fp-ts Tutorial | Chapter 3: Either

YouTube Excerpt: In Chapter 3 of this fp-ts tutorial (functional programming in TypeScript), we will introduce the Either type, which is used to represent the result of a computation that can fail. Traditionally, you don't have any indication in the type system that a function might throw, and when you catch errors in a try/catch block, you just get an error with type 'unknown', which is not helpful at all! With the Either type, however, you can have fully type-safe errors! In the sense that not only you know that a function might fail but you also get fully-typed errors! Furthermore, we will see how to enforce the handling of all errors in the type system by doing pattern matching on errors using the ts-adt library. 00:00 Errors with try/catch 00:14 Type-safe errors 00:31 Either definition 01:44 Either visualization 02:19 Example 04:24 Either vs throwing error 05:05 Either pattern matching 06:00 Error pattern matching

In Chapter 3 of this fp-ts tutorial (functional programming in TypeScript), we will introduce the Either type, which is used to represent the...

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