Н•šð•Ÿð••ð• ð•Ÿð•–𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦

With Unicode requiring 21 But would it be worth the hassle for example as internal encoding in an operating system? TazeTSchnitzel on May 27, prev next [—]. Simple compression can take care of the wastefulness of using excessive space to encode text - so it 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 only leaves efficiency, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦.

As you did not give a hint on what a language it is supposed to be, trying encodings is pretty much pointless. But inserting a codepoint with your approach would require all downstream bits to be shifted within and across bytes, something that would be a much bigger computational burden, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦.

UTF-8 has a native representation for big code 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 that encodes each in 4 bytes. It also has the advantage of breaking in less random ways than unicode. Please Sign up or sign in to vote. Veedrac on May 27, parent next [—].

Well, Python 3's unicode support is much more complete, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦. See combining code points. In section 4. SiVal on May 28, parent prev next [—].

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The more interesting case here, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦, which isn't mentioned at all, is that the input contains unpaired surrogate code points. I think you'd lose 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 of the already-minor benefits of fixed indexing, and there would be enough extra complexity to leave you worse Em ngân dancer. Pretty unrelated but I was thinking about efficiently encoding Unicode a week or two ago.

The numeric value of these code units denote codepoints that lie 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 within the BMP. Because we want Chinese speaking encoding schemes to be equivalent, the Unicode code space contains a hole where these so-called surrogates lie. And I mean, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦, I can't really think of any cross-locale requirements fulfilled by unicode.

This email is in use, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦. It's all about the answers! An obvious example would be treating UTF as a fixed-width encoding, which is bad because you might end up cutting grapheme clusters in half, and you can easily 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 about normalization if you think about it that way.

Want to bet that someone will cleverly decide that it's "just easier" to use it as an external encoding as well? That is a unicode string that cannot be encoded or rendered in any meaningful way. Can someone explain this in laymans terms?

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Most likely, this is some sequence on some language which makes no sense; I can tell it by looking on repetition 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦. Dylan on May 27, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦, root parent next [—], 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦.

The encoding that was designed to be fixed-width is called UCS UTF is its variable-length successor. Right, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦, ok.

We would never run out of codepoints, and lecagy applications can simple ignore codepoints it doesn't understand. As the user of unicode I don't really care about that. By Email: Once you sign in you will be able to subscribe for any updates here. Man, what was the drive behind adding that extra complexity to life?!

Posted May pm Sergey Alexandrovich Kryukov. It's rare enough to not be a top priority. So basically it goes wrong when someone assumes that any two of the above is "the same thing". These systems could be updated to UTF while preserving this assumption. Existing software assumed that every Н•šð•Ÿð••ð• ð•Ÿð•–𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 character was also a code point.

That is, you can jump to the middle of a stream and find the next code point by looking at no more than 4 bytes.

The name might throw you off, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦, but it's very much serious. And UTF-8 decoders will just turn invalid surrogates into the replacement character. Every term is linked to its definition. TazeTSchnitzel on May 27, parent prev next [—]. I understand that for efficiency 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 want this to be as fast as possible. TazeTSchnitzel on May 27, root parent next [—].

It might be more clear to say: "the resulting sequence will not represent the surrogate code points. PaulHoule on May 27, parent prev next [—]. We would only waste 1 Xxx of Chinese in water per byte, which seems reasonable given just how many problems encoding usually represent. Therefore, the 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 of Unicode scalar value was introduced and Unicode text was restricted to not contain any surrogate code point.

I'm not even sure why you would want to find something like the 80th code point in a string, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦. That is the ultimate goal. Some issues are more subtle: In principle, the decision what should be considered a single character may depend on the language, nevermind the debate about Han unification - but as 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 as I'm concerned, that's a WONTFIX.

But since surrogate code points are real code points, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦, you could imagine an alternative UTF-8 encoding for big code points: make a Н•šð•Ÿð••ð• ð•Ÿð•–𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 surrogate pair, then UTF-8 encode the two code points of the 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 pair hey, they are real code points!

Is the desire for a fixed length encoding misguided because indexing into a string is way less common than it seems?

It's all about the answers!

That means if you slice or index into a unicode strings, you might get an "invalid" unicode string back. This was presumably deemed simpler that only restricting pairs.

Let me see if I have this straight, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦. People used to think 16 bits would be enough for anyone. The multi code point thing feels like it's just an encoding detail in a different place. I don't even 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 what you are achieving here.

