What is self join and when would you use it? I don't understand self joins so a layman explanation with an example would be great. ...

...callback: int event_cb_register(event_cb_t cb, void *userdata); This is what code would look like that registers a callback: static void my_event_cb(const struct event *evt, void *data) { /* do stuff and things with the event */ } ... event_cb_register(my_event_cb, &my_custom_data); ...

... Great example! No idea what it does though. An explanation what you are doing there, and how the decorator solves the problem would be very nice. – MeLight Jun 15 '14 at 16:00 ...

... :converter => Proc.new { |value| Money.new(value) } # ... What you'll get: Without any extra changes, all of your forms will show dollars and cents, but the internal representation is still just cents. The forms will accept values like "$12,034.95" and convert it for you. There's ...

...; they're different kinds of things. Also, since the bits are only 0 or 1, what would -1 even be? Really, we're working in the ring of polynomials with coefficients in the field $Z/2Z$, which only has two elements, 0 and 1, and where $1+1=0$. By putting the cofficients be in a field, then the polyno...

What does Weak Head Normal Form (WHNF) mean? What does Head Normal form (HNF) and Normal Form (NF) mean? 6 Answers ...

...lates which take templates as parameters) to do policy-based class design. What other uses does this technique have? 10 Ans...

... What happens When the user views a form to create, update, or destroy a resource, the Rails app creates a random authenticity_token, stores this token in the session, and places it in a hidden field in the form. When the use...

I've heard people referring to this table and was not sure what it was about. 14 Answers ...

... While what Jon says is completely correct, and a very valid point, I have to concur that the question AS ASKED is about if they are the already asking for all columns. Because of this part of the question, the real issues is fragil...