Thank you. Basically I was looking for the functional-programming equivalent to the OOP factory-equipment analogy, or asking if such an analogy does/can exist (

Thank you. Basically I was looking for the functional-programming equivalent to the OOP factory-equipment analogy, or asking if such an analogy does/can exist (if it can't, the why might also be a valuable explanation). That analogy can be used to explain the main ideas behind encapsulation, interfaces, and internal state, and why they are valuable, before having any understanding of how those are implemented in practice, and even without any programming knowledge at all. So far everything I've found on functional programming starts with implementation details and provides no initial framework for understanding the broad-strokes of organisation and value proposition.