virtual

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: With Genymotion 2.8.0 , I have installed Google Nexus 6P 7.0.0 device with API level 24. After launching the device, I have flashed the ARM Virtual translator and restarted the device. Then, I have download open_gapps from http://opengapps.org/?download=true&arch=arm64&api=7.0&variant=pico for playstore and other apps installation. By drag and dropping the open_gapps zip file into the device, it is getting copied to the SDcard download folder and not installing the google apps. Please anyone suggest me where went wrong. Thanks in advance.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Tried to create an AVD from the eclipse environment in the following steps: Click Window/Android Virtual Device Manager. This brings up the "Android Virtual Device Manager" dialog. In the dialog, click "New...". This brings up the "Create new Android Virtual Device (AVD)" dialog. Fill out the fields in this dialog, then click the OK button. But the OK button doesn't do anything. The "Create new Android Virtual Device (AVD)" dialog still stays up and nothing is created. 回答1: you need to avoid spaces in the AVD name. Put underscore instead and

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm trying to create a custom exception that derives from std::exception and overrides what() . At first, I wrote it like this: class UserException : public std::exception { private: const std::string message; public: UserException(const std::string &message) : message(message) {} virtual const char* what() const override { return message.c_str(); } }; This works fine in VS2012, but it doesn't compile in GCC 4.8 with -std=c++11 : error: looser throw specifier for ‘virtual const char* UserException::what() const’ So I add noexcept : virtual

I'm in the proccess of learning the language and this is a noob doubt. Is it possible to use a virtual friend function? I don't know if it's possible, I didn't even test it but it could be useful in some situations. For example, for the overloaded operator<<(). DerivedClass dc; BaseClass &rbc = dc; cout << rbc; My guess is it's possible, but I'm not sure since a friend function is not implemented in the class design, and theoretically is not part of it (though in this example, conceptually it makes sense that operator<<() should be a method, but due to syntax limitations it's not possible to

I (vaguely) know that a template is not instantiated if it is not used . For example, the following code will compile fine even though T::type doesn't make sense when T = int . template<typename T> struct A { void f() { using type = typename T::type; } }; A<int> a; //ok It compiles because f() is not used , so it is not instantiated — thus the validity of T::type remains unchecked. It doesn't matter if some other member function g() calls f() . template<typename T> struct A { void f() { using type = typename T::type; } void g() { f(); } //Is f() still unused? }; A<int> a; //ok This also

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am using cordova to build apps for android, on Mac OS X 10.9.4. I am using genymotion to create virtual devices. Yesterday I was able to get 'cordova run android' to get my apps to run on a genymotion virtual device. Today, I thought I repeated the steps I took yesterday, but I can't get it to work. I start the adb server (with genymotion not running) with adb start-server adb server starts up fine: * daemon not running. starting it now on port 5037 * * daemon started successfully * I can see it's there lsof -i tcp:5037 adb 19131 bw 7u

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Is this safe ? class Derived: public PublicBase, private PrivateBase { ... ~Derived() { FunctionCall(); } virtual void FunctionCall() { PrivateBase::FunctionCall(); } } class PublicBase { virtual ~PublicBase(){}; virtual void FunctionCall() = 0; } class PrivateBase { virtual ~PrivateBase(){}; virtual void FunctionCall() { .... } } PublicBase* ptrBase = new Derived(); delete ptrBase; This code crases sometimes with IP in a bad address. That is not a good idea to call a virtual function on constructor is clear for everyone. From articles like

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Say I have classes Foo and Bar set up like this: class Foo { public: int x; virtual void printStuff() { std::cout As annotated in the code, I'd like to be able to call the base class's function that I'm overriding. In Java there's the super.funcname() syntax. Is this possible in C++? 回答1: The C++ syntax is like this: class Bar : public Foo { // ... void printStuff() { Foo::printStuff(); // calls base class' function } }; 回答2: Yes, class Bar : public Foo { ... void printStuff() { Foo::printStuff(); } }; It is the same as super in Java, except

When a method is declared as virtual in a class, its overrides in derived classes are automatically considered virtual as well, and the C++ language makes this keyword virtual optional in this case: class Base { virtual void f(); }; class Derived : public Base { void f(); // 'virtual' is optional but implied. }; My question is: What is the rationale for making virtual optional? I know that it is not absolutely necessary for the compiler to be told that, but I would think that developers would benefit if such a constraint was enforced by the compiler. E.g., sometimes when I read others' code I

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: <VirtualHost *:80> ServerName superhost.gr ServerAdmin nikos@superhost.gr WSGIDaemonProcess public_html user=nikos group=nikos processes=1 threads=5 WSGIScriptAlias / /home/nikos/public_html/webapp.py ProxyPass / http://superhost.gr:5000/ ProxyPassReverse / http://superhost:5000/ <Directory /home/nikos/public_html> WSGIProcessGroup public_html WSGIApplicationGroup %{GLOBAL} WSGIScriptReloading On AddHandler wsgi-script .wsgi .py Options -Indexes +IncludesNOEXEC +SymLinksIfOwnerMatch +ExecCGI AllowOverride None Require all granted </Directory