The blog post introduces a concept of composition, which is an important concept in functional programming including Haskell.

The blog post introduces a concept of currying, which is an important concept in functional programming including Haskell.

The blog post introduces higher-order functions and anonymous functions, which are all important concepts in Haskell.

The blog post introduces lists and tuples, which are all important concepts in Haskell.

The blog post introduces recursions, guards, and patterns, which are all important concepts in Haskell.