...ires STATE to be set, but STATE="" (an empty string) is OK — not exactly what you want, but the alternative and older notation. The second variant (using :?) requires DEST to be set and non-empty. If you supply no message, the shell provides a default message. The ${var?} construct is portable bac...

What is the difference between syntax and semantics in programming languages (like C, C++)? 10 Answers ...

...nd describes its type, be it a type, object, or function. A declaration is what the compiler needs to accept references to that identifier. These are declarations: extern int bar; extern int g(int, int); double f(int, double); // extern can be omitted for function declarations class foo; // no ext...

...'xmlcharrefreplace') Don't forget to decode data to unicode first, using whatever encoding it was encoded. However in my experience that kind of encoding is useless if you just work with unicode all the time from start. Just encode at the end to the encoding specified in the document header (utf-...

What technology goes in behind the screens of Amazon recommendation technology? I believe that Amazon recommendation is currently the best in the market, but how do they provide us with such relevant recommendations? ...

What's the difference when using GET or POST method? Which one is more secure? What are (dis)advantages of each of them? ...

... What Assaf said is correct. There is a built in function in PHP to do exactly that. substr_compare($str, $test, strlen($str)-strlen($test), strlen($test)) === 0; If $test is longer than $str PHP will give a warning, so you...

What does it mean when you add the static keyword to a method? 9 Answers 9 ...

...or means more than or equal to, but I've seen => in some source code. What's the meaning of that operator? 13 Answers ...

What is the best comment in source code you have ever encountered? 518 Answers 518 ...