If you're a programmer who lives in the 2003, you don't know the basics of character, character set, encoding, and Unicode. Then you must be careful, if I catch you, I will let you peel six months of onions in the submarine to punish you.
This vicious threat was first made by Joel Spolsky ten years ago. Unfortunately, many people think he's just joking, so there are still a lot of people who don't fully understand
Convert Unicode string to Chinese in Python3When crawling data with Python crawlers, it is sometimes found that crawling data is similar to"\U3010\U6F14\U5531\U4F1A\U30112000-\U62C9\U9614\U97F3\U4E50\U4F1A" Such a Unicode string, in the interactive environment of Python can be directly printed output to view the content;Print ("\u3010\u6f14\u5531\u4f1a\u30112000-\u62c9\u9614\u97f3\u4e50\u4f1a") "Concert " 2
As we know, C uses a char data type to represent a 8-bit ANSI character, and by default when a string is declared in the code, the C compiler converts the characters in the string into an array of 8-bit char data types:
Copy Code code as follows:
An 8-bit character
char c = ' A ';
An array of 8-bit character and 8-bit terminating zero
Char szbuffer[100] = "A String";
Microsoft's C + + compiler defines a built-in data type wchar_t, which represents a 16-bit
Before starting this article, I've already made a distinction between Unicode encoding (that is, code point) and Unicode encoding implementation. Otherwise, you will have no sense in the following.
History
We know that the ISO 10646 committee defines a super character set called Universal Character Set (UCS) to encompass all the writing systems in the world. Because the UCS is now encoded in 4 bytes, it is
Source:Elegant C ++(Emmett blog)
I 've been studying Unicode for a few days. I 've copied everything I 've seen. The article is pieced together, so it looks a bit messy :).
1. wprintfQ: sizeof (wchar_t) =?A: varies with the compiler. (So do not use wchar_t when cross-platform is required.) VC: sizeof (wchar_t) = 2;
Q: Why is there no result in directly using wprintf (L "test 1234") in VC?A: locale is not set.Setlocale (lc_all,
"
CHS
"
);
Wprintf (L
Unicode and JavaScriptNanyiDate: December 11, 2014Last month, I did a share, detailing the Unicode character set and the JavaScript language support for it. Here is the transcript of this share.First, what is Unicode?Unicode comes from a very simple idea: to include all the characters of the world in a single set, the
Last month, I did a share, detailing the Unicode character set and the JavaScript language support for it. Here is the transcript of this share.
First, what is Unicode?Unicode comes from a very simple idea: to include all the characters of the world in a single set, the computer can display all the characters as long as it supports this character set, and no m
Char is the underlying type of Java (the original type) and is a character type. Characters in Java are Unicode-encoded, so a Java character occupies 2 bytes, and the content of the character is stored in Unicode code values (binary numbers). The question is, how does the program convert Unicode code values to the program data we want? For example: Chinese charac
The string also has an encoding problem.Because a computer can only handle numbers, if you are working with text, you must convert the text to a number before processing it. The oldest computer was designed with 8 bits (bit) as a byte (byte), so the largest integer that a Word energy saver represents is 255 (binary 11111111 = decimal 255), and 0-255 is used to denote uppercase and lowercase letters, numbers, and some symbols. This Code table is called ASCII encoding, such as the code for capital
develop a long-term vision, then no matter what you set the encoding method, will not make the data generated garbled. Because, here is the universal code--unicode.
Well, the question is, how do we solve it? By experimenting, Jackson JSON actually has the ability to parse Unicode-encoded JSON data with the default settings. What is missing is the lack of steps to serialize the object. Fortunately, the Jac
VarThe following methods are commonly used in the conversion of such data to Chinese issues.1. Eval parsing or new Function ("' + str + ')" ()// "I am a Unicode encoding"2. Unescape parsing// "I am a Unicode encoding"Unicode Mini-Encyclopedia:In the field of computer science, Unicode (Uniform Code, universal Code, sing
ASCII is a character set, including uppercase and lowercase English letters, numbers, and control characters. It is represented in one byte and ranges from 0 to 127.
Because ASCII characters are very limited, each country or region puts forward its own character set on this basis. For example, gb2312, which is widely used in China, provides encoding for Chinese characters, it is expressed in two bytes.
These character sets are incompatible with each other. The same number may indicate diff
VC ++ 6.0 supports Unicode programming, but the default value is ANSI. Therefore, developers can easily write Unicode-Supported Applications by slightly changing the coding habits.
Using VC ++ 6.0 for Unicode programming mainly involves the following tasks:
1. Add Unicode and _ Uni
VC ++ 6.0 supports Unicode programming, but the default value is ANSI. Therefore, developers only need to change the programming
Code You can easily write Unicode-Supported Applications.
Program .
After installation: Copy mfc42u *. * under vc98/mfc/lib to the corresponding installation directory.
Add Unicode and _ Uni
Python original string and Unicode string operator usage Example Analysis, pythonunicode
This document describes the usage of the original Python string and Unicode string operators. We will share this with you for your reference. The details are as follows:
# Coding = utf8''' in the original string, all strings are used directly in the literal sense without escaping special or printable characters. Regular
I have just installed the PHP6 Dev version and decided to test the Unicode support for PHP6 's new feature-php. I'm not going to talk about the new features of PHP6 or Unicode, just the tests I did on Unicode.
The first thing to do is to have PHP6 support Unicode, which is modified in the php.ini file.
;;;;;;;;;;;;;;
that there are hundreds of languages all over the world, Japan to the Japanese Shift_JIS, South Korea to the Korean euc-kr, countries have the standard, it will inevitably conflict, the result is, in the text of the mixed language, the display will be garbled.
As a result, Unicode emerged. Unicode unifies all languages into a set of codes so that there is no more garbled problems.
The
Unicode NSIs is a natural choice for developing multi-language installation packages. However, Unicode NSIs is a derivative version of the official NSIs, And the development progress is bound to lag behind the official NSIs, which is mainly maintained by Jim. The latest official version is 2.45, while the Unicode version is still 2.42.
All those who have used N
1. Relationships between tchar, Unicode, Char, and wchar_t
It is often found that some people love to use standard ANSI functions such as strcpy, and some love to use the _ txxxx function. This problem has been very confusing. To ensure unification, it is necessary to clarify the relationship between them.
To understand these functions, you must write several character types. Not to mention Char. Let's talk about wchar_t first. Wchar_t is the data typ
Knowledge points:
1. Windows 98 only supports ANSI and can only develop applications for ANSI.
2. windows and later support both Unicode and ANSI, so you can develop applications for any type. However, you must understand that the kernel only processes Unicode. When the system processes ANSI, you need to first convert to Unicode and then pass it to the operating
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