maybe-justify: Simple higher order function for Maybe

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Data
- Maybe
  - Data.Maybe.Justify

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maybe-justify-0.1.0.0.tar.gz [browse] (Cabal source package)
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taksuyu

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Versions [RSS]	0.1.0.0
Dependencies	base (>=4 && <5) [details]
License	LicenseRef-PublicDomain
Author	taksuyu
Maintainer	tak@ispabuse.org
Category	Data
Source repo	head: git clone https://github.com/TakSuyu/maybe-justify.git
Uploaded	by taksuyu at 2015-06-24T20:45:30Z
Distributions	NixOS:0.1.0.0
Reverse Dependencies	1 direct, 0 indirect [details]
Downloads	1055 total (10 in the last 30 days)
Rating	(no votes yet) [estimated by Bayesian average]
Your Rating	λ λ λ
Status	Docs available [build log] Last success reported on 2015-06-24 [all 1 reports]

Readme for maybe-justify-0.1.0.0

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Maybe you just need justify?

We've all used Maybe in a control flow

if f x then Just x else Nothing

but why not have

justify id f x

multiple constraints?

justify id (\a -> f a && g a) x

want a silly id for Maybe?

justify fromJust isJust (Just x)

This seems like such a no brainer that I'm surprised it isn't in Data.Maybe so I'm proposing that it should be and this library is just the start.

What about licensing issues?

Since I know there will be some talk about licensing, I already took the step and used the unlicense. If that isn't enough, just send a pull request changing it to an appropriate license and I'll accept.

What do I do while this isn't in Data.Maybe?

Then just go ahead and pull in maybe-justify from cabal!