In alekrutkowski/AlphaPipes: Named magrittr-style pipes

The package provides "named pipes" which may complement: the magrittr package pipes. The named pipes make it possible to use all lower-case and upper-case letters as the right-hand-side symbols/placeholders for the values piped from the left-hand-side, while the standard magrittr operator %>% uses only a dot.

When the package is loaded (via library(AlphaPipes)) the pipe operators (%a% ... %z% and %A% ... %Z%) are dynamically created in AlphaPipes namespace. So you cannot import them via `%myoperator%` <- AlphaPipes::`%a%`. Anyway, such an import does not seem to make sense -- namespaced operators e.g. AlphaPipes::`%a%` would be inconvenient -- too verbose, while re-named "named pipes" e.g. %aa% as an alias for %a% would be confusing (since symbol a would need to be used on the right-hand side anyway).

Installation

devtools::install_github('alekrutkowski/AlphaPipes')

AlphaPipes needs package clojR which can also be installed from GitHub:

devtools::install_github('alekrutkowski/clojR')

Examples

library(AlphaPipes)

# Trivial -- the same as
#  mean(1:3)
# or
#  1:3 %>% mean
1:3 %A% mean(A)
# Showing the actual usefulness -- referring to earlier values
# from the piped flow:
data.frame(xx = 1:5) %a%
    (dplyr::mutate(a, nnn = xx + 10) %b%
         dplyr::rename(b, xx2 = xx) %b%
         cbind(b, a))
# All the available "named pipes":
cat(ls(name = "package:AlphaPipes"), sep="  ")