create tibble with numeric(0) doesn't give same result as NULL column

[xtimbeau]

When creating a tibble with a NULL column no column is created. If the column is a numeric(0) vector, thant the tibble has no line (but the column is created). I may have missed the logic or a previous issue.

library(tibble)
# gives a one line tibble with one column
tibble(a=1, b=NULL)
# gives an empty tibble (surprinsingly and I'd prefer solution 1)
tibble(a=1, b=numeric(0))

[krlmlr]

Thanks, this is expected, and documented (somewhat hidden) in https://vctrs.r-lib.org/reference/theory-faq-recycling.html . Do we need a link from ?tibble to the reference I gave?

I do appreciate that the behavior is different from that of data.frame() . Perhaps this even warrants an explicit mention in ?tibble ?

[moodymudskipper]

tibble() behaves differently from data.frame() when provided zero length input.
This is documented but we'd like to make the information easier to access in ?tibble by summarising the behavior and linking to existing documentation.