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What does "dependency injection" mean in programming?
dependency injection is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.
Definition
A design pattern where an object receives its dependencies from outside rather than creating them internally. Makes code more testable and loosely coupled by separating object construction from object use. Often abbreviated DI.
Example
"The service receives the database client via dependency injection — in tests, pass a mock client instead."
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