Http://www.ruanyifeng.com/blog/2007/10/ascii_unicode_and_utf-8.html**************************NanyiDate: October 28, 2007Today at noon, I suddenly want to understand the relationship between Unicode and UTF-8, so I began to search the Internet information.As a result, the problem was more complicated than I thought, and it was only after lunch that I saw 9 o'clock at night.Here is my notes, mainly used to organize their own ideas. But I try to be easy
Generally speaking, Unicode encoding systems can be divided into two levels: encoding mode and implementation mode.
1.Encoding Method
Unicode is a character encoding scheme developed by international organizations to accommodate all texts and symbols in the world. Unicode maps these characters with numbers 0-0x10ffff. It can contain up to 1114112 characters, or c
Today at noon, I suddenly want to understand the relationship between Unicode and UTF-8, so I began to search the Internet information.As a result, the problem was more complicated than I thought, and it was only after lunch that I saw 9 o'clock at night.Here is my notes, mainly used to organize their own ideas. But I try to be easy to write and I hope to be useful to other friends. After all, character coding is the cornerstone of computer technology
I suddenly wanted to figure out the relationship between Unicode and UTF-8, so I began to look up information online. As a result, the problem was more complicated than I thought, and it was only after lunch that I saw 9 o'clock at night.Here is my notes, mainly used to organize their own ideas. But I try to be easy to write and I hope to be useful to other friends. After all, character coding is the cornerstone of computer technology, and to be profi
Recently in the development of input Method program encountered a small problem, is to delete a emoji, can not be deleted once, you need to perform two operations. Intuitively, this must be the Java operation Unicode character problem, so find the official Java document reference, solve the problem, here to do a simple summary. The original is here, interested to see for themselves.Http://www.oracle.com/technetwork/articles/java/supplementary-142654.h
UTF code
The UTF-8 is to encode the UCS in 8-bit units. The encoding method from UCS-2 to UTF-8 is as follows:
UCS-2 encoding (16-in-system)
UTF-8 byte stream (binary)
0000-007f
0xxxxxxx
0080-07ff
110xxxxx 10xxxxxx
0800-ffff
1110xxxx 10xxxxxx 10xxxxxx
For example, the Unicode encoding of the word "Han" is 6c49. 6c49 between 0800-FFFF, so be sure to use the 3-byte template: 1110xxxx 10xxxxxx 10xxxxxx. The 6c49 is written as binary: 0110 110001 001001,
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New Features of PhP6: Unicode and textiteratorAddress: http://blog.makemepulse.com/2008/03/13/php6-unicode-and-textiterator-
I just inst
Transfer from http://www.ruanyifeng.com/blog/2007/10/ascii_unicode_and_utf-8.htmlToday at noon, I suddenly want to understand the relationship between Unicode and UTF-8, so I began to search the Internet information.As a result, the problem was more complicated than I thought, and it was only after lunch that I saw 9 o'clock at night.Here is my notes, mainly used to organize their own ideas. But I try to be easy to write and I hope to be useful to oth
Today at noon, I suddenly want to understand the relationship between Unicode and UTF-8, so I began to search the Internet information.As a result, the problem was more complicated than I thought, and it was only after lunch that I saw 9 o'clock at night.Here is my notes, mainly used to organize their own ideas. But I try to be easy to write and I hope to be useful to other friends. After all, character coding is the cornerstone of computer technology
1.1. Question ProblemYou need to deal with data, doesn ' t fit in the ASCII character set.You need to handle data that is not suitable for the ASCII character set.1.2. Resolve SolutionUnicode strings can be encoded in plain strings in a variety of ways, according to whichever encoding you choose:Unicode strings can be encoded in a number of ways as normal strings, according to the encoding you choose (encoding):1#将Unicode转换成普通的Python字符串: "Encoding (en
At noon today, I suddenly wanted to figure out the relationship between Unicode and UTF-8, so I began to look up information online.As a result, this problem is more complicated than I thought. After lunch, we can see that the problem is fixed at AM.Below are my notes, mainly used to sort out my own ideas. However, I try to make it easy to understand and hope it can be useful to other friends. After all, character encoding is the cornerstone of comput
Character encoding ASCII, Unicode and UTF-8, asciiutf-8
Http://blog.csdn.net/pipisorry/article/details/42387045
ASCII code
The ASCII code consists of A total of 128 characters. For example, the SPACE is 32 (Binary 00100000), and the uppercase letter A is 65 (Binary 01000001 ). These 128 symbols (including 32 control symbols that cannot be printed) only occupy the last seven digits of one byte, and the first one digit is set to 0.
Non-ASCII Encoding
I
Python's coding problems should be plagued by every child's shoe that writes Python code.Python2 and Python3 's default encoding is different, so it is necessary to find out, otherwise search on the internet a bunch of answers a try, or quite a waste of time.first of all, the Python 2.x str
s = "I'm not garbled"
S is a string that itself stores a byte code (bytes).So what is the format of this byte code?If this code is entered on the interpreter, then the S format is the interpreter's encoding
Re-understanding Unicode and UTF8 encoding
Until today, to be exact, I just realized that UTF-8 encoding and Unicode coding are not the same, and that there is a difference between embarrassingThere is a certain connection between them, to see the difference between them:The length of the UTF-8 is not necessarily, it may be 1, 2, 3 bytesUnicode length must be 2 bytes (USC-2)UTF-8 can convert to and from
Methods of processing str and Unicode in Python2015/03/25 ·Basic Knowledge ·3 Reviews · Pythonshare to: Source: liuaiqi627 's BlogIt is a headache to deal with Chinese in python2.x. Write this article on the net, the measurement is not homogeneous, and will be a bit wrong, so here intends to summarize an article.I will also learn in the future, and constantly revise this blog.This assumes that the reader already has the basic knowledge associated with
Question one:
Use the Save As for Windows Notepad to convert between GBK, Unicode, Unicode big endian, and UTF-8 encoding methods. Also is TXT file, how does Windows recognize the encoding way?
I found out earlier that Unicode, Unicode big endian and UTF-8 encoded TXT files are preceded by a few more bytes, namely FF
1. Review of three types of codes
ANSI string we are most familiar with, English occupies one byte, Chinese characters 2 bytes, ending with a \ 0, commonly used in TXT text files.Unicode string. Each character (Chinese character or English letter) occupies 2 bytes. In the VC ++ world, Microsoft prefers Unicode, such as wchar_t.Utf8 is a form of Unicode compression. English A is expressed as 0x0041 in
PHP how to achieve Unicode and Utf-8 encoding mutual conversion, unicodeutf-8. PHP how to achieve Unicode and Utf-8 encoding mutual conversion, unicodeutf-8 recently happens to use unicode encoding conversion, go to check the php library function, did not find a function can be on PHP how Unicode and Utf-8 encoding mut
3-character encoding model
Programmers often face complex problems, and the simplest way to reduce complexity is to divide and conquer them. Peter Constable describes the four-layer model of Character encoding in his article "character set encoding basics Understanding Character set encodings and legacy encodings. I think this statement can clearly show what happened in character encoding, so I will introduce it here.3.1 character range (Abstract character repertoire)
The first layer of charac
The previous article takes you to the visual studio--takes you out of the pit Dad's runtime library pit helps us understand the various types of C/s + + runtime libraries in Windows and its ins and outs, which is a particularly easy place to go astray in C + + development, We summarized and summed it up. In this article we will continue to explain another concept that is easily confused in C + + development-multibyte character sets and Unicode charact
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