Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • World
  • Users
  • Groups
Skins
  • Light
  • Cerulean
  • Cosmo
  • Flatly
  • Journal
  • Litera
  • Lumen
  • Lux
  • Materia
  • Minty
  • Morph
  • Pulse
  • Sandstone
  • Simplex
  • Sketchy
  • Spacelab
  • United
  • Yeti
  • Zephyr
  • Dark
  • Cyborg
  • Darkly
  • Quartz
  • Slate
  • Solar
  • Superhero
  • Vapor

  • Default (No Skin)
  • No Skin
Collapse
Code Project
  1. Home
  2. The Lounge
  3. So how well do you think you know C#?

So how well do you think you know C#?

Scheduled Pinned Locked Moved The Lounge
csharpphpvisual-studiocomquestion
37 Posts 20 Posters 0 Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • L leppie

    Without compiling the following code, what will be the result, if run?

    class Program
    {
    static void Main(string[] args)
    {
    object r = Foo(true);
    Console.WriteLine(r.GetType());
    Console.ReadLine();
    }

    static object Foo(bool e)
    {
    return e ? 0 : 0.0;
    }
    }

    Now compile and run the code? Are you surprised? If so, try figure it out, if not, then kudos to you :)

    xacc.ide - now with TabsToSpaces support
    IronScheme - 1.0 alpha 4a out now (29 May 2008)

    M Offline
    M Offline
    Mustafa Ismail Mustafa
    wrote on last edited by
    #7

    double, and I'd be surprised if it were anything else...

    Don't forget to vote if the response was helpful


    Sig history "dad" Ishmail-Samuel Mustafa "You're an idiot." John Simmons, THE Outlaw programmer "I realised that all of my best anecdotes started with "So there we were, pissed". Pete O'Hanlon Unix is a Four Letter Word, and Vi is a Two Letter Abbreviation

    S G 2 Replies Last reply
    0
    • J Jorgen Sigvardsson

      Smart? Nah, I give experience credit for this. Also, if you think about it, it has to be this way. Numbers aren't that different from objects in OOP. I think this code makes it more apparent: (boolval ? new Car() : new AirPlane()).Fly();Since C# is statically typed, method selection can't be left to runtime binding. :)

      L Offline
      L Offline
      leppie
      wrote on last edited by
      #8

      It could have bound to object :|

      xacc.ide - now with TabsToSpaces support
      IronScheme - 1.0 alpha 4a out now (29 May 2008)

      1 Reply Last reply
      0
      • M Mustafa Ismail Mustafa

        double, and I'd be surprised if it were anything else...

        Don't forget to vote if the response was helpful


        Sig history "dad" Ishmail-Samuel Mustafa "You're an idiot." John Simmons, THE Outlaw programmer "I realised that all of my best anecdotes started with "So there we were, pissed". Pete O'Hanlon Unix is a Four Letter Word, and Vi is a Two Letter Abbreviation

        S Offline
        S Offline
        Simone Busoli
        wrote on last edited by
        #9

        Extremely useful

        Simone Busoli

        M 1 Reply Last reply
        0
        • S Simone Busoli

          Extremely useful

          Simone Busoli

          M Offline
          M Offline
          Mustafa Ismail Mustafa
          wrote on last edited by
          #10

          in what sense? :confused:

          Don't forget to vote if the response was helpful


          Sig history "dad" Ishmail-Samuel Mustafa "You're an idiot." John Simmons, THE Outlaw programmer "I realised that all of my best anecdotes started with "So there we were, pissed". Pete O'Hanlon Unix is a Four Letter Word, and Vi is a Two Letter Abbreviation

          J 1 Reply Last reply
          0
          • M Mustafa Ismail Mustafa

            in what sense? :confused:

            Don't forget to vote if the response was helpful


            Sig history "dad" Ishmail-Samuel Mustafa "You're an idiot." John Simmons, THE Outlaw programmer "I realised that all of my best anecdotes started with "So there we were, pissed". Pete O'Hanlon Unix is a Four Letter Word, and Vi is a Two Letter Abbreviation

            J Offline
            J Offline
            Jorgen Sigvardsson
            wrote on last edited by
            #11

            Your sig... ;)

            M 1 Reply Last reply
            0
            • J Jorgen Sigvardsson

              Your sig... ;)

              M Offline
              M Offline
              Mustafa Ismail Mustafa
              wrote on last edited by
              #12

              :doh: :laugh:

              Don't forget to vote if the response was helpful


              Sig history "dad" Ishmail-Samuel Mustafa "You're an idiot." John Simmons, THE Outlaw programmer "I realised that all of my best anecdotes started with "So there we were, pissed". Pete O'Hanlon Unix is a Four Letter Word, and Vi is a Two Letter Abbreviation

              1 Reply Last reply
              0
              • M Mustafa Ismail Mustafa

                double, and I'd be surprised if it were anything else...

