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DESIGN-PATTERNS QUESTIONS

How can we convert a function without a parameter into a one-parameter function?
How can we convert a function without a parameter into a one-parameter function?
should help you out There are no functions without parameters, and there's no conversion going on with multi-parameter functions. As the quote says, "every function is a one parameter function". There's always just one parameter, no more and no less.
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : user183954
What are the differences between concurrency computational models and concurrency patterns?
What are the differences between concurrency computational models and concurrency patterns?
like below fixes the issue So, concurrency computational models are way of modeling and thinking concurrent systems mathematically . For example, the actor model in a very theory heavy research paper wouldn't really say anything about how an actor ca
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : Amin Amini
Choosing the correct Flutter design pattern
Choosing the correct Flutter design pattern
hope this fix your issue You need to use stateManagement.It exist BLoC but you can also use Provider with no problem and it will solve your problem.
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : user186831
Why is factory method not necessary when "instantiation takes place in an operation that subclasses can easily over
Why is factory method not necessary when "instantiation takes place in an operation that subclasses can easily over
may help you . Let me start by giving a java implementation of the factory method pattern:
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : user121405
Can more than one objects aggregate or acquaint or instantiate the same object?
Can more than one objects aggregate or acquaint or instantiate the same object?
this one helps. To my understanding and the common definitions I know, Composition is an association where the lifetime of the associated objects is tied to the lifetime of the owner. Aggregation describes an association where the lifetime of the agg
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : Bart van Bragt
Good case for a Null Object Pattern? (Provide some service with a mailservice)
Good case for a Null Object Pattern? (Provide some service with a mailservice)
help you fix your problem I am a fan of this pattern. I'm also a fan of renaming objects to match semantics.As you know, the two benefits you get from the use of a NullObject are:
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : nobodyzzz
How to refactor method which performs multiple steps (dependent on each other)?
How to refactor method which performs multiple steps (dependent on each other)?
Hope that helps Well, there is no general answer to that. But about your example of creating and setting up objects, look into the Builder Pattern and the Factory Patten. The command pattern is useful when you have different possible actions (e.g. me
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : adrianmooreuk
Progress Bar design patterns?
Progress Bar design patterns?
will be helpful for those in need A very interesting approach is the user perception.Chris Harrison published a paper on how user perceives the time passing depending on the progress reported by the progress bar (although the actual duration was obvi
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : user122937
"Presenter First" vs "Passive View" MVP?
"Presenter First" vs "Passive View" MVP?
Hope this helps Maybe i'm wrong, but from what i understand :The mvp pattern used in presenter first approach is a slight variation around the passive view described by martin fowler. In some case, when the business object (or model) is too hard to m
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : user167963
Following Domain Driven Design with MVVM/WPF
Following Domain Driven Design with MVVM/WPF
this will help This isn't the answer you are directly looking for, but in order to keep separation of concerns, I would not use your domain pocos to make up the viewmodel. I would map the domain objects to completely separate viewmodel objects. This
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : user98832
Design question what pattern to use
Design question what pattern to use
I wish did fix the issue. I would usually have a single User table with a column "Approved". Most queries will only retrieve rows where this flag is true. E.g. you could create a view "ApprovedUsers" as
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : jedameron
Is MFC is based on any design pattern,if so which design pattern?
Is MFC is based on any design pattern,if so which design pattern?
Hope that helps MFC and Design PatternsAs we all know, MFC is one of the popular class libraries used by C++ programmers. The success story behind MFC is its class architecture and design principles adopted by the developers of MFC, which makes it on
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : lamberms
design pattern compose or inherit?
design pattern compose or inherit?
