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  3. Not programming, but a preference question.

Not programming, but a preference question.

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  • L Lost User

    He is claiming he needs to know its type and does not know it because "var" was used. So he would keep var and add the system type as a prefix (i.e. Hungarian notation)

    var iAge = GetAge();

    Silly IMO. Why do you need to know the type. IDE is smart enough. It is better to name what it is for or add more meaning.

    var ageOfUser = GetusersAge();

    var ageSearch= GetAgeToSearchFor();

    var ageConstraintMin = GetAgeConstraintMin();

    Computers have been intelligent for a long time now. It just so happens that the program writers are about as effective as a room full of monkeys trying to crank out a copy of Hamlet.

    E Offline
    E Offline
    Espen Harlinn
    wrote on last edited by
    #20

    I agree on the importance of good naming, and I'm pretty sure wizardzz does too. I stopped using hungarian notation more than 10 years ago, but I still prefer variables not to be declared using var. I know that the IDE provides great help for determining the type of a variable, but when you have large amounts of code that you have to wade through, I've found that it helps that the variables are fully declared.

    Espen Harlinn Principal Architect, Software - Goodtech Projects & Services AS My LinkedIn Profile

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    • W wizardzz

      var

      A big ugly word. I don't use them unless I really need to. Now I have a project to add to that another developer created. Cool. There are a lot of vars in here. Unavoidable, too. Now, I'm the head "developer" on this team, and basically have to know all code inside and out pretty darm well. So does it make me a dick to want to use some sort of Hungarian Notation* on these vars? [Editing for clarity] I do not mean adding var to the front, or necessarily the type (though that will be useful in some cases, that's why I mistakenly said HN) I meant using a short form abbreviation to signify what the hell the variable is for rather than just "Loc" "Cust" etc when there are many similar variables.

      L Offline
      L Offline
      Lost User
      wrote on last edited by
      #21

      If you know the type why would you use var? It seems strange to use a var with Hungarian notation. var varInt = 2+2; <--- omg, why?

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      • W wizardzz

        var

        A big ugly word. I don't use them unless I really need to. Now I have a project to add to that another developer created. Cool. There are a lot of vars in here. Unavoidable, too. Now, I'm the head "developer" on this team, and basically have to know all code inside and out pretty darm well. So does it make me a dick to want to use some sort of Hungarian Notation* on these vars? [Editing for clarity] I do not mean adding var to the front, or necessarily the type (though that will be useful in some cases, that's why I mistakenly said HN) I meant using a short form abbreviation to signify what the hell the variable is for rather than just "Loc" "Cust" etc when there are many similar variables.

        T Offline
        T Offline
        TheGreatAndPowerfulOz
        wrote on last edited by
        #22

        wizardzz wrote:

        So does it make me a dick to want to use some sort of Hungarian Notation on these vars?

        Maybe. Depends. A var should only be used where the type can be easily ascertained from the context and the variable's name should indicate what it is.

        var veggie = new Cucumber(); // yep, ok

        var dingdong = SomeFunctionOfObtuseNaming(); // nope, not ok

        var custList = GetCustomerList(); // Yep, OK

        Sometimes var is required by the language when using LINQ.

        var custList = from CustomerList select Name, Address where AccountValue > 1000; // dubious syntax, but you get the drift I am sure

        If your actions inspire others to dream more, learn more, do more and become more, you are a leader." - John Quincy Adams
        You must accept one of two basic premises: Either we are alone in the universe, or we are not alone in the universe. And either way, the implications are staggering” - Wernher von Braun

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        • W wizardzz

          Dang, maybe I should have clarified. I meant Hungarian Notation "style", not strictly varName, etc. Example:

          var BeginDate = item.GetType().GetProperty("BeginDate");
          var Locations = item.GetType().GetProperty("Locations");

          I would prefer to be

          var propBeginDate = item.GetType().GetProperty("BeginDate");
          var propLocations = item.GetType().GetProperty("Locations");

          or something like that. This is more of an example of what I meant. I guess I should have initially said, am I dick for changing variables to make more sense?

