Install elpa-dash-functional by entering the following commands in the terminal:
sudo apt update sudo apt install elpa-dash-functional
collection of functional combinators for Emacs Lisp
This library contains combinators to enable the use of certain functional programming techniques in Emacs Lisp. . For example, the `-flip' function takes a binary function, and returns a binary function that is the same as the original function, except that the order of its arguments is reversed. . See the elpa-dash package for list processing functions.