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UTF-8, UTF-16, and UTF-32
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What is the Best UTF [closed]
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Since an Unicode character is U+XXXX(in hex), so it only needs two bytes, then why we come up with various of different encoding scheme like UTF-8 which takes from one to four bytes? Can't we just map the each Unicode character into binary data of two bytes, why we ever need four bytes to encode?
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Inconsistent Unicode Emoji Glyphs/Symbols
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I want to print the unicode character U+21A9 which is the undo arrow (↩), but Apple likes to turn that in a bubbly looking emoji like
Pick a font containing the glyph that you want, like Lucida Grande or Menlo.
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http://www.joelonsoftware.com/articles/Unicode.html. The below statement is from the this article:
"Some people are under the misconception that Unicode is simply a 16-bit code where each character takes 16 bits and therefore there are 65,536 possible characters. This is not, actually, correct. It is the single most common myth about Unicode". The author is trying to make a point that Unicode is not just "ASCII with more bytes"(extended ASCII), there is more to Unicode than just it appears. But I am not getting how Unicode is different? To me it appears as extended ASCII.
As unicode has more numbers, it can map more characters.
Yes, that's it.
The ASCII character set defines a whopping 127 numbers, and specifies which characters they represent, and how they should be serialized as byte sequences. It says that each number should be encoded as a single byte, end of story.
Unicode has room for over a million such numbers, and specifies several different ways in which they may be serialized as byte sequences.
In addition, Unicode does quite a lot more than that - for example it doesn't just map integers to characters, it also maps characters to glyphs (the graphical symbols in a font), as well as describing various metadata for each character. But the main thing is just that Unicode defines a much bigger code space and separates the integer/character mapping from the encoding (so the same integer can be encoded as different byte sequences depending on whether you encode as UTF-8, UTF-16 or UTF-32)
Unicode assigns a unique integer to characters (and character modifiers). There are many encodings, but common ones are UTF-16 and UTF-8, which are both variable-width encodings.
ASCII is a 1-byte encoding of a subset of characters.
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How to convert letters with accents, umlauts, etc to their ASCII counterparts in Perl?
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Closed 8 years ago.
I Have a Set of Accented Character like
I have to convert all the Accented Character to normal Character.
If i give àáâãäåæ or ÀÁÂÃÄÅ it should come normal 'a' or 'A'.
Please give any suggestion.
Check out Text::Unidecode. The unidecode() function will take those characters and return their ASCII translations. However, be careful with this module as there a few disclaimers/constraints.
Hope that helps!
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What does it mean when I save a text file as "Unicode" in notepad? is it Utf-8, Utf-16 or Utf-32? Thanks in advance.
In Notepad, as in Windows software in general, “Unicode” as an encoding name means UTF-16 Little Endian (UTF-16LE). (I first thought it’s not real UTF-16, because Notepad++ recognizes it as UCS-2 and shows the content as garbage, but re-checking with BabelPad, I concluded that Notepad can encode even non-BMP characters correctly.)
Similarly, “Unicode big endian” means UTF-16 Big Endian. And “ANSI” means the system’s native legacy encoding, e.g. the 8-bit windows-1252 encoding in Western versions of Windows.
All of these formats are "Unicode". But usually editors on Mac and Windows mean UTF-8 with that because it is ASCII compatible below code 128 IIRC. UTF-8 can represent more codes than just 256 (which fits in a single byte of 8 bits) by using a special character which means that the following byte also belongs to the same character.
If you look at the output in terminal, say with vi, and if you see a space between every two characters then you are looking at UTF-16 because there every two bytes make up one character. What you should see is that the characters don't have spaces between them, that's an indication for UTF-8.
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UTF8, UTF16, and UTF32
I am always reading things saying to write my source code in UTF-8 and stay way from other encodings, but it also seems like UTF-16 is an improved version of UTF-8. What is the difference between them, and is there any advantage to either one?
This should help :)
http://www.differencebetween.net/technology/difference-between-utf-8-and-utf-16/
Summary:
UTF-8 and UTF-16 are both used for encoding characters
UTF-8 uses a byte at the minimum in encoding the characters while UTF-16 uses two
A UTF-8 encoded file tends to be smaller than a UTF-16 encoded file
UTF-8 is compatible with ASCII while UTF-16 is incompatible with ASCII
UTF-8 is byte oriented while UTF-16 is not
UTF-8 is better in recovering from errors compared to UTF-16