Function Composition

ELI5 — The Vibe Check

Function composition in cloud terms means chaining serverless functions together to build complex workflows. Function A's output feeds into Function B, which feeds into Function C. Instead of one massive function, you get a pipeline of small, focused functions. It's like an assembly line — each worker does one thing well.

Real Talk

Function composition is the practice of combining multiple serverless functions into a coordinated workflow. This can be achieved through orchestration (using Step Functions, Durable Functions) or choreography (using events/queues). It enables complex business logic while keeping individual functions small, testable, and independently deployable.

When You'll Hear This

"We compose our order pipeline from 5 Lambda functions orchestrated by Step Functions." / "Function composition keeps each function under 200 lines and single-purpose."