In statnmap/arpr: Advanced R Pipes

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arpr

The goal of arpr is to provide convenience functions for programming with magrittr pipes. Conditional pipes, a string prefixer and a function to pipe the given object into a specific argument given by character name are currently supported. It is named after the dadaist Hans Arp, a friend of Rene Magritte.

Note that the {arpr} package was originally created by Jirka Lewandowski. The present repository is a fork to be able to continue development of this package, required for {gitlabr}.

Installation

You can install the released version of arpr from CRAN with:

install.packages("arpr")

And the development version from GitHub with:

# install.packages("devtools")
devtools::install_github("statnmap/arpr")

Examples

library(arpr)

• Prefix a string of text

"xyz" %>%
   prefix("abc")

• iff() applies a function if and only if test is TRUE
• otherwise return input value unchanged
• iffn() is if and only if test is FALSE

x <- 1
x %>%
  iff(is.na, const(0))
x <- NA
x %>%
  iff(is.na, const(0))

x <- 1
x %>%
  iff(x <= 0, function(x) { x - 2 })
x <- -1
x %>%
  iff(x <= 0, function(x) { x - 2 })

x <- NA
x %>%
  iffn(is.na, exp)
x <- 10
x %>%
  iffn(is.na, exp)

• Pipe into specific formal argument

5L %>%
  pipe_into("digits", format, 2.731234567)

statnmap/arpr documentation built on Dec. 23, 2021, 5:28 a.m.