The shortest FP book ever – Volume IIpic.twitter.com/kcXkIY07I7
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Same as monad, except the square is around the blue dot, not the red. Operation is called cobind, or extend.
I see, that's so much clearer that way. I definitely need to add that. Thanks !
Also, thanks to your @lambda_conf workshop Volume XXVII might be about (profunctor) optics
(need that time to come up w/ a good diagram tho)
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