Kept having to return here to look up pg_get_viewdef (how to remember that!!), so searched for a more memorable command… and got it: \d+ viewname You can see similar sorts of commands by typing \? at the pgsql command line. Bonus tip: The emacs command sql-postgres makes pgsql a lot more pleasant (edit, copy, paste, … Read more
The reason defining an external variable inside a function does not make sense is the following: When you declare a symbol extern, you are telling the compiler to link all such occurrences of this value into the same symbol. Any occurences of extern int i; in your program would link to the externally defined i. … Read more
I have a struct that contains a declaration like this one: No you don’t. That’s a syntax error. You’re looking for: void (*functions[256])(); Which is an array of function pointers. Note, however, that void func() isn’t a “function that takes no arguments and returns nothing.” It is a function that takes unspecified numbers or types … Read more
It’s declared inside a closure, which means it can only be accessed there. If you want a variable accessible globally, you can remove the var: $(function(){ value = “10”; }); value; // “10” This is equivalent to writing window.value = “10”;.
Things aren’t just black and white. At the very least, they’re also big and small, loud and quiet, blue and orange, grey and gray, long and short, right and wrong, etc. Interpreted/compiled is just one way to categorize languages, and it’s completely independent from (among countless other things) whether you call the same language a … Read more
The term routine derives from subroutine, which is a more common term in languages like BASIC where one actually creates SUBroutines. (BASIC actually had a difference between a SUBroutine and a FUNCTION, but nevertheless…) From the Wikipedia entry: In computer science, a subroutine (also called procedure, function, routine, method, or subprogram) is a portion of … Read more
Definition needed The code you have provided is non-standard. While you can provide initializers for const static int members directly in the class, you still need to provide separate definitions. It is weird, a kind of unexpected, but you are expected to write it like this: #include <algorithm> struct Foo { static const int A … Read more
Indeed, it’s one of these cases, where original meaning of the word was subverted and means something different than in popular usage. ‘Synchronisation’ in telecommunication means that receiver signals whenever it is ready to receive messages, and only after this signal the transmitter will start transmitting. When the transmitter is done with the message, it … Read more
The truth is in the standard (3.2 One definition rule) : No translation unit shall contain more than one definition of any variable, function, class type, enumeration type or template. […] Every program shall contain exactly one definition of every non-inline function or object that is used in that program; no diagnostic required. The definition … Read more
For Objective-C methods, the general practice is to put methods you wish to expose in the @interface section of the header file so other code can include only the .h and know how to interact with your code. Order-based “lazy declaration” works just like functions in C — you don’t have to declare a method … Read more