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  3. What is type of foo, if foo != foo?

What is type of foo, if foo != foo?

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  • M Manfred Rudolf Bihy

    That's bullshit! I've tried it out and surely foo!=foo is true if foo is NaN.

    "I had the right to remain silent, but I didn't have the ability!"

    Ron White, Comedian

    P Offline
    P Offline
    Palash Mondal_
    wrote on last edited by
    #7

    Yup, you are right but here foo is actually NaN, but the question is `What is type of foo` So, the real answer is `number` Since, typeof NaN returns "number" Cheers!

    A 1 Reply Last reply
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    • P Palash Mondal_

      Recently had been debugging using the browser console, when I found this answer. Can you guess the type of foo here? Is it a string, function or else?

      L Offline
      L Offline
      Lost User
      wrote on last edited by
      #8

      It's 2015, IEEE 754 is from 1985, how does this still surprise people after 30 years?

      1 Reply Last reply
      0
      • P Palash Mondal_

        Yup, you are right but here foo is actually NaN, but the question is `What is type of foo` So, the real answer is `number` Since, typeof NaN returns "number" Cheers!

        A Offline
        A Offline
        Afzaal Ahmad Zeeshan
        wrote on last edited by
        #9

        Isn't it amazing, how NaN is a number, how a number is a word and how a word is a string. :doh:

        The shit I complain about It's like there ain't a cloud in the sky and it's raining out - Eminem ~! Firewall !~

        P Sander RosselS 2 Replies Last reply
        0
        • A Afzaal Ahmad Zeeshan

          Isn't it amazing, how NaN is a number, how a number is a word and how a word is a string. :doh:

          The shit I complain about It's like there ain't a cloud in the sky and it's raining out - Eminem ~! Firewall !~

          P Offline
          P Offline
          Palash Mondal_
          wrote on last edited by
          #10

          yup, the NaN stuff is amazing, but not sure about 'how a number is a word and how a word is a string' :confused:

          A 1 Reply Last reply
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          • P Palash Mondal_

            yup, the NaN stuff is amazing, but not sure about 'how a number is a word and how a word is a string' :confused:

            A Offline
            A Offline
            Afzaal Ahmad Zeeshan
            wrote on last edited by
            #11

            Great that you already know the NaN is a number. Now, if you have ever programmed in low-level, you would know that a word is a size given to a data, 1 byte, 2 byte etc. So the size of the register in CPU is a word; pre-defined size, doesn't matter 8-bit 16-bit or what. The size is number, thus, a number is word. :-) Now a word in our language, for example, "Hello", cannot be represented as a word in computer which needs some other type, which is string (array of characters), thus a word is a string. From here comes the metaphor, In programming, a number is a word and a word is a string. :cool:

            The shit I complain about It's like there ain't a cloud in the sky and it's raining out - Eminem ~! Firewall !~

            P N 2 Replies Last reply
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            • A Afzaal Ahmad Zeeshan

              Great that you already know the NaN is a number. Now, if you have ever programmed in low-level, you would know that a word is a size given to a data, 1 byte, 2 byte etc. So the size of the register in CPU is a word; pre-defined size, doesn't matter 8-bit 16-bit or what. The size is number, thus, a number is word. :-) Now a word in our language, for example, "Hello", cannot be represented as a word in computer which needs some other type, which is string (array of characters), thus a word is a string. From here comes the metaphor, In programming, a number is a word and a word is a string. :cool:

              The shit I complain about It's like there ain't a cloud in the sky and it's raining out - Eminem ~! Firewall !~

              P Offline
              P Offline
              Palash Mondal_
              wrote on last edited by
              #12

              Do you have any reference documentations for it? I want to learn about it more in-depth. Thanks!

              A 1 Reply Last reply
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              • A Afzaal Ahmad Zeeshan

                Isn't it amazing, how NaN is a number, how a number is a word and how a word is a string. :doh:

                The shit I complain about It's like there ain't a cloud in the sky and it's raining out - Eminem ~! Firewall !~

                Sander RosselS Offline
                Sander RosselS Offline
                Sander Rossel
                wrote on last edited by
                #13

                Afzaal Ahmad Zeeshan wrote:

                Isn't it amazing, how NaN is a number

                Yes! Especially since NaN is short for "Not a Number"! X| My whole life is a lie!

                Visit my blog at Sander's bits - Writing the code you need. Or read my articles at my CodeProject profile.

                Simplicity is prerequisite for reliability. — Edsger W. Dijkstra

                Regards, Sander

                A 1 Reply Last reply
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                • P Palash Mondal_

                  Do you have any reference documentations for it? I want to learn about it more in-depth. Thanks!

                  A Offline
                  A Offline
                  Afzaal Ahmad Zeeshan
                  wrote on last edited by
                  #14

                  Sure, read about Word in computer architecture[^] and the string data type[^]. One thing you should know is that there is no actual string type, it is just an array of characters. :-) Good luck for more in-depths.

                  The shit I complain about It's like there ain't a cloud in the sky and it's raining out - Eminem ~! Firewall !~

                  P 1 Reply Last reply
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                  • Sander RosselS Sander Rossel

                    Afzaal Ahmad Zeeshan wrote:

                    Isn't it amazing, how NaN is a number

                    Yes! Especially since NaN is short for "Not a Number"! X| My whole life is a lie!

