are_even {hutilscpp}

Are elements of a vector even?

Description

Are elements of a vector even?

Usage

are_even(
  x,
  check_integerish = TRUE,
  keep_nas = TRUE,
  nThread = getOption("hutilscpp.nThread", 1L)
)

which_are_even(x, check_integerish = TRUE)

Arguments

x

An integer vector. Double vectors may also be used, but will be truncated, with a warning if any element are not integers. Long vectors are not supported unless x is integer and keep_nas = FALSE.

check_integerish

(logical, default: TRUE) Should the values in x be checked for non-integer values if x is a double vector. If TRUE and values are found to be non-integer a warning is emitted.

keep_nas

(logical, default: TRUE) Should NAs in x return NA in the result? If FALSE, will return TRUE since the internal representation of x is even. Only applies if is.integer(x).

nThread

Number of threads to use.

Value

For are_even, a logical vector the same length as x, TRUE whenever x is even.

For which_are_even the integer positions of even values in x.