lapply(NULL, ...) returns empty list

Hadley Wickham · 2008-09-04T21:48:24Z

On Thu, Sep 4, 2008 at 4:01 PM, Vadim Organovich wrote: > Dear R-devel, > > Is there a reason that lapply(NULL, ...) returns the empty list, rather than NULL? It seems intuitive to expect the latter, and rather counterintuitive that lapply(list(), ... ) returns the same value as lapply(NULL, ...). X: a vector (atomic or list) or an expressions vector. Other objects (including classed objects) will be coerced by 'as.list'. > as.list(NULL)

Hadley Wickham

Thu, Sep 4, 2008 2:48 PM

On Thu, Sep 4, 2008 at 4:01 PM, Vadim Organovich

<vogranovich at jumptrading.com> wrote:

X: a vector (atomic or list) or an expressions vector.  Other
          objects (including classed objects) will be coerced by
          'as.list'.

list()

Hadley

http://had.co.nz/

Thread (2 messages)

Vadim Ogranovich lapply(NULL, ...) returns empty list Sep 4 Hadley Wickham lapply(NULL, ...) returns empty list Sep 4