Convert list to list of lists using R

How can I convert the list of strings a to list of lists b as

a = list('A', 'B', 'C')

and the converted to

b = list(list('A'), list('B'), list('C'))

using R? Thanks.

>Solution :

Apply the function list to the list a:

lapply(a, list)

[[1]]
[[1]][[1]]
[1] "A"


[[2]]
[[2]][[1]]
[1] "B"


[[3]]
[[3]][[1]]
[1] "C"