Struct ocl_core_vector::Int2
[−]
[src]
pub struct Int2(_);
Methods
impl Int2
[src]
impl Int2
[src]
Methods from Deref<Target = [i32]>
fn len(&self) -> usize
1.0.0
fn is_empty(&self) -> bool
1.0.0
fn first(&self) -> Option<&T>
1.0.0
Returns the first element of the slice, or None
if it is empty.
Examples
let v = [10, 40, 30]; assert_eq!(Some(&10), v.first()); let w: &[i32] = &[]; assert_eq!(None, w.first());
fn first_mut(&mut self) -> Option<&mut T>
1.0.0
Returns a mutable pointer to the first element of the slice, or None
if it is empty.
Examples
let x = &mut [0, 1, 2]; if let Some(first) = x.first_mut() { *first = 5; } assert_eq!(x, &[5, 1, 2]);
fn split_first(&self) -> Option<(&T, &[T])>
1.5.0
Returns the first and all the rest of the elements of the slice, or None
if it is empty.
Examples
let x = &[0, 1, 2]; if let Some((first, elements)) = x.split_first() { assert_eq!(first, &0); assert_eq!(elements, &[1, 2]); }
fn split_first_mut(&mut self) -> Option<(&mut T, &mut [T])>
1.5.0
Returns the first and all the rest of the elements of the slice, or None
if it is empty.
Examples
let x = &mut [0, 1, 2]; if let Some((first, elements)) = x.split_first_mut() { *first = 3; elements[0] = 4; elements[1] = 5; } assert_eq!(x, &[3, 4, 5]);
fn split_last(&self) -> Option<(&T, &[T])>
1.5.0
Returns the last and all the rest of the elements of the slice, or None
if it is empty.
Examples
let x = &[0, 1, 2]; if let Some((last, elements)) = x.split_last() { assert_eq!(last, &2); assert_eq!(elements, &[0, 1]); }
fn split_last_mut(&mut self) -> Option<(&mut T, &mut [T])>
1.5.0
Returns the last and all the rest of the elements of the slice, or None
if it is empty.
Examples
let x = &mut [0, 1, 2]; if let Some((last, elements)) = x.split_last_mut() { *last = 3; elements[0] = 4; elements[1] = 5; } assert_eq!(x, &[4, 5, 3]);
fn last(&self) -> Option<&T>
1.0.0
Returns the last element of the slice, or None
if it is empty.
Examples
let v = [10, 40, 30]; assert_eq!(Some(&30), v.last()); let w: &[i32] = &[]; assert_eq!(None, w.last());
fn last_mut(&mut self) -> Option<&mut T>
1.0.0
Returns a mutable pointer to the last item in the slice.
Examples
let x = &mut [0, 1, 2]; if let Some(last) = x.last_mut() { *last = 10; } assert_eq!(x, &[0, 1, 10]);
fn get<I>(&self, index: I) -> Option<&I::Output> where
I: SliceIndex<[T]>,
1.0.0
I: SliceIndex<[T]>,
Returns a reference to an element or subslice depending on the type of index.
- If given a position, returns a reference to the element at that
position or
None
if out of bounds. - If given a range, returns the subslice corresponding to that range,
or
None
if out of bounds.
Examples
let v = [10, 40, 30]; assert_eq!(Some(&40), v.get(1)); assert_eq!(Some(&[10, 40][..]), v.get(0..2)); assert_eq!(None, v.get(3)); assert_eq!(None, v.get(0..4));
fn get_mut<I>(&mut self, index: I) -> Option<&mut I::Output> where
I: SliceIndex<[T]>,
1.0.0
I: SliceIndex<[T]>,
Returns a mutable reference to an element or subslice depending on the
type of index (see get
) or None
if the index is out of bounds.
Examples
let x = &mut [0, 1, 2]; if let Some(elem) = x.get_mut(1) { *elem = 42; } assert_eq!(x, &[0, 42, 2]);
unsafe fn get_unchecked<I>(&self, index: I) -> &I::Output where
I: SliceIndex<[T]>,
1.0.0
I: SliceIndex<[T]>,
Returns a reference to an element or subslice, without doing bounds checking. So use it very carefully!
Examples
let x = &[1, 2, 4]; unsafe { assert_eq!(x.get_unchecked(1), &2); }
unsafe fn get_unchecked_mut<I>(&mut self, index: I) -> &mut I::Output where
I: SliceIndex<[T]>,
1.0.0
I: SliceIndex<[T]>,
Returns a mutable reference to an element or subslice, without doing bounds checking. So use it very carefully!
Examples
let x = &mut [1, 2, 4]; unsafe { let elem = x.get_unchecked_mut(1); *elem = 13; } assert_eq!(x, &[1, 13, 4]);
fn as_ptr(&self) -> *const T
1.0.0
Returns a raw pointer to the slice's buffer.
The caller must ensure that the slice outlives the pointer this function returns, or else it will end up pointing to garbage.
