                                      Software Zen: delete this;

                                      1 Reply Last reply
                                      0
                                      • realJSOPR realJSOP

                                        You just ruined an otherwise pointless thread with serious commentary. Get with the program.

                                        "Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
                                        -----
                                        "...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

                                        D Offline
                                        D Offline
                                        Dave Kreskowiak
                                        wrote on last edited by
                                        #40

                                        NOW who's the outlaw? :laugh:

                                        A guide to posting questions on CodeProject[^]
                                        Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
                                             2006, 2007, 2008
                                        But no longer in 2009...

                                        1 Reply Last reply
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