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

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

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

# Examples

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.extend([1, 2, 3].iter().cloned()); for x in &vec { 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.extend([1, 2, 3].iter().cloned());

    for x in &vec {
        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]);

It can also initialize each element of a `Vec<T>` with a given value:

fn main() { let vec = vec![0; 5]; assert_eq!(vec, [0, 0, 0, 0, 0]); }

    let vec = vec![0; 5];
    assert_eq!(vec, [0, 0, 0, 0, 0]);

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.

# Guarantees

Due to its incredibly fundamental nature, Vec makes a lot of guarantees about its design. This ensures that it's as low-overhead as possible in the general case, and can be correctly manipulated in primitive ways by unsafe code. Note that these guarantees refer to an unqualified `Vec<T>`. If additional type parameters are added (e.g. to support custom allocators), overriding their defaults may change the behavior.

Most fundamentally, Vec is and always will be a (pointer, capacity, length) triplet. No more, no less. The order of these fields is completely unspecified, and you should use the appropriate methods to modify these. The pointer will never be null, so this type is null-pointer-optimized.

However, the pointer may not actually point to allocated memory. In particular, if you construct a Vec with capacity 0 via `Vec::new()`, `vec![]`, `Vec::with_capacity(0)`, or by calling `shrink_to_fit()` on an empty Vec, it will not allocate memory. Similarly, if you store zero-sized types inside a Vec, it will not allocate space for them. Note that in this case the Vec may not report a `capacity()` of 0. Vec will allocate if and only if `mem::size_of::<T>() * capacity() > 0`. In general, Vec's allocation details are subtle enough that it is strongly recommended that you only free memory allocated by a Vec by creating a new Vec and dropping it.

If a Vec has allocated memory, then the memory it points to is on the heap (as defined by the allocator Rust is configured to use by default), and its pointer points to `len()` initialized elements in order (what you would see if you coerced it to a slice), followed by `capacity() - len()` logically uninitialized elements.

Vec will never perform a "small optimization" where elements are actually stored on the stack for two reasons:

- It would make it more difficult for unsafe code to correctly manipulate a Vec. The contents of a Vec wouldn't have a stable address if it were only moved, and it would be more difficult to determine if a Vec had actually allocated memory.

- It would penalize the general case, incurring an additional branch on every access.

Vec will never automatically shrink itself, even if completely empty. This ensures no unnecessary allocations or deallocations occur. Emptying a Vec and then filling it back up to the same `len()` should incur no calls to the allocator. If you wish to free up unused memory, use `shrink_to_fit`.

`push` and `insert` will never (re)allocate if the reported capacity is sufficient. `push` and `insert` will (re)allocate if `len() == capacity()`. That is, the reported capacity is completely accurate, and can be relied on. It can even be used to manually free the memory allocated by a Vec if desired. Bulk insertion methods may reallocate, even when not necessary.

Vec does not guarantee any particular growth strategy when reallocating when full, nor when `reserve` is called. The current strategy is basic and it may prove desirable to use a non-constant growth factor. Whatever strategy is used will of course guarantee `O(1)` amortized `push`.

`vec![x; n]`, `vec![a, b, c, d]`, and `Vec::with_capacity(n)`, will all produce a Vec with exactly the requested capacity. If `len() == capacity()`, (as is the case for the `vec!` macro), then a `Vec<T>` can be converted to and from a `Box<[T]>` without reallocating or moving the elements.

Vec will not specifically overwrite any data that is removed from it, but also won't specifically preserve it. Its uninitialized memory is scratch space that it may use however it wants. It will generally just do whatever is most efficient or otherwise easy to implement. Do not rely on removed data to be erased for security purposes. Even if you drop a Vec, its buffer may simply be reused by another Vec. Even if you zero a Vec's memory first, that may not actually happen because the optimizer does not consider this a side-effect that must be preserved.

Vec does not currently guarantee the order in which elements are dropped (the order has changed in the past, and may change again).

## 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() { #![allow(unused_mut)] 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.

# Safety

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

- `ptr` needs to have been previously allocated via `String`/`Vec<T>` (at least, it's highly likely to be incorrect if it wasn't).
- `length` needs to be the length that less than or equal to `capacity`.
- `capacity` needs to be the capacity that the pointer was allocated with.

Violating these may cause problems like corrupting the allocator's internal datastructures.

# 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]);
        }
    }

#### `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

fn main() { let mut vec = Vec::with_capacity(10); vec.extend([1, 2, 3].iter().cloned()); assert_eq!(vec.capacity(), 10); vec.shrink_to_fit(); assert!(vec.capacity() >= 3); }

    let mut vec = Vec::with_capacity(10);
    vec.extend([1, 2, 3].iter().cloned());
    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 to be `len` elements long, dropping excess elements.

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

# Examples

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

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

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

Extracts a slice containing the entire vector.

Equivalent to `&s[..]`.

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

Extracts a mutable slice of the entire vector.

Equivalent to `&mut s[..]`.

#### `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

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)`

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

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>`

Create a draining iterator that removes the specified range in the vector and yields the removed items.

Note 1: The element range is removed even if the iterator is not consumed until the end.

Note 2: 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

fn main() { let mut v = vec![1, 2, 3]; let u: Vec<_> = v.drain(1..).collect(); assert_eq!(v, &[1]); assert_eq!(u, &[2, 3]); // A full range clears the vector v.drain(..); assert_eq!(v, &[]); }

    let mut v = vec![1, 2, 3];
    let u: Vec<_> = v.drain(1..).collect();
    assert_eq!(v, &[1]);
    assert_eq!(u, &[2, 3]);

    // A full range clears the vector
    v.drain(..);
    assert_eq!(v, &[]);

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

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

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)`

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

If `new_len` is greater than `len()`, the `Vec` is extended by the difference, with each additional slot filled with `value`. If `new_len` is less than `len()`, the `Vec` is simply truncated.

# Examples

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])`

Deprecated since 1.6.0

: renamed to extend_from_slice

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

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.

Note that this function is same as `extend` except that it is specialized to work with slices instead. If and when Rust gets specialization this function will likely be deprecated (but still available).

# Examples

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

    let mut vec = vec![1];
    vec.extend_from_slice(&[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]);

## Trait Implementations

### `impl<T> From<BinaryHeap<T>> for Vec<T>`

#### `fn from(heap: BinaryHeap<T>) -> Vec<T>`

### `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: 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, T: 'a + Copy> Extend<&'a T> for Vec<T>`

#### `fn extend<I: IntoIterator<Item=&'a T>>(&mut self, iter: 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> AsMut<Vec<T>> for Vec<T>`

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

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

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

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

#### `fn as_mut(&mut self) -> &mut [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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