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Technically correct but practically useless

Scheduled Pinned Locked Moved The Lounge
csharpc++iotquestion
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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.

    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
          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.

            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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