unicode

unicode character set

由 萝らか妹 提交于 2020-05-06 03:23:35
为了不忘记以前看过的unicode规范。决定写此文章，以便于记忆。 UCS 4 byte1 首位为0， 2^7=128个group byte2 2^8=256个plane byte3 256 row byte4 256 cell group 0 plane0 为Basic Multilingual Plane （BMP). BMP去掉前面的两个字节 就等同于 UCS 2. Now Unicode 使用了17个plane, 一个 17*2^16个codepoint. 平面15 0xF0000 - 0xFFFFD 平面16 0x100000 - 0x10FFFD 这两个平面定义了大约2^17个码位，作为Private Use Area. PUA给大家自定义。 java里面的string是适用UTF16来表示的。 这里可以看出，BMP里面的字符码点小于2^16,完全可以使用两个字节表示。 BMP以外的字符如何来表示？BMP以外的字符的码点大于2^16，只能使用2个UTF16单位。 怎么区分BMP和BMP以外的字符？在BMP中，保留了0xE000 - 0xF8FF 0xD800-0xDFFF作为代理区。 使用代理区+一个UTF16单元，表示一个BMP以外的字符。 UTF8，16，32都是一种编码转换格式。 在java中，String使用UTF16编码格式。使用codepointAt

Unicode character 0x1 not being removed

由 安稳与你 提交于 2020-05-02 04:31:05
问题 I have the following code in order to remove ALL invalid Unicode characters before sending them in XML in a SOAP request. const invalidUnicodeRemoved = inputText.replace(/[\u0000-\u001F]/gm, ''); However, I keep getting the following error sending the XML: An invalid XML character (Unicode: 0x1) was found in the element content of the document. . So basically it has not been removed (or at least not all of them). Any ideas? 来源： https://stackoverflow.com/questions/45009271/unicode-character

七、MySQL中的字符集

由 夙愿已清 提交于 2020-04-30 20:52:54
什么是字符集？ 计算中的字符文字集合（每个自负文字分配一个对应的数字），将字符集中的文字符号进行编码以便于计算机识别处理。 字符编码就是如何在计算机中存储表示字符集中每个字符文字对应的数字。 发展历程 ASCII与字符集混乱时代 20世纪60年代初，美国标准化组织ANSI发布了第一个字符集 ASCII 后来演变成了国际标准 ISO-646。 ASCII采用7位编码，包含大小写英文字母、阿拉伯数字和标点以及33个控制符号。 之后制定的字符集大部分都兼容ASCII编码。 随后各国、个公司纷纷制定自己的字符集标准，比如：GBK、GB2312-80、ISO-8859系列等。到了20世界80年代，大家都崩溃了。。。这么多字符集很难进行软件国际化，然后大家就想着能不能统一字符编码。 Unicode 为了统一这个字符集，1984年ISO的一些成员国开始发起制定新的国际字符集标准，用来容纳世界各国的语言文字，然后UCS(ISO-10646)诞生了。 但是这个UCS遭到了美国很多计算机公司的反对，1988年联合微软、苹果、IBM、SUN等公司成立Unicode 协会，并于1991年推出Unicode1.0。 然后ISO和Unicode协会为了统一编码标准，1991年10月达成协议，ISO将Unicode编码并入UCS的0组0面中（简称为BMP，UCS编码划分为group、plane、row、cell

What is the best way to output Unicode to console?

