Lapply with Custom Return Type
map(x, f, output_type = "list")A list (if output_type = "list") or a vector, sharing names with x,
built by applying f to each element of x. This is a rough implementation
of the map function from the purrr package and aims at removing the
dependency from that package.
A vector or list
A function
The desired return type. Should be one of "list" (the default), "integer", "numeric" or "character".