Get Acquainted with Functor Data Types in JavaScript by creating an Identity Functor

Use a Maybe functor to halt transformer functions from acting on null or undefined values

Creating Semigroup Data Types from Scratch

Testing Semigroups to Ensure They Abide by the Law of Associativity

Leveraging Semigroups to Create Reusable Max & Min Interfaces

Leveraging Semigroups to Create Reusable Any & All Interfaces

Upgrading Semigroup Data Types to Monoids

Transforming All, Any, Max, & Min from Semigroups to Monoids

Learn How to Define a Generalized Monoidal Fold Function

Exploring Common Algebraic Data Types Used in Functional Programming

In this lesson, we'll begin working with monoids by creating some of our own. Specifically, we will upgrade a previously defined semigroup (`Product`) so that it takes the form of a valid monoid. To ensure that we have a valid monoid, we will wrap up this video by testing `Product` so that it holds the laws of `Right` identity and Left` identity.

[Fantasy Land Docs - Monoid](https://github.com/fantasyland/fantasy-land#monoid)





javascript

https://app.egghead.io/api/v1/lessons/javascript-upgrading-semigroup-data-types-to-monoids/transcript

Exploring Common Algebraic Data Types Used in Functional Programming

Upgrading Semigroup Data Types to Monoids

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