# Struct collections::vec::Vec [−] [src]

    pub struct Vec<T> {
        // some fields omitted
    }

A growable list type, written `Vec<T>` but pronounced 'vector.'

# Examples

#![feature(collections)] extern crate collections; fn main() { let mut vec = Vec::new(); vec.push(1); vec.push(2); assert_eq!(vec.len(), 2); assert_eq!(vec[0], 1); assert_eq!(vec.pop(), Some(2)); assert_eq!(vec.len(), 1); vec[0] = 7; assert_eq!(vec[0], 7); vec.push_all(&[1, 2, 3]); for x in vec.iter() { println!("{}", x); } assert_eq!(vec, [7, 1, 2, 3]); }

    let mut vec = Vec::new();
    vec.push(1);
    vec.push(2);

    assert_eq!(vec.len(), 2);
    assert_eq!(vec[0], 1);

    assert_eq!(vec.pop(), Some(2));
    assert_eq!(vec.len(), 1);

    vec[0] = 7;
    assert_eq!(vec[0], 7);

    vec.push_all(&[1, 2, 3]);

    for x in vec.iter() {
        println!("{}", x);
    }
    assert_eq!(vec, [7, 1, 2, 3]);

The `vec!` macro is provided to make initialization more convenient:

fn main() { let mut vec = vec![1, 2, 3]; vec.push(4); assert_eq!(vec, [1, 2, 3, 4]); }

    let mut vec = vec![1, 2, 3];
    vec.push(4);
    assert_eq!(vec, [1, 2, 3, 4]);

Use a `Vec<T>` as an efficient stack:

fn main() { let mut stack = Vec::new(); stack.push(1); stack.push(2); stack.push(3); while let Some(top) = stack.pop() { // Prints 3, 2, 1 println!("{}", top); } }

    let mut stack = Vec::new();

    stack.push(1);
    stack.push(2);
    stack.push(3);

    while let Some(top) = stack.pop() {
        // Prints 3, 2, 1
        println!("{}", top);
    }

# Capacity and reallocation

The capacity of a vector is the amount of space allocated for any future elements that will be added onto the vector. This is not to be confused with the length of a vector, which specifies the number of actual elements within the vector. If a vector's length exceeds its capacity, its capacity will automatically be increased, but its elements will have to be reallocated.

For example, a vector with capacity 10 and length 0 would be an empty vector with space for 10 more elements. Pushing 10 or fewer elements onto the vector will not change its capacity or cause reallocation to occur. However, if the vector's length is increased to 11, it will have to reallocate, which can be slow. For this reason, it is recommended to use `Vec::with_capacity` whenever possible to specify how big the vector is expected to get.

## Methods

### `impl<T> Vec<T>`

#### `fn new() -> Vec<T>`

Constructs a new, empty `Vec<T>`.

The vector will not allocate until elements are pushed onto it.

# Examples

fn main() { let mut vec: Vec<i32> = Vec::new(); }

    let mut vec: Vec<i32> = Vec::new();

#### `fn with_capacity(capacity: usize) -> Vec<T>`

Constructs a new, empty `Vec<T>` with the specified capacity.

The vector will be able to hold exactly `capacity` elements without reallocating. If `capacity` is 0, the vector will not allocate.

It is important to note that this function does not specify the length of the returned vector, but only the capacity. (For an explanation of the difference between length and capacity, see the main `Vec<T>` docs above, 'Capacity and reallocation'.)

# Examples

fn main() { let mut vec = Vec::with_capacity(10); // The vector contains no items, even though it has capacity for more assert_eq!(vec.len(), 0); // These are all done without reallocating... for i in 0..10 { vec.push(i); } // ...but this may make the vector reallocate vec.push(11); }

    let mut vec = Vec::with_capacity(10);

    // The vector contains no items, even though it has capacity for more
    assert_eq!(vec.len(), 0);

    // These are all done without reallocating...
    for i in 0..10 {
        vec.push(i);
    }

    // ...but this may make the vector reallocate
    vec.push(11);

#### `unsafe fn from_raw_parts(ptr: *mut T, length: usize, capacity: usize) -> Vec<T>`

Creates a `Vec<T>` directly from the raw components of another vector.

This is highly unsafe, due to the number of invariants that aren't checked.

# Examples

use std::ptr; use std::mem; fn main() { let mut v = vec![1, 2, 3]; // Pull out the various important pieces of information about `v` let p = v.as_mut_ptr(); let len = v.len(); let cap = v.capacity(); unsafe { // Cast `v` into the void: no destructor run, so we are in // complete control of the allocation to which `p` points. mem::forget(v); // Overwrite memory with 4, 5, 6 for i in 0..len as isize { ptr::write(p.offset(i), 4 + i); } // Put everything back together into a Vec let rebuilt = Vec::from_raw_parts(p, len, cap); assert_eq!(rebuilt, [4, 5, 6]); } }

    use std::ptr;
    use std::mem;

    fn main() {
        let mut v = vec![1, 2, 3];

        // Pull out the various important pieces of information about `v`
        let p = v.as_mut_ptr();
        let len = v.len();
        let cap = v.capacity();

        unsafe {
            // Cast `v` into the void: no destructor run, so we are in
            // complete control of the allocation to which `p` points.
            mem::forget(v);

            // Overwrite memory with 4, 5, 6
            for i in 0..len as isize {
                ptr::write(p.offset(i), 4 + i);
            }

            // Put everything back together into a Vec
            let rebuilt = Vec::from_raw_parts(p, len, cap);
            assert_eq!(rebuilt, [4, 5, 6]);
        }
    }

#### `unsafe fn from_raw_buf(ptr: *const T, elts: usize) -> Vec<T>`

Unstable

: may be better expressed via composition

Creates a vector by copying the elements from a raw pointer.