                Don't forget to vote if the response was helpful


                Sig history "dad" Ishmail-Samuel Mustafa "You're an idiot." John Simmons, THE Outlaw programmer "I realised that all of my best anecdotes started with "So there we were, pissed". Pete O'Hanlon Unix is a Four Letter Word, and Vi is a Two Letter Abbreviation

                G Offline
                G Offline
                Gary Wheeler
                wrote on last edited by
                #13

                Mustafa Ismail Mustafa wrote:

                double, and I'd be surprised if it were anything else...

                double, and I'd be surprised pissed off if it were anything else... (I'm in the process of learning C#)

                Software Zen: delete this;

                M 1 Reply Last reply
                0
                • L leppie

                  Without compiling the following code, what will be the result, if run?

                  class Program
                  {
                  static void Main(string[] args)
                  {
                  object r = Foo(true);
                  Console.WriteLine(r.GetType());
                  Console.ReadLine();
                  }

                  static object Foo(bool e)
                  {
                  return e ? 0 : 0.0;
                  }
                  }

                  Now compile and run the code? Are you surprised? If so, try figure it out, if not, then kudos to you :)

                  xacc.ide - now with TabsToSpaces support
                  IronScheme - 1.0 alpha 4a out now (29 May 2008)

                  R Offline
                  R Offline
                  Rajesh R Subramanian
                  wrote on last edited by
                  #14

                  How do you get formatted and colorised code like that? Is there a tool or something? Do you mind sharing it with me? :)

                  Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche .·´¯`·->Rajesh<-·´¯`·. [Microsoft MVP - Visual C++]

                  L 1 Reply Last reply
                  0
                  • R Rajesh R Subramanian

                    How do you get formatted and colorised code like that? Is there a tool or something? Do you mind sharing it with me? :)

                    Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche .·´¯`·->Rajesh<-·´¯`·. [Microsoft MVP - Visual C++]

                    L Offline
                    L Offline
                    leppie
                    wrote on last edited by
                    #15

                    Rajesh R Subramanian wrote:

                    How do you get formatted and colorised code like that? Is there a tool or something? Do you mind sharing it with me?

                    xacc.ide*, select text, right click, copy special, copy to HTML :) * see link below

                    xacc.ide - now with TabsToSpaces support
                    IronScheme - 1.0 alpha 4a out now (29 May 2008)

                    R 1 Reply Last reply
                    0
                    • L leppie

                      Rajesh R Subramanian wrote:

                      How do you get formatted and colorised code like that? Is there a tool or something? Do you mind sharing it with me?

                      xacc.ide*, select text, right click, copy special, copy to HTML :) * see link below

                      xacc.ide - now with TabsToSpaces support
                      IronScheme - 1.0 alpha 4a out now (29 May 2008)

                      R Offline
                      R Offline
                      Rajesh R Subramanian
                      wrote on last edited by
                      #16

                      It works with C++? Will I be able to specify a background color of my option? I know that I can modify the HTML, but I'm just asking. I'm downloading it at the moment. Thanks.

                      Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche .·´¯`·->Rajesh<-·´¯`·. [Microsoft MVP - Visual C++]

                      L 1 Reply Last reply
                      0
                      • R Rajesh R Subramanian

                        It works with C++? Will I be able to specify a background color of my option? I know that I can modify the HTML, but I'm just asking. I'm downloading it at the moment. Thanks.

                        Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche .·´¯`·->Rajesh<-·´¯`·. [Microsoft MVP - Visual C++]

                        L Offline
                        L Offline
                        leppie
                        wrote on last edited by
                        #17

                        Rajesh R Subramanian wrote:

                        It works with C++?

                        Not as nice as C#, but ok :)

                        Rajesh R Subramanian wrote:

                        Will I be able to specify a background color of my option? I know that I can modify the HTML, but I'm just asking.

