surrogate-pairs | 易学教程

How to use unicode in Android resource?

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问题 I want to use this unicode character in my resource file. But whatever I do, I end with dalvikvm crash (tested with Android 2.3 and 4.2.2): W/dalvikvm( 8797): JNI WARNING: input is not valid Modified UTF-8: illegal start byte 0xf0 W/dalvikvm( 8797): string: '📡' W/dalvikvm( 8797): in Landroid/content/res/StringBlock;.nativeGetString:(II)Ljava/lang/String; (NewStringUTF) E/dalvikvm( 8797): VM aborting F/libc ( 8797): Fatal signal 11 (SIGSEGV) at 0xdeadd00d (code=1), thread 8797 (cz.ipex...) I

JavaScript strings outside of the BMP

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BMP being Basic Multilingual Plane According to JavaScript: the Good Parts : JavaScript was built at a time when Unicode was a 16-bit character set, so all characters in JavaScript are 16 bits wide. This leads me to believe that JavaScript uses UCS-2 (not UTF-16!) and can only handle characters up to U+FFFF. Further investigation confirms this: > String.fromCharCode(0x20001); The fromCharCode method seems to only use the lowest 16 bits when returning the Unicode character. Trying to get U+20001 (CJK unified ideograph 20001) instead returns U+0001. Question: is it at all possible to handle post

What are the most common non-BMP Unicode characters in actual use? [closed]

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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 5 years ago . In your experience which Unicode characters, codepoints, ranges outside the BMP (Basic Multilingual Plane) are the most common so far? These are the ones which require 4 bytes in UTF-8 or surrogates in UTF-16. I would\'ve expected the answer to be Chinese and Japanese characters

JavaScript strings outside of the BMP

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问题 BMP being Basic Multilingual Plane According to JavaScript: the Good Parts : JavaScript was built at a time when Unicode was a 16-bit character set, so all characters in JavaScript are 16 bits wide. This leads me to believe that JavaScript uses UCS-2 (not UTF-16!) and can only handle characters up to U+FFFF. Further investigation confirms this: > String.fromCharCode(0x20001); The fromCharCode method seems to only use the lowest 16 bits when returning the Unicode character. Trying to get U

What is a “surrogate pair” in Java?

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问题 I was reading the documentation for StringBuffer , in particular the reverse() method. That documentation mentions something about surrogate pairs . What is a surrogate pair in this context? And what are low and high surrogates? 回答1: The term "surrogate pair" refers to a means of encoding Unicode characters with high code-points in the UTF-16 encoding scheme. In the Unicode character encoding, characters are mapped to values between 0x0 and 0x10FFFF. Internally, Java uses the UTF-16 encoding

How to work with surrogate pairs in Python?

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问题 This is a follow-up to Converting to Emoji. In that question, the OP had a json.dumps() -encoded file with an emoji represented as a surrogate pair - \\ud83d\\ude4f . S/he was having problems reading the file and translating the emoji correctly, and the correct answer was to json.loads() each line from the file, and the json module would handle the conversion from surrogate pair back to (I\'m assuming UTF8-encoded) emoji. So here is my situation: say I have just a regular Python 3 unicode

What is a “surrogate pair” in Java?

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I was reading the documentation for StringBuffer , in particular the reverse() method. That documentation mentions something about surrogate pairs . What is a surrogate pair in this context? And what are low and high surrogates? The term "surrogate pair" refers to a means of encoding Unicode characters with high code-points in the UTF-16 encoding scheme. In the Unicode character encoding, characters are mapped to values between 0x0 and 0x10FFFF. Internally, Java uses the UTF-16 encoding scheme to store strings of Unicode text. In UTF-16, 16-bit (two-byte) code units are used. Since 16 bits can