I need a Fold (Map k v) (k, v) optic. Is there a way to obtain it with the "optics" library? If not, is there one with "lens"?
Optic from map to its association pairs
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In either
opticsorlens, you should be able to write:Generally speaking
foldingtakes any function that produces a foldable result (in this case, a list of key-value pairs) and creates a fold over those elements.