The funprog package implements in R some functions existing in other pure functional programming languages.
The package provides high-order functions, for example :
Helper functions can be used in conjunction with the main functions :
%on% combines two functions into one and serves to create a
predicate function to group_if
descending is used to reverse the output of a sorting
function used with sort_by
If the purrr package is installed, you
can use its special syntax to create very compact anonymous functions, for
example ~ abs(.x - .y) > 1 instead of function(x, y) abs(x - y)
> 1.