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. Other Discussions
  3. The Weird and The Wonderful
  4. new bool()

new bool()

Scheduled Pinned Locked Moved The Weird and The Wonderful
pythoncomlearning
26 Posts 15 Posters 3 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.
  • J Jon McKee

    A little pointless but not too crazy. bool is just an alias for System.Boolean. The else was the silly part.

    Boolean isOffset = new Boolean(); //default false
    if (reader["foo"].ToString().ToUpper().Trim() == "BAR")
    isOffset = Boolean.Parse(Boolean.TrueString);

    Though I suspect unlike above that true and false are probably aliases for pre-defined constants. Couldn't find documentation on how they're created; above was just a guess using public Boolean members. Also true and false are operators that can be overloaded to create nullable types prior to .NET 2.0 (Nullable). Of course it's still silly to do it this way. bool is shorter to write and using true and false is both clearer and shorter.

    M Offline
    M Offline
    Marc Clifton
    wrote on last edited by
    #14

    Well, the whole thing could be reduced to

    bool isOffset = reader["foo"].ToString().ToUpper().Trim() == "BAR";

    Why couldn't the programmer see that? Why didn't someone in the 2+ years that this code has been in production fix it? Marc

    V.A.P.O.R.ware - Visual Assisted Programming / Organizational Representation Learning to code with python is like learning to swim with those little arm floaties. It gives you undeserved confidence and will eventually drown you. - DangerBunny Artificial intelligence is the only remedy for natural stupidity. - CDP1802

    J J L 3 Replies Last reply
    0
    • M Marc Clifton

      Well, the whole thing could be reduced to

      bool isOffset = reader["foo"].ToString().ToUpper().Trim() == "BAR";

      Why couldn't the programmer see that? Why didn't someone in the 2+ years that this code has been in production fix it? Marc

      V.A.P.O.R.ware - Visual Assisted Programming / Organizational Representation Learning to code with python is like learning to swim with those little arm floaties. It gives you undeserved confidence and will eventually drown you. - DangerBunny Artificial intelligence is the only remedy for natural stupidity. - CDP1802

      J Offline
      J Offline
      Jon McKee
      wrote on last edited by
      #15

      Very true! :thumbsup: I was just pointing out that new bool() isn't as crazy as it looks at first glance :)

      M 1 Reply Last reply
      0
      • J Jon McKee

        Very true! :thumbsup: I was just pointing out that new bool() isn't as crazy as it looks at first glance :)

        M Offline
        M Offline
        Marc Clifton
        wrote on last edited by
        #16

        Jon McKee wrote:

        I was just pointing out that new bool() isn't as crazy as it looks at first glance

        Quite so. I don't usually even think about bool being shorthand for System.Boolean, and it's good to be reminded of the deeper nuances of the language. Marc

        V.A.P.O.R.ware - Visual Assisted Programming / Organizational Representation Learning to code with python is like learning to swim with those little arm floaties. It gives you undeserved confidence and will eventually drown you. - DangerBunny Artificial intelligence is the only remedy for natural stupidity. - CDP1802

        1 Reply Last reply
        0
        • J Jon McKee

          A little pointless but not too crazy. bool is just an alias for System.Boolean. The else was the silly part.

          Boolean isOffset = new Boolean(); //default false
          if (reader["foo"].ToString().ToUpper().Trim() == "BAR")
          isOffset = Boolean.Parse(Boolean.TrueString);

          Though I suspect unlike above that true and false are probably aliases for pre-defined constants. Couldn't find documentation on how they're created; above was just a guess using public Boolean members. Also true and false are operators that can be overloaded to create nullable types prior to .NET 2.0 (Nullable). Of course it's still silly to do it this way. bool is shorter to write and using true and false is both clearer and shorter.

