These functions are equivalent to in_case(), switch_case(),
grep_case(), fn_case(), and fn_switch_case() but return
lists.
in_case_list(..., preserve = FALSE, default = NA)switch_case_list(x, ..., preserve = FALSE, default = NA)
grep_case_list(x, ..., preserve = FALSE, default = NA)
fn_case_list(x, fn, ..., preserve = FALSE, default = NA)
fn_switch_case_list(x, fn, ..., preserve = FALSE, default = NA)
A list of length 1 or n, matching the length of the logical input vector.
<dynamic-dots> A sequence of two-sided
formulas or named arguments.
Formulas: Elements of x that return TRUE when passed to fn with
the left hand side (LHS) of each formula will be replaced with the value in
the right hand side (RHS).
The LHS must evaluate to a logical vector when passed to fn with x.
The RHS must be of length 1 or the same length as all other RHS.
Named arguments: named arguments are passed as additional arguments
to the function fn.
If TRUE, unmatched elements of x will be returned
unmodified.
(The elements may have their type coerced to be compatible with
replacement values.)
If FALSE, unmatched elements of x will be replaced with default.
Defaults to FALSE.
If preserve is FALSE, a value to replace unmatched
elements of x.
Defaults to NA.
A vector
A function to apply to the left-hand side of each formula in ...
Either a quoted or unquoted function name, an anonymous function, or
a purrr-style formula.
The function should take two inputs, the first being x and the second
being the left-hand side of the formula.
The function should return a logical vector, either of length 1 or the same
length as x.
This can be useful when returning a non-atomic value and/or when you want to create a list column inside a tibble.
in_case(), switch_case(), grep_case(), fn_case(), and
fn_case_fct() on which these functions are based.
1:3 %>%
in_case_list(
. < 2 ~ mtcars,
default = letters
)
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