Is it possible to memoize a recursion scheme? If so, how would you? For example, the following uses anamophism and catamorphism to solve the latti ...
Is it possible to memoize a recursion scheme? If so, how would you? For example, the following uses anamophism and catamorphism to solve the latti ...
I recently discovered how to simulate higher kinded types in Java in a somewhat roundabout way like so Here H encodes a higher kinded type that tak ...
Lets say I have four components and I want to conditionally render them depending on a type prop using daggy: In this example type prop value can be ...
I have a typical binary search tree data type: and a catamorphism I tried to define an insert function using foldt and got some interesting resu ...
A catamorphism can either deconstruct a value or maintain the structure and act like the identity of the underlying type: With lists (or arrays ...
Which one is the appropriate morphism (recursion scheme) to use when the given item's position (index, or path) is required in the transformer functio ...
I am trying to implement an expression tree in Haskell as follows: data ExprTr a b = Variable a | Constant b ...
I'm trying to make sure I understand the initial algebra and catamorphism concept using the basic case of natural numbers, but I'm definitely missing ...
Using the following catamorphism for natural numbers I can implement various arithmetic algorithms whithout having to deal with recursion: cataNat ...
I am trying to translate the following piece of code from SML to haskell but I'm having a bit of trouble. Here is what I've tried: I get the er ...
I recently read about recursion schemes where catamorphisms are described as analogous to generalized foldr. Is is possible to write an instance of ...
Is there a name for a recursion scheme that's like a catamorphism, but that allows peeking at the final result while it's still running? Here's a slig ...
The foldr identity is More generally, with folds you can either destroy structure and end up with a summary value or inject structure in such a way ...
I am currently learning folds in the sense of structural recursion/catamorphisms. I implemented power and factorial using a fold for natural numbers. ...
I feel like understanding the abstract concept of fixed point of a functor, however, I am still struggling to figure out the exact implementation of i ...
I have an AST that I'm annotating using Cofree: I use type Expr = Fix ExprF to represent untagged ASTs, and type AnnExpr a = Cofree ExprF a to repr ...
So I've been trying to convert this Haskell function thats checks if a list doesn't have any repetitions into an Hylomorphism, but there's something o ...
I have this lovely fixana function here that performs about 5 times faster than her sister ana. (i have a criterion report to back me on this) Can ...
I have this F-Algebra (introduced in a previous question), and I want to cast an effectful algebra upon it. Through desperate trial, I managed to put ...
The following function implements the good old filter function from lists by using the recursion-schemes library. It compiles and a short test like ...