containers

I have a JLabel in a Container. The defaut size of the font is very small. I would like that the text of the JLabel to take the maximum size. How can I do that? coobird Not the most pretty code, but the following will pick an appropriate font size for a JLabel called label such that the text inside will fit the interior as much as possible without overflowing the label: Font labelFont = label.getFont(); String labelText = label.getText(); int stringWidth = label.getFontMetrics(labelFont).stringWidth(labelText); int componentWidth = label.getWidth(); // Find out how much the font can grow in

I am trying to build a heap with a custom sort predicate. Since the values going into it are of 'user-defined' type, I cannot modify their built-in comparison predicate. Is there a way to do something like: h = heapq.heapify([...], key=my_lt_pred) h = heapq.heappush(h, key=my_lt_pred) Or even better, I could wrap the heapq functions in my own container so I don't need to keep passing the predicate. jsbueno According to the heapq documentation , the way to customize the heap order is to have each element on the heap to be a tuple, with the first tuple element being one that accepts normal

Every standard container has a begin and end method for returning iterators for that container. However, C++11 has apparently introduced free functions called std::begin and std::end which call the begin and end member functions. So, instead of writing auto i = v.begin(); auto e = v.end(); you'd write using std::begin; using std::end; auto i = begin(v); auto e = end(v); In his talk, Writing Modern C++ , Herb Sutter says that you should always use the free functions now when you want the begin or end iterator for a container. However, he does not go into detail as to why you would want to.