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Symmetry in the interrelation of flatMap/foldMap/traverse and flatten/fold/sequence : r/scala
The Functional Programming Triad of Folding, Scanning and Iteration - a first example in Scala and Haskell - Polyglot FP for Fun and Profit - Speaker Deck
Folding Unfolded - Polyglot - FP for Fun and Profit - Haskell and Scala - Part 2 - Speaker Deck
Why Data Structures Matter | Sliding up the banister