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Change the doctest example to slide

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Batch-insert is better done with Vec::splice
This commit is contained in:
Scott McMurray 2017-05-01 09:17:21 -07:00
parent c05676b97f
commit ebc8489526
1 changed files with 12 additions and 9 deletions
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21
src/libcollections/slice.rs
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@ -1373,16 +1373,19 @@ impl<T> [T] {
/// a.rotate(k);
/// assert_eq!(&a, &[1, 2, 3, 4, 5, 6, 7]);
///
/// fn extend_at<T, I>(v: &mut Vec<T>, index: usize, iter: I)
/// where I: Iterator<Item=T>
/// {
/// let mid = v.len() - index;
/// v.extend(iter);
/// v[index..].rotate(mid);
/// use std::ops::Range;
/// fn slide<T>(slice: &mut [T], range: Range<usize>, to: usize) {
/// if to < range.start {
/// slice[to..range.end].rotate(range.start-to);
/// } else if to > range.end {
/// slice[range.start..to].rotate(range.end-range.start);
/// }
/// }
/// let mut v = (0..10).collect();
/// extend_at(&mut v, 7, 100..104);
/// assert_eq!(&v, &[0, 1, 2, 3, 4, 5, 6, 100, 101, 102, 103, 7, 8, 9]);
/// let mut v: Vec<_> = (0..10).collect();
/// slide(&mut v, 1..4, 7);
/// assert_eq!(&v, &[0, 4, 5, 6, 1, 2, 3, 7, 8, 9]);
/// slide(&mut v, 6..8, 1);
/// assert_eq!(&v, &[0, 3, 7, 4, 5, 6, 1, 2, 8, 9]);
/// ```
#[unstable(feature = "slice_rotate", issue = "123456789")]
pub fn rotate(&mut self, mid: usize) -> usize {