class

Closures vs. classes for encapsulation?

由 一笑奈何 提交于 2020-01-11 18:00:30
问题 I'm new to JS (from C++/etc), and it's just occurred to me that closures seem to be a simpler and more convenient way to handle encapsulation than classes. This code seems to give a simple way to handle encapsulation: function addProperty(o) { var value; o["get"] = function() { return value; } o["set"] = function(v) { value = v; } } // create two independent objects which are instances of pseudo-class 'addProperty', // which each have their own version of a set of local fields, and methods

Initialize class object like an array

由 冷暖自知 提交于 2020-01-11 14:27:59
问题 I'm creating a custom vector class for a school project and I'd like to be able to initialize it like this: vector x = { 2, 3, 4, 5 }; Is there any way to do this is C++? Here is the header of my class: class vector { private: int vsize; int valloc; double* values; public: vector() : vsize(0), valloc(0), values(nullptr) {} vector(???); vector(const vector& v); int size() const { return vsize; }; int alloc() const { return valloc; }; void resize(int newsize); void insert(double x); void insert

Initialize class object like an array

由 浪子不回头ぞ 提交于 2020-01-11 14:27:25
问题 I'm creating a custom vector class for a school project and I'd like to be able to initialize it like this: vector x = { 2, 3, 4, 5 }; Is there any way to do this is C++? Here is the header of my class: class vector { private: int vsize; int valloc; double* values; public: vector() : vsize(0), valloc(0), values(nullptr) {} vector(???); vector(const vector& v); int size() const { return vsize; }; int alloc() const { return valloc; }; void resize(int newsize); void insert(double x); void insert

jQuery addClass removeClass toggleClass hasClass is(.class)用法

由 岁酱吖の 提交于 2020-01-11 12:55:02
jQuery addClass removeClass toggleClass hasClass is(.class)用法 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE html> <html> <head> <base href="<%=basePath%>"> <meta charset="UTF-8"> <title>b index</title> <link rel='stylesheet' type="text/css" href='b/css/bootstrap.css'> <style type="text/css"> .s1{ width: 100px; height: 100px; background-color: pink; } .s2{ width: 50px; height: 50px; background-color:

Error 438 Object doesn't support this property or method - Class Object with Dictionary

由 时光毁灭记忆、已成空白 提交于 2020-01-11 12:13:10
问题 Background: This is a follow-up question on this recent question I asked on how to return an array of Class module properties directly from an Dictionary item. I have now tried my way to work with Property Let and Property Get to populate a Private Array to populate the Dictionary with. However, running some test I encountered an Error 438 . Code: Imagine TstClass as a class module with the following code: Private lst(0 To 2) As Variant Public Property Let Add(ByVal i As Long, ByVal NewVal As

My code with str_replace don't work

由 前提是你 提交于 2020-01-11 11:56:07
问题 why this code isn't working? I was trying to rename, switch location and other, but it seems to be str_replace bug. It would be nice, if somebody told me, what's wrong... This is my index.php <?php header('Content-Type:text/html;charset=utf-8'); session_start(); require_once ('inc/core.php'); $core = new core($_GET['viev']); this is core.php <?php class core{ var $template; var $view; public function __construct($view) { $this->template = $this->loadTemplate(); $this->view = $view; $this-

servlet response time is slow for first request

由 与世无争的帅哥 提交于 2020-01-11 11:13:26
问题 Servlet response time slow only for 1st request Response time 1st request is 10.5 seconds. further request 2.5 seconds. From few java resources i got to know that the servlet loads the required classes for the first time during the first request and reuses the same for further requests and hence the delay Fix 1: I created a dummy request within the servlet immediately after the execution of init() method. Response time : 2.5 seconds for all requests through user agents. Fix 2: I tried loading

Calling base method from derived class

由 ぐ巨炮叔叔 提交于 2020-01-11 09:51:52
问题 I have, for example, such class: class Base { public: void SomeFunc() { std::cout << "la-la-la\n"; } }; I derive new one from it: class Child : public Base { void SomeFunc() { // Call somehow code from base class std::cout << "Hello from child\n"; } }; And I want to see: la-la-la Hello from child Can I call method from derived class? 回答1: Sure: void SomeFunc() { Base::SomeFunc(); std::cout << "Hello from child\n"; } Btw since Base::SomeFunc() is not declared virtual , Derived::SomeFunc()

Overriding parent class's function [duplicate]

由 旧巷老猫 提交于 2020-01-11 09:50:10
问题 This question already has answers here : vector of objects (5 answers) Closed 5 years ago . class classa { public: virtual void foo(); }; class classb : public classa { public: virtual void foo() override; }; void classa::foo() { std::cout << "foo from a" << std::endl; } void classb::foo() { std::cout << "foo from b" << std::endl; } int main() { std::vector<classa> stuff; classa a; classb b; stuff.push_back(a); stuff.push_back(b); stuff[0].foo(); stuff[1].foo(); return 0; } I expected the

Access object created in one class into another

由 喜夏-厌秋 提交于 2020-01-11 09:14:46
问题 I have a primary class as below: public class classB{ public classC getObject(String getstring){ return new classC(getstring); } } The classC has a contructor: public class classC{ String string; public classC(String s){ this.string = s; } public methodC(int i){ <using the `string` variable here> } } Now I've a classA which will be using the object created in classB (which is of course, an instance of classC ). public classA{ int a = 0.5; <Get the object that was created in classB>.methodC(a)
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