This function will copy `elts` contiguous elements starting at `ptr` into a new allocation owned by the returned `Vec<T>`. The elements of the buffer are copied into the vector without cloning, as if `ptr::read()` were called on them.

#### `fn capacity(&self) -> usize`

Returns the number of elements the vector can hold without reallocating.

# Examples

fn main() { let vec: Vec<i32> = Vec::with_capacity(10); assert_eq!(vec.capacity(), 10); }

    let vec: Vec<i32> = Vec::with_capacity(10);
    assert_eq!(vec.capacity(), 10);

#### `fn reserve(&mut self, additional: usize)`

Reserves capacity for at least `additional` more elements to be inserted in the given `Vec<T>`. The collection may reserve more space to avoid frequent reallocations.

# Panics

Panics if the new capacity overflows `usize`.

# Examples

fn main() { let mut vec = vec![1]; vec.reserve(10); assert!(vec.capacity() >= 11); }

    let mut vec = vec![1];
    vec.reserve(10);
    assert!(vec.capacity() >= 11);

#### `fn reserve_exact(&mut self, additional: usize)`

Reserves the minimum capacity for exactly `additional` more elements to be inserted in the given `Vec<T>`. Does nothing if the capacity is already sufficient.

Note that the allocator may give the collection more space than it requests. Therefore capacity can not be relied upon to be precisely minimal. Prefer `reserve` if future insertions are expected.

# Panics

Panics if the new capacity overflows `usize`.

# Examples

fn main() { let mut vec = vec![1]; vec.reserve_exact(10); assert!(vec.capacity() >= 11); }

    let mut vec = vec![1];
    vec.reserve_exact(10);
    assert!(vec.capacity() >= 11);

#### `fn shrink_to_fit(&mut self)`

Shrinks the capacity of the vector as much as possible.

It will drop down as close as possible to the length but the allocator may still inform the vector that there is space for a few more elements.

# Examples

#![feature(collections)] extern crate collections; fn main() { let mut vec = Vec::with_capacity(10); vec.push_all(&[1, 2, 3]); assert_eq!(vec.capacity(), 10); vec.shrink_to_fit(); assert!(vec.capacity() >= 3); }

    let mut vec = Vec::with_capacity(10);
    vec.push_all(&[1, 2, 3]);
    assert_eq!(vec.capacity(), 10);
    vec.shrink_to_fit();
    assert!(vec.capacity() >= 3);

#### `fn into_boxed_slice(self) -> Box<[T]>`

Converts the vector into Box<[T]>.

Note that this will drop any excess capacity. Calling this and converting back to a vector with `into_vec()` is equivalent to calling `shrink_to_fit()`.

#### `fn truncate(&mut self, len: usize)`

Shorten a vector, dropping excess elements.

If `len` is greater than the vector's current length, this has no effect.

# Examples

#![feature(collections)] extern crate collections; fn main() { let mut vec = vec![1, 2, 3, 4]; vec.truncate(2); assert_eq!(vec, [1, 2]); }

    let mut vec = vec![1, 2, 3, 4];
    vec.truncate(2);
    assert_eq!(vec, [1, 2]);

#### `fn as_slice(&self) -> &[T]`

Unstable

: waiting on RFC revision

Extracts a slice containing the entire vector.

#### `fn as_mut_slice(&mut self) -> &mut [T]`

Unstable

: waiting on RFC revision

Deprecated: use `&mut s[..]` instead.

#### `unsafe fn set_len(&mut self, len: usize)`

Sets the length of a vector.

This will explicitly set the size of the vector, without actually modifying its buffers, so it is up to the caller to ensure that the vector is actually the specified size.

# Examples

fn main() { let mut v = vec![1, 2, 3, 4]; unsafe { v.set_len(1); } }

    let mut v = vec![1, 2, 3, 4];
    unsafe {
        v.set_len(1);
    }

#### `fn swap_remove(&mut self, index: usize) -> T`

Removes an element from anywhere in the vector and return it, replacing it with the last element.

This does not preserve ordering, but is O(1).

# Panics

Panics if `index` is out of bounds.

# Examples

fn main() { let mut v = vec!["foo", "bar", "baz", "qux"]; assert_eq!(v.swap_remove(1), "bar"); assert_eq!(v, ["foo", "qux", "baz"]); assert_eq!(v.swap_remove(0), "foo"); assert_eq!(v, ["baz", "qux"]); }

    let mut v = vec!["foo", "bar", "baz", "qux"];

    assert_eq!(v.swap_remove(1), "bar");
    assert_eq!(v, ["foo", "qux", "baz"]);

    assert_eq!(v.swap_remove(0), "foo");
    assert_eq!(v, ["baz", "qux"]);

#### `fn insert(&mut self, index: usize, element: T)`

Inserts an element at position `index` within the vector, shifting all elements after position `i` one position to the right.

# Panics

Panics if `index` is greater than the vector's length.

# Examples

fn main() { let mut vec = vec![1, 2, 3]; vec.insert(1, 4); assert_eq!(vec, [1, 4, 2, 3]); vec.insert(4, 5); assert_eq!(vec, [1, 4, 2, 3, 5]); }

    let mut vec = vec![1, 2, 3];
    vec.insert(1, 4);
    assert_eq!(vec, [1, 4, 2, 3]);
    vec.insert(4, 5);
    assert_eq!(vec, [1, 4, 2, 3, 5]);

#### `fn remove(&mut self, index: usize) -> T`

Removes and returns the element at position `index` within the vector, shifting all elements after position `index` one position to the left.

# Panics

Panics if `index` is out of bounds.

