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Legacy in Functional Programming With Eric Normand

Legacy Code Rocks

CHAPTER

Reasoning and Control in Functional and Object-Oriented Programming

This chapter explores the differences in reasoning and control between functional programming (FP) and object-oriented (OO) programming, highlighting how FP encourages concurrency and message passing while OO focuses on long-living objects. It discusses language design issues, distinguishing between pure functions and code with varying effects, and the concept of side effects and managing them using the IO type. Additionally, it delves into the concept of actions and their spread throughout a function, mentioning the book 'Grocking Simplicity' and concluding with a discussion on legacy code.

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