Modifying the container referenced by this slice may cause its buffer to be reallocated, which would also make any pointers to it invalid.
Examples
let x = &[1, 2, 4]; let x_ptr = x.as_ptr(); unsafe { for i in 0..x.len() { assert_eq!(x.get_unchecked(i), &*x_ptr.offset(i as isize)); } }
fn as_mut_ptr(&mut self) -> *mut T
1.0.0
Returns an unsafe mutable pointer to the slice's buffer.
The caller must ensure that the slice outlives the pointer this function returns, or else it will end up pointing to garbage.
Modifying the container referenced by this slice may cause its buffer to be reallocated, which would also make any pointers to it invalid.
Examples
let x = &mut [1, 2, 4]; let x_ptr = x.as_mut_ptr(); unsafe { for i in 0..x.len() { *x_ptr.offset(i as isize) += 2; } } assert_eq!(x, &[3, 4, 6]);
fn swap(&mut self, a: usize, b: usize)
1.0.0
Swaps two elements in the slice.
Arguments
- a - The index of the first element
- b - The index of the second element
Panics
Panics if a
or b
are out of bounds.
Examples
let mut v = ["a", "b", "c", "d"]; v.swap(1, 3); assert!(v == ["a", "d", "c", "b"]);
fn reverse(&mut self)
1.0.0
Reverses the order of elements in the slice, in place.
Example
let mut v = [1, 2, 3]; v.reverse(); assert!(v == [3, 2, 1]);
fn iter(&self) -> Iter<T>
1.0.0
Returns an iterator over the slice.
Examples
let x = &[1, 2, 4]; let mut iterator = x.iter(); assert_eq!(iterator.next(), Some(&1)); assert_eq!(iterator.next(), Some(&2)); assert_eq!(iterator.next(), Some(&4)); assert_eq!(iterator.next(), None);
fn iter_mut(&mut self) -> IterMut<T>
1.0.0
Returns an iterator that allows modifying each value.
Examples
let x = &mut [1, 2, 4]; for elem in x.iter_mut() { *elem += 2; } assert_eq!(x, &[3, 4, 6]);
fn windows(&self, size: usize) -> Windows<T>
1.0.0
Returns an iterator over all contiguous windows of length
size
. The windows overlap. If the slice is shorter than
size
, the iterator returns no values.
Panics
Panics if size
is 0.
Example
let slice = ['r', 'u', 's', 't']; let mut iter = slice.windows(2); assert_eq!(iter.next().unwrap(), &['r', 'u']); assert_eq!(iter.next().unwrap(), &['u', 's']); assert_eq!(iter.next().unwrap(), &['s', 't']); assert!(iter.next().is_none());
If the slice is shorter than size
:
let slice = ['f', 'o', 'o']; let mut iter = slice.windows(4); assert!(iter.next().is_none());
fn chunks(&self, size: usize) -> Chunks<T>
1.0.0
Returns an iterator over size
elements of the slice at a
time. The chunks are slices and do not overlap. If size
does
not divide the length of the slice, then the last chunk will
not have length size
.
Panics
Panics if size
is 0.
Example
let slice = ['l', 'o', 'r', 'e', 'm']; let mut iter = slice.chunks(2); assert_eq!(iter.next().unwrap(), &['l', 'o']); assert_eq!(iter.next().unwrap(), &['r', 'e']); assert_eq!(iter.next().unwrap(), &['m']); assert!(iter.next().is_none());
fn chunks_mut(&mut self, chunk_size: usize) -> ChunksMut<T>
1.0.0
Returns an iterator over chunk_size
elements of the slice at a time.
The chunks are mutable slices, and do not overlap. If chunk_size
does
not divide the length of the slice, then the last chunk will not
have length chunk_size
.
Panics
Panics if chunk_size
is 0.
Examples
let v = &mut [0, 0, 0, 0, 0]; let mut count = 1; for chunk in v.chunks_mut(2) { for elem in chunk.iter_mut() { *elem += count; } count += 1; } assert_eq!(v, &[1, 1, 2, 2, 3]);
fn split_at(&self, mid: usize) -> (&[T], &[T])
1.0.0
Divides one slice into two at an index.
The first will contain all indices from [0, mid)
(excluding
the index mid
itself) and the second will contain all
indices from [mid, len)
(excluding the index len
itself).
Panics
Panics if mid > len
.
Examples
let v = [10, 40, 30, 20, 50]; let (v1, v2) = v.split_at(2); assert_eq!([10, 40], v1); assert_eq!([30, 20, 50], v2);
fn split_at_mut(&mut self, mid: usize) -> (&mut [T], &mut [T])
1.0.0
Divides one &mut
into two at an index.
The first will contain all indices from [0, mid)
(excluding
the index mid
itself) and the second will contain all
indices from [mid, len)
(excluding the index len
itself).
Panics
Panics if mid > len
.