# Examples

#![feature(collections)] extern crate collections; fn main() { let mut v = vec![1, 2, 3]; assert_eq!(v.remove(1), 2); assert_eq!(v, [1, 3]); }

    let mut v = vec![1, 2, 3];
    assert_eq!(v.remove(1), 2);
    assert_eq!(v, [1, 3]);

#### `fn retain<F>(&mut self, f: F) where F: FnMut(&T) -> bool`

Retains only the elements specified by the predicate.

In other words, remove all elements `e` such that `f(&e)` returns false. This method operates in place and preserves the order of the retained elements.

# Examples

fn main() { let mut vec = vec![1, 2, 3, 4]; vec.retain(|&x| x%2 == 0); assert_eq!(vec, [2, 4]); }

    let mut vec = vec![1, 2, 3, 4];
    vec.retain(|&x| x%2 == 0);
    assert_eq!(vec, [2, 4]);

#### `fn push(&mut self, value: T)`

Appends an element to the back of a collection.

# Panics

Panics if the number of elements in the vector overflows a `usize`.

# Examples

fn main() { let mut vec = vec!(1, 2); vec.push(3); assert_eq!(vec, [1, 2, 3]); }

    let mut vec = vec!(1, 2);
    vec.push(3);
    assert_eq!(vec, [1, 2, 3]);

#### `fn pop(&mut self) -> Option<T>`

Removes the last element from a vector and returns it, or `None` if it is empty.

# Examples

fn main() { let mut vec = vec![1, 2, 3]; assert_eq!(vec.pop(), Some(3)); assert_eq!(vec, [1, 2]); }

    let mut vec = vec![1, 2, 3];
    assert_eq!(vec.pop(), Some(3));
    assert_eq!(vec, [1, 2]);

#### `fn append(&mut self, other: &mut Self)`

Unstable

: new API, waiting for dust to settle

Moves all the elements of `other` into `Self`, leaving `other` empty.

# Panics

Panics if the number of elements in the vector overflows a `usize`.

# Examples

#![feature(collections)] extern crate collections; fn main() { let mut vec = vec![1, 2, 3]; let mut vec2 = vec![4, 5, 6]; vec.append(&mut vec2); assert_eq!(vec, [1, 2, 3, 4, 5, 6]); assert_eq!(vec2, []); }

    let mut vec = vec![1, 2, 3];
    let mut vec2 = vec![4, 5, 6];
    vec.append(&mut vec2);
    assert_eq!(vec, [1, 2, 3, 4, 5, 6]);
    assert_eq!(vec2, []);

#### `fn drain<R>(&mut self, range: R) -> Drain<T> where R: RangeArgument<usize>`

Unstable

: recently added, matches RFC

Create a draining iterator that removes the specified range in the vector and yields the removed items from start to end. The element range is removed even if the iterator is not consumed until the end.

Note: It is unspecified how many elements are removed from the vector, if the `Drain` value is leaked.

# Panics

Panics if the starting point is greater than the end point or if the end point is greater than the length of the vector.

# Examples

#![feature(collections_drain, collections_range)] extern crate collections; fn main() { // Draining using `..` clears the whole vector. let mut v = vec![1, 2, 3]; let u: Vec<_> = v.drain(..).collect(); assert_eq!(v, &[]); assert_eq!(u, &[1, 2, 3]); }

    // Draining using `..` clears the whole vector.
    let mut v = vec![1, 2, 3];
    let u: Vec<_> = v.drain(..).collect();
    assert_eq!(v, &[]);
    assert_eq!(u, &[1, 2, 3]);

#### `fn clear(&mut self)`

Clears the vector, removing all values.

# Examples

fn main() { let mut v = vec![1, 2, 3]; v.clear(); assert!(v.is_empty()); }

    let mut v = vec![1, 2, 3];

    v.clear();

    assert!(v.is_empty());

#### `fn len(&self) -> usize`

Returns the number of elements in the vector.

# Examples

fn main() { let a = vec![1, 2, 3]; assert_eq!(a.len(), 3); }

    let a = vec![1, 2, 3];
    assert_eq!(a.len(), 3);

#### `fn is_empty(&self) -> bool`

Returns `true` if the vector contains no elements.

# Examples

fn main() { let mut v = Vec::new(); assert!(v.is_empty()); v.push(1); assert!(!v.is_empty()); }

    let mut v = Vec::new();
    assert!(v.is_empty());

    v.push(1);
    assert!(!v.is_empty());

#### `fn map_in_place<U, F>(self, f: F) -> Vec<U> where F: FnMut(T) -> U`

Unstable

: API may change to provide stronger guarantees

Converts a `Vec<T>` to a `Vec<U>` where `T` and `U` have the same size and in case they are not zero-sized the same minimal alignment.

# Panics

Panics if `T` and `U` have differing sizes or are not zero-sized and have differing minimal alignments.

# Examples

#![feature(collections, core)] extern crate collections; fn main() { let v = vec![0, 1, 2]; let w = v.map_in_place(|i| i + 3); assert_eq!(&w[..], &[3, 4, 5]); #[derive(PartialEq, Debug)] struct Newtype(u8); let bytes = vec![0x11, 0x22]; let newtyped_bytes = bytes.map_in_place(|x| Newtype(x)); assert_eq!(&newtyped_bytes[..], &[Newtype(0x11), Newtype(0x22)]); }

    let v = vec![0, 1, 2];
    let w = v.map_in_place(|i| i + 3);
    assert_eq!(&w[..], &[3, 4, 5]);

    #[derive(PartialEq, Debug)]
    struct Newtype(u8);
    let bytes = vec![0x11, 0x22];
    let newtyped_bytes = bytes.map_in_place(|x| Newtype(x));
    assert_eq!(&newtyped_bytes[..], &[Newtype(0x11), Newtype(0x22)]);

#### `fn split_off(&mut self, at: usize) -> Self`

Unstable

: new API, waiting for dust to settle

Splits the collection into two at the given index.

