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Technically correct but practically useless

Scheduled Pinned Locked Moved The Lounge
csharpc++iotquestion
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  • L Lost User

    Hmmm, Can you go into technical details about the difficulties? I can't figure out why you need 'a massive table'.

    CPalliniC Offline
    CPalliniC Offline
    CPallini
    wrote on last edited by
    #4

    I guess the table is in the Remarks section of Char.IsWhiteSpace Method (System) | Microsoft Docs[^].

    "In testa che avete, Signor di Ceprano?" -- Rigoletto

    In testa che avete, signor di Ceprano?

    L 1 Reply Last reply
    0
    • honey the codewitchH honey the codewitch

      So I'm wrapping this

      The quick brown fox jumped over the lazy dog

      And I've traversed all the nastiness with Unicode's non-breaking spaces, and invisible breaks and all of that. I get this:

      The quick
      brown
      fox jumped
      over the
      lazy dog

      Look at the 2nd line. "Oh just remove the whitespace around the line" they said "It will be easy" they said "You can call char.IsWhitespace()" except wait. This isn't .NET. It's an IoT machine with C++ C++ doesn't do 32-bit codepoints out of the box. Do have any idea how hard it is to determine if a character is whitespace in Unicode? I need a massive table. *headdesk*

      To err is human. Fortune favors the monsters.

      Richard DeemingR Offline
      Richard DeemingR Offline
      Richard Deeming
      wrote on last edited by
      #5

      Does the OS you're using not have ICU[^] support built-in?

      "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

      "These people looked deep within my soul and assigned me a number based on the order in which I joined" - Homer

      CPalliniC honey the codewitchH 2 Replies Last reply
      0
      • CPalliniC CPallini

        I guess the table is in the Remarks section of Char.IsWhiteSpace Method (System) | Microsoft Docs[^].

        "In testa che avete, Signor di Ceprano?" -- Rigoletto

        L Offline
        L Offline
        Lost User
        wrote on last edited by
        #6

        I was looking at the table over at Unicode.org[^]

        CPalliniC 1 Reply Last reply
        0
        • L Lost User

          I was looking at the table over at Unicode.org[^]

          CPalliniC Offline
          CPalliniC Offline
          CPallini
          wrote on last edited by
          #7

          I guess they match. :-)

          "In testa che avete, Signor di Ceprano?" -- Rigoletto

          In testa che avete, signor di Ceprano?

          1 Reply Last reply
          0
          • Richard DeemingR Richard Deeming

            Does the OS you're using not have ICU[^] support built-in?

            "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

            CPalliniC Offline
            CPalliniC Offline
            CPallini
            wrote on last edited by
            #8

            Many IoT devices, don't have an OS.

            "In testa che avete, Signor di Ceprano?" -- Rigoletto

            In testa che avete, signor di Ceprano?

            1 Reply Last reply
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            • honey the codewitchH honey the codewitch

              So I'm wrapping this

              The quick brown fox jumped over the lazy dog

              And I've traversed all the nastiness with Unicode's non-breaking spaces, and invisible breaks and all of that. I get this:

              The quick
              brown
              fox jumped
              over the
              lazy dog

              Look at the 2nd line. "Oh just remove the whitespace around the line" they said "It will be easy" they said "You can call char.IsWhitespace()" except wait. This isn't .NET. It's an IoT machine with C++ C++ doesn't do 32-bit codepoints out of the box. Do have any idea how hard it is to determine if a character is whitespace in Unicode? I need a massive table. *headdesk*

              To err is human. Fortune favors the monsters.

              B Offline
              B Offline
              BorkenkaeferFrisstFichten
              wrote on last edited by
              #9

              The correct phrase is: the quick brown fox jumps over the lazy dogs back 0123456789 That was the final test the engineer made after the telex device had been installed at the customer's premises. The funny "phrase" contains all characters a Telex had to be able to receive and transmit correctly via POTS using its very own error-correction. At the time this was relevant, it was very much useful as it had been an industry standard procedure. It was also used for testing serial terminals' keyboards.

              honey the codewitchH 1 Reply Last reply
              0
              • Richard DeemingR Richard Deeming

                Does the OS you're using not have ICU[^] support built-in?

