typelevel/cats

Add `attemptOption` to Alternative

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#2,936 opened on Jul 9, 2019

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 (6 comments) (0 reactions) (0 assignees)Scala (1,241 forks)batch import
help wantedlow-hanging fruit

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Description

def attemptOption[A](fa: F[A]): F[Option[A]] =
  fa.map(_.some) <+> Option.empty[A].pure[F]

Contributor guide

Research direction
Study the Alternative trait in cats, implement the method as provided, add tests, and submit a pull request.
Tech stack
scala
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
ScalaGitFunctional programming
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75