...e operation to produce some undefined result. For example, 0.0 divided by 0.0 is arithmetically undefined. Taking the square root of a negative number is also undefined. share | improve this ...

...he exceptions that vector::at() throws aren't really intended to be caught by the immediately surrounding code. They are mainly useful for catching bugs in your code. If you need to bounds-check at runtime because e.g. the index comes from user input, you're indeed best off with an if statement. So ...

... general, every time you need to allocate a resource, whether it's memory (by calling new), file handles, sockets or anything else, wrap it in a class where the constructor acquires the resource, and the destructor releases it. Then you can create an object of that type on the stack, and you're guar...

... Ran into issues with this solution - Incrementing by 1 failed for me at DST changeover point (move clock forward an hour). – andrewb Oct 2 '15 at 2:09 2 ...

... A quick note on C-a : syntax.... "All screen commands are prefixed by an escape key, by default C-a (that's Control-a, sometimes written ^a). To send a literal C-a to the programs in screen, use C-a a. This is useful when working with screen within screen. For example C-a a n will move scree...

...sion. Re. the formatting of chart labels, see the date_demo1 link provided by J. K. Seppänen. The matplot lib documentation is excellent, BTW. matplotlib.sourceforge.net/index.html – codeape Oct 19 '09 at 13:53 ...

... Changing the memory_limit by ini_set('memory_limit', '-1'); is not a proper solution. Please don't do that. Your PHP code may have a memory leak somewhere and you are telling the server to just use all the memory that it wants. You wouldn't have fixe...

... the two boils down to access. System environment variables are accessible by any process and Java system properties are only accessible by the process they are added to. Also as Bohemian stated, env variables are set in the OS (however they 'can' be set through Java) and system properties are pass...

... of the use of a character class and a single metacharacter is a bad idea, by the way, since the layer of abstraction can slow down the match, but this is only an implementation detail and only applies to a few of regex implementations. JavaScript is not one, but it does make the subpattern slightly...

... This approach of deriving an enum from an interface is used by the Java 1.7 API, e.g. java.nio.file.Files.write() takes an array of OpenOption as the last argument. OpenOption is an interface, but when we call this function we usually pass a StandardOpenOption enum constant, which is ...