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Add Record::drain implementation

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This commit is contained in:
Ian Manske 2024-04-22 18:03:55 -04:00
parent 7e38cc0363
commit 50313b89c1
1 changed files with 10 additions and 7 deletions
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17
crates/nu-protocol/src/value/record.rs
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@ -260,10 +260,9 @@ impl Record {
where
R: RangeBounds<usize> + Clone,
{
todo!()
// Drain {
// iter: self.inner.drain(range),
// }
Drain {
iter: self.inner[(range.start_bound().cloned(), range.end_bound().cloned())].iter(),
}
}
/// Sort the record by its columns.
@ -630,14 +629,16 @@ impl ExactSizeIterator for IntoValues {
impl FusedIterator for IntoValues {}
pub struct Drain<'a> {
iter: std::vec::Drain<'a, (String, Value)>,
iter: std::slice::Iter<'a, (String, Value)>,
}
impl Iterator for Drain<'_> {
type Item = (String, Value);
fn next(&mut self) -> Option<Self::Item> {
self.iter.next()
self.iter
.next()
.map(|(col, val)| (col.clone(), val.clone()))
}
fn size_hint(&self) -> (usize, Option<usize>) {
@ -647,7 +648,9 @@ impl Iterator for Drain<'_> {
impl DoubleEndedIterator for Drain<'_> {
fn next_back(&mut self) -> Option<Self::Item> {
self.iter.next_back()
self.iter
.next_back()
.map(|(col, val)| (col.clone(), val.clone()))
}
}