Remove NULL elements from list of lists

Question

How do I remove the null elements from a list of lists, like below, in R:

lll <- list(list(NULL),list(1),list(\"a\"))

The object I want

Answer 1

Since you have lists in lists, you probably need to run l/sapply twice, like:

lll[!sapply(lll,sapply,is.null)]

#[[1]]
#[[1]][[1]]
#[1] 1
#
#
#[[2]]
#[[2]][[1]]
#[1] "a"