Adverb for conditionally skipping steps in a piped workflow.
only_if(condition)Logical condition to be evaluated
d <- tibble::as_tibble(mtcars)
d %>%
only_if(TRUE)(dplyr::filter)(.data$mpg > 25)
#> # A tibble: 6 × 11
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1 32.4 4 78.7 66 4.08 2.2 19.5 1 1 4 1
#> 2 30.4 4 75.7 52 4.93 1.62 18.5 1 1 4 2
#> 3 33.9 4 71.1 65 4.22 1.84 19.9 1 1 4 1
#> 4 27.3 4 79 66 4.08 1.94 18.9 1 1 4 1
#> 5 26 4 120. 91 4.43 2.14 16.7 0 1 5 2
#> 6 30.4 4 95.1 113 3.77 1.51 16.9 1 1 5 2
d %>%
only_if(FALSE)(dplyr::filter)(.data$mpg > 25)
#> # A tibble: 32 × 11
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1 21 6 160 110 3.9 2.62 16.5 0 1 4 4
#> 2 21 6 160 110 3.9 2.88 17.0 0 1 4 4
#> 3 22.8 4 108 93 3.85 2.32 18.6 1 1 4 1
#> 4 21.4 6 258 110 3.08 3.22 19.4 1 0 3 1
#> 5 18.7 8 360 175 3.15 3.44 17.0 0 0 3 2
#> 6 18.1 6 225 105 2.76 3.46 20.2 1 0 3 1
#> 7 14.3 8 360 245 3.21 3.57 15.8 0 0 3 4
#> 8 24.4 4 147. 62 3.69 3.19 20 1 0 4 2
#> 9 22.8 4 141. 95 3.92 3.15 22.9 1 0 4 2
#> 10 19.2 6 168. 123 3.92 3.44 18.3 1 0 4 4
#> # … with 22 more rows