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  3. If it's nullable, then it can't be a boolean.

If it's nullable, then it can't be a boolean.

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  • H Henry Minute

    I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

    Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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    Ian Shlasko
    wrote on last edited by
    #2

    Henry Minute wrote:

    trilean.

    You spelled that wrong... It's 'Trillian[^]'

    Proud to have finally moved to the A-Ark. Which one are you in?
    Author of the Guardians Saga (Sci-Fi/Fantasy novels)

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    • H Henry Minute

      I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

      Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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      Lost User
      wrote on last edited by
      #3

      This sort of thing[^]?

      Every man can tell how many goats or sheep he possesses, but not how many friends.

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      • H Henry Minute

        I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

        Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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        Rhys Gravell
        wrote on last edited by
        #4

        Henry Minute wrote:

        so why call it a nullable bool

        No such beast exists, nor shall it ever, (well as long as we're talking C#). It's an instance of the generic nullable struct with an underlying boolean value type. Obviously this doesn't roll of the tongue so well however, maybe nullable representative boolean?

        Rhys "I'd rather die on my feet than live on my knees"

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        • H Henry Minute

          I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

          Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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          CPallini
          wrote on last edited by
          #5

          Three-state[^]. :)

          If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
          This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
          [My articles]

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          • H Henry Minute

            I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

            Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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            Mark_Wallace
            wrote on last edited by
            #6

            Ah, but null is the absence of a value, so the Boolean actually disappears up the division between its cheeks values.

            I wanna be a eunuchs developer! Pass me a bread knife!

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            • C CPallini

              Three-state[^]. :)

              If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
              This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
              [My articles]

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              leppie
              wrote on last edited by
              #7

              CPallini wrote:

              Three-state[^].

              Cool kids say: Tri-state :)

              ((λ (x) `(,x ',x)) '(λ (x) `(,x ',x)))

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              • L leppie

                CPallini wrote:

                Three-state[^].

                Cool kids say: Tri-state :)

                ((λ (x) `(,x ',x)) '(λ (x) `(,x ',x)))

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                Dalek Dave
                wrote on last edited by
                #8

                Cool Italian Kids say Trieste

                ------------------------------------ I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave CCC Link[^] Trolls[^]

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                • R Rhys Gravell

                  Henry Minute wrote:

                  so why call it a nullable bool

                  No such beast exists, nor shall it ever, (well as long as we're talking C#). It's an instance of the generic nullable struct with an underlying boolean value type. Obviously this doesn't roll of the tongue so well however, maybe nullable representative boolean?

                  Rhys "I'd rather die on my feet than live on my knees"

                  H Offline
                  H Offline
                  Henry Minute
                  wrote on last edited by
                  #9

                  goblinTech wrote:

                  No such beast exists,

                  That may well be true, but I have seen many such references.

                  Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

                  R 1 Reply Last reply
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                  • D Dalek Dave

                    Cool Italian Kids say Trieste

                    ------------------------------------ I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave CCC Link[^] Trolls[^]

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                    C Offline
                    CPallini
                    wrote on last edited by
                    #10

                    Cool Italian Kids say Roma. :cool:

                    If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                    This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                    [My articles]

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                    • H Henry Minute

                      I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

                      Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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                      Nemanja Trifunovic
                      wrote on last edited by
                      #11

                      Henry Minute wrote:

                      I can only come up with truelean or trilean.

                      Almost. There is Boost.Tribool[^] library. An example of use:

                      tribool a (true);
                      tribool b (false);
                      tribool c (indeterminate);

                      if (indeterminate (a) && !b) do_something();

                      utf8-cpp

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                      • H Henry Minute

                        goblinTech wrote:

                        No such beast exists,

                        That may well be true, but I have seen many such references.

