2022年2月18日 · An encoding form maps a code point to a code unit sequence. A code unit is the way you want characters to be organized in memory, 8-bit units, 16-bit units and so on. UTF-8 uses one to four units of eight bits, and UTF-16 uses one or two units of 16 bits, to cover the entire Unicode of 21 bits maximum.

This Unicode encoding is a good choice because you can use a single character encoding to handle any character you are likely to need. This greatly simplifies things. This greatly simplifies things. Using Unicode throughout your system also removes the need to track and convert between various character encodings.

2010年3月19日 · You have a mismatch in your character encoding; your string is encoded in one encoding (UTF-8) and whatever is interpreting this page is using another (say ASCII). Always specify your encoding in your http headers and make sure this matches your framework's definition of encoding. Sample http header: Content-Type text/html; charset=utf-8

The only possibilities are that the text is accompanied by additional data that indicates the encoding used or the program requires (assumes) that the text has a particular encoding. Similarly, if a computer program must send (output) text to another program or a display device, it must either tell the destination the character encoding used or ...

The search for the best encoding always to some extent was in conflict with the need to use a common encoding that met many needs, even if somewhat incompletely. A brief history of character encoding is provided in Richard Gillam, Unicode Demystified, pp. 25-59. More and More Characters. 5-bit encodings; 6-bit encodings

2014年3月31日 · The x-user-defined encoding is a single-byte encoding whose lower half is ASCII and whose upper half is mapped into the Unicode Private Use Area (PUA). Like the PUA in general, using this encoding on the public Internet is best avoided because it damages interoperability and long-term use.

2014年9月4日 · The utf-8 encoding is the most appropriate encoding for interchange of Unicode, the universal coded character set. Therefore for new protocols and formats, as well as existing formats deployed in new contexts, this specification requires (and defines) the utf-8 encoding. The other (legacy) encodings have been defined to some extent in the past.

2011年3月27日 · An interesting point that was noted in the discussion of another answer (which I didn't really think the author needed to delete) is that there is a difference between a character set, which (in the other author's words - don't remember his username) defines a mapping between integers and characters (e.g. "Capital A is 65"), and an encoding ...

2015年6月5日 · O Python 2, como um caso especial, detecta a presença dessa linha e a usa para detectar o encoding do arquivo. Na ausência dessa linha, o Python entra num modo mais conservador, e só aceita caracteres ASCII (sem acento), lançando um erro se ele encontrar algum caractere “esquisito” (os detalhes desse mecanismo estão descritos na PEP ...

2019年4月23日 · Other applications often break when they read these odd Microsoft UTF-8 byte order encoding marks at the top of files. A perfect example of this problem was triggering quirsksmode in old IE web browsers when encoding in UTF-8 as browsers often displayed XHTML web pages based on what encoding falls at the …