박준규: Either 씁시다. 너무 편합니다.

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

박준규 @curry@hackers.pub

9/16/2025, 6:23:20 AM

Public

Either 씁시다. 너무 편합니다.

If you have a fediverse account, you can reply to this note from your own instance. Search https://hackers.pub/ap/notes/01995131-2892-7dc4-aefa-9beaf544141f on your instance and reply to it.

박준규 @curry@hackers.pub

9/16/2025, 6:44:08 AM

Public

하스켈 쪽에는 《Finding Success (and Failure) in Haskell》이라는 책이 있습니다. 이 책에서는 크게 다음과 같은 타입을 소개합니다.

Maybe의 한계를 극복한 Either.
Either의 한계를 극복한 Validate.

Finding Success (and Failure) in Haskell

A practical approach to learning Haskell, motivated by combining functions that can fail, introducing typeclasses (Functor, Applicative, and Monad) as needed.

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