Returns a newly allocated `Self`. `self` contains elements `[0, at)`, and the returned `Self` contains elements `[at, len)`.

Note that the capacity of `self` does not change.

# Panics

Panics if `at > len`.

# Examples

#![feature(collections)] extern crate collections; fn main() { let mut vec = vec![1,2,3]; let vec2 = vec.split_off(1); assert_eq!(vec, [1]); assert_eq!(vec2, [2, 3]); }

    let mut vec = vec![1,2,3];
    let vec2 = vec.split_off(1);
    assert_eq!(vec, [1]);
    assert_eq!(vec2, [2, 3]);

### `impl<T: Clone> Vec<T>`

#### `fn resize(&mut self, new_len: usize, value: T)`

Unstable

: matches collection reform specification; waiting for dust to settle

Resizes the `Vec` in-place so that `len()` is equal to `new_len`.

Calls either `extend()` or `truncate()` depending on whether `new_len` is larger than the current value of `len()` or not.

# Examples

#![feature(collections)] extern crate collections; fn main() { let mut vec = vec!["hello"]; vec.resize(3, "world"); assert_eq!(vec, ["hello", "world", "world"]); let mut vec = vec![1, 2, 3, 4]; vec.resize(2, 0); assert_eq!(vec, [1, 2]); }

    let mut vec = vec!["hello"];
    vec.resize(3, "world");
    assert_eq!(vec, ["hello", "world", "world"]);

    let mut vec = vec![1, 2, 3, 4];
    vec.resize(2, 0);
    assert_eq!(vec, [1, 2]);

#### `fn push_all(&mut self, other: &[T])`

Unstable

: likely to be replaced by a more optimized extend

Appends all elements in a slice to the `Vec`.

Iterates over the slice `other`, clones each element, and then appends it to this `Vec`. The `other` vector is traversed in-order.

# Examples

#![feature(collections)] extern crate collections; fn main() { let mut vec = vec![1]; vec.push_all(&[2, 3, 4]); assert_eq!(vec, [1, 2, 3, 4]); }

    let mut vec = vec![1];
    vec.push_all(&[2, 3, 4]);
    assert_eq!(vec, [1, 2, 3, 4]);

### `impl<T: PartialEq> Vec<T>`

#### `fn dedup(&mut self)`

Removes consecutive repeated elements in the vector.

If the vector is sorted, this removes all duplicates.

# Examples

fn main() { let mut vec = vec![1, 2, 2, 3, 2]; vec.dedup(); assert_eq!(vec, [1, 2, 3, 2]); }

    let mut vec = vec![1, 2, 2, 3, 2];

    vec.dedup();

    assert_eq!(vec, [1, 2, 3, 2]);

## Methods from Deref<Target=[T]>

#### `fn sort_by<F>(&mut self, compare: F) where F: FnMut(&T, &T) -> Ordering`

Sorts the slice, in place, using `compare` to compare elements.

This sort is `O(n log n)` worst-case and stable, but allocates approximately `2 * n`, where `n` is the length of `self`.

# Examples

fn main() { 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]); }

    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 move_from(&mut self, src: Vec<T>, start: usize, end: usize) -> usize`

Unstable

: uncertain about this API approach

Consumes `src` and moves as many elements as it can into `self` from the range [start,end).

Returns the number of elements copied (the shorter of `self.len()` and `end - start`).

# Arguments

- src - A mutable vector of `T`
- start - The index into `src` to start copying from
- end - The index into `src` to stop copying from

# Examples

#![feature(collections)] extern crate collections; fn main() { let mut a = [1, 2, 3, 4, 5]; let b = vec![6, 7, 8]; let num_moved = a.move_from(b, 0, 3); assert_eq!(num_moved, 3); assert!(a == [6, 7, 8, 4, 5]); }

    let mut a = [1, 2, 3, 4, 5];
    let b = vec![6, 7, 8];
    let num_moved = a.move_from(b, 0, 3);
    assert_eq!(num_moved, 3);
    assert!(a == [6, 7, 8, 4, 5]);

#### `fn split_at(&self, mid: usize) -> (&[T], &[T])`

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 if `mid > len`.

# Examples

fn main() { 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); }

    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 iter(&self) -> Iter<T>`

Returns an iterator over the slice.

#### `fn split<F>(&self, pred: F) -> Split<T, F> where 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

Print the slice split by numbers divisible by 3 (i.e. `[10, 40]`, `[20]`, `[50]`):

fn main() { let v = [10, 40, 30, 20, 60, 50]; for group in v.split(|num| *num % 3 == 0) { println!("{:?}", group); } }

    let v = [10, 40, 30, 20, 60, 50];
    for group in v.split(|num| *num % 3 == 0) {
        println!("{:?}", group);
    }

#### `fn splitn<F>(&self, n: usize, pred: F) -> SplitN<T, F> where 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]`):

fn main() { let v = [10, 40, 30, 20, 60, 50]; for group in v.splitn(2, |num| *num % 3 == 0) { println!("{:?}", group); } }

    let v = [10, 40, 30, 20, 60, 50];
    for group in v.splitn(2, |num| *num % 3 == 0) {
        println!("{:?}", group);
    }

#### `fn rsplitn<F>(&self, n: usize, pred: F) -> RSplitN<T, F> where 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]`):

fn main() { let v = [10, 40, 30, 20, 60, 50]; for group in v.rsplitn(2, |num| *num % 3 == 0) { println!("{:?}", group); } }

    let v = [10, 40, 30, 20, 60, 50];
    for group in v.rsplitn(2, |num| *num % 3 == 0) {
        println!("{:?}", group);
    }

#### `fn windows(&self, size: usize) -> Windows<T>`

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

Print the adjacent pairs of a slice (i.e. `[1,2]`, `[2,3]`, `[3,4]`):

fn main() { let v = &[1, 2, 3, 4]; for win in v.windows(2) { println!("{:?}", win); } }

    let v = &[1, 2, 3, 4];
    for win in v.windows(2) {
        println!("{:?}", win);
    }

#### `fn chunks(&self, size: usize) -> Chunks<T>`

Returns an iterator over `size` elements of the slice at a time. The chunks 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

Print the slice two elements at a time (i.e. `[1,2]`, `[3,4]`, `[5]`):

fn main() { let v = &[1, 2, 3, 4, 5]; for win in v.chunks(2) { println!("{:?}", win); } }

    let v = &[1, 2, 3, 4, 5];
    for win in v.chunks(2) {
        println!("{:?}", win);
    }

#### `fn get(&self, index: usize) -> Option<&T>`

Returns the element of a slice at the given index, or `None` if the index is out of bounds.

