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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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  • P Palash Mondal_

    Your are very near, but this is not the exact answer :)

    M Offline
    M Offline
    Manfred Rudolf Bihy
    wrote on last edited by
    #6

    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 1 Reply Last reply
    0
    • 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
              0
              • 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
                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 !~

                  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
                        P Offline
                        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
                            0
                            • 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

                                  D 1 Reply Last reply
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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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