A function f :: A => B is an expression - often called arrow or lambda expression - with exactly one (immutable) parameter of type A and exactly one return value of type B.That value depends entirely ...

Type safety means some information about your values are known by the system, that is, what functions and operations can work on them. This information might be available in compile time, like in ...

fp-ts is a library for typed functional programming in TypeScript. fp-ts aims to allow developers to use popular patterns and abstractions that are available in most functional languages. For this, it ...