Nothing
test_dtmsg <- function() {
d <- data.frame(
'g' = c(1, 2, 2, 3, 3, 3),
'x' = c(1, 4, 5, 7, 8, 9),
'v' = c(10, 40, 50, 70, 80, 90)
)
table_description <- local_td(d)
d['irrelevant_column'] <- 1
id_ops_a = table_description %.>%
project(., groupby='g') %.>%
extend(.,
ngroup %:=% row_number())
d %.>% id_ops_a
invisible(NULL)
}
test_dtmsg()
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