                "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

                honey the codewitchH Offline
                honey the codewitchH Offline
                honey the codewitch
                wrote on last edited by
                #10

                What OS? FreeRTOS? No. And it wouldn't know what to do with truetype anyway. It has no concept of graphics

                To err is human. Fortune favors the monsters.

                1 Reply Last reply
                0
                • B BorkenkaeferFrisstFichten

                  The correct phrase is: the quick brown fox jumps over the lazy dogs back 0123456789 That was the final test the engineer made after the telex device had been installed at the customer's premises. The funny "phrase" contains all characters a Telex had to be able to receive and transmit correctly via POTS using its very own error-correction. At the time this was relevant, it was very much useful as it had been an industry standard procedure. It was also used for testing serial terminals' keyboards.

                  honey the codewitchH Offline
                  honey the codewitchH Offline
                  honey the codewitch
                  wrote on last edited by
                  #11

                  Mine was accurate, just truncated at the s :laugh:

                  To err is human. Fortune favors the monsters.

                  1 Reply Last reply
                  0
                  • Sander RosselS Sander Rossel

                    I have a simple(r) solution. Print the character to an image (in-memory, obviously). Now connect to some OCR service and let it scan the image. If the result is null, "", " " or " " it's whitespace. Just thinking outside the box :D

                    Best, Sander Azure DevOps Succinctly (free eBook) Azure Serverless Succinctly (free eBook) Migrating Apps to the Cloud with Azure arrgh.js - Bringing LINQ to JavaScript

                    honey the codewitchH Offline
                    honey the codewitchH Offline
                    honey the codewitch
                    wrote on last edited by
                    #12

                    *angeryface* :mad:

                    To err is human. Fortune favors the monsters.

                    1 Reply Last reply
                    0
                    • L Lost User

                      Hmmm, Can you go into technical details about the difficulties? I can't figure out why you need 'a massive table'.

                      honey the codewitchH Offline
                      honey the codewitchH Offline
                      honey the codewitch
                      wrote on last edited by
                      #13

                      The table isn't as big as a thought. A long time ago I wrote something to spit out character class tables, and I thought I remembered the whitespace one being huge. It's not, now that I looked it up. Still, it's larger than I'd like.

                      To err is human. Fortune favors the monsters.

                      L 1 Reply Last reply
                      0
                      • honey the codewitchH honey the codewitch

                        The table isn't as big as a thought. A long time ago I wrote something to spit out character class tables, and I thought I remembered the whitespace one being huge. It's not, now that I looked it up. Still, it's larger than I'd like.

                        To err is human. Fortune favors the monsters.

                        L Offline
                        L Offline
                        Lost User
                        wrote on last edited by
                        #14

                        honey the codewitch wrote:

                        Still, it's larger than I'd like.

                        I don't think you need to check for all of them. I think you can get away with just 12. isWhitespace[^] Btw, now that .NET is using ICU[^] this should match the C# behavior. (I just checked ICU docs to confirm)

                        honey the codewitchH 1 Reply Last reply
                        0
                        • honey the codewitchH honey the codewitch

                          So I'm wrapping this

                          The quick brown fox jumped over the lazy dog

                          And I've traversed all the nastiness with Unicode's non-breaking spaces, and invisible breaks and all of that. I get this:

                          The quick
                          brown
                          fox jumped
                          over the
                          lazy dog

                          Look at the 2nd line. "Oh just remove the whitespace around the line" they said "It will be easy" they said "You can call char.IsWhitespace()" except wait. This isn't .NET. It's an IoT machine with C++ C++ doesn't do 32-bit codepoints out of the box. Do have any idea how hard it is to determine if a character is whitespace in Unicode? I need a massive table. *headdesk*

                          To err is human. Fortune favors the monsters.

