Module std::sliceStable
[-] [+]
[src]
Utilities for slice manipulation
The slice
module contains useful code to help work with slice values.
Slices are a view into a block of memory represented as a pointer and a length.
// slicing a Vec let vec = vec![1, 2, 3]; let int_slice = &vec[..]; // coercing an array to a slice let str_slice: &[&str] = &["one", "two", "three"];
Slices are either mutable or shared. The shared slice type is &[T]
,
while the mutable slice type is &mut [T]
, where T
represents the element
type. For example, you can mutate the block of memory that a mutable slice
points to:
let x = &mut [1, 2, 3]; x[1] = 7; assert_eq!(x, &[1, 7, 3]);
Here are some of the things this module contains:
Structs
There are several structs that are useful for slices, such as Iter
, which
represents iteration over a slice.
Trait Implementations
There are several implementations of common traits for slices. Some examples include:
Clone
Eq
,Ord
- for slices whose element type areEq
orOrd
.Hash
- for slices whose element type isHash
Iteration
The slices implement IntoIterator
. The iterator yields references to the
slice elements.
let numbers = &[0, 1, 2]; for n in numbers { println!("{} is a number!", n); }
The mutable slice yields mutable references to the elements:
fn main() { let mut scores = [7, 8, 9]; for score in &mut scores[..] { *score += 1; } }let mut scores = [7, 8, 9]; for score in &mut scores[..] { *score += 1; }
This iterator yields mutable references to the slice's elements, so while the element
type of the slice is i32
, the element type of the iterator is &mut i32
.
.iter()
and.iter_mut()
are the explicit methods to return the default iterators.- Further methods that return iterators are
.split()
,.splitn()
,.chunks()
,.windows()
and more.
Modules
bytes | Operations on |
Structs
Chunks | An iterator over a slice in (non-overlapping) chunks ( |
ChunksMut | An iterator over a slice in (non-overlapping) mutable chunks ( |
ElementSwaps | An iterator that yields the element swaps needed to produce a sequence of all possible permutations for an indexed sequence of elements. Each permutation is only a single swap apart. |
Iter | Immutable slice iterator |
IterMut | Mutable slice iterator. |
Permutations | An iterator that uses |
RSplitN | An iterator over subslices separated by elements that match a predicate function, limited to a given number of splits, starting from the end of the slice. |
RSplitNMut | An iterator over subslices separated by elements that match a predicate function, limited to a given number of splits, starting from the end of the slice. |
Split | An iterator over subslices separated by elements that match a predicate function. |
SplitMut | An iterator over the subslices of the vector which are separated
by elements that match |
SplitN | An iterator over subslices separated by elements that match a predicate function, limited to a given number of splits. |
SplitNMut | An iterator over subslices separated by elements that match a predicate function, limited to a given number of splits. |
Windows | An iterator over overlapping subslices of length |
Traits
IntSliceExt | Extension methods for slices containing integers. |
SliceConcatExt | An extension trait for concatenating slices |
Functions
from_raw_parts | Forms a slice from a pointer and a length. |
from_raw_parts_mut | Performs the same functionality as |
mut_ref_slice | Converts a pointer to A into a slice of length 1 (without copying). |
ref_slice | Converts a pointer to A into a slice of length 1 (without copying). |