Do any items in a list or vector return TRUE from a predicate function?

Do any items in a list or vector return TRUE from a predicate function?

• is_any_null(): Is any item in a list or vector a NULL value?

• is_any_na(): Is any item in a list or vector a NA value?

• is_none(): Is no item in a list or vector return TRUE from a predicate function?

• is_none_null(): Is no item in a list or vector is NULL?

Do any items in a list or vector return TRUE from a predicate function?

• is_any_null(): Is any item in a list or vector a NULL value?

• is_any_na(): Is any item in a list or vector a NA value?

Usage

is_any(x, FUN, ...)

is_any_null(x)

is_any_na(x)

is_none(x, FUN, ...)

is_none_null(x)

is_any(x, FUN, ...)

is_any_null(x)

is_any_na(x)

Arguments

x

A list or vector passed to vapply().

FUN

the function to be applied to each element of X: see ‘Details’. In the case of functions like +, %*%, the function name must be backquoted or quoted.

...

Arguments passed on to base::vapply, base::vapply

USE.NAMES

logical; if TRUE and if X is character, use X as names for the result unless it had names already. Since this argument follows ... its name cannot be abbreviated.

FUN.VALUE

a (generalized) vector; a template for the return value from FUN. See ‘Details’.

Value

TRUE if FUN returns TRUE for any element of x or FALSE if all elements return FALSE.

TRUE if FUN returns TRUE for any element of x or FALSE if all elements return FALSE.

See also

is_all()

is_all()