R Observatory: Metrics for maybe version 1.1.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

maybe

1.1.0Package record

The Maybe Monad

4packages dependsuggested by 2

3.8Kdownloads / year

100.0%test coverage

13/13flavors OK

Overview

About

Maintained by Andrew McNeilCRAN page ↗GitHub ↗Website ↗Issues ↗

The maybe type represents the possibility of some value or nothing. It is often used instead of throwing an error or returning `NULL`. The advantage of using a maybe type over `NULL` is that it is both composable and requires the developer to explicitly acknowledge the potential absence of a value, helping to avoid the existence of unexpected behaviour.

Changes in 1.1.0

Features

maybe_map3 Evaluate a ternary function on three maybe values
and_then2 Evaluate a binary maybe returning function on two maybe values
and_then3 Evaluate a ternary maybe returning function on three maybe values

Bug fixes

Fixed invisible return of maybe value to print correctly

From NEWS.md in the release

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("maybe", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("armcn/maybe")

Development version from armcn/maybe. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-maybe

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-maybe

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-maybe

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 7.0 min · r-oldrel-macos-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.1.0

READMEYes · 718 wordsVignettesNoNEWSYes · 100% structured · mentions 1.1.0Citation fileNoWebsiteYes · pkgdown

Help pages: 30 (1 internal)
Examples that run: 100%29 run in a plain check
Exported functions with examples: 97%
Documented parameters: 98%
Return-value docs: 100%
Help pages citing references: 0%

How these are measured

Downloads

3.8K

CRAN downloads in the past year

Rank #12,927 · ~10/day · ~316/mo

Releases R versions

Daily download trend is not available in this view yet.

31130 days

89190 days

3.8K1 year

Compare downloads with other packages →

Also on74 r2u10 autocran707 conda_forge

How downloads are counted

Repository

armcn/maybe ↗Account: armcn

49Stars

1Forks

0Open issues

0Open PRs

5Releases

47Commits

1Commit identities

functional-programmingrstatsr

47 commits · Last activity 2023-08-06

Responsiveness

How these are sampled

PRs merged (all time): 100%
Median days to close, 50 most recently updated closed issues: 12
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2025-09-19 · 492026-07-07 · 49

How these are measured

PracticesBeta

9 development-tooling and community-health practices detected across 5 families in the upstream repository

Checks run against github.com/armcn/maybe on 2026-10-25.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux

Docs source (4)

README.Rmdpkgdown

GitHub Pages site last deployed 2023-08-07 · The repository has a site deploy workflow

Coverage (1)

Coverage reporting (Codecov)

CRAN release process (1)

cran-comments.md

Show all practicesHide 1 practice

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v4 (2026-10-20)

Dependencies

Declared dependencies

4 external dependencies (excludes base and recommended)

Installing maybe adds 1 package (1 with compiled code, 275 KB of source tarballs). Heaviest: magrittr 275 KB.

Depends (0)

none

Imports (1)

magrittr

LinkingTo (0)

none

Suggests (3)

testthat quickcheck covr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

4direct

0indirect

Imports 4

Suggested by 2

Depends, Imports or LinkingTo, most downloaded first

chronicler braids cyclotomic intmap

Suggests, most downloaded first

rixpress monad

How these are counted

Code & Tests

People & History

People (1)

Andrew McNeil

Author, Maintainer since 0.1.0 (2022)

Releases (5)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
1.1.0Latest
record
2023-08-07 · current release · diff ↗ ·
added 3 exports
and_then2, and_then3, maybe_map3
R
R 4.3.0 released · 2023-04-21
1.0.0
record
2022-05-28 · diff ↗ ·
added 5 exports
filter_justs, filter_map, from_just, maybe_case, maybe_map2
R
R 4.2.0 released · 2022-04-22
0.2.1
record
2022-03-11 · diff ↗ ·
added 1 export
%>%
0.2.0
record
2022-02-11 · diff ↗ ·
removed 2 exports
flatten_maybe, map_maybe

added 4 exports
maybe_contains, maybe_equal, maybe_flatten, maybe_map
0.1.0
record
2022-01-27
R
R 4.1.0 released · 2021-05-18

Package metadata

First published: 2022-01-27
Total releases: 5 / 4 yrs
License: MIT + file LICENSE OSI
Download size: 459 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("maybe")

Format

McNeil, A. (2023). maybe: The Maybe Monad (Version 1.1.0) [Computer software]. https://doi.org/10.32614/CRAN.package.maybe

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for maybe version 1.1.0 [Data set]. HJJB, LLC. Data release v2026-10-26. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-26, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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