Select first element of nested list
list, r
Solution
Not much of a shortcut, but you can do this:
lapply(x, `[[`, 1)
# [[1]]
# [1] 1
#
# [[2]]
# [1] 3
#
# [[3]]
# [1] 5
Problem
Let's say I have a list like this: ``` x = list(list(1,2), list(3,4), list(5,6)) ``` I would like a list that contains only the first elements of the nested list. I can do this by returning another list like so ``` x1 = lapply(x, function(l) l[[1]]) ``` Is there shortcut notation for this?