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Strong Typing

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  • J John R Shaw

    What are you talking about? If you are talking about variable type checking in C++, then you are wrong. I wish C was as tight with its type checking. Then again I wish C would allow me to declare a variable where ever I wanted too, instead of forcing me to create a new scope. P.S. I liked C, but I love C++.

    INTP "Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

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    Tristan Rhodes
    wrote on last edited by
    #28

    Actualy it arose from some code i wrote in .Net. I wrapped a generic HttpSession collection in something that exposed typed properties for each of the items it contained, And was told it was a total waste of my time. T

    ------------------------------- Carrier Bags - 21st Century Tumbleweed.

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    • T Tristan Rhodes

      Actualy it arose from some code i wrote in .Net. I wrapped a generic HttpSession collection in something that exposed typed properties for each of the items it contained, And was told it was a total waste of my time. T

      ------------------------------- Carrier Bags - 21st Century Tumbleweed.

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      Marcus J Smith
      wrote on last edited by
      #29

      Tristan Rhodes wrote:

      And was told it was a total waste of my time.

      Why?


      CleaKO

      "I think you'll be okay here, they have a thin candy shell. 'Surprised you didn't know that.'" - Tommy (Tommy Boy)
      "Fill it up again! Fill it up again! Once it hits your lips, it's so good!" - Frank the Tank (Old School)

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      • M Marcus J Smith

        Tristan Rhodes wrote:

        And was told it was a total waste of my time.

        Why?


        CleaKO

        "I think you'll be okay here, they have a thin candy shell. 'Surprised you didn't know that.'" - Tommy (Tommy Boy)
        "Fill it up again! Fill it up again! Once it hits your lips, it's so good!" - Frank the Tank (Old School)

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        Tristan Rhodes
        wrote on last edited by
        #30

        Because the general concencus was that "It's the most pointless piece of code" they had ever seen. :S

        ------------------------------- Carrier Bags - 21st Century Tumbleweed.

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        • T Tristan Rhodes

          Because the general concencus was that "It's the most pointless piece of code" they had ever seen. :S

          ------------------------------- Carrier Bags - 21st Century Tumbleweed.

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          PIEBALDconsult
          wrote on last edited by
          #31

          I'd have to see the code.

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          • P PIEBALDconsult

            John R. Shaw wrote:

            Then again I wish C would allow me to declare a variable where ever I wanted

            I prefer to have all the declarations in one place (the top) so in C# I still do that by choice. But requiring such isn't very friendly, flexibility is good.

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            Chris Maunder
            wrote on last edited by
            #32

            ewwww! Declare the variables as close to their first use as possible. I have spoken.

            cheers, Chris Maunder

            CodeProject.com : C++ MVP

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            • T Tristan Rhodes

              Because the general concencus was that "It's the most pointless piece of code" they had ever seen. :S

              ------------------------------- Carrier Bags - 21st Century Tumbleweed.

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              Marcus J Smith
              wrote on last edited by
              #33

              Maybe it was just the code. Strong typing is a good way to control up front what type of information you are looking for rather than waiting for it to hit the database or a flat file and finding out later it isnt what it should be.


              CleaKO

              "I think you'll be okay here, they have a thin candy shell. 'Surprised you didn't know that.'" - Tommy (Tommy Boy)
              "Fill it up again! Fill it up again! Once it hits your lips, it's so good!" - Frank the Tank (Old School)

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              • P PIEBALDconsult

                I'd have to see the code.

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                Tristan Rhodes
                wrote on last edited by
                #34

                public class SessionWrapper { private HttpSessionState session; // Constants public SessionWrapper() { session = HttpContext.Current.Session; } public string UserName { get{return (string)session[SE_USER_NAME];} set{session[SE_USER_NAME] = value;} } public int? LastPurchase { get{return (int?)session[SE_LAST_PURCHASE];} set{session[SE_LAST_PURCHASE] = value;} } // Etc } I'm actualy working on a code generator to build stuff like that for me, but at the time it was written manualy. My argument was its a strongly typed wrapper that exposes other developers to exactly what they need, what type it is, and hides the constants. T

                ------------------------------- Carrier Bags - 21st Century Tumbleweed.

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                • T Tristan Rhodes

                  public class SessionWrapper { private HttpSessionState session; // Constants public SessionWrapper() { session = HttpContext.Current.Session; } public string UserName { get{return (string)session[SE_USER_NAME];} set{session[SE_USER_NAME] = value;} } public int? LastPurchase { get{return (int?)session[SE_LAST_PURCHASE];} set{session[SE_LAST_PURCHASE] = value;} } // Etc } I'm actualy working on a code generator to build stuff like that for me, but at the time it was written manualy. My argument was its a strongly typed wrapper that exposes other developers to exactly what they need, what type it is, and hides the constants. T

                  ------------------------------- Carrier Bags - 21st Century Tumbleweed.

