How to not fall into R's 'lazy evaluation trap'

Question

\"R passes promises, not values. The promise is forced when it is first evaluated, not when it is passed.\", see this answer by G. Grothendieck. Also see this question referring

Answer 1

R has a function that helps safeguard against lazy evaluation, in situations like closure creation: forceAndCall().

From the online R help documentation:

forceAndCall is intended to help defining higher order functions like apply to behave more reasonably when the result returned by the function applied is a closure that captured its arguments.