Questions tagged [design-patterns]
For questions requesting extra attention to be paid to the usage of design patterns in the code.
1,428 questions
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Deque implementation around strategy design pattern (after second thought)
After the recommendations from the responses of Deque implementation around strategy design pattern (second thought) the java.util.Deque implemented through plain ...
-5
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0
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126
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Deque implementation around strategy design pattern (second thought)
On a second thought, the Deque implementation around strategy design pattern changed with a new implementation of retainAll method according to the solution from ...
user293551
-4
votes
1
answer
89
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Deque implementation around strategy design pattern
Implementation of java.util.Deque interface based on string of POJOs, that is plain old java object, encapsulating a field for holding reference to each object ...
user293515
-3
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0
answers
62
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Deque implementation around visitor design pattern
Implementation of java.util.Deque interface consisting of linked state objects (called Dual) and two sets of visitors (one for ...
user293421
11
votes
4
answers
2k
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Builder pattern in Rust
I tried to implement Builder pattern, a popular design pattern for constructing objects consisting of different components, in Rust.
Here is my attempt:
...
- 575
6
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3
answers
1k
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Game Design Patterns Command implementation
I started reading the GameProgrammingPatterns book and wanted to implement the command pattern.
...
- 521
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1
answer
243
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ReportManager design — ownership via move or unique_ptr, SRP concerns, and O(1) lookup strategy
I’m practicing the Single-Responsibility principle with a small project.
A Report is composed of ...
- 379
-1
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1
answer
111
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Am I overusing classes and/or OOP features? [closed]
I have a very class heavy approach to writing C++ code, which I don't think is necessarily wrong. However, I often use classes without knowing if I actually need them, which I feel leads to making ...
4
votes
1
answer
121
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Maze game from book Design Patterns with smart pointers and polymorphism
The Design Patterns book chapter 3 about Creational Patterns starts with a maze game. They use the maze as an example throughout the chapter and instead of rooms they have also things like enchanted ...
- 165
9
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2
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432
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Simple LRU cache implementations in C++20
LRU cache is a classical design pattern frequently questioned in programming technical interviews. It is best illustrated with pictures. Here are two examples.
The following are two alternative ...
- 190
4
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3
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373
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numpy array/item handling functions
Recently I have been using numpy arrays, which have great utility via their broadcasting methods.
I am attempting to write a useful public facing library, and this ...
- 355
4
votes
2
answers
536
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Simple Java program to aggregate lines of a text file
I have just written a small application to aggregate the lines of a text file, for example to group the lines according to the frequency of IP addresses in a log file.
Would the code be sufficiently ...
- 938
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1
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75
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Bulk conditions evaluation throwing a single RuntimeException exception
Bulk conditions evaluation throwing a single exception of a configurable type for all unfulfilled conditions.
It is developed around several design patterns:
(1) fluent interface to configure the ...
user289021
1
vote
1
answer
128
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Database design using Closure Table for tagging system
I created these database tables with the inspiration in NjDevPro github repository. The design uses Closure Table for implementation of hierarchical tagging system in ...
- 37
4
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2
answers
141
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Managing file paths in a python Data Science project
When doing Data Science projects, I often have to load data and metadata, and output results, plots, logs, etc.
Therefore I have to handle all the file paths from where to load the input and write the ...
