static

问题 This question already has answers here : How are static variables with the same name in different functions identified by the System? (3 answers) Closed 6 years ago . I have tried running and compiling the code where I have defined the static variables with the same name in two different source files. The code was compiled successfully and running. Now my question is that both the static variables reside in the . data/BSS section in the memory. As per my understanding two different memory

问题 This question already has answers here : How are static variables with the same name in different functions identified by the System? (3 answers) Closed 6 years ago . I have tried running and compiling the code where I have defined the static variables with the same name in two different source files. The code was compiled successfully and running. Now my question is that both the static variables reside in the . data/BSS section in the memory. As per my understanding two different memory

问题 What is the problem with below code? class test { static int a; a=10; } If I'm writing like this (as above), I'm getting a compile time error. class test { static int a=10; a=4; } For the second one, I'm not getting any error. 回答1: Neither of your examples should compile. a=10; is a statement, which is not valid directly inside a class declaration. You can only put the following directly inside a class: Member declarations (member/static variable declarations (like static int a; ), methods,

问题 I'm using Microsoft Visual Studio 2017, and from what I've seen it does support C++17 static inline class variables. My issue is that if I leave all members unitialised it works fine but I get a compiler error when initialising certain members. In the following example: #include <iostream> class Foo { public: static inline int a; static inline int b; static inline int c; }; int main() { Foo foo; std::cout << foo.a; // Prints 0 std::cin.ignore(); return 0; } It works fine. In the following

问题 I want to access a static property using an instance. Something like this function User(){ console.log('Constructor: property1=' + this.constructor.property1) ; } User.prototype = { test: function() { console.log('test: property1=' + this.constructor.property1) ; } } User.property1 = 10 ; // STATIC PROPERTY var inst = new User() ; inst.test() ; Here is the same code in a jsfiddle In my situation I don't know which class the instance belongs to, so I tried to access the static property using

问题 I want to access a static property using an instance. Something like this function User(){ console.log('Constructor: property1=' + this.constructor.property1) ; } User.prototype = { test: function() { console.log('test: property1=' + this.constructor.property1) ; } } User.property1 = 10 ; // STATIC PROPERTY var inst = new User() ; inst.test() ; Here is the same code in a jsfiddle In my situation I don't know which class the instance belongs to, so I tried to access the static property using

问题 I'm developing a flask app with the following folder structure: |-->flask_app.py |-->static |-->css |-->bootstrap.min.css |-->styles.css |-->js |-->jquery-3.1.1.min.js |-->bootstrap.min.js |-->script.js |-->templates |-->index.html What is the proper way to link to these css and js files in index.html and what parameters do I need associated with them? My CSS links look like this and are located in the header: <link rel="stylesheet" href="{{ url_for('static', filename='css/styles.css') }}">

问题 I'm developing a flask app with the following folder structure: |-->flask_app.py |-->static |-->css |-->bootstrap.min.css |-->styles.css |-->js |-->jquery-3.1.1.min.js |-->bootstrap.min.js |-->script.js |-->templates |-->index.html What is the proper way to link to these css and js files in index.html and what parameters do I need associated with them? My CSS links look like this and are located in the header: <link rel="stylesheet" href="{{ url_for('static', filename='css/styles.css') }}">

问题 I'm developing a flask app with the following folder structure: |-->flask_app.py |-->static |-->css |-->bootstrap.min.css |-->styles.css |-->js |-->jquery-3.1.1.min.js |-->bootstrap.min.js |-->script.js |-->templates |-->index.html What is the proper way to link to these css and js files in index.html and what parameters do I need associated with them? My CSS links look like this and are located in the header: <link rel="stylesheet" href="{{ url_for('static', filename='css/styles.css') }}">

问题 I have a static variable in the class. I am Initializing that in the global scope, its works fine. But When I try to Initialize in the main linker throws an error. Why it so. class Myclass{ static int iCount; } ; int main(){ int Myclass::iCount=1; } And In global scope why I have to specify the variable type like int Myclass::iCount=1; As In my class I am definig iCount as integer type why not. Myclass::iCount =1 ; in //Global scope 回答1: The section $9.4.2/7 from the C++ Standard says, Static