# Examples

fn main() { let v = [10, 40, 30]; assert_eq!(Some(&40), v.get(1)); assert_eq!(None, v.get(3)); }

    let v = [10, 40, 30];
    assert_eq!(Some(&40), v.get(1));
    assert_eq!(None, v.get(3));

#### `fn first(&self) -> Option<&T>`

Returns the first element of a slice, or `None` if it is empty.

# Examples

fn main() { let v = [10, 40, 30]; assert_eq!(Some(&10), v.first()); let w: &[i32] = &[]; assert_eq!(None, w.first()); }

    let v = [10, 40, 30];
    assert_eq!(Some(&10), v.first());

    let w: &[i32] = &[];
    assert_eq!(None, w.first());

#### `fn tail(&self) -> &[T]`

Unstable

: likely to be renamed

Returns all but the first element of a slice.

#### `fn init(&self) -> &[T]`

Unstable

: likely to be renamed

Returns all but the last element of a slice.

#### `fn last(&self) -> Option<&T>`

Returns the last element of a slice, or `None` if it is empty.

# Examples

fn main() { let v = [10, 40, 30]; assert_eq!(Some(&30), v.last()); let w: &[i32] = &[]; assert_eq!(None, w.last()); }

    let v = [10, 40, 30];
    assert_eq!(Some(&30), v.last());

    let w: &[i32] = &[];
    assert_eq!(None, w.last());

#### `unsafe fn get_unchecked(&self, index: usize) -> &T`

Returns a pointer to the element at the given index, without doing bounds checking.

#### `fn as_ptr(&self) -> *const T`

Returns an unsafe 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 slice may cause its buffer to be reallocated, which would also make any pointers to it invalid.

#### `fn binary_search_by<F>(&self, f: F) -> Result<usize, usize> where F: FnMut(&T) -> Ordering`

Binary search a 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]`.

#![feature(core)] fn main() { 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, }); }

    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 len(&self) -> usize`

Returns the number of elements in the slice.

# Example

fn main() { let a = [1, 2, 3]; assert_eq!(a.len(), 3); }

    let a = [1, 2, 3];
    assert_eq!(a.len(), 3);

#### `fn is_empty(&self) -> bool`

Returns true if the slice has a length of 0

# Example

fn main() { let a = [1, 2, 3]; assert!(!a.is_empty()); }

    let a = [1, 2, 3];
    assert!(!a.is_empty());

#### `fn get_mut(&mut self, index: usize) -> Option<&mut T>`

Returns a mutable reference to the element at the given index, or `None` if the index is out of bounds

#### `fn iter_mut(&mut self) -> IterMut<T>`

Returns an iterator that allows modifying each value

#### `fn first_mut(&mut self) -> Option<&mut T>`

Returns a mutable pointer to the first element of a slice, or `None` if it is empty

#### `fn tail_mut(&mut self) -> &mut [T]`

Unstable

: likely to be renamed or removed

Returns all but the first element of a mutable slice

#### `fn init_mut(&mut self) -> &mut [T]`

Unstable

: likely to be renamed or removed

Returns all but the last element of a mutable slice

#### `fn last_mut(&mut self) -> Option<&mut T>`

Returns a mutable pointer to the last item in the slice.

#### `fn split_mut<F>(&mut self, pred: F) -> SplitMut<T, F> where 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.

#### `fn splitn_mut<F>(&mut self, n: usize, pred: F) -> SplitNMut<T, F> where 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.

#### `fn rsplitn_mut<F>(&mut self, n: usize, pred: F) -> RSplitNMut<T, F> where 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.

#### `fn chunks_mut(&mut self, chunk_size: usize) -> ChunksMut<T>`

Returns an iterator over `chunk_size` elements of the slice at a time. The chunks are mutable 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.

#### `fn swap(&mut self, a: usize, b: usize)`

Swaps two elements in a 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.

# Example

fn main() { let mut v = ["a", "b", "c", "d"]; v.swap(1, 3); assert!(v == ["a", "d", "c", "b"]); }

    let mut v = ["a", "b", "c", "d"];
    v.swap(1, 3);
    assert!(v == ["a", "d", "c", "b"]);

#### `fn split_at_mut(&mut self, mid: usize) -> (&mut [T], &mut [T])`

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`.

# Example

fn main() { 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 == []); } }

    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 reverse(&mut self)`

Reverse the order of elements in a slice, in place.

# Example

fn main() { let mut v = [1, 2, 3]; v.reverse(); assert!(v == [3, 2, 1]); }

    let mut v = [1, 2, 3];
    v.reverse();
    assert!(v == [3, 2, 1]);

#### `unsafe fn get_unchecked_mut(&mut self, index: usize) -> &mut T`

Returns an unsafe mutable pointer to the element in index

#### `fn as_mut_ptr(&mut self) -> *mut T`

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 slice may cause its buffer to be reallocated, which would also make any pointers to it invalid.

