Set configuration options on a per-package basis.
    Options set by a given package only apply to that package,
    other packages are unaffected.

Functions for Base Types and Core R and 'Tidyverse' Features

A toolbox for working with base types, core R features
  like the condition system, and core 'Tidyverse' features like tidy
  evaluation.

c(
    person("Lionel", "Henry", ,"lionel@rstudio.com", c("aut", "cre")),
    person("Hadley", "Wickham", ,"hadley@rstudio.com", "aut"),
    person("RStudio", role = "cph")
    )

cli, covr, crayon, glue, magrittr, methods, pillar,
rmarkdown, testthat (>= 2.3.0), vctrs (>= 0.2.3)

Lionel Henry [aut, cre],
  Hadley Wickham [aut],
  RStudio [cph]

c(person("Hong", "Ooi", role="cre", email="hongooi@microsoft.com"),
             person("Microsoft", role=c("aut", "cph")),
             person("Steve", "Weston", role="aut"))

Support for the foreach looping construct.  Foreach is an
        idiom that allows for iterating over elements in a collection,
        without the use of an explicit loop counter.  This package in
        particular is intended to be used for its return value, rather
        than for its side effects.  In that sense, it is similar to the
        standard lapply function, but doesn't require the evaluation
        of a function.  Using foreach without side effects also
        facilitates executing the loop in parallel.

randomForest, doMC, doParallel, testthat, knitr, rmarkdown

'callCombine.R' 'foreach.R' 'do.R' 'foreach-ext.R'
'foreach-pkg.R' 'getDoPar.R' 'getDoSeq.R' 'getsyms.R' 'iter.R'
'nextElem.R' 'onLoad.R' 'setDoPar.R' 'setDoSeq.R' 'times.R'
'utils.R'

Hong Ooi [cre],
  Microsoft [aut, cph],
  Steve Weston [aut]

Helpers for Developing Command Line Interfaces

c(
    person("Gábor", "Csárdi", , "csardi.gabor@gmail.com", c("aut", "cre")),
    person("Hadley", "Wickham", role = c("ctb")),
    person("Kirill", "Müller", role = c("ctb"))
    )

A suite of tools to build attractive command line interfaces
    ('CLIs'), from semantic elements: headings, lists, alerts, paragraphs,
    etc. Supports custom themes via a 'CSS'-like language. It also contains a
    number of lower level 'CLI' elements: rules, boxes, trees, and
    'Unicode' symbols with 'ASCII' alternatives. It integrates with the
    'crayon' package to support 'ANSI' terminal colors.