          L Offline
          L Offline
          Lost User
          wrote on last edited by
          #17

          FWIW while bool is "sort of a struct", like all primitive types instances of it are "created" (without any ctors being called) by MSIL instructions, eg `true` is created by ldc.i4.1 And `new bool()` *literally is* (not just sort of metaphysically/hypothetically according to an AS-IF rule but the literal compiler output) ldc.i4.0 I guess the moral of this story is that bool is int

          J 1 Reply Last reply
          0
          • L Lost User

            FWIW while bool is "sort of a struct", like all primitive types instances of it are "created" (without any ctors being called) by MSIL instructions, eg `true` is created by ldc.i4.1 And `new bool()` *literally is* (not just sort of metaphysically/hypothetically according to an AS-IF rule but the literal compiler output) ldc.i4.0 I guess the moral of this story is that bool is int

            J Offline
            J Offline
            Jon McKee
            wrote on last edited by
            #18

            Interesting. Looking at the CLI Specification[^] I.8.2.2 on page 46 that makes sense. Under all the abstraction it's an integer type.

            1 Reply Last reply
            0
            • M Marc Clifton

              bool isOffset = new bool();
              if (reader["foo"].ToString().ToUpper().Trim() == "BAR")
              isOffset = true;
              else
              isOffset = false;

              I'll stop now. Marc

              V.A.P.O.R.ware - Visual Assisted Programming / Organizational Representation Learning to code with python is like learning to swim with those little arm floaties. It gives you undeserved confidence and will eventually drown you. - DangerBunny Artificial intelligence is the only remedy for natural stupidity. - CDP1802

              B Offline
              B Offline
              Bernhard Hiller
              wrote on last edited by
              #19

              Well, look: a variable must be initialized before it can be used. Now just imagine: somehow a third possibility comes into existence which is not covered by that if ... else - now you'll run into an error when you access isOffset because it was not initialized. :^)

              OriginalGriffO 1 Reply Last reply
              0
              • B Bernhard Hiller

                Well, look: a variable must be initialized before it can be used. Now just imagine: somehow a third possibility comes into existence which is not covered by that if ... else - now you'll run into an error when you access isOffset because it was not initialized. :^)

                OriginalGriffO Offline
                OriginalGriffO Offline
                OriginalGriff
                wrote on last edited by
                #20

                So you want

                if (...)
                ...
                else
                ...
                maybe
                ...

                :laugh:

                Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

                "I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
                "Common sense is so rare these days, it should be classified as a super power" - Random T-shirt

                J 1 Reply Last reply
                0
                • M Marc Clifton

                  bool isOffset = new bool();
                  if (reader["foo"].ToString().ToUpper().Trim() == "BAR")
                  isOffset = true;
                  else
                  isOffset = false;

                  I'll stop now. Marc

                  V.A.P.O.R.ware - Visual Assisted Programming / Organizational Representation Learning to code with python is like learning to swim with those little arm floaties. It gives you undeserved confidence and will eventually drown you. - DangerBunny Artificial intelligence is the only remedy for natural stupidity. - CDP1802

                  Kornfeld Eliyahu PeterK Offline
                  Kornfeld Eliyahu PeterK Offline
                  Kornfeld Eliyahu Peter
                  wrote on last edited by
                  #21

                  Do you have a keyboard? Hit CTRL+A/Del and save us!

                  Skipper: We'll fix it. Alex: Fix it? How you gonna fix this? Skipper: Grit, spit and a whole lotta duct tape.

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

                  1 Reply Last reply
                  0
                  • M Marc Clifton

                    bool isOffset = new bool();
                    if (reader["foo"].ToString().ToUpper().Trim() == "BAR")
                    isOffset = true;
                    else
                    isOffset = false;

                    I'll stop now. Marc

                    V.A.P.O.R.ware - Visual Assisted Programming / Organizational Representation Learning to code with python is like learning to swim with those little arm floaties. It gives you undeserved confidence and will eventually drown you. - DangerBunny Artificial intelligence is the only remedy for natural stupidity. - CDP1802

                    Mike HankeyM Offline
                    Mike HankeyM Offline
                    Mike Hankey
                    wrote on last edited by
                    #22

                    bool IsOffSet = new bool { improved };

                    New version: WinHeist Version 2.2.2 Beta
                    I told my psychiatrist that I was hearing voices in my head. He said you don't have a psychiatrist!

