utf | 易学教程

Who Teaches the CPU 'A..B..C'?

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问题 Excuse my idiotic question, but I can't seem to find even one satisfying answer from the internet. I mean we can see character 'X' displayed on the screen right from the PC's start screen. But how would the computer know that the bit patterns is translated to 'x'? Who gives such definitions? Is it the BIOS, the OS, the CPU or the display driver or the apps? 回答1: It depends at which moment, and with which operating system, and on which hardware. For Linux on a current x86 PC desktop: At early

javax mail: UTF-8 encoding issue

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问题 I have seen several questions about this, but none have solved my problem. I have a Chinese email with a pdf attachment. All the text is valid UTF-8 until it is included in the MultiPart email. Problem: The text in the email is garbage characters when it gets to the recipient. The email header shows it is not encoded correctly. I include both my code and the email header below: EDIT: I have fixed the properties issue. My bug remains Email Header > eturn-Path: <jstone@eee.com> >Received: from

Special characters in Extjs4?

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问题 How to get special characters like ČĆŠĐŽ working in Extjs4. I have tried adding meta utf-8..., also tried with !DOCTYPE html5, and XHTML 1.0 Transitional. Prefered index.html on sencha web page is : <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title id='title'>HTML Page setup Tutorial</title> <link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" /> <script type="text/javascript" src="../../adapter/ext/ext-base.js"></script>

UTF8 mysql encoded database, but not showing special characters in PHP

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问题 I have a database with utf_general_ci encoding in MySQL, when I insert data in Navicat or PhpMyAdmin and do queries there, the special characters are returned fine. But in a php variable they are showing like this: My database and collations: and in my html doc if it is a normal it shows the characters OK, it only not work when is a php variable please help me 回答1: Hei, Firstly be sure you have this meta in html tag <meta charset="UTF-8"> You can check also with this line in php, above you

How can I convert between hex NCRs and UTF-8 code units?

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问题 Example: the "large red circle" emoji 🔴 can be displayed in HTML using 🔴 But if I create a text file with that same emoji in it, save the file with UTF-8 encoding, and then examine it with a hex editor, I can see the emoji is represented with these four bytes: F0 9F 94 B4 . And that is a very different number. What's the formula to convert between the two representations? How does one derive 0xF09F94B4 from 0x1F534, and vice versa? 回答1: 1f534 refers to the Unicode code point. In binary it is:

Convert data from latin1_swedish to utf-8

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问题 I need to convert data from old database to new one. Old database was in latin1_swedish_ci collation and have content in cyrilic language like this <p>ÐÑ€Ñ…Ð¸ÐµÐ¿Ð¸ÑÐºÐ¾Ð¿ Ð¾Ñ…Ñ€Ð¸Ð´ÑÐºÐ¸ Ð¸ Ð¼Ð¸... This content with utf-8 enconding on page looks like this <p>Архиепископ охридски и митрополит скопски ... Which is fine. Now I need to convert all of this data into native UTF-8 content. No expirience with these, any sugg. Thanks 回答1: You can try this ALTER TABLE <tablename> CONVERT TO CHARACTER

Convert a string to a 'InvariantCulture'

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问题 I have the following string an-ca an-ca If you will look it closely you will see that they are different! To compare 2 string like this I found this solution: if (String.Compare(str1, str2, StringComparison.InvariantCulture) == 0) ... So I have 2 questions Way W3C did characters so are the same in different languages - so make problems of comparision How in C# I can convert the string to 'InvariantCulture' EDIT: This link may explain the problem better Thanks in advance 回答1: There are a lot

UTF-8 vs UTF8 in XML files

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问题 What is the correct UTF8 encoding declaration in XML files? I have seen both. <?xml version="1.0" encoding="UTF-8"?> ... or <?xml version="1.0" encoding="UTF8"?> ... 回答1: The XML specification (https://www.w3.org/TR/REC-xml/#charencoding), says: In an encoding declaration, the values " UTF-8 ", " UTF-16 ", " ISO-10646-UCS-2 ", and " ISO-10646-UCS-4 " should be used for the various encodings and transformations of Unicode / ISO/IEC 10646... Further, the value of "encoding" can be any value

Emacs Not Displaying Unicode on Reload

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问题 When I insert an — (em dash) into a text file, Emacs initially displays it fine. When I reload Emacs, all instances of — are displayed as \342\200\224. How can I get Emacs to display the characters as it did initially? I'm using Windows 7 and Emacs 24.3.1. The major mode is "Text" and minor is "Fill". 回答1: Try inserting this into your init file. It should make sure emacs saves files as Unicode (and reads them correctly afterwards). ;;;;;;;;;;;;;;;;;;;; ;;; set up unicode (prefer-coding-system

Can Unicode NFC normalization increase the length of a string?

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问题 If I apply Unicode Normalization Form C to a string, will the number of code points in the string ever increase? 回答1: Yes, there are code points that expand to multiple code points after applying NFC normalization. Within the Basic Multilingual Plane, for example, there are 70 code points that expand to 2 code points after applying NFC normalization, and there are 2 code points (U+FB2C and U+FB2D within the Alphabetic Presentation Forms block) that expand to 3 code points. One guarantee that