different between anamorphism vs catamorphism

English

ana- +? morphism

anamorphism (plural anamorphisms)

(computer science) a generalization of the list-producing unfolds known from functional programming to arbitrary abstract data types that can be described as final coalgebras

From cata- +? morphism.

catamorphism (plural catamorphisms)

(computer science) A generalization of the folds on lists known from functional programming to arbitrary abstract data types that can be described as initial algebras.

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