          T Offline
          T Offline
          TheGreatAndPowerfulOz
          wrote on last edited by
          #23

          wizardzz wrote:

          propBeginDate

          why "prop"? The "type" or "what it is" is already part of the name. BeginDate

          If your actions inspire others to dream more, learn more, do more and become more, you are a leader." - John Quincy Adams
          You must accept one of two basic premises: Either we are alone in the universe, or we are not alone in the universe. And either way, the implications are staggering” - Wernher von Braun

          W S 2 Replies Last reply
          0
          • W wizardzz

            var

            A big ugly word. I don't use them unless I really need to. Now I have a project to add to that another developer created. Cool. There are a lot of vars in here. Unavoidable, too. Now, I'm the head "developer" on this team, and basically have to know all code inside and out pretty darm well. So does it make me a dick to want to use some sort of Hungarian Notation* on these vars? [Editing for clarity] I do not mean adding var to the front, or necessarily the type (though that will be useful in some cases, that's why I mistakenly said HN) I meant using a short form abbreviation to signify what the hell the variable is for rather than just "Loc" "Cust" etc when there are many similar variables.

            Sander RosselS Offline
            Sander RosselS Offline
            Sander Rossel
            wrote on last edited by
            #24

            The only 'Hungarian' notation you need is clear naming of your variables. var iAge does NOT make your code more readable (it does invite for jokes though, like "the new Apple product" or "a coming IceAge"). var cList does NOT make your code more readable. var sName... You get the picture. Hoovering over the var word reveals the type of the variable and is in many cases easier than some weird notation (at least weird in a .NET context). Besides, when is var REALLY necessary? When working with anonymous types. And how are you sensibly going to 'Hungarian notate' those? :) Var isn't really big and ugly either. At least not always. Consider the following:

            // I've had code that looked something like the following:
            foreach (KeyValuePair>> pair in someDictionary) {
            // or...
            foreach (var pair in someDictionary) {

            Which is bigger and uglier? :)

            It's an OO world.

            public class Naerling : Lazy<Person>{
            public void DoWork(){ throw new NotImplementedException(); }
            }

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            • T TheGreatAndPowerfulOz

              wizardzz wrote:

              propBeginDate

              why "prop"? The "type" or "what it is" is already part of the name. BeginDate

              If your actions inspire others to dream more, learn more, do more and become more, you are a leader." - John Quincy Adams
              You must accept one of two basic premises: Either we are alone in the universe, or we are not alone in the universe. And either way, the implications are staggering” - Wernher von Braun

              W Offline
              W Offline
              wizardzz
              wrote on last edited by
              #25

              yeah, 'prop' is not a good example, though there is a Global Begin, that is, a Date, ugh, it's a mess.

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              • E Espen Harlinn

                I use Refactor! Pro[^]. Right click on the offending var declared varable and choose 'Make explicit' and there I have a decently declared varable. I'm pretty sure other refactoring tools have a similar feature.

                Espen Harlinn Principal Architect, Software - Goodtech Projects & Services AS My LinkedIn Profile

                J Offline
                J Offline
                Jorgen Andersson
                wrote on last edited by
                #26

                I love Refactor, but hate Coderush.

                Light moves faster than sound. That is why some people appear bright, until you hear them speak. List of common misconceptions

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                • W wizardzz

                  I guess I took my frustration with vaguely named vars out on var itself. I don't necessarily hate them, I see why they are used and necessary. I know I can look like a dick for asking them not to be used. However I should be frustrated at the right thing for the right reason. There is literally a declaration that looks like

                  var loc = ...

                  when it's being used as:

                  Locations.Location loc = ....

                  Neither of these are nice. I should clarify, there are about 4 different variables referring to different types of locations. Each named very similar/just abbreviated.

                  L Offline
                  L Offline
                  Lost User
                  wrote on last edited by
                  #27

                  wizardzz wrote:

                  There is literally a declaration that looks like

                  var loc = ...

                  when it's being used as:

                  Locations.Location loc = ....

                  wizardzz wrote:

                  there are about 4 different variables referring to different types of locations

                  yeah, that is pretty bad. Rename away with the knowledge that he who wrote it originally was the d1ck.

                  Computers have been intelligent for a long time now. It just so happens that the program writers are about as effective as a room full of monkeys trying to crank out a copy of Hamlet.

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                  • OriginalGriffO OriginalGriff

                    wizardzz wrote:

                    since almost every single variable is a var, it's taking quite some time to figure out why some choices were made

                    That is my main dislike of var - when you are trying to read the code, you have no idea what a variable is, or what you can do with it, without looking at some other bit of code and coming back. Explicit variable typing lets you know immediately what type it is and hence what you can do with it. Besides, it's lazy. "I don't want to think about this variable, it just want to get on with the interesting stuff".