Examples
let mut v = [1, 2, 3, 4, 5, 6]; // scoped to restrict the lifetime of the borrows { let (left, right) = v.split_at_mut(0); assert!(left == []); assert!(right == [1, 2, 3, 4, 5, 6]); } { let (left, right) = v.split_at_mut(2); assert!(left == [1, 2]); assert!(right == [3, 4, 5, 6]); } { let (left, right) = v.split_at_mut(6); assert!(left == [1, 2, 3, 4, 5, 6]); assert!(right == []); }
fn split<F>(&self, pred: F) -> Split<T, F> where
F: FnMut(&T) -> bool,
1.0.0
F: FnMut(&T) -> bool,
Returns an iterator over subslices separated by elements that match
pred
. The matched element is not contained in the subslices.
Examples
let slice = [10, 40, 33, 20]; let mut iter = slice.split(|num| num % 3 == 0); assert_eq!(iter.next().unwrap(), &[10, 40]); assert_eq!(iter.next().unwrap(), &[20]); assert!(iter.next().is_none());
If the first element is matched, an empty slice will be the first item returned by the iterator. Similarly, if the last element in the slice is matched, an empty slice will be the last item returned by the iterator:
let slice = [10, 40, 33]; let mut iter = slice.split(|num| num % 3 == 0); assert_eq!(iter.next().unwrap(), &[10, 40]); assert_eq!(iter.next().unwrap(), &[]); assert!(iter.next().is_none());
If two matched elements are directly adjacent, an empty slice will be present between them:
let slice = [10, 6, 33, 20]; let mut iter = slice.split(|num| num % 3 == 0); assert_eq!(iter.next().unwrap(), &[10]); assert_eq!(iter.next().unwrap(), &[]); assert_eq!(iter.next().unwrap(), &[20]); assert!(iter.next().is_none());
fn split_mut<F>(&mut self, pred: F) -> SplitMut<T, F> where
F: FnMut(&T) -> bool,
1.0.0
F: FnMut(&T) -> bool,
Returns an iterator over mutable subslices separated by elements that
match pred
. The matched element is not contained in the subslices.
Examples
let mut v = [10, 40, 30, 20, 60, 50]; for group in v.split_mut(|num| *num % 3 == 0) { group[0] = 1; } assert_eq!(v, [1, 40, 30, 1, 60, 1]);
fn rsplit<F>(&self, pred: F) -> RSplit<T, F> where
F: FnMut(&T) -> bool,
F: FnMut(&T) -> bool,
slice_rsplit
)Returns an iterator over subslices separated by elements that match
pred
, starting at the end of the slice and working backwards.
The matched element is not contained in the subslices.
Examples
#![feature(slice_rsplit)] let slice = [11, 22, 33, 0, 44, 55]; let mut iter = slice.rsplit(|num| *num == 0); assert_eq!(iter.next().unwrap(), &[44, 55]); assert_eq!(iter.next().unwrap(), &[11, 22, 33]); assert_eq!(iter.next(), None);
As with split()
, if the first or last element is matched, an empty
slice will be the first (or last) item returned by the iterator.
#![feature(slice_rsplit)] let v = &[0, 1, 1, 2, 3, 5, 8]; let mut it = v.rsplit(|n| *n % 2 == 0); assert_eq!(it.next().unwrap(), &[]); assert_eq!(it.next().unwrap(), &[3, 5]); assert_eq!(it.next().unwrap(), &[1, 1]); assert_eq!(it.next().unwrap(), &[]); assert_eq!(it.next(), None);
fn rsplit_mut<F>(&mut self, pred: F) -> RSplitMut<T, F> where
F: FnMut(&T) -> bool,
F: FnMut(&T) -> bool,
slice_rsplit
)Returns an iterator over mutable subslices separated by elements that
match pred
, starting at the end of the slice and working
backwards. The matched element is not contained in the subslices.
Examples
#![feature(slice_rsplit)] let mut v = [100, 400, 300, 200, 600, 500]; let mut count = 0; for group in v.rsplit_mut(|num| *num % 3 == 0) { count += 1; group[0] = count; } assert_eq!(v, [3, 400, 300, 2, 600, 1]);
fn splitn<F>(&self, n: usize, pred: F) -> SplitN<T, F> where
F: FnMut(&T) -> bool,
1.0.0
F: FnMut(&T) -> bool,
Returns an iterator over subslices separated by elements that match
pred
, limited to returning at most n
items. The matched element is
not contained in the subslices.
The last element returned, if any, will contain the remainder of the slice.
Examples
Print the slice split once by numbers divisible by 3 (i.e. [10, 40]
,
[20, 60, 50]
):
let v = [10, 40, 30, 20, 60, 50]; for group in v.splitn(2, |num| *num % 3 == 0) { println!("{:?}", group); }
fn splitn_mut<F>(&mut self, n: usize, pred: F) -> SplitNMut<T, F> where
F: FnMut(&T) -> bool,
1.0.0
F: FnMut(&T) -> bool,
Returns an iterator over subslices separated by elements that match
pred
, limited to returning at most n
items. The matched element is
not contained in the subslices.
The last element returned, if any, will contain the remainder of the slice.
