namespaces

问题 sorry for the long and confusing title, but I couldn't think of a better way to ask this. So, what I have is a class: template <typename T> class Set { public: //random member functions here private: struct Node{ T key; Node *right; Node *left; int height; }; public: Node* r_add(Node *temp); }; Node* Set<T>::r_add(Node *temp) { return temp; } When I try to implement the function r_add, I keep getting the error that the return type of out-of-line definition differs from that in the declaration

问题 I'm using BoostPython for embedding Python in my C++ project but I don't understand all stuffs about Python, especially the namespace system. Actually, I used this code: byte_code = Py_CompileString(filedata, filename, Py_file_input); // [...] PyObject* res = NULL; PyObject* main_module = PyImport_AddModule("__main__"); PyObject* global_dict = PyModule_GetDict(main_module); PyObject* local_dict = PyDict_New(); py::object local_namespace(py::handle<>(py::borrowed(local_dict))); // Set a user

问题 I'm trying to wrap my head around namespaces and recursion in XSD and I feel lost. Error: The QName value 'topic' does not resolve to a(n) element declaration Most important part is divided with whitelines, just learning xsd but I need it for one of my assignments, so please, take it easy... Code (I tried to follow this link: Recursive element in XML , unluckily no results): <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name='xmap-content'> <xs:complexType> <xs:sequence>

问题 While scanning some library code today, I've seen it several times: Instead of declaring a Namespace\Like\This , it's Done\\Like\\This . Could somebody please enlighten me – whats the reason behind this? All I can images that it's either something framework specific (which I don't believe), or it's a strange form of escaping that I don't understand. 回答1: You should use double backslash when you're referencing the class name in a string, eg: $className = "Foo\\Bar". This is prevent the

问题 While scanning some library code today, I've seen it several times: Instead of declaring a Namespace\Like\This , it's Done\\Like\\This . Could somebody please enlighten me – whats the reason behind this? All I can images that it's either something framework specific (which I don't believe), or it's a strange form of escaping that I don't understand. 回答1: You should use double backslash when you're referencing the class name in a string, eg: $className = "Foo\\Bar". This is prevent the

问题 This question originates from my previous question Why do fully qualified names have to be used when dynamically assessing namespaced elements? and another question Use php namespace inside function. Both of these questions boil down to the following explanation by php.net: Importing is performed at compile-time, and so does not affect dynamic class, function or constant names.... ....The use keyword must be declared in the outermost scope of a file (the global scope) or inside namespace

问题 I am trying to run a widget on a web page that leverages the Q library . Unfortunately, the page also uses the AddThis widget which embeds require.js and is causing a conflict. Specifically, when run together the two following error messages are displayed in the console: Uncaught ReferenceError: Q is not defined Uncaught Error: Mismatched anonymous define() module Unfortunately, I don't have control over the use of the AddThis widget. However, I do have control over the embedded application

问题 I'm having trouble using the "shinyFilesButton()" and "shinyFilesChoose()" functionality within modules in R shiny. I believe my issue is related to the namespace functions ("ns()") that effectively create new, unique ids within the modules. Where do I put the ns() call within the shinyFiles functions? How do I handle this issue on the server side? I've mocked up an example, with code shown below. The app just selects a file and tells you the info on what you selected. Note that currently no

问题 I know what namespace is for but I'm not sure how the structure of a programs should be when using namespaces. 1- Do you use the same namespace name for all related classes in a program or do you use different namespace for each class? 2- If a unique namespace is more common, is it common to use the same name as the class? Can some one give me some general advice on how namespace is used in C# ? Example using the same namespace name: // Main program using System; using Zoo; public class

问题 In python, why do loop variables overwrite already defined global variables? It seems counterintuitive that a loop variable is put into the module's global namespace rather than a new local namespace just for the loop. Here's an example that shows what I'm talking about: c = 3.14 print("before loop c = {}".format(c)) for c in range(3): print("in loop c = {}".format(c)) print("after loop c = {}".format(c)) Running this code will print out: before loop c = 3.14 in loop c = 0 in loop c = 1 in