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PQOTD

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  • R Rage

    MISRA[^] Rule 33 & 34:

    The right hand operand of a || shall not contain side effects
    The operands of a logical || shall be primary expressions

    The example you gave is the very reason for the above two rules.

    ~RaGE();

    I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus Entropy isn't what it used to.

    B Offline
    B Offline
    BobJanova
    wrote on last edited by
    #19

    There's actually some nice concise uses of

    var result = DoSomething() && DoSomethingThatDependsOnIt();
    var result = DoSomething() || HandleFailureCase();

    It's even better in languages where you can use non-boolean types with the boolean operators.

    R F 2 Replies Last reply
    0
    • M Marc Clifton

      Programming Quiz of the day. I just wrote this code (C#), which did something very unexpected. What was it that it unexpectedly did?

      		bool more = ProcessFlyouts();
      		more = more || ProcessCarrierAnimations();
      

      How would you change it to "do the right thing?" Marc

      K Offline
      K Offline
      Keith Barrow
      wrote on last edited by
      #20

      Though Nish's and OG's examples will work, I think it is symantically better to do this:

      bool more = ProcessFlyouts();
      bool foo = ProcessCarrierAnimations();
      more = more || foo;

      Less terse code (normally bad) - but explicit in calling ProcessCarrierAnimations.

      PB 369,783 wrote:

      I just find him very unlikeable, and I think the way he looks like a prettier version of his Mum is very disturbing.[^]

      P 1 Reply Last reply
      0
      • M Marc Clifton

        Programming Quiz of the day. I just wrote this code (C#), which did something very unexpected. What was it that it unexpectedly did?

        		bool more = ProcessFlyouts();
        		more = more || ProcessCarrierAnimations();
        

        How would you change it to "do the right thing?" Marc

        P Offline
        P Offline
        PIEBALDconsult
        wrote on last edited by
        #21

        more |= ProcessCarrierAnimations(); ?

        You'll never get very far if all you do is follow instructions.

        1 Reply Last reply
        0
        • M Marc Clifton

          You should be able to glean what the programmer intends to happen from the code. :) Marc

          B Offline
          B Offline
          Bassam Abdul Baki
          wrote on last edited by
          #22

          Marc Clifton wrote:

          You should be able to glean what the programmer intends to happen from the code. :)

          Riiiiiiiiiiight!!! :)

          Web - BM - RSS - Math - LinkedIn

          1 Reply Last reply
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          • B BobJanova

            There's actually some nice concise uses of

            var result = DoSomething() && DoSomethingThatDependsOnIt();
            var result = DoSomething() || HandleFailureCase();

            It's even better in languages where you can use non-boolean types with the boolean operators.

            R Offline
            R Offline
            Rage
            wrote on last edited by
            #23

            Let's say I have never seen these two lines of code, OK ?

            ~RaGE();

            I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus Entropy isn't what it used to.

            1 Reply Last reply
            0
            • M Marc Clifton

              You should be able to glean what the programmer intends to happen from the code. :) Marc

              S Offline
              S Offline
              Simon_Whale
              wrote on last edited by
              #24

              Have you been to QA lately? :laugh:

              Every day, thousands of innocent plants are killed by vegetarians. Help end the violence EAT BACON

              1 Reply Last reply
              0
              • M Marc Clifton

                Programming Quiz of the day. I just wrote this code (C#), which did something very unexpected. What was it that it unexpectedly did?

                		bool more = ProcessFlyouts();
                		more = more || ProcessCarrierAnimations();
                

                How would you change it to "do the right thing?" Marc

                A Offline
                A Offline
                Andy Brummer
                wrote on last edited by
                #25

                var more = more || initalizeMore(); is a common practice in javascript.

                Curvature of the Mind now with 3D

                1 Reply Last reply
                0
                • Kornfeld Eliyahu PeterK Kornfeld Eliyahu Peter

                  I do not like that change from C/C++...I mean the | and || changes... X|

                  I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

                  F Offline
                  F Offline
                  Forogar
                  wrote on last edited by
                  #26

                  This isn't a change from C++. It works the same way for both operators. Doesn't it? Now I'm going to have to read up on it, dammit!

                  - I would love to change the world, but they won’t give me the source code.

                  Kornfeld Eliyahu PeterK 1 Reply Last reply
                  0
                  • B BobJanova

                    There's actually some nice concise uses of

                    var result = DoSomething() && DoSomethingThatDependsOnIt();
                    var result = DoSomething() || HandleFailureCase();

                    It's even better in languages where you can use non-boolean types with the boolean operators.

                    F Offline
                    F Offline
                    Forogar
                    wrote on last edited by
                    #27

                    Ouch! && Ouch! || Ouch!

                    - I would love to change the world, but they won’t give me the source code.

                    1 Reply Last reply
                    0
                    • M Marc Clifton

                      Programming Quiz of the day. I just wrote this code (C#), which did something very unexpected. What was it that it unexpectedly did?

                      		bool more = ProcessFlyouts();
                      		more = more || ProcessCarrierAnimations();
                      

                      How would you change it to "do the right thing?" Marc

                      P Offline
                      P Offline
                      Pete OHanlon
                      wrote on last edited by
                      #28

                      Now, I'm not going to look at the other answers before I post so I don't know if others have got it right, or if there are additional nuggets of information. If ProcessFlyouts returns true then the second test isn't carried out - it's a conditional OR statement. So, if you want ProcessCarrierAnimations to be evaluated, convert it to

                      more = more | ProcessCarrierAnimations();

                      1 Reply Last reply
                      0
                      • F Forogar

                        This isn't a change from C++. It works the same way for both operators. Doesn't it? Now I'm going to have to read up on it, dammit!

