10 good reasons to invest your time in FP
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This document outlines 10 reasons to invest time in functional programming (FP): 1. To learn FP concepts like parallel collections, higher order functions, and immutability. 2. FP utilizes parallel collections that allow operations like mapping, reducing, and filtering collections concurrently. 3. FP focuses programmers on the essence of algorithms through immutable values and avoidance of side effects.
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10 good reasons to invest your time in FP
- 1. #10 good reasons to invest your time in FP Humberto Streb @humbertostreb Joel Corrêa @joelcorrea_
- 3. #1 Learn
- 6. Multicore powered Parallel collections F#
- 7. Collection operations: Map - Reduce
- 8. Higher order functions Map –> Applies a given fn to each element Reduce –> Combine / Accumulate / fold / compress results though combining operation
- 9. Sample
- 10. Map Map age 20 18 25 41 29 32 38 30
- 11. Reduce 20 18 25 44 29 32 … 236 Combining fn: a+b (operation = +)
- 12. + Data Map age Map age Map age Map age
- 13. map in parallel
- 16. #3 Focus
- 17. Boilerplate code
- 20. REPL
- 22. Same result value given the same arguments
- 23. Troubleshooting in FP Referential transparency Consistency No global state Arguments only Once wrong, always wrong
- 25. Side effects…
- 26. Pure function
- 27. Immutable It is highly recommended that value objects be immutable. They are created with a constructor, and never modified during their life time. Eric Evans
- 28. Immutable
- 29. Immutable
- 30. #6 Built-ins
- 32. Optionals Null checks Explicit
- 33. Interoperability
- 34. #8 Simplicity #7 Simplicity
- 37. #8 Simplicity
- 38. #8 Composition
- 39. # Building blocks Inheritance Polymorphism HOFs Composition OOP = Objects FP = Functions Real world / Complex scenarios
- 40. # HOFs Receives fn
- 41. # Partially applied Returns fn
- 42. # Composition
- 43. #9 Testability
- 44. Hard to test if($player->getScore() > 0) {! !$player->setSwizzle(7);! } else {! !$player->setSwizzle(! ! !$player->getSwizzle() + 1;! !);! }!
- 47. #10 Principles
- 48. FP in non-FP languages Referen'al transparency Side effects Immutabilit y Guidelines
- 49. FP in non-FP languages functools LuaFun
- 52. Learning curve
- 54. Samples https://github.com/jjcorrea/ TenGoodReasonsToInvestYourTimeInFP Resources http://twitter.github.io/scala_school/ http://twitter.github.io/effectivescala http://coursera.org/course/progfun