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How can I safely encode a string in Java to use as a filename?

...If collisions must be avoided, then simple replacement or removal of "bad" characters is not the answer either. Instead you want something like this. (Note: this should be treated as an illustrative example, not something to copy and paste.) char fileSep = '/'; // ... or do this portably. char es...
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Count characters in textarea

I want to count characters in a textarea, so I just made: 21 Answers 21 ...
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How to convert an enum type variable to a string?

...nversion to string: enum OS_type { Linux, Apple, Windows }; inline const char* ToString(OS_type v) { switch (v) { case Linux: return "Linux"; case Apple: return "Apple"; case Windows: return "Windows"; default: return "[Unknown OS_type]"; } } ...
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Best way to parseDouble with comma as decimal separator?

... The problem with NumberFormat is that it will silently ignore invalid characters. So if you try to parse "1,23abc" it will happily return 1.23 without indicating to you that the passed-in String contained non-parsable characters. In some situations that might actually be desirable, but I don't ...
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node.js execute system command synchronously

...2012: How to get STDOUT] var lib = ffi.Library(null, { // FILE* popen(char* cmd, char* mode); popen: ['pointer', ['string', 'string']], // void pclose(FILE* fp); pclose: ['void', [ 'pointer']], // char* fgets(char* buff, int buff, in) fgets: ['string', ['string', 'int','po...
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Windows batch: echo without new line

... faster is <nul set /p =Hello. set /p can't echo an equal sign as first character nor spaces/tabs. – jeb Aug 18 '11 at 18:23 ...
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Struct Constructor in C++?

...s. struct blocknode { unsigned int bsize; bool free; unsigned char *bptr; blocknode *next; blocknode *prev; blocknode(unsigned int sz, unsigned char *b, bool f = true, blocknode *p = 0, blocknode *n = 0) : bsize(sz), free(f), bptr(b), prev(p), ne...
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Pointers in C: when to use the ampersand and the asterisk?

...'t use the & operator for arguments corresponding to "%s" in scanf(): char str[STRING_LENGTH]; ... scanf("%s", str); Because of the implicit conversion, scanf() receives a char * value that points to the beginning of the str array. This holds true for any function called with an array expres...
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What is the difference between memmove and memcpy?

... memmove can handle overlapping memory, memcpy can't. Consider char[] str = "foo-bar"; memcpy(&str[3],&str[4],4); //might blow up Obviously the source and destination now overlap, we're overwriting "-bar" with "bar". It's undefined behavior using memcpy if the source and destin...
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Convert UTF-8 encoded NSData to NSString

...ver and I want to convert it to NSString for iPhone. Since data contains characters (like a degree symbol) which have different values on both platforms, how do I convert data to string? ...