If you know map, I will teach you monads
summary
Starts from the concrete claim that map is a capability and demonstrates it across four implementations: array.map, a recursive map_tree function, an async stream implemented with setTimeout and a bacon.Bus, and ES6 promises. Shows a real Google Translate fetch returning Promises via the Google Translate API then flattens them into a stream with bacon.fromPromise, proving map vs flatMap behavior with working examples and printing translated capitalized words (mission success).
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chapters (8)
- 0:00Introduction
- 1:05Functors and monads
- 2:30Map concept
- 12:15Mapping arrays and trees
- 15:50Streams as functors
- 22:12flatMap and monads
- 27:23Streams and promises as monads
- 32:07Summary
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