                    Ideological Purity is no substitute for being able to stick your thumb down a pipe to stop the water

                    W Offline
                    W Offline
                    wizardzz
                    wrote on last edited by
                    #28

                    OriginalGriff wrote:

                    Besides, it's lazy. "I don't want to think about this variable, it just want to get on with the interesting stuff".

                    I didn't realize this would be such a hot topic, but yes, I have noticed in some previous projects that this was the case.

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                    • J Jorgen Andersson

                      I love Refactor, but hate Coderush.

                      Light moves faster than sound. That is why some people appear bright, until you hear them speak. List of common misconceptions

                      E Offline
                      E Offline
                      Espen Harlinn
                      wrote on last edited by
                      #29

                      Jörgen Andersson wrote:

                      Coderush

                      Yes, it can be annoying at times ...

                      Espen Harlinn Principal Architect, Software - Goodtech Projects & Services AS My LinkedIn Profile

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                      • W wizardzz

                        I think we had a misunderstanding regarding your first response. I didn't mean Hungarian Notation in the strict sense. I meant as a "style" type. I debated using HN in my first post even. See my response to Steve here: http://www.codeproject.com/Lounge.aspx?msg=4281501#xx4281501xx[^]

                        L Offline
                        L Offline
                        Lost User
                        wrote on last edited by
                        #30

                        Yep, I see that now. Good to know. You were worrying me ;P

                        Computers have been intelligent for a long time now. It just so happens that the program writers are about as effective as a room full of monkeys trying to crank out a copy of Hamlet.

                        1 Reply Last reply
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                        • W wizardzz

                          var

                          A big ugly word. I don't use them unless I really need to. Now I have a project to add to that another developer created. Cool. There are a lot of vars in here. Unavoidable, too. Now, I'm the head "developer" on this team, and basically have to know all code inside and out pretty darm well. So does it make me a dick to want to use some sort of Hungarian Notation* on these vars? [Editing for clarity] I do not mean adding var to the front, or necessarily the type (though that will be useful in some cases, that's why I mistakenly said HN) I meant using a short form abbreviation to signify what the hell the variable is for rather than just "Loc" "Cust" etc when there are many similar variables.

                          J Offline
                          J Offline
                          Jorgen Andersson
                          wrote on last edited by
                          #31

                          wizardzz wrote:

                          A big ugly word

                          Small and ugly I would say.

                          wizardzz wrote:

                          So does it make me a dick to want to use some sort of Hungarian Notation* on these vars?

                          Sort of, it has a distinct feel of VB6, but atleast it doesn't make you a Sunshine.

                          Light moves faster than sound. That is why some people appear bright, until you hear them speak. List of common misconceptions

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                          • J Jorgen Andersson

                            wizardzz wrote:

                            A big ugly word

                            Small and ugly I would say.

                            wizardzz wrote:

                            So does it make me a dick to want to use some sort of Hungarian Notation* on these vars?

                            Sort of, it has a distinct feel of VB6, but atleast it doesn't make you a Sunshine.

                            Light moves faster than sound. That is why some people appear bright, until you hear them speak. List of common misconceptions

                            T Offline
                            T Offline
                            TheGreatAndPowerfulOz
                            wrote on last edited by
                            #32

                            Jörgen Andersson wrote:

                            make you a Sunshine

                            But if it did, then he could elephant himself.

                            If your actions inspire others to dream more, learn more, do more and become more, you are a leader." - John Quincy Adams
                            You must accept one of two basic premises: Either we are alone in the universe, or we are not alone in the universe. And either way, the implications are staggering” - Wernher von Braun

                            1 Reply Last reply
                            0
                            • A AspDotNetDev

                              If you are in the pacifier business, you might consider:

                              var varBinks = getBinkyCount();

                              Thou mewling ill-breeding pignut!

                              T Offline
                              T Offline
                              Tom Delany
                              wrote on last edited by
                              #33

                              AspDotNetDev wrote:

                              var varBinks

                              Wasn't he JarJar's step-brother? :-D

                              WE ARE DYSLEXIC OF BORG. Refutance is systile. Your a$$ will be laminated. There are 10 kinds of people in the world: People who know binary and people who don't.