Examples
let mut v = [10, 40, 30, 20, 60, 50]; for group in v.splitn_mut(2, |num| *num % 3 == 0) { group[0] = 1; } assert_eq!(v, [1, 40, 30, 1, 60, 50]);
fn rsplitn<F>(&self, n: usize, pred: F) -> RSplitN<T, F> where
F: FnMut(&T) -> bool,
1.0.0
F: FnMut(&T) -> bool,
Returns an iterator over subslices separated by elements that match
pred
limited to returning at most n
items. This starts at the end of
the slice and works backwards. The matched element is not contained in
the subslices.
The last element returned, if any, will contain the remainder of the slice.
Examples
Print the slice split once, starting from the end, by numbers divisible
by 3 (i.e. [50]
, [10, 40, 30, 20]
):
let v = [10, 40, 30, 20, 60, 50]; for group in v.rsplitn(2, |num| *num % 3 == 0) { println!("{:?}", group); }
fn rsplitn_mut<F>(&mut self, n: usize, pred: F) -> RSplitNMut<T, F> where
F: FnMut(&T) -> bool,
1.0.0
F: FnMut(&T) -> bool,
Returns an iterator over subslices separated by elements that match
pred
limited to returning at most n
items. This starts at the end of
the slice and works backwards. The matched element is not contained in
the subslices.
The last element returned, if any, will contain the remainder of the slice.
Examples
let mut s = [10, 40, 30, 20, 60, 50]; for group in s.rsplitn_mut(2, |num| *num % 3 == 0) { group[0] = 1; } assert_eq!(s, [1, 40, 30, 20, 60, 1]);
fn contains(&self, x: &T) -> bool where
T: PartialEq<T>,
1.0.0
T: PartialEq<T>,
Returns true
if the slice contains an element with the given value.
Examples
let v = [10, 40, 30]; assert!(v.contains(&30)); assert!(!v.contains(&50));
fn starts_with(&self, needle: &[T]) -> bool where
T: PartialEq<T>,
1.0.0
T: PartialEq<T>,
Returns true
if needle
is a prefix of the slice.
Examples
let v = [10, 40, 30]; assert!(v.starts_with(&[10])); assert!(v.starts_with(&[10, 40])); assert!(!v.starts_with(&[50])); assert!(!v.starts_with(&[10, 50]));
Always returns true
if needle
is an empty slice:
let v = &[10, 40, 30]; assert!(v.starts_with(&[])); let v: &[u8] = &[]; assert!(v.starts_with(&[]));
fn ends_with(&self, needle: &[T]) -> bool where
T: PartialEq<T>,
1.0.0
T: PartialEq<T>,
Returns true
if needle
is a suffix of the slice.
Examples
let v = [10, 40, 30]; assert!(v.ends_with(&[30])); assert!(v.ends_with(&[40, 30])); assert!(!v.ends_with(&[50])); assert!(!v.ends_with(&[50, 30]));
Always returns true
if needle
is an empty slice:
let v = &[10, 40, 30]; assert!(v.ends_with(&[])); let v: &[u8] = &[]; assert!(v.ends_with(&[]));
fn binary_search(&self, x: &T) -> Result<usize, usize> where
T: Ord,
1.0.0
T: Ord,
Binary searches this sorted slice for a given element.
If the value is found then Ok
is returned, containing the
index of the matching element; if the value is not found then
Err
is returned, containing the index where a matching
element could be inserted while maintaining sorted order.
Example
Looks up a series of four elements. The first is found, with a
uniquely determined position; the second and third are not
found; the fourth could match any position in [1, 4]
.
let s = [0, 1, 1, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]; assert_eq!(s.binary_search(&13), Ok(9)); assert_eq!(s.binary_search(&4), Err(7)); assert_eq!(s.binary_search(&100), Err(13)); let r = s.binary_search(&1); assert!(match r { Ok(1...4) => true, _ => false, });
fn binary_search_by<'a, F>(&'a self, f: F) -> Result<usize, usize> where
F: FnMut(&'a T) -> Ordering,
1.0.0
F: FnMut(&'a T) -> Ordering,
Binary searches this sorted slice with a comparator function.
The comparator function should implement an order consistent
with the sort order of the underlying slice, returning an
order code that indicates whether its argument is Less
,
Equal
or Greater
the desired target.
If a matching value is found then returns Ok
, containing
the index for the matched element; if no match is found then
Err
is returned, containing the index where a matching
element could be inserted while maintaining sorted order.
Example
Looks up a series of four elements. The first is found, with a
uniquely determined position; the second and third are not
found; the fourth could match any position in [1, 4]
.
let s = [0, 1, 1, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]; let seek = 13; assert_eq!(s.binary_search_by(|probe| probe.cmp(&seek)), Ok(9)); let seek = 4; assert_eq!(s.binary_search_by(|probe| probe.cmp(&seek)), Err(7)); let seek = 100; assert_eq!(s.binary_search_by(|probe| probe.cmp(&seek)), Err(13)); let seek = 1; let r = s.binary_search_by(|probe| probe.cmp(&seek)); assert!(match r { Ok(1...4) => true, _ => false, });
fn binary_search_by_key<'a, B, F>(&'a self, b: &B, f: F) -> Result<usize, usize> where
B: Ord,
F: FnMut(&'a T) -> B,
1.10.0
B: Ord,
F: FnMut(&'a T) -> B,
Binary searches this sorted slice with a key extraction function.
