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diff --git a/content/zettel/3c3k1.md b/content/zettel/3c3k1.md new file mode 100644 index 0000000..358910d --- /dev/null +++ b/content/zettel/3c3k1.md @@ -0,0 +1,22 @@ ++++ +title = "Theory Around `sem_pred_expr`" +date = "2022-11-16" +author = "Yann Herklotz" +tags = [] +categories = [] +backlinks = ["3c3k"] +forwardlinks = [] +zettelid = "3c3k1" ++++ + +The function `sem_pred_expr` has the same type signature as a `foldMap` +function, maybe also the same signature as `foldMapM`, where the monad +is the `Reader` monad. The only difference seems to be with how the +elements are combined. Instead of being combined using the monoid, they +are combined using the evaluation of the predicates, because this is +only implemented for predicated objects. + +In addition to that, I feel like there should be a similarity between +sending the identity semantics into the predicated semantics and the +general **Free Applicative**. This is because we are essentially +extracting the structure of the object that is inside of the predicates. |