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  4. Pass by value and pass by reference

Pass by value and pass by reference

Scheduled Pinned Locked Moved The Weird and The Wonderful
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  • S Sherin Iranimose

    namespace SampleCSharp { public class MyClass { public int myVar; } public class SampleClass { private void SampleClass_Load(object sender, EventArgs e) { MyClass objMyClass = new MyClass(); objMyClass.myVar = 10; ChangeMyVar(objMyClass);//**IS THIS PASS BY VALUE OR PASS BY REFERENCE** } public void ChangeMyVar(MyClass objMyClass) { objMyClass.myVar = 30; } } }

    EVEN THE WORD IMPOSSIBLE SAYS I M POSSIBLE.

    P Offline
    P Offline
    Pete OHanlon
    wrote on last edited by
    #3

    It's passed by the lower intestinal tract.

    Deja View - the feeling that you've seen this post before.

    My blog | My articles

    B M 2 Replies Last reply
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    • P Pete OHanlon

      It's passed by the lower intestinal tract.

      Deja View - the feeling that you've seen this post before.

      My blog | My articles

      B Offline
      B Offline
      Big Daddy Farang
      wrote on last edited by
      #4

      Ah, so it is by value.

      BDF A learned fool is more a fool than an ignorant fool. -- Moliere

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      • B Big Daddy Farang

        Ah, so it is by value.

        BDF A learned fool is more a fool than an ignorant fool. -- Moliere

        C Offline
        C Offline
        Chris Meech
        wrote on last edited by
        #5

        I think by volume. :)

        Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]

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        • C Chris Meech

          I think by volume. :)

          Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]

          B Offline
          B Offline
          Big Daddy Farang
          wrote on last edited by
          #6

          Although not one of the choices in the original post, I think it's a good answer given that the OP is a load of, umm, excrement.

          BDF A learned fool is more a fool than an ignorant fool. -- Moliere

          1 Reply Last reply
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          • S Sherin Iranimose

            namespace SampleCSharp { public class MyClass { public int myVar; } public class SampleClass { private void SampleClass_Load(object sender, EventArgs e) { MyClass objMyClass = new MyClass(); objMyClass.myVar = 10; ChangeMyVar(objMyClass);//**IS THIS PASS BY VALUE OR PASS BY REFERENCE** } public void ChangeMyVar(MyClass objMyClass) { objMyClass.myVar = 30; } } }

            EVEN THE WORD IMPOSSIBLE SAYS I M POSSIBLE.

            P Offline
            P Offline
            Paul Conrad
            wrote on last edited by
            #7

            What's the point of your post? :|

            "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

            S 1 Reply Last reply
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            • C Chris Meech

              I think by volume. :)

              Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]

              P Offline
              P Offline
              Paul Conrad
              wrote on last edited by
              #8

              Chris Meech wrote:

              think by volume.

              ...and alot of it too :laugh:

              "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

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              • M Maximilien

                by value.

                This signature was proudly tested on animals.

                S Offline
                S Offline
                Sherin Iranimose
                wrote on last edited by
                #9

                So If I print the value anywhere inside the Load function will only print 10. But it is not.... Its 30 after function call.

                EVEN THE WORD IMPOSSIBLE SAYS I M POSSIBLE. How to post a question

                B 1 Reply Last reply
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                • P Paul Conrad

                  What's the point of your post? :|

                  "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

                  S Offline
                  S Offline
                  Sherin Iranimose
                  wrote on last edited by
                  #10

                  After the function call its printing 30, That is the matter :)

                  EVEN THE WORD IMPOSSIBLE SAYS I M POSSIBLE. How to post a question

                  D P 2 Replies Last reply
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                  • B Big Daddy Farang

                    Ah, so it is by value.

                    BDF A learned fool is more a fool than an ignorant fool. -- Moliere

                    S Offline
                    S Offline
                    Sherin Iranimose
                    wrote on last edited by
                    #11

                    by the lower intestinal tract.