                    Visit my blog at Sander's bits - Writing the code you need. Or read my articles at my CodeProject profile.

                    Simplicity is prerequisite for reliability. — Edsger W. Dijkstra

                    Regards, Sander

                    A Offline
                    A Offline
                    Afzaal Ahmad Zeeshan
                    wrote on last edited by
                    #15

                    Clarified, but how is a number a word (the size of register) and how is a word actually a string (the data type)? :laugh: Plus, short form of your life is a lie (removing the F). :cool:

                    The shit I complain about It's like there ain't a cloud in the sky and it's raining out - Eminem ~! Firewall !~

                    1 Reply Last reply
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                    • A Afzaal Ahmad Zeeshan

                      Sure, read about Word in computer architecture[^] and the string data type[^]. One thing you should know is that there is no actual string type, it is just an array of characters. :-) Good luck for more in-depths.

                      The shit I complain about It's like there ain't a cloud in the sky and it's raining out - Eminem ~! Firewall !~

                      P Offline
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                      Palash Mondal_
                      wrote on last edited by
                      #16

                      Thanks for it. Have a nice day ahead! :)

                      1 Reply Last reply
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                      • P Palash Mondal_

                        Recently had been debugging using the browser console, when I found this answer. Can you guess the type of foo here? Is it a string, function or else?

                        J Offline
                        J Offline
                        Joan M
                        wrote on last edited by
                        #17

                        Any after overloading operators...

                        [www.tamautomation.com] | Robots, CNC and PLC machines for grinding and polishing. [YouTube channel]

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                        • M Manfred Rudolf Bihy

                          By definition undefined should be unequal to undefined. Is it? Cheers!

                          "I had the right to remain silent, but I didn't have the ability!"

                          Ron White, Comedian

                          L Offline
                          L Offline
                          Lost User
                          wrote on last edited by
                          #18

                          No, undefined compared with anything (anything includes also again undefined) is "an error" and therefore neither equal nor unequal... it is simply again undefined.

                          1 Reply Last reply
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                          • A Afzaal Ahmad Zeeshan

                            Great that you already know the NaN is a number. Now, if you have ever programmed in low-level, you would know that a word is a size given to a data, 1 byte, 2 byte etc. So the size of the register in CPU is a word; pre-defined size, doesn't matter 8-bit 16-bit or what. The size is number, thus, a number is word. :-) Now a word in our language, for example, "Hello", cannot be represented as a word in computer which needs some other type, which is string (array of characters), thus a word is a string. From here comes the metaphor, In programming, a number is a word and a word is a string. :cool:

                            The shit I complain about It's like there ain't a cloud in the sky and it's raining out - Eminem ~! Firewall !~

                            N Offline
                            N Offline
                            newton saber
                            wrote on last edited by
                            #19

                            Great explanation of how semantics and jargon are sometimes or often at odds with meaning.

                            1 Reply Last reply
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                            • P Palash Mondal_

                              Recently had been debugging using the browser console, when I found this answer. Can you guess the type of foo here? Is it a string, function or else?

                              N Offline
                              N Offline
                              newton saber
                              wrote on last edited by
                              #20

                              spoiler alert -- answer is below Opened Chrome Dev console and ran the following.

                              var x = 'garbage' / 10;

                              x
                              NaN

                              x != x // with coercion
                              true

                              x !== x // even without coercion
                              true

                              typeof(x)
                              "number"

                              P 1 Reply Last reply
                              0
                              • P Palash Mondal_

                                Recently had been debugging using the browser console, when I found this answer. Can you guess the type of foo here? Is it a string, function or else?

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

                                How about int ?

                                private static System.Random randy = new System.Random() ;
                                int foo { get { return ( randy.Next() ) ; } }

                                :-D

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                                • P PIEBALDconsult

                                  How about int ?

                                  private static System.Random randy = new System.Random() ;
                                  int foo { get { return ( randy.Next() ) ; } }

                                  :-D

                                  D Offline
                                  D Offline
                                  Dennis_E
                                  wrote on last edited by
                                  #22

                                  Or DateTime:

                                  DateTime foo { get { return DateTime.Now; } }

                                  :-D

                                  1 Reply Last reply
                                  0
                                  • N newton saber

                                    spoiler alert -- answer is below Opened Chrome Dev console and ran the following.

                                    var x = 'garbage' / 10;

                                    x
                                    NaN

                                    x != x // with coercion
                                    true

                                    x !== x // even without coercion
                                    true

                                    typeof(x)
                                    "number"

                                    P Offline
                                    P Offline
                                    Palash Mondal_
                                    wrote on last edited by
                                    #23

                                    Awesome :thumbsup:

                                    1 Reply Last reply
                                    0
                                    • P Palash Mondal_

                                      Recently had been debugging using the browser console, when I found this answer. Can you guess the type of foo here? Is it a string, function or else?

                                      U Offline
                                      U Offline
                                      User 11783308
                                      wrote on last edited by
                                      #24

                                      NaN

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