TL;DR: On Python 3.3 you don’t have to do anything, just don’t put any __init__.py in your namespace package directories and it will just work. On pre-3.3, choose the pkgutil.extend_path() solution over the pkg_resources.declare_namespace() one, because it’s future-proof and already compatible with implicit namespace packages. Python 3.3 introduces implicit namespace packages, see PEP 420. This … Read more
Following code prints names of classes in specified namespace defined in current assembly. As other guys pointed out, a namespace can be scattered between different modules, so you need to get a list of assemblies first. string nspace = “…”; var q = from t in Assembly.GetExecutingAssembly().GetTypes() where t.IsClass && t.Namespace == nspace select t; … Read more
By default, use namespaced functions. Classes are to build objects, not to replace namespaces. In Object Oriented code Scott Meyers wrote a whole Item for his Effective C++ book on this topic, “Prefer non-member non-friend functions to member functions”. I found an online reference to this principle in an article from Herb Sutter: http://www.gotw.ca/gotw/084.htm The … Read more
\ (backslash) is the namespace separator in PHP 5.3. A \ before the beginning of a function represents the Global Namespace. Putting it there will ensure that the function called is from the global namespace, even if there is a function by the same name in the current namespace.
The “advantage” of from xyz import * as opposed to other forms of import is that it imports everything (well, almost… [see (a) below] everything) from the designated module under the current module. This allows using the various objects (variables, classes, methods…) from the imported module without prefixing them with the module’s name. For example … Read more
This ensures that resolution occurs from the global namespace, instead of starting at the namespace you’re currently in. For instance, if you had two different classes called Configuration as such: class Configuration; // class 1, in global namespace namespace MyApp { class Configuration; // class 2, different from class 1 function blah() { // resolves … Read more
I got it. Turns out that it requires \\ to escape the colon. $.get(xmlPath, {}, function(xml) { $(“rs\\:data”, xml).find(“z\\:row”).each(function(i) { alert(“found zrow”); }); }, “xml”); As Rich pointed out: The better solution does not require escaping and works on all “modern” browsers: .find(“[nodeName=z:row]”)
Globals in Python are global to a module, not across all modules. (Many people are confused by this, because in, say, C, a global is the same across all implementation files unless you explicitly make it static.) There are different ways to solve this, depending on your actual use case. Before even going down this … Read more
Most C++ users are quite happy reading std::string, std::vector, etc. In fact, seeing a raw vector makes me wonder if this is the std::vector or a different user-defined vector. I am always against using using namespace std;. It imports all sorts of names into the global namespace and can cause all sorts of non-obvious ambiguities. … Read more
The C++ Standard reads in section 7.3.1.1 Unnamed namespaces, paragraph 2: The use of the static keyword is deprecated when declaring objects in a namespace scope, the unnamed-namespace provides a superior alternative. Static only applies to names of objects, functions, and anonymous unions, not to type declarations. Edit: The decision to deprecate this use of … Read more