                    Then how its by value??? Once its passed, you wont get the original....... :laugh:

                    EVEN THE WORD IMPOSSIBLE SAYS I M POSSIBLE. How to post a question

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                    • S Sherin Iranimose

                      After the function call its printing 30, That is the matter :)

                      EVEN THE WORD IMPOSSIBLE SAYS I M POSSIBLE. How to post a question

                      D Offline
                      D Offline
                      darkelv
                      wrote on last edited by
                      #12

                      Sherin Iranimose wrote:

                      After the function call its printing 30

                      So, that's the horror part? *look at forum title* *Disappointed*

                      1 Reply Last reply
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                      • S Sherin Iranimose

                        namespace SampleCSharp { public class MyClass { public int myVar; } public class SampleClass { private void SampleClass_Load(object sender, EventArgs e) { MyClass objMyClass = new MyClass(); objMyClass.myVar = 10; ChangeMyVar(objMyClass);//**IS THIS PASS BY VALUE OR PASS BY REFERENCE** } public void ChangeMyVar(MyClass objMyClass) { objMyClass.myVar = 30; } } }

                        EVEN THE WORD IMPOSSIBLE SAYS I M POSSIBLE.

                        V Offline
                        V Offline
                        V 0
                        wrote on last edited by
                        #13

                        this looks like a programming question. On top of this forum it's said in big bold red letters: Do not post programming questions in this forum... If it is a question, move it to the C# forum. Btw: objects (including strings) are passed by reference to my knowledge. You should be able to find this on msdn somewhere.

                        V.
                        Stop smoking so you can: Enjoy longer the money you save. Moviereview Archive

                        CPalliniC 1 Reply Last reply
                        0
                        • V V 0

                          this looks like a programming question. On top of this forum it's said in big bold red letters: Do not post programming questions in this forum... If it is a question, move it to the C# forum. Btw: objects (including strings) are passed by reference to my knowledge. You should be able to find this on msdn somewhere.

                          V.
                          Stop smoking so you can: Enjoy longer the money you save. Moviereview Archive

                          CPalliniC Offline
                          CPalliniC Offline
                          CPallini
                          wrote on last edited by
                          #14

                          V. wrote:

                          objects (including strings) are passed by reference to my knowledge

                          Nope. All parameters are passed by value. you should use the ref keyword to pass a parameter by reference. BTW: passing by value an object implies that called function can actually change object's internal 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]

                          In testa che avete, signor di Ceprano?

                          J 1 Reply Last reply
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                          • S Sherin Iranimose

                            After the function call its printing 30, That is the matter :)

                            EVEN THE WORD IMPOSSIBLE SAYS I M POSSIBLE. How to post a question

                            P Offline
                            P Offline
                            Paul Conrad
                            wrote on last edited by
                            #15

                            For some reason, I sense you are asking a programming question. That is a big NO in this particular forum.

                            "The clue train passed his station without stopping." - John Simmons / outlaw programmer "Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

                            1 Reply Last reply
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                            • S Sherin Iranimose

                              namespace SampleCSharp { public class MyClass { public int myVar; } public class SampleClass { private void SampleClass_Load(object sender, EventArgs e) { MyClass objMyClass = new MyClass(); objMyClass.myVar = 10; ChangeMyVar(objMyClass);//**IS THIS PASS BY VALUE OR PASS BY REFERENCE** } public void ChangeMyVar(MyClass objMyClass) { objMyClass.myVar = 30; } } }

                              EVEN THE WORD IMPOSSIBLE SAYS I M POSSIBLE.

                              J Offline
                              J Offline
                              Joe Woodbury
                              wrote on last edited by
                              #16

                              This appears to be C# code. Classes are passed by reference by design.

                              Anyone who thinks he has a better idea of what's good for people than people do is a swine. - P.J. O'Rourke

                              1 Reply Last reply
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                              • CPalliniC CPallini

                                V. wrote:

                                objects (including strings) are passed by reference to my knowledge

                                Nope. All parameters are passed by value. you should use the ref keyword to pass a parameter by reference. BTW: passing by value an object implies that called function can actually change object's internal 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]

                                J Offline
                                J Offline
                                Joe Woodbury
                                wrote on last edited by
                                #17

                                This is incorrect. Classes are passed by reference, Structs are passed by value.

