makeActiveBinding(): The Most Magical Hidden Gem in Base R | /en/2018/08/make-active-binding/

Guest *Miles McBain* @ 2018-08-20 02:03:31 originally posted:

Wow. I learned a lot from picking through this code! Thanks Yihui.

Guest *Ogan* @ 2018-09-11 22:44:05 originally posted:

A weird thing I see is that autocomplete of Rstudio seems to execute the function for the active binding.

Guest *Prabhu* @ 2018-10-07 13:40:35 originally posted:

Yihui,

Can you please clarify the behavior of makeActiveBinding under attach? See below:

e = new.env()
makeActiveBinding("rnd", function(x) runif(10), e)

e$rnd # works
with(e, rnd) # ok

attach(e)
rnd # nope -- shows function

detach(e)
e$rnd # back to normal

Thanks in advance.