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                  PIEBALDconsult
                  wrote on last edited by
                  #35

                  Makes sense to me. A similar thing I do is with ExecuteScalar(), which returns object which then (usually) requires a test for null and a cast, and setting a default value if null. I wrote a wrapper like public virtual T ExecuteScalar<T>(T IfNull){...} to handle the cast. Any time I'm writing a scalar query and don't have to test for null and/or do a cast I save time, the code is more readable too. Usually, spending the time to encapsulate such common tasks will pay off. "A stitch in time saves nine."

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                  • P PIEBALDconsult

                    Makes sense to me. A similar thing I do is with ExecuteScalar(), which returns object which then (usually) requires a test for null and a cast, and setting a default value if null. I wrote a wrapper like public virtual T ExecuteScalar<T>(T IfNull){...} to handle the cast. Any time I'm writing a scalar query and don't have to test for null and/or do a cast I save time, the code is more readable too. Usually, spending the time to encapsulate such common tasks will pay off. "A stitch in time saves nine."

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                    Tristan Rhodes
                    wrote on last edited by
                    #36

                    Well i spent a few months crusading for sensible coding practices, and now i've given up. The other day i was told to remove it, re-centralise all the constants and simply use Session[AppConstants.CONST_NAME] to access everything.

                    ------------------------------- Carrier Bags - 21st Century Tumbleweed.

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                    • T Tristan Rhodes

                      Well i spent a few months crusading for sensible coding practices, and now i've given up. The other day i was told to remove it, re-centralise all the constants and simply use Session[AppConstants.CONST_NAME] to access everything.

                      ------------------------------- Carrier Bags - 21st Century Tumbleweed.

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                      PIEBALDconsult
                      wrote on last edited by
                      #37

                      Glad I'm in a small IT department and have free reign on what I write.

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                      • P PIEBALDconsult

                        Glad I'm in a small IT department and have free reign on what I write.

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                        Tristan Rhodes
                        wrote on last edited by
                        #38

                        I'm in a small IT department too, that was the CTO and Senior Developer pulling rank on my design decision. :S (I'm leaving in a week anyway :D ) T

                        ------------------------------- Carrier Bags - 21st Century Tumbleweed.

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                        • J jhwurmbach

                          Those points that are the hotspots of my current working are CTRL-F2-bookmarked anyway. And if I only want to know the type of a variable, Intellisense would open that little tooltip for me. I all boils down to being simply personal style, I guess.


                          Failure is not an option - it's built right in.

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                          Lost User
                          wrote on last edited by
                          #39

                          I would agree. I consider it good form to reduce as much as possible the scope of a variable. I do not want the IDE suggesting local variables that should not be used at that point.

                          Paul

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                          • T Tristan Rhodes

                            public class SessionWrapper { private HttpSessionState session; // Constants public SessionWrapper() { session = HttpContext.Current.Session; } public string UserName { get{return (string)session[SE_USER_NAME];} set{session[SE_USER_NAME] = value;} } public int? LastPurchase { get{return (int?)session[SE_LAST_PURCHASE];} set{session[SE_LAST_PURCHASE] = value;} } // Etc } I'm actualy working on a code generator to build stuff like that for me, but at the time it was written manualy. My argument was its a strongly typed wrapper that exposes other developers to exactly what they need, what type it is, and hides the constants. T

                            ------------------------------- Carrier Bags - 21st Century Tumbleweed.

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                            PIEBALDconsult
                            wrote on last edited by
                            #40

                            I just spent the day (working from home) writing a wrapper for NumericUpDown that is generic and will take any of the built-in numerics, hide the actual decimal, and handle the casting so I don't have to. Ugly as Hillary, but it works.

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                            • C Chris Maunder

                              ewwww! Declare the variables as close to their first use as possible. I have spoken.

                              cheers, Chris Maunder

                              CodeProject.com : C++ MVP

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                              XTAL256
                              wrote on last edited by
                              #41

                              Well I started programming in Java and we were told to put all our declarations up the top (which i think is the Java coding standard), and i like it this way. Makes all your declarations easy to find. However, sometimes i need a variable at that scope which will only be used further down, so i put it there. It all comes down to the scope of you're variable and where it's used in that scope as to where it should go

                              Customer in computer shop: "Can you copy the Internet onto this disk for me?"

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                              • D dighn

                                But then you have to go back to where you were. Sure you could take note of the position but it would still be annoying.

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                                Russell Jones
                                wrote on last edited by
                                #42

                                in the old vb6 days ctrl-f2 used to take you to a definition and ctrl-shift-f2 used to take you back to where you were before. I'm sure this must be implemented in .net but i've never found out how to do it. I used to use it all the time. Russ

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