#### `fn to_vec(&self) -> Vec<T> where T: Clone`

Copies `self` into a new `Vec`.

#### `fn permutations(&self) -> Permutations<T> where T: Clone`

Unstable

Creates an iterator that yields every possible permutation of the vector in succession.

# Examples

#![feature(collections)] extern crate collections; fn main() { let v = [1, 2, 3]; let mut perms = v.permutations(); for p in perms { println!("{:?}", p); } }

    let v = [1, 2, 3];
    let mut perms = v.permutations();

    for p in perms {
      println!("{:?}", p);
    }

Iterating through permutations one by one.

#![feature(collections)] extern crate collections; fn main() { let v = [1, 2, 3]; let mut perms = v.permutations(); assert_eq!(Some(vec![1, 2, 3]), perms.next()); assert_eq!(Some(vec![1, 3, 2]), perms.next()); assert_eq!(Some(vec![3, 1, 2]), perms.next()); }

    let v = [1, 2, 3];
    let mut perms = v.permutations();

    assert_eq!(Some(vec![1, 2, 3]), perms.next());
    assert_eq!(Some(vec![1, 3, 2]), perms.next());
    assert_eq!(Some(vec![3, 1, 2]), perms.next());

#### `fn clone_from_slice(&mut self, src: &[T]) -> usize where T: Clone`

Unstable

Copies as many elements from `src` as it can into `self` (the shorter of `self.len()` and `src.len()`). Returns the number of elements copied.

# Example

#![feature(collections)] extern crate collections; fn main() { let mut dst = [0, 0, 0]; let src = [1, 2]; assert!(dst.clone_from_slice(&src) == 2); assert!(dst == [1, 2, 0]); let src2 = [3, 4, 5, 6]; assert!(dst.clone_from_slice(&src2) == 3); assert!(dst == [3, 4, 5]); }

    let mut dst = [0, 0, 0];
    let src = [1, 2];

    assert!(dst.clone_from_slice(&src) == 2);
    assert!(dst == [1, 2, 0]);

    let src2 = [3, 4, 5, 6];
    assert!(dst.clone_from_slice(&src2) == 3);
    assert!(dst == [3, 4, 5]);

#### `fn sort(&mut self) where T: Ord`

Sorts the slice, in place.

This is equivalent to `self.sort_by(|a, b| a.cmp(b))`.

# Examples

fn main() { let mut v = [-5, 4, 1, -3, 2]; v.sort(); assert!(v == [-5, -3, 1, 2, 4]); }

    let mut v = [-5, 4, 1, -3, 2];

    v.sort();
    assert!(v == [-5, -3, 1, 2, 4]);

#### `fn binary_search(&self, x: &T) -> Result<usize, usize> where T: Ord`

Binary search a 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]`.

#![feature(core)] fn main() { 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, }); }

    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 next_permutation(&mut self) -> bool where T: Ord`

Unstable

: uncertain if this merits inclusion in std

Mutates the slice to the next lexicographic permutation.

Returns `true` if successful and `false` if the slice is at the last-ordered permutation.

# Example

#![feature(collections)] extern crate collections; fn main() { let v: &mut [_] = &mut [0, 1, 2]; v.next_permutation(); let b: &mut [_] = &mut [0, 2, 1]; assert!(v == b); v.next_permutation(); let b: &mut [_] = &mut [1, 0, 2]; assert!(v == b); }

    let v: &mut [_] = &mut [0, 1, 2];
    v.next_permutation();
    let b: &mut [_] = &mut [0, 2, 1];
    assert!(v == b);
    v.next_permutation();
    let b: &mut [_] = &mut [1, 0, 2];
    assert!(v == b);

#### `fn prev_permutation(&mut self) -> bool where T: Ord`

Unstable

: uncertain if this merits inclusion in std

Mutates the slice to the previous lexicographic permutation.

Returns `true` if successful and `false` if the slice is at the first-ordered permutation.

# Example

#![feature(collections)] extern crate collections; fn main() { let v: &mut [_] = &mut [1, 0, 2]; v.prev_permutation(); let b: &mut [_] = &mut [0, 2, 1]; assert!(v == b); v.prev_permutation(); let b: &mut [_] = &mut [0, 1, 2]; assert!(v == b); }

    let v: &mut [_] = &mut [1, 0, 2];
    v.prev_permutation();
    let b: &mut [_] = &mut [0, 2, 1];
    assert!(v == b);
    v.prev_permutation();
    let b: &mut [_] = &mut [0, 1, 2];
    assert!(v == b);

#### `fn position_elem(&self, t: &T) -> Option<usize> where T: PartialEq`

Unstable

Find the first index containing a matching value.

#### `fn rposition_elem(&self, t: &T) -> Option<usize> where T: PartialEq`

Unstable

Find the last index containing a matching value.

#### `fn contains(&self, x: &T) -> bool where T: PartialEq`

Returns true if the slice contains an element with the given value.

# Examples

fn main() { let v = [10, 40, 30]; assert!(v.contains(&30)); assert!(!v.contains(&50)); }

    let v = [10, 40, 30];
    assert!(v.contains(&30));
    assert!(!v.contains(&50));

#### `fn starts_with(&self, needle: &[T]) -> bool where T: PartialEq`

Returns true if `needle` is a prefix of the slice.

# Examples

fn main() { 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])); }

    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]));

#### `fn ends_with(&self, needle: &[T]) -> bool where T: PartialEq`

Returns true if `needle` is a suffix of the slice.

# Examples

fn main() { 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])); }

    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]));

#### `fn into_vec(self: Box<Self>) -> Vec<T>`

Converts `self` into a vector without clones or allocation.