由 核能气质少年 提交于 2020-04-16 02:47:51
问题 The bounty expires in 6 days . Answers to this question are eligible for a +50 reputation bounty. Luismi98 is looking for a canonical answer . I am working with C++17 in Visual Studio 2019. I have read a fair bit about encodings but I am still not very comfortable with them. I want to output UNICODE characters to screen. For that, I am using the following code #include <iostream> #include <fcntl.h> #include <io.h> std::wstring symbol{ L"♚" }; _setmode(_fileno(stdout), _O_WTEXT); std::wcout <<

R plots some unicode characters but not others

由 南笙酒味 提交于 2020-04-12 08:26:53
问题 our sysadmin just upgraded our operating system to SLES12SP1. I reinstalled Rv3.2.3 and tried to make plots. I use cairo_pdf and try to make a plot with the x-label being \u0298 i.e. the solar symbol, but it doesn't work: the label just comes out blank. For example: cairo_pdf('Rplots.pdf') plot(1, xlab='\u0298') # the x-label comes up blank dev.off() This used to work, but for some reason it does not anymore. It works with other characters, e.g. cairo_pdf('Rplots.pdf') plot(1, xlab='\u2113')

R plots some unicode characters but not others

由 拜拜、爱过 提交于 2020-04-12 08:25:52
问题 our sysadmin just upgraded our operating system to SLES12SP1. I reinstalled Rv3.2.3 and tried to make plots. I use cairo_pdf and try to make a plot with the x-label being \u0298 i.e. the solar symbol, but it doesn't work: the label just comes out blank. For example: cairo_pdf('Rplots.pdf') plot(1, xlab='\u0298') # the x-label comes up blank dev.off() This used to work, but for some reason it does not anymore. It works with other characters, e.g. cairo_pdf('Rplots.pdf') plot(1, xlab='\u2113')

javascript alt/fancy text generation [closed]

由 情到浓时终转凉″ 提交于 2020-04-11 01:44:02
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed last year . I am trying to understand how alt text/fancy text generation works. When I say alt text/fancy text, I mean: text like: 𝕖𝕩𝕒𝕞𝕡𝕝𝕖 𝕥𝕖𝕩𝕥 (Source) I've been searching for 40 minutes but I can't find anything on this. I am trying to make something in JavaScript, but I don't even know how

javascript alt/fancy text generation [closed]

由 耗尽温柔 提交于 2020-04-11 01:40:28
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed last year . I am trying to understand how alt text/fancy text generation works. When I say alt text/fancy text, I mean: text like: 𝕖𝕩𝕒𝕞𝕡𝕝𝕖 𝕥𝕖𝕩𝕥 (Source) I've been searching for 40 minutes but I can't find anything on this. I am trying to make something in JavaScript, but I don't even know how

c++字符集之间转换(UTF-8,UNICODE,Gb2312)

由 可紊 提交于 2020-04-09 12:08:44
UTF-8: 3字节一个字符 UNICODE: 2字节一个字符 GB2312: 1字节一个字符 例子： “你”字的UTF-8编码: E4 BD A0　　　　　　　　11100100 10111101 10100000 “你”的Unicode编码: 4F 60　　　　　　　　　 01001111 01100000 按照UTF-8的编码规则，分解如下：xxxx0100 xx111101 xx100000,把除了x之外的数字拼接在一起，就变成“你”的Unicode编码了。 注意UTF-8的最前面３个1，表示整个UTF-8串是由３个字节构成的。 经过UTF-8编码之后，再也不会出现敏感字符了，因为最高位始终为1。 类定义 class CChineseCode{ public: static void UTF_8ToUnicode(wchar_t* pOut,char *pText); // 把UTF-8转换成Unicode static void UnicodeToUTF_8(char* pOut,wchar_t* pText); //Unicode 转换成UTF-8 static void UnicodeToGB2312(char* pOut,wchar_t uData); // 把Unicode 转换成 GB2312 static void Gb2312ToUnicode(wchar

How to get the Unicode code point for a character in Javascript?

由 柔情痞子 提交于 2020-04-08 10:19:37
问题 I'm using a barcode scanner to read a barcode on my website (the website is made in OpenUI5). The scanner works like a keyboard that types the characters it reads. At the end and the beginning of the typing it uses a special character. These characters are different for every type of scanner. Some possible characters are: █ ▄ – — In my code I use if (oModelScanner.oData.scanning && oEvent.key == "\u2584") to check if the input from the scanner is ▄. Is there any way to get the code from that
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