Design-patterns Questions

In qt / pyside2, is there such a thing as a qt widget that simply passes through to a wrapped widget, without adding any extra layers of layout

I am going to be giving developers at my company a crash course on design patterns (after coming across some scary code recently). one of

Update: so pretty much everyone here has told me that i just need to start all over again on how i designed my classes (thank you folks for your

I write a singleton c++ in the follow way: class a { private: static a* m_pa; a(); virtual ~a();

Can anyone out there recommend a good online resource for css 'design patterns'? i know design patterns in a software context usually

I just wanted to see if i could have your thoughts on the design of some work i am currently doing. here's the current situation -

What are the advantages and disadvantages of the session façade core j2ee pattern? what are the assumptions behind it? are

For example, i have seen functions like this, which are handy to use: myfunction(data). success(function() { // success! }).

I'm working on a winform .net application with the basic ui that includes toolbar buttons, menu items and keystrokes that all initiate the same

I've done some wpf programing and one thing i never got was the command pattern. every example seems to be for built in ones, edit, cut, paste.

Smack's xmppconnection implements an event-driven manner of receiving xmpp responses from a jabber server. the method

I want to add an index to a filename if the file already exists, so that i don't overwrite it. like if i have a file

Say you have a web form with some fields that you want to validate to be only some subset of alphanumeric, a minimum or maximum length etc.

I have a class called resources and i have defined one method called get_connect. i want to use the data of which get_connect returns to the other

I inherited this gigantic legacy java web app using struts 1.2.4. i have a specific question regarding actions. most of the pages have exactly one

I have few questions in order to understand the mvvm architecture for ios as below - how is model different from the view-model?

I am doing some research about mvp design pattern in android and got a question about splash screen. the app that i am developing with mvp design

I have two numbers: n and sp. i want to create a pattern of list elements with sp elements that rotate like

I'm creating an app that interacts with a firestore database. as of now i have a singleton class, databasemanager that has all the

I have a requirement where the product needs to implement undo-redo functionality. currently i hold a huge object which comes from a

I've been working for 2 months with different camera2 api projects. as you may know, camera2 api is little difficult to understand and maintain,

I have a form that i have put on couple pages, i have a 'next' button wich is displaying the next page, and, when on last page turns to a submit

Please help me to draw a shape like the image below. i have tried many things, but none of the code worked.

I wondered if i could get some advice, i'm trying to create a list by reading a file with input shown below example from input file

I want python to return the same object when the instances are created with the similar attributes. also when i am changing some attribute of one

Input validation is a business logic so we should hide this process in the domain layer. as discussed

The book head first design patterns presents the following uml as an example of the observer pattern:

In my android app i have a multi step login procedure: enter a id, and send to backend: firstcall(id) if id

I'm creating a view entend framelayout now that has about 10 parameters. i was thinking about using the builder pattern, similar to how

We've got two tables that are in a relation to each other. user and booking. the pivot model

I have a basic abc here: from abc import abcmeta, abstractmethod class streamingservice(object, metaclass=abcmeta):

Good day. a store was created based on

I am new to mvvm pattern, and this is a general question for me but i will use a specific example. i have: a data class

I have a baseclass object with two childclass objects inheriting from it. each of these is a significant bit of code

I'm writing a django application in which we will have multiple client libraries that make calls to third party apis. we want to be able to

I'm building a laravel app, which has a number of various features. i want to be able to enable or disable them depending on a particular domain's

I'm writing the code for a game whose server-side is totally based on firebase. i expect to use auth, database, instanceid, messaging and cloud

I want to separate routes from controller. i tried this approach: routes/index.js var express

I have two processes: 1) scraper - take info from another website, do the needfull calculations and put results in db 2) web app

I just wanted to ask if my approach is wrong or one is the right way and it can be done. in the project, i have one hal and several types

I have a node application using koa. it receiving webhooks from external application on specific resources. to illustrate let say the

I have a situation where i want to do multiple things while handling an exception. since i want to make this about the general case, i'll

I am working on designing a system for students, teachers, etc. to use, and i'm using laravel framework to develop. teachers can

I am trying to do the following: #a wrapper object that based on it's parameters returns other

When should i authorize in controller constructor using authorizeresource

I have built my own formbuilder component (which is almost 5k line now), so it can cover all my needs, one issue i'm

I have a deal class, that has several states : new, bought, finished, trend and crossing properties. deal instance can change trend and crossing

I am relatively new to flutter and i was wondering how to make this design possible. i assume i have to use dividers etc but i haven't been able

