duplication

Apologies if this is a dumb question, but if I create 2 modules that both require('http') and my main application that requires both modules, or requires modules that in turn require both modules, while also requiring 'http' for its own purposes, do I end up with three instances of the http module, each locked within the scope of a different closure, or does node rewrite things to avoid this? In other words, do I end up with an app that has: // main app creates a closure containing a local instance of http, an instance of proxy1 // and an instance of proxy2, both of which are functions

Is there an efficient (fast) algorithm that will perform bit expansion/duplication? For example, expand each bit in an 8bit value by 3 (creating a 24bit value): 1101 0101 => 11111100 01110001 11000111 The brute force method that has been proposed is to create a lookup table. In the future, the expansion value may need to be variable. That is, in the above example we are expanding by 3 but may need to expand by some other value(s). This would require multiple lookup tables that I'd like to avoid if possible. There is a chance to make it quicker than lookup table if arithmetic calculations are

If 2 other app register same url scheme, how iOS handle this? It will present an UIActionSheet view allowing the user to choose which app to launch (good example are apps that handle .doc files). That's where the icon you specify is used - on the action sheet buttons when it's shown to the user The iOS Documentation reads: Note: If more than one third-party app registers to handle the same URL scheme, there is currently no process for determining which app will be given that scheme. The OSs behaviour is undefined if there are two apps registered for an URL scheme, therefore you should try to

There is a Duplicate command in the Edit Menu (with a default shortcut of ⌘ D ), but it is (as Halley pointed out) meant for duplication in the Interface Builder part of Xcode. So, how do you ( easily ) duplicate a line in Xcode 4? Related question (with a working answer) for Xcode 3 ... and which does not work for Xcode 4. Why not just copy & paste? Because it is tedious and entails too much hand-acrobatics: either (1) : moving to line beginning and then pressing ⇧^E , then copying with ⌘C , moving to new line, alligning cursor, and finally pasting with ⌘V ; or (2) : ^A (set cursor to line