reference

问题 I have a list of items: my_list = ['first', 'second', 'third'] I need to convert this items into a dictionary (so I can access each element by it's name), and associate multiple counters to each element: counter1, counter2, counter3. So I do the following: counter_dict = {'counter1': 0, 'counter2': 0, 'counter3': 0} my_dict = dict(zip(mylist, [counter_dict]*len(mylist))) This way I obtain a nested dictionary { 'first': { 'counter1': 0, 'counter2': 0, 'counter3': 0 }, 'second': { 'counter1': 0

问题 I am currently developing a GTK# application which will use a component to view a web page and make connection to an FTP server. So I found these two libraries, Webkit for viewing the web page and gFTP for the FTP connection. Now I've added the packages using Synaptic Package Manager. And the package references are added to a folder called '/usr/lib/pkconfig/'. Apparently this should add the libraries to the references-list I can use from in MonoDevelop, but neither of them show up. =/ I

问题 According to the documentation of the == operator in MSDN, For reference types other than string, == returns true if its two operands refer to the same object. But, to be honest, I never check if two references are the same with == . I prefer using ReferenceEquals(obj1, obj2) and so do the default override of the Equals function. Therefore, in my projects, when the == operator is used on other types than string, equals to a bug. Is there a way to trigger a warning/error through Visual Studio

问题 I an trying to create an XSD, to define complex types to be referenced in other XSDs. So far so good. Within this XSD (playlist.xsd) I have one main complexType "playlistType". I want the playlistType to be able to contain multiple instances of an element of type 'secondaryEventType', which I am trying to define as a separate complexType within the same XSD file. However, when I come to try to create the 'secondaryEvent' element within the 'playlistType' I am continuously getting the error

问题 I have a namespace in which I'd like to define a class. The class is rather complex so I'd rather define it in a separate header file, but even the simplest code gives me an "undefined reference" error. main.cpp #include <iostream> namespace A { #include "C.hpp" } int main() { A::C foo; std::cout << foo.member << std::endl; return 0; } C.hpp class C { public: C(); int member; } C.cpp C::C() { this->member = 10; } When I run g++ C.cpp main.cpp I get "main.cpp:(.text+0x10): undefined reference

问题 I have a namespace in which I'd like to define a class. The class is rather complex so I'd rather define it in a separate header file, but even the simplest code gives me an "undefined reference" error. main.cpp #include <iostream> namespace A { #include "C.hpp" } int main() { A::C foo; std::cout << foo.member << std::endl; return 0; } C.hpp class C { public: C(); int member; } C.cpp C::C() { this->member = 10; } When I run g++ C.cpp main.cpp I get "main.cpp:(.text+0x10): undefined reference

问题 This question already has answers here : Could not load file or assembly 'System.Web.Helpers, error on IIS 8 (11 answers) Closed 5 years ago . The web application is working fine in my VS2010, but when I hosted it on server it shows error below Could not load file or assembly 'System.Web.Helpers' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded. 回答1: Sounds as MVC has not been installed on the server. and The dll is

问题 This question already has answers here : Could not load file or assembly 'System.Web.Helpers, error on IIS 8 (11 answers) Closed 5 years ago . The web application is working fine in my VS2010, but when I hosted it on server it shows error below Could not load file or assembly 'System.Web.Helpers' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded. 回答1: Sounds as MVC has not been installed on the server. and The dll is

问题 I have a class where in a specific case some of its attributes need to reference an external variable. I managed to do in this way, but is there a better way? #include "Vector.h" class LineSeg { private: Vector* a; Vector* b; bool owns; public: LineSeg(){ a = new Vector(); b = new Vector(); owns = true; } LineSeg(Vector ap, Vector bp){ a = new Vector(ap); b = new Vector(bp); owns = true; } LineSeg(Vector &ap, Vector &bp, bool owns){ a = &ap; b = &bp; owns = false; } virtual ~LineSeg(){ if

问题 I'm trying to create a application using Windows Forms in C#, however I keep getting an error stating: NullReferenceException was unhandled - Object reference not set to an instance of an object It's pointing to the line which has this code on: carBootSaleList.AddCarBootSale(newCarBootSale); The method I have on the forms interface: CarBootSaleList carBootSaleList; public void AddCarBootSale() { AddNewCarBootSale addForm = new AddNewCarBootSale(); if (addForm.ShowDialog() == DialogResult.OK)