Arrow scalars

A Scalar holds a single value of an Arrow type.

Methods

$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

Examples

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"