Thinking Functionally in PHP

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Functional programming in PHP 7.4, with a side of category theory and monads accessible to everyone.

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Preface2 chapters

Begin part
  1. Preface

  2. Introduction

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Part One10 chapters

Begin part
  1. Pure Functions

  2. First Class Functions

  3. Memoization

  4. Currying

  5. Mapping

  6. Filter

  7. Reducing

  8. Concatenation

  9. Recursion

  10. Immutable Value Objects

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Part Two4 chapters

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  1. Category Theory

  2. Categories in Code

  3. Fun With Functors

  4. Algebraic Data Types

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Part Three4 chapters

Begin part
  1. Handling Null

  2. Either/Or and Error Handling

  3. Tracking Data

  4. Combining Monadic Behavior

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Part Four3 chapters

Begin part
  1. Features of Functional Languages

  2. When to Go Functional

  3. Further Resources