When should we use one versus the other? If I'm designing an S3 class "blah", should I just implement
blah <- function(x, ...) UseMethod("blah")
and then a bunch of blah.whatever() functions, including blah.default()?
Or should I do
as.blah <- function(x, ...) UseMethod("as.blah")
with a bunch of methods for it? Or do both?
Jeff
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