tests/testthat/_snaps/step-call.md

In tidyverse/dtplyr: Data Table Back-End for 'dplyr'

but not with anything else

Code
  dt %>% rename_with(1)
Condition
  Error in `rename_with()`:
  ! `.fn` must be a function name or formula

rename_with generates minimal spec

Code
  dt %>% rename_with(toupper) %>% show_query()
Output
  setnames(copy(DT), toupper)
Code
  dt %>% rename_with(toupper, 1:3) %>% show_query()
Output
  setnames(copy(DT), c("a", "b", "c"), toupper)

can compute distinct computed variables

Code
  dt %>% distinct(z = x + y) %>% show_query()
Output
  unique(copy(dt)[, `:=`(z = x + y)][, `:=`(c("x", "y"), NULL)])

errors are raised

Code
  collect(drop_na(dt, "z"))
Condition
  Error in `drop_na()`:
  ! Can't select columns that don't exist.
  x Column `z` doesn't exist.

tidyverse/dtplyr documentation built on Jan. 28, 2025, 2:24 a.m.