factory

问题 I'm looking for the best way to write object-oriented JavaScript (JS) code in a way that is similar to Java classes. Factory functions (FFs) look like a very promising way of offering class-like functionality in JS and, so far, I've been building them like this: function FF(constructorArg) { var _privateName = constructorArg; var publicMessage = "Hello StackOverflow"; function publicMethodGetName() { return _privateName; } return { publicMethodGetName: publicMethodGetName, publicMessage:

问题 I'm not sure how to accomplish this in c++, but I want to prevent users of my library from providing singleton objects when I request a certain kind of object from their plugin that leverages my core libraries. I've tried a bunch of variations, but this is my current attempt at an implementation at a templated factory in C++. Questions are embedded as comments in FooProvider.h stub. Thanks! /* * IFooProvider.h */ //Interface - Factory for different variations of IFoo class IFooProvider {

问题 I have a recursive table in my Laravel DB project that handles a dynamic menu. For testing purposes I want to seed that table with random elements. A random element of faker library will be okay for the menu name. The problem is how to generate the parent_id numbers that match with any element of that menu table. I'll show you an example: +---------------------------+ | id | name | parent_id | +---------------------------+ | 1 | animals | 0 | |---------------------------| | 2 | food | 0 | |--

问题 I have this Config file which has interface for data, default configuration of scrollbar, injection token to be able to inject this configuration and provider for modules that contains factory which returns deepClone of default config object: export interface ScrollbarConfig { name: string; class: string; options: MCustomScrollbar.CustomScrollbarOptions; } export const SCROLLBAR_CONFIG = new InjectionToken<ScrollbarConfig>('scrollbar.config');` export const SCROLLBAR_CONFIG_DEFAULT:

问题 Is there some kind of bean factory or static class that I can use within a Spring configuration file to create an instance of a Java class and set its properties? Something like this: <bean id="myThingy" class="org.whatever.specialBeanMaker"> <property class="${maven.filtered.property.value}" /> <properties> <property name="a" value="...." /> <property name="b" value="...." /> <property name="c" value="...." /> </properties> </bean> In other words, I need to make a bean from a class I won't

问题 I have a .net assembly that exposes a public class (named A) to be created other programs using reflection (Assembly.CreateInstance). For now, it works fine. But now I have two subclasses of A, say A1 and A2, and I need to create one or the other, depending on a runtime check. The client cannot be modified, it should believe that the object returned is of class A. If I were using COM instead of .net, it would be easy enough: simply add the check into the IClassFactory.CreateInstance and be

问题 I tried this code for implement the Factory in castle windsor, but it throws and exception as shown in title of this issue. i am following the examples of Documentation here. plz point out where i am getting wrong. using System; using System.Windows.Forms; using Castle.Facilities.TypedFactory; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Castle.MicroKernel.Registration; using Castle.Windsor; namespace AsFactoryImplementation {

问题 I'm reading the Effective Java book by Joshua Bloch. In the first chapter, he says to use factories instead of constructors and lists the advantages and disadvantages of this approach. As far as I see disadvantages are not closely related to to object construction. Moreover, Bloch says that Java Bean style of construction has disadvantages as well. Source: http://www.javapractices.com/topic/TopicAction.do?Id=84 OK, so using constructors is not great, Java beans are not great, factories are

问题 I'm currently trying to implement the Repository Pattern on top of my DbContext. The thing is, I eventually end up with a situation where I have to inject several Repositories into a UnitOfWork constructor, like this: public class UnitOfWork { private DbContext _context; ICustomerRepository Customers { get; private set; } IEmployeeRepository Employees { get; private set; } public UnitOfWork(DbContext context, ICustomerRepository cust, IEmployeeRepository emp) { _context = context; Customers =

问题 i am using faker generate to generate fake entries and insert it into database with the help of php artisan db:seed when i run this command it shows an error : Seeding: TodosTableSeeder Symfony\Component\Debug\Exception\FatalThrowableError : Class 'APP\Todo' not found at /var/www/html/todos/vendor/laravel/framework/src/Illuminate/Database/Eloquent/FactoryBuilder.php:217 213| if ($this->amount < 1) { 214| return (new $this->class)->newCollection(); 215| } 216| 217| $instances = (new $this-