unicode envelope

The representation of a string inside Python is Unicode encoding, so in encoding conversion, it is usually necessary to use Unicode as the intermediate encoding, that is, decoding the other encoded string (decode) into Unicode first. From Unicode encoding (encode) to another encoding.The default encoding of the string

Today, using Unicode as a string is a common sense, but it's still a headache for some programming languages with a long history. Without the support of a third-party library, C + + does not actually support Unicode effectively, even if it is UTF8. (Note: This article discusses the encoding scheme of strings in memory, not file or network traffic.) ）When the STL's string template is born,

This article describes how to use Unicode encoding in Python2.x. Unicode in Python3 is used as the default encoding, unicode in the Python2 version, which is still widely used, is a place to pay attention to during use. For more information, see Unicode and Python, however, I plan to write something about them to facil

> Unicode is commonly used in the UCS-2, it uses two bytes to encode a character, such as the Chinese character "warp" encoding is 0X7ECF, 0X7ECF converted to decimal is 32463,ucs-2 with two bytes to encode characters, 2 16 is equal to 65536, so ucs- 2 can encode a maximum of 65,536 characters. Encoding from 0 to 127 characters like ASCII-encoded characters, such as the letter "a" Unicode encoding is 0x006

Character encoding: ASCII, Unicode, UTF-8, gb2312 1. ASCII code We know that in a computer, all information is eventually represented as a binary string. Each binary bit has two states: 0 and 1. Therefore, eight binary bits can combine 256 states, which is called a byte ). That is to say, a single byte can be used to represent 256 different States. Each State corresponds to one symbol, that is, 256 symbols, from 0000000 to 11111111. In the 1960s

historical annotations. Before Unicode, there was a separate character encoding system for each language, and each system used the same number (0-255) to represent the characters of the language. Some languages (like Russian) have several conflicting criteria for how to represent the same characters, and others (like Japanese) have too many characters and require multiple character sets. It is difficult to document communication between systems becaus

In the past two days, I took the time to summarize/sort out the actual encoding methods and usage of various encodings in Java applications. I will record them here for future reference. In order to form a complete understanding and in-depth understanding of text encoding, in order to deal with various problems encountered during Java development, especially the garbled problem, I think it is better to make up a series to describe and analyze, including three articles: First Article: Java charac

VC++6.0Unicode programming is supported, but the default value is ANSI. developers can easily write UNICODE-Supported Applications by slightly changing the coding habits. UseVC++6.0Unicode programming mainly involves the following tasks: 1. Add UNICODE and _ UNICODE preprocessing options for the project. Specific steps: open [project]-> [settings…] In the "pre-pr

Summary of Unicode, ANSI character set, and related string operationsQ How to display Unicode stringsAIf the program defines _ Unicode macro, directly useWchar * STR = l "unicodestring ";Textout (0, 0, STR );Otherwise, the conversion type is required.# Include Wchar * STR = l "unicodestring ";Bstr_t str1 = STR;Textout (0, 0, (char *) str1 );Q how to convert ANSI

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,

I.ANSIAnd Unicode ANSICharacters andUnicodeCharacterThe ANSI character type is Char, pointing to the string pointer pstr (lpstr), pointing to a constant string pointer pcstr (lpcstr ); the corresponding windows-defined UNICODE character type is wchar (typedef wchar wchar_t), pointing to the Unicode string pointer pwstr, pointing to a constant

Unicode and Utf-8 in Python The history of the character set mentioned in this article is a brief explanation of the relationship between Unicode and Utf-8, briefly summarizing:Utf-8 and Utf-16, Utf-32 is a class, the realization of the function is the same, but the most widely used utf-8, but Unicode and utf-8 is not the same class,

absrtact : When writing Python scripts, if we use Python to process Web page data or work with Chinese characters, this error message often occurs: syntaxerror:non-ascii character ' \ Xe6 ' in file./filename.py of Line 3, but no encoding declared. This article focuses on issues related to Unicode and Chinese, and special character encoding in Python. What rules should be followed for character encoding and decoding. Objective: If the password domain

Http://www.cnblogs.com/cy163/archive/2007/05/31/766886.htmlUnicode,gbk,utf-8 differencesIn simple terms, UNICODE,GBK and five yards are encoded values, and utf-8,uft-16 is the expression of this value. And the preceding three kinds of coding is a compatible, the same Chinese character, that three code value is completely different. such as "Han" Uncode value and GBK is not the same, assuming that Uncode is A040,GBK for b030, and Uft-8 code, that is, t

In the front-end development, in order to make Chinese in different environments can be very good display, is generally translated into Unicode format, that is, u4f60, such as: "Hello," The Unicode code for "u4f60u597du554a." JS to convert Chinese to Unicode encoding is very simple. JS Code:function Convert2unicode (str) {Return Str.replace (/[u0080-uffff]/g,Fu

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

Click here to view the original article The biggest advantage of Unicode is that there is only one character set. In other words, a program using Unicode character encoding can be compiled in any country's compiling environment without being considered garbled, it can also display characters normally in the editing environment of any language, rather than garbled characters. Does

Introduction If you live in Eastern Europe, Japan or the Middle East, and you write computer programs, you are probably familiar with Unicode. if you are writing programs in Visual C ++/MFC, then you probably have experienced some of the problems with trying to write code that runs under Unicode and ASCII. this article shocould help clear up some of the confusion. the principles here will work for any

In SQL Server databases, data types are divided into two categories, Unicode data types and non-Unicode data types. In general, if the information stored in the database has multiple languages, I recommend that you use Unicode data types instead of non-Unicode data types. First, the reasons for using