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  3. Nullable types??

Nullable types??

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  • 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)

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    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.

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      • 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.

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        • B Bardy85

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

          S Offline
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          Shog9 0
          wrote on last edited by
          #28

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

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          • B Bardy85

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

            M Offline
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            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

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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

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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

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                • S Shog9 0

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

                  D Offline
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                  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

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                  • 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...)

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                    • 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

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                      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
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                      • 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

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                        P Offline
                        PIEBALDconsult
                        wrote on last edited by
                        #35

                        Throw in something about dangling pointers.

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                        • 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:

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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...

                            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
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                              • 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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