5 releases
Uses old Rust 2015
0.1.5 | Oct 23, 2018 |
---|---|
0.1.4 | Oct 22, 2018 |
0.1.3 | Aug 5, 2018 |
#2680 in Rust patterns
1,312 downloads per month
9KB
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rev_slice
A simple alternative to negative indexing on rust slices
Ever wanted a[-1]
in Rust? With this crate, you can do that as a.rev()[0]
.
Also provided are the other slice methods on the reversed slice, and you can
.rev()
again to get the original slice back. So you can, for example,
remove the last element of a slice with a.rev()[1..].rev()
.
lib.rs
:
Offers a reversed view into a slice.
To use, import the SliceExt
trait to get the .rev()
and .rev_mut
extension methods on slices. Then treat the returned RevSlice
like
you would an ordinary slice: index it, split it, iterate it, whatever.
Example:
extern crate rev_slice;
use rev_slice::SliceExt;
let r = [1, 2, 4, 9, 16, 25].rev();
assert_eq!(r[0], 25);
assert_eq!(r[1..3].rev(), &[9, 16]);
assert_eq!(r.split_first().unwrap().0, &25);
let mut it = r.iter().cloned().skip(2);
assert_eq!(it.next(), Some(9));
assert_eq!(it.next(), Some(4));
assert_eq!(it.next(), Some(2));