Return the first or last part of a list (from https://gist.github.com/pimentel/256fc8c9b5191da63819)

Returns the first or last part of a list. Instead of returning the first n entries as the standard head() does, it attempts to call head() recursively on the entries in the list. If it fails, it will return the particular entry (standard behavior).

Usage

headList(obj, n = 6L)

Arguments

obj

a list object

n

a single integer. If positive, prints the first n items for the list and all entries in the list. If negative, prints all but the last n items in the list.

Value

a list of length n, with items in the list of length n