Trait extendr_api::prelude::RobjItertools
source · [−]pub trait RobjItertools: Iterator {
fn collect_robj(self) -> Robj
where
Self: Iterator,
Self: Sized,
Self::Item: ToVectorValue,
{ ... }
}Expand description
Extensions to iterators for R objects including RobjItertools::collect_robj().
Provided methods
fn collect_robj(self) -> Robj where
Self: Iterator,
Self: Sized,
Self::Item: ToVectorValue,
fn collect_robj(self) -> Robj where
Self: Iterator,
Self: Sized,
Self::Item: ToVectorValue,
Convert a wide range of iterators to Robj.
use extendr_api::prelude::*;
test! {
// Integer iterators.
let robj = (0..3).collect_robj();
assert_eq!(robj.as_integer_vector().unwrap(), vec![0, 1, 2]);
// Logical iterators.
let robj = (0..3).map(|x| x % 2 == 0).collect_robj();
assert_eq!(robj.as_logical_vector().unwrap(), vec![TRUE, FALSE, TRUE]);
// Numeric iterators.
let robj = (0..3).map(|x| x as f64).collect_robj();
assert_eq!(robj.as_real_vector().unwrap(), vec![0., 1., 2.]);
// String iterators.
let robj = (0..3).map(|x| format!("{}", x)).collect_robj();
assert_eq!(robj.as_str_vector(), Some(vec!["0", "1", "2"]));
}