Assumes that the slice is sorted by the key, for instance with
sort_by_key
using the same key extraction function.
If a matching value is found then returns Ok
, containing the
index for the matched element; if no match is found then Err
is returned, containing the index where a matching element could
be inserted while maintaining sorted order.
Examples
Looks up a series of four elements in a slice of pairs sorted by
their second elements. The first is found, with a uniquely
determined position; the second and third are not found; the
fourth could match any position in [1, 4]
.
let s = [(0, 0), (2, 1), (4, 1), (5, 1), (3, 1), (1, 2), (2, 3), (4, 5), (5, 8), (3, 13), (1, 21), (2, 34), (4, 55)]; assert_eq!(s.binary_search_by_key(&13, |&(a,b)| b), Ok(9)); assert_eq!(s.binary_search_by_key(&4, |&(a,b)| b), Err(7)); assert_eq!(s.binary_search_by_key(&100, |&(a,b)| b), Err(13)); let r = s.binary_search_by_key(&1, |&(a,b)| b); assert!(match r { Ok(1...4) => true, _ => false, });
fn sort(&mut self) where
T: Ord,
1.0.0
T: Ord,
Sorts the slice.
This sort is stable (i.e. does not reorder equal elements) and O(n log n)
worst-case.
Current implementation
The current algorithm is an adaptive, iterative merge sort inspired by timsort. It is designed to be very fast in cases where the slice is nearly sorted, or consists of two or more sorted sequences concatenated one after another.
Also, it allocates temporary storage half the size of self
, but for short slices a
non-allocating insertion sort is used instead.
Examples
let mut v = [-5, 4, 1, -3, 2]; v.sort(); assert!(v == [-5, -3, 1, 2, 4]);
fn sort_by<F>(&mut self, compare: F) where
F: FnMut(&T, &T) -> Ordering,
1.0.0
F: FnMut(&T, &T) -> Ordering,
Sorts the slice with a comparator function.
This sort is stable (i.e. does not reorder equal elements) and O(n log n)
worst-case.
Current implementation
The current algorithm is an adaptive, iterative merge sort inspired by timsort. It is designed to be very fast in cases where the slice is nearly sorted, or consists of two or more sorted sequences concatenated one after another.
Also, it allocates temporary storage half the size of self
, but for short slices a
non-allocating insertion sort is used instead.
Examples
let mut v = [5, 4, 1, 3, 2]; v.sort_by(|a, b| a.cmp(b)); assert!(v == [1, 2, 3, 4, 5]); // reverse sorting v.sort_by(|a, b| b.cmp(a)); assert!(v == [5, 4, 3, 2, 1]);
fn sort_by_key<B, F>(&mut self, f: F) where
B: Ord,
F: FnMut(&T) -> B,
1.7.0
B: Ord,
F: FnMut(&T) -> B,
Sorts the slice with a key extraction function.
This sort is stable (i.e. does not reorder equal elements) and O(n log n)
worst-case.
Current implementation
The current algorithm is an adaptive, iterative merge sort inspired by timsort. It is designed to be very fast in cases where the slice is nearly sorted, or consists of two or more sorted sequences concatenated one after another.
Also, it allocates temporary storage half the size of self
, but for short slices a
non-allocating insertion sort is used instead.
Examples
let mut v = [-5i32, 4, 1, -3, 2]; v.sort_by_key(|k| k.abs()); assert!(v == [1, 2, -3, 4, -5]);
fn sort_unstable(&mut self) where
T: Ord,
T: Ord,
sort_unstable
)Sorts the slice, but may not preserve the order of equal elements.
This sort is unstable (i.e. may reorder equal elements), in-place (i.e. does not allocate),
and O(n log n)
worst-case.
Current implementation
The current algorithm is based on Orson Peters' pattern-defeating quicksort, which is a quicksort variant designed to be very fast on certain kinds of patterns, sometimes achieving linear time. It is randomized but deterministic, and falls back to heapsort on degenerate inputs.
It is generally faster than stable sorting, except in a few special cases, e.g. when the slice consists of several concatenated sorted sequences.
Examples
#![feature(sort_unstable)] let mut v = [-5, 4, 1, -3, 2]; v.sort_unstable(); assert!(v == [-5, -3, 1, 2, 4]);
fn sort_unstable_by<F>(&mut self, compare: F) where
F: FnMut(&T, &T) -> Ordering,
F: FnMut(&T, &T) -> Ordering,
sort_unstable
)Sorts the slice with a comparator function, but may not preserve the order of equal elements.
