if_
conditionsif_none
, if_any
and if_all
test the elements of the list.
if_all(1:10, ~ .x < 11, ~ return(letters[1:10]))
#> [1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j"
if_any(1:10, is.numeric, ~ print("Yay!"))
#> [1] "Yay!"
if_none(1:10, is.character, ~ rnorm(10))
#> [1] -0.2456426 1.0357812 1.0605769 -0.5472001 -0.4305442 -1.1539970
#> [7] -0.1624151 -0.6929540 0.2308284 1.2328795
The defaut for all .p
is isTRUE
. So you can:
if_then
performs a simple “if this then do that”:
if_not
runs .f
if .p(.x)
is not TRUE :
And if_else
is a wrapper around base::ifelse()
that works with mappers.
If you want these function to return a value, you need to wrap these values into a mapper / a function. E.g, to return a vector, you’ll need to write if_then(1, is.numeric, ~ "Yay")
.