Thun/docs/reference/cons.md

(Basis Function) Given an item and a list, append the item to the list to make a new list. A [...] cons

## cons (Basis Function) Given an item and a list, append the item to the list to make a new list. A [...] cons

     [A ...]

Source

func(cons, [list(A), B|S], [list([B|A])|S]).

Discussion

Cons is a venerable old function from Lisp. It doesn't inspect the item but it will not cons onto a non-list. It's inverse operation is called uncons.

Crosslinks

ccons uncons