This sort is unstable (i.e. may reorder equal elements), in-place (i.e. does not allocate),
and O(n log n)
worst-case.
Current implementation
The current algorithm is based on Orson Peters' pattern-defeating quicksort, which is a quicksort variant designed to be very fast on certain kinds of patterns, sometimes achieving linear time. It is randomized but deterministic, and falls back to heapsort on degenerate inputs.
It is generally faster than stable sorting, except in a few special cases, e.g. when the slice consists of several concatenated sorted sequences.
Examples
#![feature(sort_unstable)] let mut v = [5, 4, 1, 3, 2]; v.sort_unstable_by(|a, b| a.cmp(b)); assert!(v == [1, 2, 3, 4, 5]); // reverse sorting v.sort_unstable_by(|a, b| b.cmp(a)); assert!(v == [5, 4, 3, 2, 1]);
fn sort_unstable_by_key<B, F>(&mut self, f: F) where
B: Ord,
F: FnMut(&T) -> B,
B: Ord,
F: FnMut(&T) -> B,
sort_unstable
)Sorts the slice with a key extraction function, but may not preserve the order of equal elements.
This sort is unstable (i.e. may reorder equal elements), in-place (i.e. does not allocate),
and O(n log n)
worst-case.
Current implementation
The current algorithm is based on Orson Peters' pattern-defeating quicksort, which is a quicksort variant designed to be very fast on certain kinds of patterns, sometimes achieving linear time. It is randomized but deterministic, and falls back to heapsort on degenerate inputs.
It is generally faster than stable sorting, except in a few special cases, e.g. when the slice consists of several concatenated sorted sequences.
Examples
#![feature(sort_unstable)] let mut v = [-5i32, 4, 1, -3, 2]; v.sort_unstable_by_key(|k| k.abs()); assert!(v == [1, 2, -3, 4, -5]);
fn clone_from_slice(&mut self, src: &[T]) where
T: Clone,
1.7.0
T: Clone,
Copies the elements from src
into self
.
The length of src
must be the same as self
.
Panics
This function will panic if the two slices have different lengths.
Example
let mut dst = [0, 0, 0]; let src = [1, 2, 3]; dst.clone_from_slice(&src); assert!(dst == [1, 2, 3]);
fn copy_from_slice(&mut self, src: &[T]) where
T: Copy,
1.9.0
T: Copy,
Copies all elements from src
into self
, using a memcpy.
The length of src
must be the same as self
.
Panics
This function will panic if the two slices have different lengths.
Example
let mut dst = [0, 0, 0]; let src = [1, 2, 3]; dst.copy_from_slice(&src); assert_eq!(src, dst);
fn to_vec(&self) -> Vec<T> where
T: Clone,
1.0.0
T: Clone,
Copies self
into a new Vec
.
Examples
let s = [10, 40, 30]; let x = s.to_vec(); // Here, `s` and `x` can be modified independently.
fn into_vec(self: Box<[T]>) -> Vec<T>
1.0.0
Converts self
into a vector without clones or allocation.
Examples
let s: Box<[i32]> = Box::new([10, 40, 30]); let x = s.into_vec(); // `s` cannot be used anymore because it has been converted into `x`. assert_eq!(x, vec![10, 40, 30]);
Trait Implementations
impl Debug for Int2
[src]
impl Clone for Int2
[src]
fn clone(&self) -> Int2
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0
Performs copy-assignment from source
. Read more
impl Copy for Int2
[src]
impl Default for Int2
[src]
impl PartialOrd for Int2
[src]
fn partial_cmp(&self, __arg_0: &Int2) -> Option<Ordering>
This method returns an ordering between self
and other
values if one exists. Read more
fn lt(&self, __arg_0: &Int2) -> bool
This method tests less than (for self
and other
) and is used by the <
operator. Read more
fn le(&self, __arg_0: &Int2) -> bool
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
fn gt(&self, __arg_0: &Int2) -> bool
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
fn ge(&self, __arg_0: &Int2) -> bool
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl From<[i32; 2]> for Int2
[src]
impl PartialEq for Int2
[src]
fn eq(&self, rhs: &Self) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &Rhs) -> bool
1.0.0
This method tests for !=
.
impl Deref for Int2
[src]
type Target = [i32]
The resulting type after dereferencing
fn deref(&self) -> &[i32]
The method called to dereference a value
impl DerefMut for Int2
[src]
impl Zero for Int2
[src]
fn zero() -> Self
Returns the additive identity element of Self
, 0
. Read more
fn is_zero(&self) -> bool
Returns true
if self
is equal to the additive identity.