                    1 Reply Last reply
                    0
                    • OriginalGriffO OriginalGriff

                      So you want

                      if (...)
                      ...
                      else
                      ...
                      maybe
                      ...

                      :laugh:

                      Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

                      J Offline
                      J Offline
                      Jorgen Andersson
                      wrote on last edited by
                      #23

                      Reminds me of the fuzzy logic that was so popular in the beginning of the nineties.

                      Wrong is evil and must be defeated. - Jeff Ello

                      1 Reply Last reply
                      0
                      • M Marc Clifton

                        Well, the whole thing could be reduced to

                        bool isOffset = reader["foo"].ToString().ToUpper().Trim() == "BAR";

                        Why couldn't the programmer see that? Why didn't someone in the 2+ years that this code has been in production fix it? Marc

                        V.A.P.O.R.ware - Visual Assisted Programming / Organizational Representation Learning to code with python is like learning to swim with those little arm floaties. It gives you undeserved confidence and will eventually drown you. - DangerBunny Artificial intelligence is the only remedy for natural stupidity. - CDP1802

                        J Offline
                        J Offline
                        Johnny YYZ
                        wrote on last edited by
                        #24

                        Marc Clifton wrote:

                        Well, the whole thing could be reduced to

                        I guess it can if reader["foo"] can never return null.

                        J 1 Reply Last reply
                        0
                        • J Johnny YYZ

                          Marc Clifton wrote:

                          Well, the whole thing could be reduced to

                          I guess it can if reader["foo"] can never return null.

                          J Offline
                          J Offline
                          Jeremy Falcon
                          wrote on last edited by
                          #25

                          So, just for my own understanding then, something like this would be better then correct? ...

                          bool isOffset = (reader["foo"]?.ToString().ToUpper().Trim() == "BAR") ?? false;

                          Jeremy Falcon

                          1 Reply Last reply
                          0
                          • M Marc Clifton

                            Well, the whole thing could be reduced to

                            bool isOffset = reader["foo"].ToString().ToUpper().Trim() == "BAR";

                            Why couldn't the programmer see that? Why didn't someone in the 2+ years that this code has been in production fix it? Marc

                            V.A.P.O.R.ware - Visual Assisted Programming / Organizational Representation Learning to code with python is like learning to swim with those little arm floaties. It gives you undeserved confidence and will eventually drown you. - DangerBunny Artificial intelligence is the only remedy for natural stupidity. - CDP1802

                            L Offline
                            L Offline
                            Lost User
                            wrote on last edited by
                            #26

                            Marc Clifton wrote:

                            Why couldn't the programmer see that? Why didn't someone in the 2+ years that this code has been in production fix it?

                            I have always predicted that this type would show up on the scene sooner or later and, by now, have seen them in action often enough. They actually do as they were told and avoided memory management at all cost. That is why they have no understanding what value types and reference types are all about, nor do they have any idea how value types are an illusion created by the compiler to spare us having to wrestle with references and check for null for every variable. To them these things make no sense and appear to be some random and arcane rules which have been inherited from languages of the past. The same goes for logical operators. I have given up on trying to help the kids when they can't get it done. They think that's more of this arcane ancient stuff that nobody needs to know anymore. Letting them figure it out themselves is the only way to convince them otherwise. So be it.

                            The language is JavaScript. that of Mordor, which I will not utter here
                            This is Javascript. If you put big wheels and a racing stripe on a golf cart, it's still a fucking golf cart.
                            "I don't know, extraterrestrial?" "You mean like from space?" "No, from Canada." If software development were a circus, we would all be the clowns.

                            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