                        Nope, not IIRC, it just defaults to white, I cant remember if it picks up the color from the editor, or if that color can even be changed! Been very long since I wrote that :)

                        xacc.ide - now with TabsToSpaces support
                        IronScheme - 1.0 alpha 4a out now (29 May 2008)

                        R 1 Reply Last reply
                        0
                        • L leppie

                          Rajesh R Subramanian wrote:

                          It works with C++?

                          Not as nice as C#, but ok :)

                          Rajesh R Subramanian wrote:

                          Will I be able to specify a background color of my option? I know that I can modify the HTML, but I'm just asking.

                          Nope, not IIRC, it just defaults to white, I cant remember if it picks up the color from the editor, or if that color can even be changed! Been very long since I wrote that :)

                          xacc.ide - now with TabsToSpaces support
                          IronScheme - 1.0 alpha 4a out now (29 May 2008)

                          R Offline
                          R Offline
                          Rajesh R Subramanian
                          wrote on last edited by
                          #18

                          I might give it a shot to add those features of my choice if time permits. I hardly work with C#. Thanks for the tool anyways.

                          Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche .·´¯`·->Rajesh<-·´¯`·. [Microsoft MVP - Visual C++]

                          1 Reply Last reply
                          0
                          • L leppie

                            Without compiling the following code, what will be the result, if run?

                            class Program
                            {
                            static void Main(string[] args)
                            {
                            object r = Foo(true);
                            Console.WriteLine(r.GetType());
                            Console.ReadLine();
                            }

                            static object Foo(bool e)
                            {
                            return e ? 0 : 0.0;
                            }
                            }

                            Now compile and run the code? Are you surprised? If so, try figure it out, if not, then kudos to you :)

                            xacc.ide - now with TabsToSpaces support
                            IronScheme - 1.0 alpha 4a out now (29 May 2008)

                            S Offline
                            S Offline
                            SomeGuyThatIsMe
                            wrote on last edited by
                            #19

                            i say double, but one of our new devs, thought it was a bool, then an object, then gave up and had me explain it. person has the same title as me too, funny how i never cared about that stuff until i got one. hopefully the other new guy will do better.

                            Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good.

                            1 Reply Last reply
                            0
                            • G Gary Wheeler

                              Mustafa Ismail Mustafa wrote:

                              double, and I'd be surprised if it were anything else...

                              double, and I'd be surprised pissed off if it were anything else... (I'm in the process of learning C#)

                              Software Zen: delete this;

                              M Offline
                              M Offline
                              Mustafa Ismail Mustafa
                              wrote on last edited by
                              #20

                              Gary Wheeler wrote:

                              double, and I'd be surprised pissed off if it were anything else...

                              I stand corrected :)

                              Gary Wheeler wrote:

                              (I'm in the process of learning C#)

                              From what I remember, you're a C++er. Don't worry, you'll pick it up in no time flat, but you'll hate some stuff. const comes as a[n unpleasant] surprise and so do reflection issues. All in all, its a nice language :)

                              Don't forget to vote if the response was helpful


                              Sig history "dad" Ishmail-Samuel Mustafa "You're an idiot." John Simmons, THE Outlaw programmer "I realised that all of my best anecdotes started with "So there we were, pissed". Pete O'Hanlon Unix is a Four Letter Word, and Vi is a Two Letter Abbreviation

                              G 1 Reply Last reply
                              0
                              • L leppie

                                Without compiling the following code, what will be the result, if run?

                                class Program
                                {
                                static void Main(string[] args)
                                {
                                object r = Foo(true);
                                Console.WriteLine(r.GetType());
                                Console.ReadLine();
                                }

                                static object Foo(bool e)
                                {
                                return e ? 0 : 0.0;
                                }
                                }

                                Now compile and run the code? Are you surprised? If so, try figure it out, if not, then kudos to you :)

                                xacc.ide - now with TabsToSpaces support
                                IronScheme - 1.0 alpha 4a out now (29 May 2008)

                                P Offline
                                P Offline
                                piyush7419820
                                wrote on last edited by
                                #21

                                it will throw null exception.

                                1 Reply Last reply
                                0
                                • M Mustafa Ismail Mustafa

                                  Gary Wheeler wrote:

                                  double, and I'd be surprised pissed off if it were anything else...