To fix the issue you can do This article should give you a complete answer: Design Principles from Design Patterns: Composition versus inheritanceI quote a straight answer from Erich Gamma here:
TAG : design-patterns
Date : January 02 2021, 06:48 AM , By : drbillll
Implementing Factory Patterns - Removing the switch
Implementing Factory Patterns - Removing the switch
it should still fix some issue The factory is typically where you place the switch statement to handle the different types. In a parser, you might have levels of responses and types to deal with, so they get stacked: if a “purchase” response comes ba
TAG : design-patterns
Date : January 01 2021, 05:04 PM , By : robinator
How to model in UML an angular service with serveral Observable attribute
How to model in UML an angular service with serveral Observable attribute
I hope this helps you . Your class diagram is roughly correct. If you also want to document the dynamic behavior, then you could add a sequence diagram.I would change the class diagram as follows:
TAG : design-patterns
Date : December 31 2020, 08:18 AM , By : Rohii
KeyNotFoundException vs returning null in Kotlin
KeyNotFoundException vs returning null in Kotlin
hope this fix your issue In Kotlin, you have decent null handling. So opposed to java, no need to avoid null, you can embrace it.So i would choose your second option and let the consumer of your Api decide themself.
TAG : design-patterns
Date : December 26 2020, 12:01 AM , By : Marcos de Carvalho
Design pattern to process different messages based on message type
Design pattern to process different messages based on message type
I hope this helps you . You can create a map with message type as key and processing logic as value
TAG : design-patterns
Date : November 27 2020, 05:23 PM , By : Mikael
How do I use Decorator and Flyweight design patterns together?
How do I use Decorator and Flyweight design patterns together?
To fix the issue you can do Design patterns are not "standards". Design patterns are common Appropriate [vs. Anti-patterns] solutions for common problems. And usually you don't build entire system by using certain design pattern. Rather your subsyste
TAG : design-patterns
Date : November 22 2020, 10:31 AM , By : Dré
Template design pattern for operations with parameters
Template design pattern for operations with parameters
Any of those help In a previous project, we used the Template pattern with a context object as follows:
TAG : design-patterns
Date : November 19 2020, 01:01 AM , By : user181445
Clean solution for optional yet required variables
Clean solution for optional yet required variables
With these it helps You could separate the optional from the required variables and use polymorphism to avoid null-checks in getName() and getPlace(). Maybe something like the following:
TAG : design-patterns
Date : November 02 2020, 09:01 AM , By : negonicrac
Abstract Factory violate Single Responsibility Principle?
Abstract Factory violate Single Responsibility Principle?
fixed the issue. Will look into that further The Abstract Factory has a single responsibility, providing a contract for the creation of polymorphic objects without binding the interface to a specific implementation. In other words the contract is its
TAG : design-patterns
Date : October 24 2020, 03:08 PM , By : user137798
How do I implement a periodic digest of messages?
How do I implement a periodic digest of messages?
Does that help Store messages generically in a database with a categorization schema like (this is pseudocode):
TAG : design-patterns
Date : October 18 2020, 11:12 PM , By : Ivan Belov
Iterating over a list of types
Iterating over a list of types
hope this fix your issue Your approach sounds reasonable to me (a combination of iterators/strategies).
TAG : design-patterns
Date : October 16 2020, 11:12 AM , By : Bjørn Lyngwa
What are the downsides to using Dependency Injection?
What are the downsides to using Dependency Injection?
Hope that helps A couple of points: DI increases complexity, usually by increasing the number of classes since responsibilities are separated more, which is not always beneficial Your code will be (somewhat) coupled to the dependency injection framew
TAG : design-patterns
Date : October 14 2020, 01:07 PM , By : msg
Kotlin pattern construction with different parameters
Kotlin pattern construction with different parameters
fixed the issue. Will look into that further You probably might want to use a strategy pattern in combination with good old polymorfismFirst, you can add an abstract class to your concrete classes
TAG : design-patterns
Date : October 06 2020, 01:00 AM , By : hlpimfalling
Istio Service Mesh rollout into Prod (Design / Architectural decisions)
Istio Service Mesh rollout into Prod (Design / Architectural decisions)
I hope this helps . Istio announced that version 1.0 is production-ready. Here are some links about the design/architectural decisions to deploy istio in production: Benchmarking istio in production Istio best practices Istio deployment models Perfor
TAG : design-patterns
Date : September 16 2020, 05:00 AM , By : Chaz
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