## Trait Implementations

### `impl<T> Borrow<[T]> for Vec<T>`

#### `fn borrow(&self) -> &[T]`

### `impl<T> BorrowMut<[T]> for Vec<T>`

#### `fn borrow_mut(&mut self) -> &mut [T]`

### `impl<T: Send> Send for Vec<T>`

### `impl<T: Sync> Sync for Vec<T>`

### `impl<T: Clone> Clone for Vec<T>`

#### `fn clone(&self) -> Vec<T>`

#### `fn clone_from(&mut self, other: &Vec<T>)`

### `impl<T: Hash> Hash for Vec<T>`

#### `fn hash<H: Hasher>(&self, state: &mut H)`

#### `fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher`

### `impl<T> Index<usize> for Vec<T>`

#### `type Output = T`

#### `fn index(&self, index: usize) -> &T`

### `impl<T> IndexMut<usize> for Vec<T>`

#### `fn index_mut(&mut self, index: usize) -> &mut T`

### `impl<T> Index<Range<usize>> for Vec<T>`

#### `type Output = [T]`

#### `fn index(&self, index: Range<usize>) -> &[T]`

### `impl<T> Index<RangeTo<usize>> for Vec<T>`

#### `type Output = [T]`

#### `fn index(&self, index: RangeTo<usize>) -> &[T]`

### `impl<T> Index<RangeFrom<usize>> for Vec<T>`

#### `type Output = [T]`

#### `fn index(&self, index: RangeFrom<usize>) -> &[T]`

### `impl<T> Index<RangeFull> for Vec<T>`

#### `type Output = [T]`

#### `fn index(&self, _index: RangeFull) -> &[T]`

### `impl<T> IndexMut<Range<usize>> for Vec<T>`

#### `fn index_mut(&mut self, index: Range<usize>) -> &mut [T]`

### `impl<T> IndexMut<RangeTo<usize>> for Vec<T>`

#### `fn index_mut(&mut self, index: RangeTo<usize>) -> &mut [T]`

### `impl<T> IndexMut<RangeFrom<usize>> for Vec<T>`

#### `fn index_mut(&mut self, index: RangeFrom<usize>) -> &mut [T]`

### `impl<T> IndexMut<RangeFull> for Vec<T>`

#### `fn index_mut(&mut self, _index: RangeFull) -> &mut [T]`

### `impl<T> Deref for Vec<T>`

#### `type Target = [T]`

#### `fn deref(&self) -> &[T]`

### `impl<T> DerefMut for Vec<T>`

#### `fn deref_mut(&mut self) -> &mut [T]`

### `impl<T> FromIterator<T> for Vec<T>`

#### `fn from_iter<I: IntoIterator<Item=T>>(iterable: I) -> Vec<T>`

### `impl<T> IntoIterator for Vec<T>`

#### `type Item = T`

#### `type IntoIter = IntoIter<T>`

#### `fn into_iter(self) -> IntoIter<T>`

### `impl<'a, T> IntoIterator for &'a Vec<T>`

#### `type Item = &'a T`

#### `type IntoIter = Iter<'a, T>`

#### `fn into_iter(self) -> Iter<'a, T>`

### `impl<'a, T> IntoIterator for &'a mut Vec<T>`

#### `type Item = &'a mut T`

#### `type IntoIter = IterMut<'a, T>`

#### `fn into_iter(self) -> IterMut<'a, T>`

### `impl<T> Extend<T> for Vec<T>`

#### `fn extend<I: IntoIterator<Item=T>>(&mut self, iterable: I)`

### `impl<'a, 'b, A: Sized, B> PartialEq<Vec<B>> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &Vec<B>) -> bool`

#### `fn ne(&self, other: &Vec<B>) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B]) -> bool`

#### `fn ne(&self, other: &&'b [B]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b mut [B]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b mut [B]) -> bool`

#### `fn ne(&self, other: &&'b mut [B]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 0]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 0]) -> bool`

#### `fn ne(&self, other: &[B; 0]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 0]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 0]) -> bool`

#### `fn ne(&self, other: &&'b [B; 0]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 1]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 1]) -> bool`

#### `fn ne(&self, other: &[B; 1]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 1]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 1]) -> bool`

#### `fn ne(&self, other: &&'b [B; 1]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 2]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 2]) -> bool`

#### `fn ne(&self, other: &[B; 2]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 2]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 2]) -> bool`

#### `fn ne(&self, other: &&'b [B; 2]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 3]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 3]) -> bool`

#### `fn ne(&self, other: &[B; 3]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 3]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 3]) -> bool`

#### `fn ne(&self, other: &&'b [B; 3]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 4]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 4]) -> bool`

#### `fn ne(&self, other: &[B; 4]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 4]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 4]) -> bool`

#### `fn ne(&self, other: &&'b [B; 4]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 5]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 5]) -> bool`

#### `fn ne(&self, other: &[B; 5]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 5]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 5]) -> bool`

#### `fn ne(&self, other: &&'b [B; 5]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 6]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 6]) -> bool`

#### `fn ne(&self, other: &[B; 6]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 6]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 6]) -> bool`

#### `fn ne(&self, other: &&'b [B; 6]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 7]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 7]) -> bool`

#### `fn ne(&self, other: &[B; 7]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 7]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 7]) -> bool`

#### `fn ne(&self, other: &&'b [B; 7]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 8]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 8]) -> bool`

#### `fn ne(&self, other: &[B; 8]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 8]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 8]) -> bool`

#### `fn ne(&self, other: &&'b [B; 8]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 9]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 9]) -> bool`

#### `fn ne(&self, other: &[B; 9]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 9]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 9]) -> bool`

#### `fn ne(&self, other: &&'b [B; 9]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 10]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 10]) -> bool`

#### `fn ne(&self, other: &[B; 10]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 10]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 10]) -> bool`

#### `fn ne(&self, other: &&'b [B; 10]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 11]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 11]) -> bool`

