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Best way to serialize an NSData into a hexadeximal string

... string of NSData. Empty string if data is empty. */ const unsigned char *dataBuffer = (const unsigned char *)[self bytes]; if (!dataBuffer) return [NSString string]; NSUInteger dataLength = [self length]; NSMutableString *hexString = [NSMutableString stri...
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Using backticks around field names

...backticks, I would assume it lets you get away with ridiculous stuff like SELECT `id`, `my name`, `another field` , `field,with,comma` Which does of course generate badly named tables. If you're just being concise I don't see a problem with it, you'll note if you run your query as such EXPLA...
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Example JavaScript code to parse CSV data

...= $.csv.toArrays(csv, { delimiter: "'", // Sets a custom value delimiter character separator: ';', // Sets a custom field separator character }); Update 2: It now works with jQuery on Node.js too. So you have the option of doing either client-side or server-side parsing with the same library. U...
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const char *, char const *, char * const 异同?const修饰符各位置有何区...

const char *, char const *, char * const 异同?const修饰符各位置有何区别?const char * p = new char('a'); 这个是常字符,即p的内容不能被修改。char const * p 意义同上,没有区别。 这时,*...const char * p = new char('a'); 这个是常字符,即p的内容...
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strdup() - what does it do in C?

...'s a POSIX thing), it's effectively doing the same as the following code: char *strdup(const char *src) { char *dst = malloc(strlen (src) + 1); // Space for length plus nul if (dst == NULL) return NULL; // No memory strcpy(dst, src); // Copy the characters...
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string.Join on a List or other type

...le<T>) If you can't upgrade, you can achieve the same effect using Select and ToArray. return string.Join(",", a.Select(x => x.ToString()).ToArray()); share | improve this answer ...
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Unmangling the result of std::type_info::name

...clude <string> #include <typeinfo> std::string demangle(const char* name); template <class T> std::string type(const T& t) { return demangle(typeid(t).name()); } #endif In file type.cpp (requires C++11) #include "type.hpp" #ifdef __GNUG__ #include <cstdlib> #in...
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iterating over each character of a String in ruby 1.8.6 (each_char)

I am new to ruby and currently trying to operate on each character separately from a base String in ruby. I am using ruby 1.8.6 and would like to do something like: ...
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How can I validate a string to only allow alphanumeric characters in it?

...n I validate a string using Regular Expressions to only allow alphanumeric characters in it? 10 Answers ...
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What does int argc, char *argv[] mean?

...ention, but they can be given any valid identifier: int main(int num_args, char** arg_strings) is equally valid. They can also be omitted entirely, yielding int main(), if you do not intend to process command line arguments. Try the following program: #include <iostream> int main(int argc,...