Trait delta_encoding::DeltaEncoderExt
source · [−]pub trait DeltaEncoderExt: Iterator where
<Self as Iterator>::Item: Default + Copy + WrappingSub, {
fn deltas(self) -> DeltaEncoderIter<Self>ⓘNotable traits for DeltaEncoderIter<I>impl<I> Iterator for DeltaEncoderIter<I> where
I: Iterator,
<I as Iterator>::Item: WrappingSub + Copy, type Item = I::Item;
where
Self: Sized,
{ ... }
}Provided Methods
fn deltas(self) -> DeltaEncoderIter<Self>ⓘNotable traits for DeltaEncoderIter<I>impl<I> Iterator for DeltaEncoderIter<I> where
I: Iterator,
<I as Iterator>::Item: WrappingSub + Copy, type Item = I::Item; where
Self: Sized,
fn deltas(self) -> DeltaEncoderIter<Self>ⓘNotable traits for DeltaEncoderIter<I>impl<I> Iterator for DeltaEncoderIter<I> where
I: Iterator,
<I as Iterator>::Item: WrappingSub + Copy, type Item = I::Item; where
Self: Sized,
I: Iterator,
<I as Iterator>::Item: WrappingSub + Copy, type Item = I::Item;
Construct a delta-encoded iterator from an iterator.
The first element of the iterator is used as the starting point for the delta-encoding.
Note that unlike the [DeltaEncoder.encode] method, this method will panic if the delta is too large.
Example
use delta_encoding::DeltaEncoderExt;
// Consuming original data into a delta-encoded iterator.
let mut encoded: Vec<i64> = vec![1, 2, 5, 4, 2].into_iter().deltas().collect();
assert_eq!(encoded, vec![1, 1, 3, -1, -2]);
// Non-consuming original data, but avoiding the allocation of a new vector.
let mut encoded: Vec<i64> = vec![1, 2, 5, 4, 2].iter().copied().deltas().collect();
assert_eq!(encoded, vec![1, 1, 3, -1, -2]);