String Character Length: Difference between revisions
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In this task, the goal is to find the <em>character</em> length of a string. This means encodings like [[UTF-8]] need to be handled properly, as there is not necessarily a one-to-one relationship between bytes and characters. |
In this task, the goal is to find the <em>character</em> length of a string. This means encodings like [[UTF-8]] need to be handled properly, as there is not necessarily a one-to-one relationship between bytes and characters. |
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Line 59: | Line 60: | ||
char *p = (char *) string; |
char *p = (char *) string; |
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while (*p |
while (*p != '\0') length ; |
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return 0; |
return 0; |
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Line 93: | Line 94: | ||
} |
} |
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==[[C plus plus|C |
==[[C plus plus|C ]]== |
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[[Category:C plus plus|C |
[[Category:C plus plus|C ]] |
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'''Standard:''' [[ISO C plus plus|ISO C |
'''Standard:''' [[ISO C plus plus|ISO C ]] (AKA [[C plus plus 98|C 98]]): |
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'''Compiler:''' g |
'''Compiler:''' g 4.0.2 |
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#include <string> // note: '''not''' <string.h> |
#include <string> // note: '''not''' <string.h> |
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Line 124: | Line 125: | ||
'''Platform:''' [[.NET]] |
'''Platform:''' [[.NET]] |
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'''Language Version:''' 1.0 |
'''Language Version:''' 1.0 |
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string s = "Hello, world!"; |
string s = "Hello, world!"; |
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Line 195: | Line 196: | ||
Since Java 1.5, the actual number of characters can be determined by calling the codePointCount method. |
Since Java 1.5, the actual number of characters can be determined by calling the codePointCount method. |
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String str = "\uD834\uDD2A"; //U |
String str = "\uD834\uDD2A"; //U 1D12A |
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int length1 = str.length(); //2 |
int length1 = str.length(); //2 |
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int length2 = str.codePointCount(0, str.length()); //1 |
int length2 = str.codePointCount(0, str.length()); //1 |
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Line 208: | Line 209: | ||
var len1 = str1.length; //13 |
var len1 = str1.length; //13 |
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var str2 = "\uD834\uDD2A"; //U |
var str2 = "\uD834\uDD2A"; //U 1D12A represented by a UTF-16 surrogate pair |
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var len2 = str2.length; //2 |
var len2 = str2.length; //2 |
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