impl One for Int2
[src]
impl Display for Int2
[src]
fn fmt(&self, f: &mut Formatter) -> FmtResult
Formats the value using the given formatter. Read more
impl<'a> Add<Int2> for &'a Int2
[src]
type Output = Int2::Output
The resulting type after applying the +
operator
fn add(self, rhs: Int2) -> Int2::Output
The method for the +
operator
impl<'a> Add<&'a Int2> for Int2
[src]
type Output = Int2::Output
The resulting type after applying the +
operator
fn add(self, rhs: &'a Int2) -> Int2::Output
The method for the +
operator
impl<'a, 'b> Add<&'a Int2> for &'b Int2
[src]
type Output = Int2::Output
The resulting type after applying the +
operator
fn add(self, rhs: &'a Int2) -> Int2::Output
The method for the +
operator
impl AddAssign for Int2
[src]
fn add_assign(&mut self, rhs: Int2)
The method for the +=
operator
impl<'a> Sub<Int2> for &'a Int2
[src]
type Output = Int2::Output
The resulting type after applying the -
operator
fn sub(self, rhs: Int2) -> Int2::Output
The method for the -
operator
impl<'a> Sub<&'a Int2> for Int2
[src]
type Output = Int2::Output
The resulting type after applying the -
operator
fn sub(self, rhs: &'a Int2) -> Int2::Output
The method for the -
operator
impl<'a, 'b> Sub<&'a Int2> for &'b Int2
[src]
type Output = Int2::Output
The resulting type after applying the -
operator
fn sub(self, rhs: &'a Int2) -> Int2::Output
The method for the -
operator
impl SubAssign for Int2
[src]
fn sub_assign(&mut self, rhs: Int2)
The method for the -=
operator
impl<'a> Mul<Int2> for &'a Int2
[src]
type Output = Int2::Output
The resulting type after applying the *
operator
fn mul(self, rhs: Int2) -> Int2::Output
The method for the *
operator
impl<'a> Mul<&'a Int2> for Int2
[src]
type Output = Int2::Output
The resulting type after applying the *
operator
fn mul(self, rhs: &'a Int2) -> Int2::Output
The method for the *
operator
impl<'a, 'b> Mul<&'a Int2> for &'b Int2
[src]
type Output = Int2::Output
The resulting type after applying the *
operator
fn mul(self, rhs: &'a Int2) -> Int2::Output
The method for the *
operator
impl MulAssign for Int2
[src]
fn mul_assign(&mut self, rhs: Int2)
The method for the *=
operator
impl<'a> Div<Int2> for &'a Int2
[src]
type Output = Int2::Output
The resulting type after applying the /
operator
fn div(self, rhs: Int2) -> Int2::Output
The method for the /
operator
impl<'a> Div<&'a Int2> for Int2
[src]
type Output = Int2::Output
The resulting type after applying the /
operator
fn div(self, rhs: &'a Int2) -> Int2::Output
The method for the /
operator
impl<'a, 'b> Div<&'a Int2> for &'b Int2
[src]
type Output = Int2::Output
The resulting type after applying the /
operator
fn div(self, rhs: &'a Int2) -> Int2::Output
The method for the /
operator
impl DivAssign for Int2
[src]
fn div_assign(&mut self, rhs: Int2)
The method for the /=
operator
impl<'a> Rem<Int2> for &'a Int2
[src]
type Output = Int2::Output
The resulting type after applying the %
operator
fn rem(self, rhs: Int2) -> Int2::Output
The method for the %
operator
impl<'a> Rem<&'a Int2> for Int2
[src]
type Output = Int2::Output
The resulting type after applying the %
operator
fn rem(self, rhs: &'a Int2) -> Int2::Output
The method for the %
operator
impl<'a, 'b> Rem<&'a Int2> for &'b Int2
[src]
type Output = Int2::Output
The resulting type after applying the %
operator
fn rem(self, rhs: &'a Int2) -> Int2::Output
The method for the %
operator
impl RemAssign for Int2
[src]
fn rem_assign(&mut self, rhs: Int2)
The method for the %=
operator
impl<'a> Neg for &'a Int2
[src]
type Output = Int2::Output
The resulting type after applying the -
operator
fn neg(self) -> Int2::Output
The method for the unary -
operator
impl Sum for Int2
[src]
fn sum<I: Iterator<Item = Int2>>(iter: I) -> Int2
Method which takes an iterator and generates Self
from the elements by "summing up" the items. Read more
impl Product for Int2
[src]
fn product<I: Iterator<Item = Int2>>(iter: I) -> Int2
Method which takes an iterator and generates Self
from the elements by multiplying the items. Read more
impl<'a> Sum<&'a Int2> for Int2
[src]
fn sum<I: Iterator<Item = &'a Int2>>(iter: I) -> Int2
Method which takes an iterator and generates Self
from the elements by "summing up" the items. Read more
impl<'a> Product<&'a Int2> for Int2
[src]
fn product<I: Iterator<Item = &'a Int2>>(iter: I) -> Int2
Method which takes an iterator and generates Self
from the elements by multiplying the items. Read more
impl Eq for Int2
[src]
impl Hash for Int2
[src]
fn hash<H: Hasher>(&self, state: &mut H)
Feeds this value into the state given, updating the hasher as necessary.
