agreeing

Idiomatic data structure for agreement

https://github.com/jcranch/agreement#readme

LTS Haskell 22.41:0.2.2.0
Stackage Nightly 2024-11-12:0.2.2.0
Latest on Hackage:0.2.2.0

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BSD-3-Clause licensed by James Cranch
Maintained by [email protected]
This version can be pinned in stack with:agreeing-0.2.2.0@sha256:8fe403e736aea00a4e54bc158b960506be5a6308a20e65130754e428d220aeea,1649

Module documentation for 0.2.2.0

Depends on 1 package(full list with versions):
base

agreeing

A simple data structure helping us ask questions of the following sort: “does all this data have the same /BLANK/ and if so what is it?”

For example:

    doTheseHaveTheSameLength :: [String] -> String
    doTheseHaveTheSameLength l = case foldMap (Somebody . length) of
      Somebody n -> "They all have length " <> show n
      Nobody     -> "The lengths differ"
      Anybody    -> "You didn't give me any strings"

This can of course be done with Maybe (Maybe x) instead, but doing so runs the risk of getting confused: which is Nothing and which is Just Nothing?

Changes

Changelog for agreeing

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to the Haskell Package Versioning Policy.

0.2.1.0 - 2023-10-30

  • ADDED: Eq, Ord, Show, Applicative and Monad instances

0.1.0.0 - 2023-03-15

Initial version