A Scalar holds a single value of an Arrow type.
$ToString(): convert to a string
$as_vector(): convert to an R vector
$as_array(): convert to an Arrow Array
$Equals(other): is this Scalar equal to other
$ApproxEquals(other): is this Scalar approximately equal to other
$is_valid: is this Scalar valid
$null_count: number of invalid values - 1 or 0
$type: Scalar type
Scalar$create(pi) #> Scalar #> 3.141592653589793 Scalar$create(404) #> Scalar #> 404 # If you pass a vector into Scalar$create, you get a list containing your items Scalar$create(c(1, 2, 3)) #> Scalar #> ... # Comparisons my_scalar <- Scalar$create(99) my_scalar$ApproxEquals(Scalar$create(99.00001)) # FALSE #> [1] FALSE my_scalar$ApproxEquals(Scalar$create(99.000009)) # TRUE #> [1] TRUE my_scalar$Equals(Scalar$create(99.000009)) # FALSE #> [1] FALSE my_scalar$Equals(Scalar$create(99L)) # FALSE (types don't match) #> [1] FALSE my_scalar$ToString() #> [1] "99"