                          T Offline
                          T Offline
                          TheRealSteveJudge
                          wrote on last edited by
                          #15

                          No idea, but shouldn't it be "The quick brown fox jumps over the lazy dog"? :laugh:

                          M 1 Reply Last reply
                          0
                          • L Lost User

                            honey the codewitch wrote:

                            Still, it's larger than I'd like.

                            I don't think you need to check for all of them. I think you can get away with just 12. isWhitespace[^] Btw, now that .NET is using ICU[^] this should match the C# behavior. (I just checked ICU docs to confirm)

                            honey the codewitchH Offline
                            honey the codewitchH Offline
                            honey the codewitch
                            wrote on last edited by
                            #16

                            Yeah, but I'm not using .NET, and my platform doesn't understand unicode beyond wchar_t which I can't even use.

                            To err is human. Fortune favors the monsters.

                            L 1 Reply Last reply
                            0
                            • honey the codewitchH honey the codewitch

                              Yeah, but I'm not using .NET, and my platform doesn't understand unicode beyond wchar_t which I can't even use.

                              To err is human. Fortune favors the monsters.

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

                              honey the codewitch wrote:

                              Yeah, but I'm not using .NET, and my platform doesn't understand unicode

                              Nobody in this thread thinks you are using .NET I'm saying that you can write a C function for your IoT device that will duplicate Java and C# whitespace behavior simply by checking for those 12 values. They are all doing the same thing as ICU.

                              honey the codewitchH 1 Reply Last reply
                              0
                              • L Lost User

                                honey the codewitch wrote:

                                Yeah, but I'm not using .NET, and my platform doesn't understand unicode

                                Nobody in this thread thinks you are using .NET I'm saying that you can write a C function for your IoT device that will duplicate Java and C# whitespace behavior simply by checking for those 12 values. They are all doing the same thing as ICU.

                                honey the codewitchH Offline
                                honey the codewitchH Offline
                                honey the codewitch
                                wrote on last edited by
                                #18

                                Ohhhh thanks. Sorry, it was early and I was still a bit slow. I'll do that.

                                To err is human. Fortune favors the monsters.

                                1 Reply Last reply
                                0
                                • honey the codewitchH honey the codewitch

                                  So I'm wrapping this

                                  The quick brown fox jumped over the lazy dog

                                  And I've traversed all the nastiness with Unicode's non-breaking spaces, and invisible breaks and all of that. I get this:

                                  The quick
                                  brown
                                  fox jumped
                                  over the
                                  lazy dog

                                  Look at the 2nd line. "Oh just remove the whitespace around the line" they said "It will be easy" they said "You can call char.IsWhitespace()" except wait. This isn't .NET. It's an IoT machine with C++ C++ doesn't do 32-bit codepoints out of the box. Do have any idea how hard it is to determine if a character is whitespace in Unicode? I need a massive table. *headdesk*

                                  To err is human. Fortune favors the monsters.

                                  P Offline
                                  P Offline
                                  PIEBALDconsult
                                  wrote on last edited by
                                  #19

                                  For part of my UTF-8 decoder I use a sparse array, but of course I'm using C# so I can catch Index Exceptions. I guess I now have to add more characters to it though.

                                  1 Reply Last reply
                                  0
                                  • T TheRealSteveJudge

                                    No idea, but shouldn't it be "The quick brown fox jumps over the lazy dog"? :laugh:

                                    M Offline
                                    M Offline
                                    megaadam
                                    wrote on last edited by
                                    #20

                                    TheRealSteveJudge wrote:

                                    jumps

                                    I think you must've solved it!

                                    "If we don't change direction, we'll end up where we're going"

                                    T 1 Reply Last reply
                                    0
                                    • M megaadam

                                      TheRealSteveJudge wrote:

                                      jumps

                                      I think you must've solved it!

                                      "If we don't change direction, we'll end up where we're going"

                                      T Offline
                                      T Offline
                                      TheRealSteveJudge
                                      wrote on last edited by
                                      #21

                                      :laugh:

                                      1 Reply Last reply
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