                              1 Reply Last reply
                              0
                              • W wizardzz

                                Dang, maybe I should have clarified. I meant Hungarian Notation "style", not strictly varName, etc. Example:

                                var BeginDate = item.GetType().GetProperty("BeginDate");
                                var Locations = item.GetType().GetProperty("Locations");

                                I would prefer to be

                                var propBeginDate = item.GetType().GetProperty("BeginDate");
                                var propLocations = item.GetType().GetProperty("Locations");

                                or something like that. This is more of an example of what I meant. I guess I should have initially said, am I dick for changing variables to make more sense?

                                T Offline
                                T Offline
                                Tom Delany
                                wrote on last edited by
                                #34

                                wizardzz wrote:

                                am I dick for changing variables to make more sense?

                                No no. Not just for that. ;P Don't get your undies in a bundle. I'm just busting your chops! :)

                                WE ARE DYSLEXIC OF BORG. Refutance is systile. Your a$$ will be laminated. There are 10 kinds of people in the world: People who know binary and people who don't.

                                1 Reply Last reply
                                0
                                • E Espen Harlinn

                                  I use Refactor! Pro[^]. Right click on the offending var declared varable and choose 'Make explicit' and there I have a decently declared varable. I'm pretty sure other refactoring tools have a similar feature.

                                  Espen Harlinn Principal Architect, Software - Goodtech Projects & Services AS My LinkedIn Profile

                                  T Offline
                                  T Offline
                                  Tom Delany
                                  wrote on last edited by
                                  #35

                                  Espen Harlinn wrote:

                                  I'm pretty sure other refactoring tools have a similar feature.

                                  Resharper does.

                                  WE ARE DYSLEXIC OF BORG. Refutance is systile. Your a$$ will be laminated. There are 10 kinds of people in the world: People who know binary and people who don't.

                                  1 Reply Last reply
                                  0
                                  • P Pete OHanlon

                                    IT doesn't make you a dick.

                                    *pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

                                    "Mind bleach! Send me mind bleach!" - Nagy Vilmos

                                    CodeStash - Online Snippet Management | My blog | MoXAML PowerToys | Mole 2010 - debugging made easier

                                    T Offline
                                    T Offline
                                    Tom Delany
                                    wrote on last edited by
                                    #36

                                    Pete O'Hanlon wrote:

                                    IT doesn't make you a dick.

                                    Damn! you beat me to it![^] :doh:

                                    WE ARE DYSLEXIC OF BORG. Refutance is systile. Your a$$ will be laminated. There are 10 kinds of people in the world: People who know binary and people who don't.

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                                    0
                                    • T TheGreatAndPowerfulOz

                                      wizardzz wrote:

                                      So does it make me a dick to want to use some sort of Hungarian Notation on these vars?

                                      Maybe. Depends. A var should only be used where the type can be easily ascertained from the context and the variable's name should indicate what it is.

                                      var veggie = new Cucumber(); // yep, ok

                                      var dingdong = SomeFunctionOfObtuseNaming(); // nope, not ok

                                      var custList = GetCustomerList(); // Yep, OK

                                      Sometimes var is required by the language when using LINQ.

                                      var custList = from CustomerList select Name, Address where AccountValue > 1000; // dubious syntax, but you get the drift I am sure

                                      If your actions inspire others to dream more, learn more, do more and become more, you are a leader." - John Quincy Adams
                                      You must accept one of two basic premises: Either we are alone in the universe, or we are not alone in the universe. And either way, the implications are staggering” - Wernher von Braun

                                      P Offline
                                      P Offline
                                      PIEBALDconsult
                                      wrote on last edited by
                                      #37

                                      ahmed zahmed wrote:

                                      var should only be used where the type can be easily ascertained

                                      No, that's wrong -- it should only be used when the developer can't know the type, as in

                                      ahmed zahmed wrote:

                                      when using LINQ

                                      Richard DeemingR 1 Reply Last reply
                                      0
                                      • L Lost User

                                        I do not see why people get hung up on var. (I am quite certain I will ge downvoted for this post) IMO it is cleaner.

                                        namespace ThirdPartynamespace
                                        {
                                        class RequiredComponent
                                        {
                                        }
                                        }

                                        ...