                        - I would love to change the world, but they won’t give me the source code.

                        Kornfeld Eliyahu PeterK Offline
                        Kornfeld Eliyahu PeterK Offline
                        Kornfeld Eliyahu Peter
                        wrote on last edited by
                        #29

                        You have to! Otherwise you may end up with some mess if updating C/C++ to C# (what I'm doing just now)...

                        I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

                        "It never ceases to amaze me that a spacecraft launched in 1977 can be fixed remotely from Earth." ― Brian Cox

                        F 1 Reply Last reply
                        0
                        • K Keith Barrow

                          Though Nish's and OG's examples will work, I think it is symantically better to do this:

                          bool more = ProcessFlyouts();
                          bool foo = ProcessCarrierAnimations();
                          more = more || foo;

                          Less terse code (normally bad) - but explicit in calling ProcessCarrierAnimations.

                          PB 369,783 wrote:

                          I just find him very unlikeable, and I think the way he looks like a prettier version of his Mum is very disturbing.[^]

                          P Offline
                          P Offline
                          PIEBALDconsult
                          wrote on last edited by
                          #30

                          "Eliminate needless local variables." :-D

                          You'll never get very far if all you do is follow instructions.

                          1 Reply Last reply
                          0
                          • R Rage

                            MISRA[^] Rule 33 & 34:

                            The right hand operand of a || shall not contain side effects
                            The operands of a logical || shall be primary expressions

                            The example you gave is the very reason for the above two rules.

                            ~RaGE();

                            I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus Entropy isn't what it used to.

                            P Offline
                            P Offline
                            PIEBALDconsult
                            wrote on last edited by
                            #31

                            I never follow other peoples' rules. :cool:

                            You'll never get very far if all you do is follow instructions.

                            S 1 Reply Last reply
                            0
                            • Kornfeld Eliyahu PeterK Kornfeld Eliyahu Peter

                              You have to! Otherwise you may end up with some mess if updating C/C++ to C# (what I'm doing just now)...

                              I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

                              F Offline
                              F Offline
                              Forogar
                              wrote on last edited by
                              #32

                              Nah! As long as it compiles...

                              - I would love to change the world, but they won’t give me the source code.

                              Kornfeld Eliyahu PeterK 1 Reply Last reply
                              0
                              • F Forogar

                                Nah! As long as it compiles...

                                - I would love to change the world, but they won’t give me the source code.

                                Kornfeld Eliyahu PeterK Offline
                                Kornfeld Eliyahu PeterK Offline
                                Kornfeld Eliyahu Peter
                                wrote on last edited by
                                #33

                                Yeah! It compiles. After then you can rub your head to find where the bug is!

                                I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

                                "It never ceases to amaze me that a spacecraft launched in 1977 can be fixed remotely from Earth." ― Brian Cox

                                J 1 Reply Last reply
                                0
                                • M Marc Clifton

                                  Programming Quiz of the day. I just wrote this code (C#), which did something very unexpected. What was it that it unexpectedly did?

                                  		bool more = ProcessFlyouts();
                                  		more = more || ProcessCarrierAnimations();
                                  

                                  How would you change it to "do the right thing?" Marc

                                  Richard Andrew x64R Offline
                                  Richard Andrew x64R Offline
                                  Richard Andrew x64
                                  wrote on last edited by
                                  #34

                                  How about:

                                  more &= ProcessCarrierAnimations();

                                  The difficult we do right away... ...the impossible takes slightly longer.

                                  1 Reply Last reply
                                  0
                                  • M Marc Clifton

                                    Programming Quiz of the day. I just wrote this code (C#), which did something very unexpected. What was it that it unexpectedly did?

                                    		bool more = ProcessFlyouts();
                                    		more = more || ProcessCarrierAnimations();
                                    

                                    How would you change it to "do the right thing?" Marc

                                    J Offline
                                    J Offline
                                    Jorgen Andersson
                                    wrote on last edited by
                                    #35

                                    Is it just me that would have done it as a oneliner?

                                    Wrong is evil and must be defeated. - Jeff Ello[^]

                                    P 1 Reply Last reply
                                    0
                                    • J Jorgen Andersson

                                      Is it just me that would have done it as a oneliner?

                                      Wrong is evil and must be defeated. - Jeff Ello[^]

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

                                      That could make setting a breakpoint on the second call difficult. :shrug:

                                      You'll never get very far if all you do is follow instructions.

                                      J 1 Reply Last reply
                                      0
                                      • P PIEBALDconsult

                                        That could make setting a breakpoint on the second call difficult. :shrug:

                                        You'll never get very far if all you do is follow instructions.

                                        J Offline
                                        J Offline
                                        Jorgen Andersson
                                        wrote on last edited by
                                        #37

                                        No big deal to change if necessary. :shrug: But I actually find it easier to read on one line.

                                        Wrong is evil and must be defeated. - Jeff Ello[^]

                                        1 Reply Last reply
                                        0
                                        • M Marc Clifton

                                          Programming Quiz of the day. I just wrote this code (C#), which did something very unexpected. What was it that it unexpectedly did?

                                          		bool more = ProcessFlyouts();
                                          		more = more || ProcessCarrierAnimations();
                                          

                                          How would you change it to "do the right thing?" Marc

                                          E Offline
                                          E Offline
                                          Ennis Ray Lynch Jr
                                          wrote on last edited by
                                          #38

                                          -|

                                          Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost "All users always want Excel" --Ennis Lynch

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