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0
H: Hasher,
Feeds a slice of this type into the state provided.
impl Ord for Int2
[src]
fn cmp(&self, other: &Int2) -> Ordering
This method returns an Ordering
between self
and other
. Read more
impl Add for Int2
[src]
type Output = Int2
The resulting type after applying the +
operator
fn add(self, rhs: Int2) -> Int2
The method for the +
operator
impl Sub for Int2
[src]
type Output = Int2
The resulting type after applying the -
operator
fn sub(self, rhs: Int2) -> Int2
The method for the -
operator
impl Mul for Int2
[src]
type Output = Int2
The resulting type after applying the *
operator
fn mul(self, rhs: Int2) -> Int2
The method for the *
operator
impl Div for Int2
[src]
type Output = Int2
The resulting type after applying the /
operator
fn div(self, rhs: Int2) -> Int2
The method for the /
operator
impl Rem for Int2
[src]
type Output = Int2
The resulting type after applying the %
operator
fn rem(self, rhs: Int2) -> Int2
The method for the %
operator
impl Not for Int2
[src]
type Output = Int2
The resulting type after applying the !
operator
fn not(self) -> Int2
The method for the unary !
operator
impl<'a> Not for &'a Int2
[src]
type Output = Int2::Output
The resulting type after applying the !
operator
fn not(self) -> Int2::Output
The method for the unary !
operator
impl BitXor for Int2
[src]
type Output = Int2
The resulting type after applying the ^
operator
fn bitxor(self, rhs: Int2) -> Int2
The method for the ^
operator
impl<'a> BitXor<Int2> for &'a Int2
[src]
type Output = Int2::Output
The resulting type after applying the ^
operator
fn bitxor(self, rhs: Int2) -> Int2::Output
The method for the ^
operator
impl<'a> BitXor<&'a Int2> for Int2
[src]
type Output = Int2::Output
The resulting type after applying the ^
operator
fn bitxor(self, rhs: &'a Int2) -> Int2::Output
The method for the ^
operator
impl<'a, 'b> BitXor<&'a Int2> for &'b Int2
[src]
type Output = Int2::Output
The resulting type after applying the ^
operator
fn bitxor(self, rhs: &'a Int2) -> Int2::Output
The method for the ^
operator
impl BitXorAssign for Int2
[src]
fn bitxor_assign(&mut self, rhs: Int2)
The method for the ^=
operator
impl BitOr for Int2
[src]
type Output = Int2
The resulting type after applying the |
operator
fn bitor(self, rhs: Int2) -> Int2
The method for the |
operator
impl<'a> BitOr<Int2> for &'a Int2
[src]
type Output = Int2::Output
The resulting type after applying the |
operator
fn bitor(self, rhs: Int2) -> Int2::Output
The method for the |
operator
impl<'a> BitOr<&'a Int2> for Int2
[src]
type Output = Int2::Output
The resulting type after applying the |
operator
fn bitor(self, rhs: &'a Int2) -> Int2::Output
The method for the |
operator
impl<'a, 'b> BitOr<&'a Int2> for &'b Int2
[src]
type Output = Int2::Output
The resulting type after applying the |
operator
fn bitor(self, rhs: &'a Int2) -> Int2::Output
The method for the |
operator
impl BitOrAssign for Int2
[src]
fn bitor_assign(&mut self, rhs: Int2)
The method for the |=
operator
impl BitAnd for Int2
[src]
type Output = Int2
The resulting type after applying the &
operator
fn bitand(self, rhs: Int2) -> Int2
The method for the &
operator
impl<'a> BitAnd<Int2> for &'a Int2
[src]
type Output = Int2::Output
The resulting type after applying the &
operator
fn bitand(self, rhs: Int2) -> Int2::Output
The method for the &
operator
impl<'a> BitAnd<&'a Int2> for Int2
[src]
type Output = Int2::Output
The resulting type after applying the &
operator
fn bitand(self, rhs: &'a Int2) -> Int2::Output
The method for the &
operator
impl<'a, 'b> BitAnd<&'a Int2> for &'b Int2
[src]
type Output = Int2::Output
The resulting type after applying the &
operator
fn bitand(self, rhs: &'a Int2) -> Int2::Output
The method for the &
operator
impl BitAndAssign for Int2
[src]
fn bitand_assign(&mut self, rhs: Int2)
The method for the &=
operator
impl Neg for Int2
[src]
type Output = Int2
The resulting type after applying the -
operator
fn neg(self) -> Int2
The method for the unary -
operator
impl Shl<usize> for Int2
[src]
type Output = Int2
The resulting type after applying the <<
operator
fn shl(self, rhs: usize) -> Int2
The method for the <<
operator
impl ShlAssign<usize> for Int2
[src]
fn shl_assign(&mut self, rhs: usize)
The method for the <<=
operator
impl Shr<usize> for Int2
[src]
type Output = Int2
The resulting type after applying the >>
operator
fn shr(self, rhs: usize) -> Int2
The method for the >>
operator
impl ShrAssign<usize> for Int2
[src]
fn shr_assign(&mut self, rhs: usize)
The method for the >>=
operator