Monad for dummies
summary
Explains how monads are implemented in PHP with concrete code: M[T] with unit and bind, a Maybe monad that returns Nothing to short‑circuit a missing product, an Either (left/right) monad that carries typed errors through file → CSV parsing, and a Writer/log monad that threads and concatenates logs across a pipeline. Shows array_map/join for list monads, demos a calculation pipeline (start 3 → add2, square, ×3, ÷6) producing 12.5, and argues this makes testing and centralized error handling easier.
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chapters (9)
- 0:00Introduction
- 1:50Functional programming essence
- 3:59Pure functions and immutability
- 6:44What is a monad
- 8:50Maybe monad examples
- 13:31Either monad for errors
- 20:55Lists as monads in PHP
- 24:04Log monad for state
- 27:36Summary
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