The nature of unicode is that there's always a problem you didn't but should know existed. An number like 0xd could have a code unit meaning as part of a UTF surrogate pair, and also be a totally unrelated Unicode code point. Why this over, say, CESU-8? Create a text file with this text, save it as is and open with some good Web browser. If Н•šð•Ÿð••ð• ð•Ÿð•–𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 slice characters I expect a slice of characters.

You can divide strings appropriate to the use, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦. On further thought I agree. It might be removed for non-notability. WTF8 exists 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 as an internal encoding in-memory representationbut it's very useful there, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦.

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Questions Tags Users Badges. If you have some clue, here is one idea how Dog to man sex try out possible variants quick. Why wouldn't this work, apart from already existing applications that does not know how to do this. This is 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 gibberish to me, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦.

If was to make a first attempt at a variable length, but well defined backwards compatible encoding scheme, I would use something like the number of bits upto and including the first 0 bit as defining the 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 of bytes used for this character.

Coding for variable-width takes more effort, but it gives you a better result. The name is unserious but the project is very serious, its writer has responded to a few comments and linked to a presentation of his on the subject[0]. Yes, "fixed length" is misguided. If you like Generalized UTF-8, except that you 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 want to use surrogate pairs for big code points, مرهقه سكس مصري مرهقه you want to totally disallow the UTFnative 4-byte sequence for them, you might like CESU-8, which does this.

Veedrac on May 27, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦, root parent prev next [—]. And this 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 really lossy, since AFAIK the surrogate code points exist for the sole purpose of representing surrogate pairs. But UTF-8 disallows this and only allows the canonical, 4-byte encoding.

I thought he was tackling the other problem which is that you frequently find web pages that have both UTF-8 codepoints and single bytes encoded as ISO-latin-1 or Windows This is a solution to a problem I didn't know existed. That was the piece I was missing.

Unfortunately it made everything else more complicated. Add a Solution, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦. I guess you need some operations to get to those details if you need. Thanks for explaining. When you use an encoding based on integral bytes, you can use the hardware-accelerated and often parallelized "memcpy" bulk byte moving hardware features to manipulate your strings.

Dylan on May 27, parent prev next [—]. If you feel this is unjust and UTF-8 should 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 allowed to encode surrogate code points if it feels like it, then you might like Generalized UTF-8, which is exactly like UTF-8 except 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 is allowed, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦.

Add your solution here. It requires all the extra shifting, dealing with the potentially partially filled last 64 bits and encoding and decoding to and from the external world. That's certainly one important source of errors. O 1 indexing of code points is not that useful because code points are not what people think of as "characters".

Ah yes, the JavaScript solution. SimonSapin on May 28, parent next [—].

Н•šð•Ÿð••ð• ð•Ÿð•–𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 kind of cat always gets out of the bag eventually. Having to interact with those systems from a UTF8-encoded world is an issue because they don't guarantee well-formed UTF, they might contain unpaired surrogates which can't be decoded to a codepoint allowed in UTF-8 or UTF neither allows unpaired surrogates, for obvious reasons. Treat my content as plain text, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦, not as HTML.

Question Info

Because not everyone gets Unicode right, real-world data 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 contain unpaired surrogates, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦, and WTF-8 is an extension of UTF-8 that handles such data gracefully. Sometimes that's code points, but more often it's probably characters or bytes. Maybe you use the wrong storeContent method or your case is not really covered.

I think there might be some value 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦 a fixed length encoding but UTF seems a bit wasteful. This was gibberish to me too. Compatibility with UTF-8 systems, I guess? It's often implicit.

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If you mean, you are manipulating the process XML and storing that data, then this is done in a different way, if I am not mistaken. Accept Solution Reject Solution. Hi I have such a phrase:. SimonSapin on May 27, parent prev next [—], 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦. As a trivial example, case conversions now cover the whole unicode range.

And because of this global confusion, everyone important ends up implementing something that somehow does something moronic - so then everyone else has yet another problem they didn't know existed and they all fall into a self-harming spiral of depravity.

See more: HTML. The solution they settled on is weird, but has some useful properties. Н•šð•Ÿð••ð• ð•Ÿð•–𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦, it's possible to make mistakes when converting between representations, eg getting endianness wrong.

There's no good use case, 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦. OK Paste 𝕚𝕟𝕕𝕠𝕟𝕖𝕤𝕚𝕒 𝕥𝕖𝕣𝕓𝕒𝕣𝕦. That is the case where the UTF will actually end up being ill-formed. Existing Members Sign in to your account. Serious question -- is this a serious project or a joke? By the way, one thing that was slightly unclear to me in the doc.

Posted May pm fhdgbfbd. An interesting possible application for this is JSON parsers.

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