#### `fn ne(&self, other: &[B; 11]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 11]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 11]) -> bool`

#### `fn ne(&self, other: &&'b [B; 11]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 12]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 12]) -> bool`

#### `fn ne(&self, other: &[B; 12]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 12]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 12]) -> bool`

#### `fn ne(&self, other: &&'b [B; 12]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 13]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 13]) -> bool`

#### `fn ne(&self, other: &[B; 13]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 13]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 13]) -> bool`

#### `fn ne(&self, other: &&'b [B; 13]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 14]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 14]) -> bool`

#### `fn ne(&self, other: &[B; 14]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 14]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 14]) -> bool`

#### `fn ne(&self, other: &&'b [B; 14]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 15]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 15]) -> bool`

#### `fn ne(&self, other: &[B; 15]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 15]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 15]) -> bool`

#### `fn ne(&self, other: &&'b [B; 15]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 16]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 16]) -> bool`

#### `fn ne(&self, other: &[B; 16]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 16]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 16]) -> bool`

#### `fn ne(&self, other: &&'b [B; 16]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 17]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 17]) -> bool`

#### `fn ne(&self, other: &[B; 17]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 17]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 17]) -> bool`

#### `fn ne(&self, other: &&'b [B; 17]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 18]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 18]) -> bool`

#### `fn ne(&self, other: &[B; 18]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 18]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 18]) -> bool`

#### `fn ne(&self, other: &&'b [B; 18]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 19]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 19]) -> bool`

#### `fn ne(&self, other: &[B; 19]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 19]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 19]) -> bool`

#### `fn ne(&self, other: &&'b [B; 19]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 20]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 20]) -> bool`

#### `fn ne(&self, other: &[B; 20]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 20]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 20]) -> bool`

#### `fn ne(&self, other: &&'b [B; 20]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 21]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 21]) -> bool`

#### `fn ne(&self, other: &[B; 21]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 21]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 21]) -> bool`

#### `fn ne(&self, other: &&'b [B; 21]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 22]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 22]) -> bool`

#### `fn ne(&self, other: &[B; 22]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 22]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 22]) -> bool`

#### `fn ne(&self, other: &&'b [B; 22]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 23]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 23]) -> bool`

#### `fn ne(&self, other: &[B; 23]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 23]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 23]) -> bool`

#### `fn ne(&self, other: &&'b [B; 23]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 24]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 24]) -> bool`

#### `fn ne(&self, other: &[B; 24]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 24]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 24]) -> bool`

#### `fn ne(&self, other: &&'b [B; 24]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 25]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 25]) -> bool`

#### `fn ne(&self, other: &[B; 25]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 25]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 25]) -> bool`

#### `fn ne(&self, other: &&'b [B; 25]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 26]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 26]) -> bool`

#### `fn ne(&self, other: &[B; 26]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 26]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 26]) -> bool`

#### `fn ne(&self, other: &&'b [B; 26]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 27]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 27]) -> bool`

#### `fn ne(&self, other: &[B; 27]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 27]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 27]) -> bool`

#### `fn ne(&self, other: &&'b [B; 27]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 28]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 28]) -> bool`

#### `fn ne(&self, other: &[B; 28]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 28]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 28]) -> bool`

#### `fn ne(&self, other: &&'b [B; 28]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 29]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 29]) -> bool`

#### `fn ne(&self, other: &[B; 29]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 29]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 29]) -> bool`

#### `fn ne(&self, other: &&'b [B; 29]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 30]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 30]) -> bool`

#### `fn ne(&self, other: &[B; 30]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 30]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 30]) -> bool`

#### `fn ne(&self, other: &&'b [B; 30]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 31]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 31]) -> bool`

#### `fn ne(&self, other: &[B; 31]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 31]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 31]) -> bool`

#### `fn ne(&self, other: &&'b [B; 31]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<[B; 32]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &[B; 32]) -> bool`

#### `fn ne(&self, other: &[B; 32]) -> bool`

### `impl<'a, 'b, A: Sized, B> PartialEq<&'b [B; 32]> for Vec<A> where A: PartialEq<B>`

#### `fn eq(&self, other: &&'b [B; 32]) -> bool`

#### `fn ne(&self, other: &&'b [B; 32]) -> bool`

### `impl<T: PartialOrd> PartialOrd for Vec<T>`

#### `fn partial_cmp(&self, other: &Vec<T>) -> Option<Ordering>`

#### `fn lt(&self, other: &Rhs) -> bool`

#### `fn le(&self, other: &Rhs) -> bool`

#### `fn gt(&self, other: &Rhs) -> bool`

#### `fn ge(&self, other: &Rhs) -> bool`

### `impl<T: Eq> Eq for Vec<T>`

### `impl<T: Ord> Ord for Vec<T>`

#### `fn cmp(&self, other: &Vec<T>) -> Ordering`

### `impl<T> Drop for Vec<T>`

#### `fn drop(&mut self)`

### `impl<T> Default for Vec<T>`

#### `fn default() -> Vec<T>`

### `impl<T: Debug> Debug for Vec<T>`

#### `fn fmt(&self, f: &mut Formatter) -> Result`

### `impl<T> AsRef<Vec<T>> for Vec<T>`

#### `fn as_ref(&self) -> &Vec<T>`

### `impl<T> AsRef<[T]> for Vec<T>`

#### `fn as_ref(&self) -> &[T]`

### `impl<'a, T: Clone> From<&'a [T]> for Vec<T>`

#### `fn from(s: &'a [T]) -> Vec<T>`

### `impl<'a> From<&'a str> for Vec<u8>`

#### `fn from(s: &'a str) -> Vec<u8>`

### `impl<'a, T: 'a> IntoCow<'a, [T]> for Vec<T> where T: Clone`

#### `fn into_cow(self) -> Cow<'a, [T]>`

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