Trait extendr_api::iter::AsStrIter
source · pub trait AsStrIter:
GetSexp
+ Types
+ Length
+ Attributes
+ Rinternals {
// Provided method
fn as_str_iter(&self) -> Option<StrIter> { ... }
}
Provided Methods§
sourcefn as_str_iter(&self) -> Option<StrIter>
fn as_str_iter(&self) -> Option<StrIter>
Get an iterator over a string vector. Returns None if the object is not a string vector but works for factors.
use extendr_api::prelude::*;
test! {
let obj = Robj::from(vec!["a", "b", "c"]);
assert_eq!(obj.as_str_iter().unwrap().collect::<Vec<_>>(), vec!["a", "b", "c"]);
let factor = factor!(vec!["abcd", "def", "fg", "fg"]);
assert_eq!(factor.levels().unwrap().collect::<Vec<_>>(), vec!["abcd", "def", "fg"]);
assert_eq!(factor.as_integer_vector().unwrap(), vec![1, 2, 3, 3]);
assert_eq!(factor.as_str_iter().unwrap().collect::<Vec<_>>(), vec!["abcd", "def", "fg", "fg"]);
assert_eq!(factor.as_str_iter().unwrap().collect::<Vec<_>>(), vec!["abcd", "def", "fg", "fg"]);
let obj = Robj::from(vec![Some("a"), Some("b"), None]);
assert_eq!(obj.as_str_iter().unwrap().map(|s| s.is_na()).collect::<Vec<_>>(), vec![false, false, true]);
let obj = Robj::from(vec!["a", "b", <&str>::na()]);
assert_eq!(obj.as_str_iter().unwrap().map(|s| s.is_na()).collect::<Vec<_>>(), vec![false, false, true]);
let obj = Robj::from(vec!["a", "b", "NA"]);
assert_eq!(obj.as_str_iter().unwrap().map(|s| s.is_na()).collect::<Vec<_>>(), vec![false, false, false]);
}
Object Safety§
This trait is not object safe.