Technically correct but practically useless

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.

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

Lost User

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

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

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

Lost User

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

CPallini

I guess they match. :-)

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

CPallini

Many IoT devices, don't have an OS.

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

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 codewitch

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.

honey the codewitch

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

To err is human. Fortune favors the monsters.

honey the codewitch

*angeryface* :mad:

To err is human. Fortune favors the monsters.

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.

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)

TheRealSteveJudge

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

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.

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 codewitch

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.

PIEBALDconsult

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.

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"