On this page: SWI-Prolog -- library(yall): Lambda expressions
I read this:
Combined with library(apply_macros) ,
library(yall)allows writing one-liners for many list operations that have the same performance as hand-written code.
But there seems to be only a library(apply) with the list functions in it.
The possibly errant text is just above the “Parameters” documentation after it states that this is a port of the Logtalk code.