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Programming Concepts Beginner

What is DRY (Don't Repeat Yourself)?

A software development principle that aims to reduce code duplication by abstracting common patterns into reusable components.

DRY states that every piece of knowledge should have a single, unambiguous representation in a system. Duplicate code means duplicate bugs and duplicate maintenance effort. Extract common logic into functions, classes, or modules.

However, premature abstraction can be worse than duplication. The "Rule of Three" suggests abstracting only after seeing the same pattern three times. WET (Write Everything Twice) and AHA (Avoid Hasty Abstractions) are counterbalancing principles that warn against over-abstraction.

Related Terms

Functional Programming
A programming paradigm that treats computation as the evaluation of mathematical functions, avoiding state changes and mutable data.
Recursion
A programming technique where a function calls itself to solve a problem by breaking it into smaller subproblems.
Thread
The smallest unit of execution within a process, allowing concurrent operations to run within a single program.
API Design
The practice of designing application programming interfaces that are consistent, intuitive, and maintainable for developers to consume.
Data Structure
A way of organizing and storing data in a computer so it can be accessed and modified efficiently.
Hash Table
A data structure that maps keys to values using a hash function, providing average O(1) time complexity for lookups, insertions, and deletions.
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