class

问题 Sec. 3.4.3/3 said: In a declaration in which the declarator-id is a qualified-id, names used before the qualified-id being declared are looked up in the defining namespace scope; names following the qualified-id are looked up in the scope of the member’s class or namespace. There is a code example from 3.4.3/3 N3797: class X { }; class C { class X { }; static const int number = 50; static X arr[number]; }; X C::arr[number];// ill-formed: // equivalent to: ::X C::arr[__C::number__]; // not to:

问题 Sec. 3.4.3/3 said: In a declaration in which the declarator-id is a qualified-id, names used before the qualified-id being declared are looked up in the defining namespace scope; names following the qualified-id are looked up in the scope of the member’s class or namespace. There is a code example from 3.4.3/3 N3797: class X { }; class C { class X { }; static const int number = 50; static X arr[number]; }; X C::arr[number];// ill-formed: // equivalent to: ::X C::arr[__C::number__]; // not to:

问题 I am at the very beginning with Python, and this is a very general question on the logic and implementation of classes. I apologize for the basic level of the question, but hopefully it will be useful for others too. Here is some context to make it clearer: Context I want to create a class representing an image. This image includes 3 bands (R,G,B, associated with 3 different files) and some metadata (one file, which contains the file path of the 3 bands files and other info like camera, geo

问题 I am at the very beginning with Python, and this is a very general question on the logic and implementation of classes. I apologize for the basic level of the question, but hopefully it will be useful for others too. Here is some context to make it clearer: Context I want to create a class representing an image. This image includes 3 bands (R,G,B, associated with 3 different files) and some metadata (one file, which contains the file path of the 3 bands files and other info like camera, geo

问题 I'm a beginner at Python just getting to grips with classes. I'm sure it's probably something very basic, but why does this code: class Television(): def __init__(self): print('Welcome your TV.') self.volume = 10 self.channel = 1 def channel(self, channel): self.channel = input('Pick a channel: ') print('You are on channel ' + self.channel) def volume_up(self, amount): self.amount = ('Increase the volume by: ') self.volume += self.amount print('The volume is now ' + self.volume) def volume

问题 I'm trying to make a gui which has a SimpleWindow class that contains a textPanel class: class textPanel{ private: std::string text_m; public: textPanel(std::string str):text_m(str){} ~textPanel(); }; class SimpleWindow{ public: SimpleWindow(); ~SimpleWindow(); textPanel text_panel_m; }; SimpleWindow::SimpleWindow(): text_panel_m(std::string temp("default value")) { } I want to be able to initialize the text_panel_m using a const char* that gets converted to a std::string without needing to

问题 I'm trying to make a gui which has a SimpleWindow class that contains a textPanel class: class textPanel{ private: std::string text_m; public: textPanel(std::string str):text_m(str){} ~textPanel(); }; class SimpleWindow{ public: SimpleWindow(); ~SimpleWindow(); textPanel text_panel_m; }; SimpleWindow::SimpleWindow(): text_panel_m(std::string temp("default value")) { } I want to be able to initialize the text_panel_m using a const char* that gets converted to a std::string without needing to

问题 I am looking for a way to dynamically create classes with specific properties accessible via typical instance notation. DynoOne = createClass('DynoOne',props=['A','B']) d = DynoOne (database='XYZ') d.A = d.B + 1 DynoTwo = createClass('DynoTwo',props=['A','C','E']) q = DynoTwo (database='QRS') q.A = q.C + 2*q.E Details of how the "props" are actually acquired and modified would be hidden. This also makes it easier to add access to new props as they become available. I have experimented with

问题 I want to import a class that is in App_Code to use it in my aspx pages. How can I do it ? Thanks 回答1: Add the namespace you used to your codebehind file or aspx file(if not using code behind). using YourNamespace; //C# imports YourNamespace //VB or if not using codebehind <%@ Import Namespace="YourNamespace" %> 回答2: if your app_code class is in another namespace, add a using statement at the top of your code behind. Example: using MyCustomNamespace; EDIT: if using vb in your code behind:

问题 Rookie here, searched for answer and can't discover what i am doing wrong. My menu works fine in active class on "normal" menus, but I cannot find the solution to make the parent menu a "active" one. ![dropdown menu bootstrap][1] The code: <!-- /.abre dropdown --> <li class="dropdown"> <a data-toggle="dropdown" class="dropdown-toggle" href="#">O Que Fazer</a> <ul class="dropdown-menu"> <li><a href="<?php bloginfo('url'); ?>/sem-sair-de-carro/">Sem Sair de Carro <i class="icon-arrow-right"></i