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Questions tagged [cohesion]

High cohesion is when you have a class that does a well defined job. Low cohesion is when a class does a lot of jobs that don't have much in common.

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Decreasing coupling and cohesion by facade pattern

For my Software Design class, I have to find out if it is possible to decrease coupling and decrease cohesion at the same time by using the Facade pattern? As you all probably know, when there is low coupling, the cohesion of the classes is high and…
Mislav Niko Zaloker
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Turning sequential cohesion into functional cohesion?

As described on this website, A module with (only) procedural cohesion is one supporting different and possibly unrelated activities, in which control passes from one activity to the next. Page-Jones gives an example of a module (whose name might…
x1886x
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Class design: change text on button click

I have 2 classes for the game I am making: a gui class and the logic class, for a game of noughts and crosses. The GUI class has a method that uses an array of JButtons and returns them all with the same anonymous inner class action listener. When I…
Roberto Duran
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Is there a PHP linter that can restrict class imports based on custom boundary rules?

We have a monorepo that includes our old monolith as well as our new modules. (We don't want separate repos...yet) src/Monolith/... src/OrderModule/... src/PaymentModule/... We obviously don't want our new modules coupled to the monolith. We also…
Matt Janssen
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What is difference between procedural cohesion and sequential cohesion in Software Design Architecture?

Procedural cohesion says Parts of a module are grouped because they always follow a certain sequence of execution and Sequential cohesion says Parts of a module are grouped because the output from one part is the input to another part like an…
Usama
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Remove coupling and then mock for unit test

This is a dilemma. Say we have two classes Class A { public int memberValue; } interface IB { int fun(); } Class B : IB { public int fun() { var a = new A(); switch(a.memberValue) { case 1: …
dushyantp
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Tools for measuring coupling and cohesion

Do you know of any tools that help us measure coupling and cohesion in the system?
noobcoder
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Cohesion VS. Coupling

This question will treat software like a tree, where: Each node in the tree represents some code unit (eg class \ method \ line etc.) Node X is son of Node Y if in the source code X is set in Y Here is the definition of the term T: T relative to…
idan mor
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Keeping Coupling Low While Adhering to DRY

The mantra "Keep high cohesion and low coupling" (or some variant) is frequently tossed around. However, I find that it frequently conflicts with "Don't repeat yourself." For example, I think we can all agree that it's a bad thing to re-implement…
Maxpm
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Improving Cohesion and Coupling of Classes

I am given this set of code and need to suggest ways to improve the code's cohesion and coupling of the classes. But I thought these classes are quite well de-coupled since it looks like they are making use of events. And in terms of cohesion, all…
Carven
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When does improving program cohesion worsen coupling?

I recently took an exam on design principles & patterns, and one of the questions in the exam was as follows : "Sometimes improving program cohesion may worsen coupling, give an example." From what I understand, cohesion is how focused a…
Some Student
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Is this considered low coupling & high cohesion? Any chance to improve?

I'm trying to get hold of the SOLID principles by Robert C. Martin. Currently I'm looking into low coupling & high cohesion. I've created some code which represents my current understanding of this subject. Could you guys tell me if on the right…
M. Groenhout
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Communication cohesion

There are coupling and cohesion for modules. OK. There are functional and communication cohesion. Functional cohesion is grouping by functionality. OK. Communication cohesion is grouping by input/output data.. Hm.. Not OK. Can any explain me what is…
Stan Kurilin
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Which is "better" practice? Passing object references or object method references in Python

I'm writing a small piece of code in Python and am curious what other people think of this. I have a few classes, each with a few methods, and am trying to determine what is "better": to pass objects through method calls, or to pass methods through…
Corey D
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SRP: Why use instance field values instead of parameters?

I've just read SRP, as easy as 123…, and all of it resonates with me except one paragraph, in a section named "Cohesion" (I've claimed before to "get" Cohesion, but this talk of parameters vs instance fields gives me pause...): Take your class.…
lance
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