                                  I stand corrected :)

                                  Gary Wheeler wrote:

                                  (I'm in the process of learning C#)

                                  From what I remember, you're a C++er. Don't worry, you'll pick it up in no time flat, but you'll hate some stuff. const comes as a[n unpleasant] surprise and so do reflection issues. All in all, its a nice language :)

                                  Don't forget to vote if the response was helpful


                                  Sig history "dad" Ishmail-Samuel Mustafa "You're an idiot." John Simmons, THE Outlaw programmer "I realised that all of my best anecdotes started with "So there we were, pissed". Pete O'Hanlon Unix is a Four Letter Word, and Vi is a Two Letter Abbreviation

                                  G Offline
                                  G Offline
                                  Gary Wheeler
                                  wrote on last edited by
                                  #22

                                  Mustafa Ismail Mustafa wrote:

                                  From what I remember, you're a C++er.

                                  Yes indeed. My portion of our next product (the UI) will be written in C#, since we have a requirement to use some WPF controls supplied by another group. Now, I've got a couple thousand pages of books to read to get started :).

                                  Software Zen: delete this;

                                  1 Reply Last reply
                                  0
                                  • L leppie

                                    Without compiling the following code, what will be the result, if run?

                                    class Program
                                    {
                                    static void Main(string[] args)
                                    {
                                    object r = Foo(true);
                                    Console.WriteLine(r.GetType());
                                    Console.ReadLine();
                                    }

                                    static object Foo(bool e)
                                    {
                                    return e ? 0 : 0.0;
                                    }
                                    }

                                    Now compile and run the code? Are you surprised? If so, try figure it out, if not, then kudos to you :)

                                    xacc.ide - now with TabsToSpaces support
                                    IronScheme - 1.0 alpha 4a out now (29 May 2008)

                                    P Offline
                                    P Offline
                                    PIEBALDconsult
                                    wrote on last edited by
                                    #23

                                    Yeah, makes sense to me, the ternary operator isn't allowed to return different types, so the int is implicitly cast to double, just as expected. Of course I had to add System. to the Console methods to get it to compile...

                                    B C 2 Replies Last reply
                                    0
                                    • P PIEBALDconsult

                                      Yeah, makes sense to me, the ternary operator isn't allowed to return different types, so the int is implicitly cast to double, just as expected. Of course I had to add System. to the Console methods to get it to compile...

                                      B Offline
                                      B Offline
                                      BoneSoft
                                      wrote on last edited by
                                      #24

                                      Personally, I'm always using my System. ;P


                                      Visit BoneSoft.com for code generation tools (XML & XSD -> C#, VB, etc...) and some free developer tools as well.

                                      1 Reply Last reply
                                      0
                                      • J Jorgen Sigvardsson

                                        Smart? Nah, I give experience credit for this. Also, if you think about it, it has to be this way. Numbers aren't that different from objects in OOP. I think this code makes it more apparent: (boolval ? new Car() : new AirPlane()).Fly();Since C# is statically typed, method selection can't be left to runtime binding. :)

                                        A Offline
                                        A Offline
                                        Artiom Chilaru
                                        wrote on last edited by
                                        #25

                                        In this case to be able to compile it you'll have to manually cast both objects to a base class, that has a Fly() methods :) While in the example of "? 0 : 0.0" the compiler does implicit casting

                                        1 Reply Last reply
                                        0
                                        • L leppie

                                          Without compiling the following code, what will be the result, if run?

                                          class Program
                                          {
                                          static void Main(string[] args)
                                          {
                                          object r = Foo(true);
                                          Console.WriteLine(r.GetType());
                                          Console.ReadLine();
                                          }

                                          static object Foo(bool e)
                                          {
                                          return e ? 0 : 0.0;
                                          }
                                          }

                                          Now compile and run the code? Are you surprised? If so, try figure it out, if not, then kudos to you :)

                                          xacc.ide - now with TabsToSpaces support
                                          IronScheme - 1.0 alpha 4a out now (29 May 2008)

                                          C Offline
                                          C Offline
                                          cepi69
                                          wrote on last edited by
                                          #26

                                          I would suggest you to read the "CLR via C#" book, by Jeffery Richter. ;P

                                          1 Reply Last reply
                                          0
                                          Reply
                                          • Reply as topic
                                          Log in to reply
                                          • Oldest to Newest
                                          • Newest to Oldest
                                          • Most Votes


                                          • Login

                                          • Don't have an account? Register

                                          • Login or register to search.
                                          • First post
                                            Last post
                                          0
                                          • Categories
                                          • Recent
                                          • Tags
                                          • Popular
                                          • World
                                          • Users
                                          • Groups