Brian Beckman: Don't fear the Monad (1)

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Open zzz6519003 opened 7 years ago

zzz6519003 commented 7 years ago

Three phrases of learning like French
Category theory
A monoid is a set of things plus a rule for combining the things, and that rules obeys some rules
1. associativity x (y z) = (x y) z 
2. a special member x 12 = x x 12 = x