On 12/4/20 3:05 PM, Duncan Murdoch wrote:
...
It's tempting to suggest it should allow something like
mtcars |> subset(cyl == 4) |> lm(mpg ~ disp, data = .)
which would be expanded to something equivalent to the other versions:
but that makes it quite a bit more complicated. (Maybe _ or \. should
be used instead of ., since those are not legal variable names.)
I support the idea of using an underscore (_) as the placeholder symbol.
Syntactic sugars work the the best if 1) they require less keystrokes
and/or 2) are easier to read compared to the "normal" syntax, and 3) can
not lead to unexpected bugs (which is a major problem with the magrittr
pipe). Using '_' fulfills all of these criteria since '_' can not clash
with any variable in the environment.
Denes
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