                                CPallini wrote:

                                BTW: passing by value an object implies that called function can actually change object's internal state. [Smile]

                                This means nothing of the sort. Passing by value simply means that an object in a method is distinct from the original object and any changes made to that object are not reflected in the original.

                                Anyone who thinks he has a better idea of what's good for people than people do is a swine. - P.J. O'Rourke

                                CPalliniC 1 Reply Last reply
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                                • J Joe Woodbury

                                  This is incorrect. Classes are passed by reference, Structs are passed by value.

                                  CPallini wrote:

                                  BTW: passing by value an object implies that called function can actually change object's internal state. [Smile]

                                  This means nothing of the sort. Passing by value simply means that an object in a method is distinct from the original object and any changes made to that object are not reflected in the original.

                                  Anyone who thinks he has a better idea of what's good for people than people do is a swine. - P.J. O'Rourke

                                  CPalliniC Offline
                                  CPalliniC Offline
                                  CPallini
                                  wrote on last edited by
                                  #18

                                  You are wrong. Whenever you pass an object, a reference to the object's instance is passed by value. :)

                                  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]

                                  In testa che avete, signor di Ceprano?

                                  1 Reply Last reply
                                  0
                                  • S Sherin Iranimose

                                    namespace SampleCSharp { public class MyClass { public int myVar; } public class SampleClass { private void SampleClass_Load(object sender, EventArgs e) { MyClass objMyClass = new MyClass(); objMyClass.myVar = 10; ChangeMyVar(objMyClass);//**IS THIS PASS BY VALUE OR PASS BY REFERENCE** } public void ChangeMyVar(MyClass objMyClass) { objMyClass.myVar = 30; } } }

                                    EVEN THE WORD IMPOSSIBLE SAYS I M POSSIBLE.

                                    K Offline
                                    K Offline
                                    KarstenK
                                    wrote on last edited by
                                    #19

                                    I guess it gets passed by reference because it is C#. :rolleyes: In C++ by value.

                                    Greetings from Germany

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                                    • S Sherin Iranimose

                                      namespace SampleCSharp { public class MyClass { public int myVar; } public class SampleClass { private void SampleClass_Load(object sender, EventArgs e) { MyClass objMyClass = new MyClass(); objMyClass.myVar = 10; ChangeMyVar(objMyClass);//**IS THIS PASS BY VALUE OR PASS BY REFERENCE** } public void ChangeMyVar(MyClass objMyClass) { objMyClass.myVar = 30; } } }

                                      EVEN THE WORD IMPOSSIBLE SAYS I M POSSIBLE.

                                      M Offline
                                      M Offline
                                      Mitendra Anand
                                      wrote on last edited by
                                      #20

                                      Value-type objects such as structs are created on the stack, while reference-type objects such as classes are created on the heap. So it is actually a PASS - BY - REFERENCE Both types of objects are destroyed automatically, but objects based on value types are destroyed when they go out of scope, whereas objects based on reference types are destroyed at an unspecified time after the last reference to them is removed. Happy Coding! Mitendra

                                      J 1 Reply Last reply
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                                      • P Pete OHanlon

                                        It's passed by the lower intestinal tract.

                                        Deja View - the feeling that you've seen this post before.

                                        My blog | My articles

                                        M Offline
                                        M Offline
                                        Muigai Mwaura
                                        wrote on last edited by
                                        #21

                                        I'm cracking up :laugh: I'm shedding tears :(( the people I work with are looking at me like I'm crazy.

                                        1 Reply Last reply
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                                        • M Mitendra Anand

                                          Value-type objects such as structs are created on the stack, while reference-type objects such as classes are created on the heap. So it is actually a PASS - BY - REFERENCE Both types of objects are destroyed automatically, but objects based on value types are destroyed when they go out of scope, whereas objects based on reference types are destroyed at an unspecified time after the last reference to them is removed. Happy Coding! Mitendra

                                          J Offline
                                          J Offline
                                          jon_175
                                          wrote on last edited by
                                          #22

                                          The object is passed by value, but the what is actually passed since it is a reference object is a pointer to the object. So, the "value" that is actually passed is the pointer not the object and therefore any changes made through the pointer change the original object. What you can't change is the pointer itself. That is the "value". :)

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