The Functional Programmer's Toolkit

on YouTube ↗01h 06m

" summary

Begins by naming eleven practical tools and then shows concrete implementations in F#: map, return, bind, apply plus reduce and monoid combiners. Demonstrates how monoids enable monoid parallelization and incremental aggregation, how functor map lifts functions into option/list/async worlds, how bind linearises world-crossing functions (options, tasks, results) to avoid nested checks, and how applicatives validate fields in parallel. Builds a working pipeline: download JSON → parse → validate → persist (async+result), all composed and shown to work.

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" chapters (13)

1. 0:00Intro
2. 1:10Functional programming is scary
3. 2:04Object oriented programming is scary
4. 3:43The Functional Toolbox
5. 5:06Functional Toolbox (FP jargon version)
6. 8:28Lego Philosophy
7. 26:10Monoid summary
8. 27:07What is an effect?
9. 28:48"Option" world
10. 40:05A world crossing function
11. 51:58FP terminology
12. 55:06Combining lists (cross product)
13. 59:50Example scenario

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