The problem i'm facing is that upon following the question at this link,

I am trying to use bottom navigation view in my app but i'm having issues getting it to work as it seems to behave differently according to the

I'm developing server side app on node.js and i thinking about config file usage. but when i google it.. well as for now i have more

I started build an e-commerce app that allows people buy one item by turn. however, i don't have deep knowledge about flutter app architecture to

I was reading several guides and one book about the strategy pattern. i noticed that in all the guides there is a referall to a

This is not strictly a programming question but more of a design question. working with some strucs from the winapi i noticed that many of

With nominatim requests i need to keep a timeout of 1500ms between every requests. how do i handle that if multiple concurrent running processes

This is a little long winded. i would like advice on how to go about making the functionality of a remove button. i'm relatively new to

I'm trying to create a component that can activate/disable some functionality depending on the props. all of those functions will need a state

I'd like to have common try/catch/finally logic in a decorator-like feature that can "wrap" a function or class method. consider the

I've got two projects: one of them is a multi-processor project and the second is a single processor. both of them are written in node js.

I have multiple widgets corresponding to each type of object, to modify attributes of these objects. these widgets are based on different state of

Could someone help me with restrictions for input text? <input type = text size = 18 name = part_numb value = '' pattern =

I was wondering to which formal pattern the provider in flutter corresponds. i've seen in the wiki that the one from microsoft is a rename of

I'm learning about repository pattern and i have seen a lot of examples where repository pattern is used for creation and update. here is one

I have a little hard time with all of those design patterns and things that could help me write maintainable code, clean and reusable.what are the

Although there are some tutorials on medium and some other sites about the repository pattern for laravel i read in some sites that repository

I am rewriting my already working python code in a oop manner as i want to implement it in a modular way. i have a dataset that has been obtained

I want to consume a rest api in laravel (an mvc framework) but i resort to use __call and was wonder if there is a better design

For validating form validation rules i currently stored them in user model and use it in register controller, user controller in admin panel, user

I would like to use the repository pattern but i am stuck on the syntax. i want to get my function index(). first step, i

We're working on a laravel application with a scheduling module. the module has three types of classes that can be put in an agenda: task, event

I'm writing a website in react which displays information on mobile apps and i'm using redux to store the information about the current app. i

I'm creating a rest api using laravel in which there is multiple parameter for an endpoint based on user's role. currently checking this

I'm using material-ui components to build my website. i have a header component

In my laravel rest api project i mainly consume 3rd party apis. for that, i have a 'services' folder grouped by apis

I am writing a python program with many (approx ~30-40) parameters, all of which have default values, and all should be adjustable at run time by

I'm using the following approach for creating a singleton-like service in my application: myservice.js:

Will the following way of using a thread pool cause a deadlock? or is such a pattern not preferred? if so, what is the alternative. passing

I'm building an app that needs to use multiple types of similar sensors. since the sensors could also have different behaviours, or combinations

Redux guidelines suggest to think at an app's

First what i mean by patterns.. basically in js there are multiple ways to do something but some ways of doing things offer greater benefits in

I would like to make an generic module in python which uses data from a django model, and use typing to document the interface. the module should

I've been adopting reactjs + redux in my projects for a couple of years. i often end up in asynchronous situations where i need my component to

Let's assume i have user model that related to models image, card, etc. that means when i create a new user, i should create image and card

I am new in swift moved from java. and some implementaion of dessign patterns confuse me. for example i have presudo pattern observer

I have a function foo that takes a parameter stuff stuff can be something in a database and i'd like to create a

I have a list of localizedattributes public class localizedattribute<t> { t value; locale locale; }

I'm working on some project where i need to add react child components dynamically. while this task may seem to be easy to complete, i'm concerned

I have a python file, which has lots of double parentheses like this, which i would like to replace with single parenthesis. sometimes the print

In most of the frameworks you have model classes that represents row in the database. for example php code: class user

I am using lots of if statements in my code now, so i want to change by using class (es6) however, i am not much good at javascript... so

Suppose that there are six kinds of problems to be handled when reading a book, i illustrate the details as follow: while

I want that remove my if what can i do? i retrieve my data from database and in all of type they have some field named isverified is

What is the l.php im guessing l.php is link.php on facebook. its a pre-redirecting script. every link on facebook is

I have an object which is modeled as such: public class template { private form form; public form getform() { return form;

I did a investigation on the laravel repository pattern in order to isolate somehow custom queries and i've also tried it on my internal

I have a system that processes task objects, and now i would like to perform some benchmarking experiments. specifically, i will

I am confused on how should i explain the bridge design pattern in java. based on gof's definition: the bridge pattern is