                                        namespace DifferentThirdPartyNamespace
                                        {
                                        class RequiredComponent
                                        {
                                        }
                                        }

                                        namespace Local
                                        {
                                        class Thingamajig
                                        {
                                        var component = new ThirdPartyNameSpace.RequiredComponent();
                                        var diffComponent = new DifferentThirdPartyNameSpace.RequiredComponent();
                                        //vs

                                          ThirdPartyNameSpace.RequiredComponent ewComponent = new ThirdPartyNameSpace.RequiredComponent();
                                        
                                         DifferentThirdPartyNameSpace.RequiredComponent ewDiffComponent = new DifferentThirdPartyNameSpace.RequiredComponent();
                                        

                                        }
                                        }

                                        Ok, so now you will say that is a rare case. Maybe it is but because this case happens (actually it happens to me alot but mostly because how I use namespaces), you should follow patterns being set. You may not be always worried about thread mishaps but you still program for it. Other reasons: Return object changes.

                                        Computers have been intelligent for a long time now. It just so happens that the program writers are about as effective as a room full of monkeys trying to crank out a copy of Hamlet.

                                        B Offline
                                        B Offline
                                        BillWoodruff
                                        wrote on last edited by
                                        #38

                                        Hi Colin, Excuse me for being picky-picky, but, in your first code example above: I can see four reasons why it will not compile (errors) just by eye-balling it. To my mind, two of those errors reflect a mis-understanding of the required syntax/semantics for how 'var can be used. I see no reason to down-vote here (or up-vote), because you are, after all, posting this as a "theoretical example," not "working code," but, also, I must admit by being "disturbed" that two different classes contain a sub-class (RequiredComponent) with an identical name: that practice, to me, is one that may give rise to problems with later code maintenance: if "RequiredComponent" is ever used from outside its parent Class(es). best, Bill

                                        "The greatest mystery is not that we have been flung at random between the profusion of matter and of the stars, but that within this prison we can draw from ourselves images powerful enough to deny our nothingness." Andre Malraux

                                        L 1 Reply Last reply
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                                        • W wizardzz

                                          var

                                          A big ugly word. I don't use them unless I really need to. Now I have a project to add to that another developer created. Cool. There are a lot of vars in here. Unavoidable, too. Now, I'm the head "developer" on this team, and basically have to know all code inside and out pretty darm well. So does it make me a dick to want to use some sort of Hungarian Notation* on these vars? [Editing for clarity] I do not mean adding var to the front, or necessarily the type (though that will be useful in some cases, that's why I mistakenly said HN) I meant using a short form abbreviation to signify what the hell the variable is for rather than just "Loc" "Cust" etc when there are many similar variables.

                                          B Offline
                                          B Offline
                                          BillWoodruff
                                          wrote on last edited by
                                          #39

                                          My 2 cents (farthings, groats, obeloi) worth: While MS pronouncements on use of 'var have often mentioned the "economy" of not having to enter the fully qualified name of some object twice: imho, the major usage has been associated with conveniently storing the result of some LINQ-produced complex entity that you could break a tooth on trying to specify its exact type. ... begin edit #1 ... And, I forgot to say using 'var for "anonymous types" is required ! ... end edit #1 ... We've always had ways to shorten up long fully-qualified object names using the "using directive:" as in the "extreme" example offered here:

                                          using System;
                                          using spc1 = ThirdPartyNameSpace.RequiredComponent1;
                                          using spc2 = DifferentThirdPartyNameSpace.RequiredComponent2;

                                          namespace ThirdPartyNameSpace
                                          {
                                          // used internal here just for the 'hell' of it ...
                                          internal class RequiredComponent1
                                          {
                                          }
                                          }

                                          namespace DifferentThirdPartyNameSpace
                                          {
                                          internal class RequiredComponent2
                                          {
                                          }
                                          }

                                          namespace Local
                                          {
                                          class Thingamajig
                                          {
                                          spc1 s1ReqComponent = new spc1();

                                              spc2 s2ReqComponent = new spc2();
                                          }
                                          

                                          }

                                          Note that I am not advocating you should code this way, and, in actual practice, I usually use this only when using a 3rd. party component that really requires complex multi-dot path names to use the most commonly used elements in it. And, in that case, I would use variable names that were, indeed, mnemonic (which is not what you see here). best, Bill

                                          "The greatest mystery is not that we have been flung at random between the profusion of matter and of the stars, but that within this prison we can draw from ourselves images powerful enough to deny our nothingness." Andre Malraux

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