Extract non null elements from a list in R

Question

I have a list like this:

    x = list(a = 1:4, b = 3:10, c = NULL)
    x
    #$a
    #[1] 1 2 3 4
    #
    #$b
    #[1]  3  4  5  6  7  8  9 10
    #
    #$         


        

Answer 1

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

This generalizes to any logical statement about the list, just sub in the logic for "is.null".