All Questions
Tagged with functional-programming object-oriented
95 questions
0
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0
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32
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API design for precomputation cache [closed]
In my numeric code library I have a function totient_sum that depends on an expensive one-time precomputation totsum_range = [...], then different calls to totient_sum(n) are quick. There are several ...
- 342
1
vote
3
answers
3k
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Why is white box testing discouraged in OOP?
It seems the general consensus for unit testing classes is to test your object through its public interface only. So if you wanted to test the removeElement method on a LinkedList class you'd need to ...
- 11
4
votes
5
answers
368
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Anemic Models vs. Rich Models: When to Use?
I'm working on an application and have encountered two different approaches for organizing business logic. There's a general consensus that application rules should be handled in higher layers, so I ...
- 81.9k
2
votes
1
answer
289
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Did the term "decorator" originate with OOP design patterns?
The Decorator pattern allows behaviour to be dynamically added to an existing object, effectively "decorating" it with new behaviour. While the pattern as formalised and named seems to have ...
- 21
2
votes
1
answer
130
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OO vs FP: What is a good approach to understanding if heavy wrapper classes should be used?
Consider a processing system which ingests objects from an external source and performs extensive processing. One example could be objects detected by a computer vision system which are then fed into ...
- 118k
1
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3
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2k
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Are "Distributed Enums" an Anti-pattern in non-OOP like they seem to be considered in OOP?
I have recently read about the so-called "distributed enum anti-pattern." In particular, as it relates to using enums in conditional statements. (The idea is apparently that if you were to ...
- 218k
-2
votes
1
answer
170
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Which paradigm(between OOP and Functional) should be chosen for a given task?
Which paradigm(between OOP and Functional) should be chosen for a given task ? What are the tradeoffs between these two styles ? In which case using Functional makes sense and vice versa,in which case ...
- 218k
50
votes
9
answers
14k
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Return considered harmful? Can code be functional without it?
OK, so the title is a little clickbaity but seriously I've been on a tell, don't ask (TDA) kick for a while. I like how it encourages methods to be used as messages in true object-oriented fashion. ...
- 218k
11
votes
4
answers
3k
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Why not apply Interface Segregation Principle to "extreme"
Providing that clients would typically consume just one method, though methods would be conceptually related, why not always apply the Interface Segregation Principle to the extreme and have [many] ...
- 3,167
3
votes
1
answer
239
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Making mutable classes immutable
When trying to turn a class with mutable state into an immutable one I am regularly having a hard time choosing between two alternatives: I can 1)
either extract the state into another (immutable) ...
- 398
1
vote
2
answers
196
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Should I add functionality by adding a new method to a class - or should I "register" the new functionality into a data structure?
I have one large class that computes ~50 different metrics (each metric has no side effects).
My code is similar to this:
class ReportingMetrics:
def __init__(self, data:pd.DataFrame, config:dict)...
- 405
4
votes
2
answers
308
views
Should I use classes instead of functions with a state needed for computation?
I have implemented the cows and bulls game in C++.
The code:
#include <cstdio>
#include <cstdlib>
#include <ctime>
struct DigitMatches {
int matches_in_right_positions;
int ...
- 3,063
9
votes
7
answers
4k
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what can go wrong in context of functional programming if my object is mutable?
I can see the benefits of mutable vs immutable objects like immutable objects take away lot of hard to troubleshoot issues in multi threaded programming due to shared and writeable state. On the ...
38
votes
7
answers
9k
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Do you need to think about encapsulation if you can ensure immutability?
Encapsulation
In object-oriented programming (OOP), encapsulation refers to the
bundling of data with the methods that operate on that data, or the
restricting of direct access to some of an ...
- 7,159
2
votes
3
answers
472
views
Swappable state object or decoupling data and functions
I come from OOP pradigm and I also know a bit about functional programming and its advantages. Over time I came to like the separation of data and transformations that are applied to it using pure ...
- 11