                        Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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                        Rhys Gravell
                        wrote on last edited by
                        #12

                        Yeah, I know. The terminology used in describing nullable types and the misuderstanding it leads to is a bit of a pet hate, as you may well guess from my reply :-)

                        Rhys "I'd rather die on my feet than live on my knees"

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                        • H Henry Minute

                          I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

                          Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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                          RugbyLeague
                          wrote on last edited by
                          #13

                          Buddhist bool

                          B 1 Reply Last reply
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                          • H Henry Minute

                            I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

                            Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

                            R Offline
                            R Offline
                            Richard A Dalton
                            wrote on last edited by
                            #14

                            Henry Minute wrote:

                            so why call it a nullable bool?
                             
                            Anyone got a better name?

                            A Boolean Nullable would be technically more accurate. -Richard

                            Hit any user to continue.

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                            • H Henry Minute

                              I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

                              Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

                              R Offline
                              R Offline
                              R Giskard Reventlov
                              wrote on last edited by
                              #15

                              Surely it should be called 'noolean'?

                              "If you think it's expensive to hire a professional to do the job, wait until you hire an amateur." Red Adair. nils illegitimus carborundum me, me, me

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                              • H Henry Minute

                                I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

                                Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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                                Keith Barrow
                                wrote on last edited by
                                #16

                                Closest I can come up with is ternary. There is Balanced Ternary[^], but the "don't care" value is 0 (-1 false, +1 true) though null might better describe a don't "care state" ?

                                Sort of a cross between Lawrence of Arabia and Dilbert.[^]
                                -Or-
                                A Dead ringer for Kate Winslett[^]

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                                • K Keith Barrow

                                  Closest I can come up with is ternary. There is Balanced Ternary[^], but the "don't care" value is 0 (-1 false, +1 true) though null might better describe a don't "care state" ?

                                  Sort of a cross between Lawrence of Arabia and Dilbert.[^]
                                  -Or-
                                  A Dead ringer for Kate Winslett[^]

                                  D Offline
                                  D Offline
                                  Dalek Dave
                                  wrote on last edited by
                                  #17

                                  How about a 'Meh'?

                                  ------------------------------------ I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave CCC Link[^] Trolls[^]

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                                  • H Henry Minute

                                    I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

                                    Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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                                    Lost User
                                    wrote on last edited by
                                    #18

                                    Don't come with that. It reminds me too much of a database where some (censored word) declared boolean columns as varchar(1) and used the letter 'X' as true and null as false. And of course his application failed when there was anything else than 'X' or null in those columns. No doubt that he also would have created a similar chaos if he had known that you can have nullable value types.

                                    "Dark the dark side is. Very dark..." - Yoda ---
                                    "Shut up, Yoda, and just make yourself another toast." - Obi Wan Kenobi

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                                    • D Dalek Dave

                                      How about a 'Meh'?

                                      ------------------------------------ I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave CCC Link[^] Trolls[^]

                                      C Offline
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                                      Colin Mullikin
                                      wrote on last edited by
                                      #19

                                      How about a 'Bacon'? Seems as good a choice as any.

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                                      • H Henry Minute

                                        I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

                                        Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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                                        clientSurfer
                                        wrote on last edited by
                                        #20

                                        I like bullean

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                                        • H Henry Minute

                                          I'm sure that a subject of such import must have been discussed here before, but if so, I missed it. If it can have more than two values it cannot really be a boolean value, so why call it a nullable bool? Anyone got a better name? I can only come up with truelean or trilean.

                                          Henry Minute Do not read medical books! You could die of a misprint. - Mark Twain Girl: (staring) "Why do you need an icy cucumber?" “I want to report a fraud. The government is lying to us all.” I wouldn't let CG touch my Abacus! When you're wrestling a gorilla, you don't stop when you're tired, you stop when the gorilla is.

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                                          J Offline
                                          Joan M
                                          wrote on last edited by
                                          #21

                                          In Spanish a "trilero" is a guy who use three cards or pots to hide a small ball to cheat tourists in crowded streets... so avoid that name... if you don't avoid it one of your variables could go to jail... :rolleyes:

                                          [www.tamelectromecanica.com] Robots, CNC and PLC machines for grinding and polishing.

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