[Bioc-devel] testing class and length of function args

Michael Love michaelisaiahlove at gmail.com
Thu Jul 23 01:13:18 CEST 2015

it's slightly annoying to write

foo <- function(x) {
  if ( ! is.numeric(x) ) stop("x should be numeric")
  if ( ! length(x) == 2 ) stop("x should be length 2")
  c(x[2], x[1])

i wonder if we could have some core functions that test the class and
the length in one and give the appropriate stop message.

maybe this exists already


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