Struct immutable_chunkmap::set::Set

pub struct Set<K: Ord + Clone>(_);

This set uses a similar strategy to BTreeSet to ensure cache efficient performance on modern hardware while still providing log(N) get, insert, and remove operations.

Examples

use std::string::String;
use self::immutable_chunkmap::set::Set;

let m =
   Set::new()
   .insert(String::from("1")).0
   .insert(String::from("2")).0
   .insert(String::from("3")).0;

assert_eq!(m.contains("1"), true);
assert_eq!(m.contains("2"), true);
assert_eq!(m.contains("3"), true);
assert_eq!(m.contains("4"), false);

for k in &m { println!("{}", k) }

Methods

impl<K> Set<K> where     K: Ord + Clone,

pub fn new() -> Self

Create a new empty set

pub fn insert_many<E: IntoIterator<Item = K>>(&self, elts: E) -> Self

This will insert many elements at once, and is potentially a lot faster than inserting one by one, especially if the data is sorted.

#Examples

 use self::immutable_chunkmap::set::Set;

 let mut v = vec![1, 10, -12, 44, 50];
 v.sort_unstable();

 let m = Set::new().insert_many(v.iter().map(|k| *k));

 for k in &v {
   assert_eq!(m.contains(k), true)
 }

pub fn remove_many<Q, E>(&self, elts: E) -> Self where     Q: Ord,     K: Borrow<Q>,     E: IntoIterator<Item = Q>,

Remove multiple elements in a single pass. Similar performance to insert_many.

pub fn update_many<Q, E, F>(&self, elts: E, f: F) -> Self where     Q: Ord,     K: Borrow<Q>,     E: IntoIterator<Item = Q>,     F: FnMut(Q, Option<&K>) -> Option<K>,

This is just slightly wierd, however if you have a bunch of borrowed forms of members of the set, and you want to look at the real entries and possibly add/update/remove them, then this method is for you.

pub fn insert(&self, k: K) -> (Self, bool)

return a new set with k inserted into it. If k already exists in the old set return true, else false. If the element already exists in the set memory will not be allocated.

pub fn contains<'a, Q: ?Sized>(&'a self, k: &Q) -> bool where     Q: Ord,     K: Borrow<Q>,

return true if the set contains k, else false. Runs in log(N) time and constant space. where N is the size of the set.

pub fn get<'a, Q: ?Sized>(&'a self, k: &Q) -> Option<&K> where     Q: Ord,     K: Borrow<Q>,

return a reference to an item in the set if any that is equal to the given value.

pub fn remove<Q: Sized + Ord>(&self, k: &Q) -> (Self, bool) where     K: Borrow<Q>,

return a new set with k removed. Runs in log(N) time and log(N) space, where N is the size of the set

pub fn union(&self, other: &Set<K>) -> Self

return the union of 2 sets. Runs in O(log(N) + M) time, where N is the largest of the two sets, and M is the number of chunks that intersect, which is roughly proportional to the size of the intersection.

Examples

use std::iter::FromIterator;
use self::immutable_chunkmap::set::Set;

let s0 = Set::from_iter(0..10);
let s1 = Set::from_iter(5..15);
let s2 = s0.union(&s1);
for i in 0..15 {
    assert!(s2.contains(&i));
}

pub fn len(&self) -> usize

get the number of elements in the map O(1) time and space

Important traits for SetIter<'a, Q, K>

impl<'a, Q, K> Iterator for SetIter<'a, Q, K> where
    Q: Ord,
    K: 'a + Clone + Ord + Borrow<Q>,  type Item = &'a K;

pub fn range<'a, Q>(     &'a self,     lbound: Bound<Q>,     ubound: Bound<Q> ) -> SetIter<'a, Q, K> where     Q: Ord,     K: 'a + Clone + Ord + Borrow<Q>,

return an iterator over the subset of elements in the set that are within the specified range.

The returned iterator runs in O(log(N) + M) time, and constant space. N is the number of elements in the tree, and M is the number of elements you examine.

if lbound >= ubound the returned iterator will be empty

Trait Implementations

impl<K: Clone + Ord + Clone> Clone for Set<K>

fn clone(&self) -> Set<K>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<K> Hash for Set<K> where     K: Hash + Ord + Clone,

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

Feeds this value into the given [Hasher].

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

Feeds a slice of this type into the given [Hasher].

impl<K> Default for Set<K> where     K: Ord + Clone,

fn default() -> Set<K>

Returns the "default value" for a type.

impl<K> PartialEq for Set<K> where     K: Ord + Clone,

fn eq(&self, other: &Set<K>) -> bool

This method tests for self and other values to be equal, and is used by ==.

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl<K> Eq for Set<K> where     K: Eq + Ord + Clone,

impl<K> PartialOrd for Set<K> where     K: Ord + Clone,

fn partial_cmp(&self, other: &Set<K>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use] fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use] fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use] fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

#[must_use] fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl<K> Ord for Set<K> where     K: Ord + Clone,

fn cmp(&self, other: &Set<K>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl<K> Debug for Set<K> where     K: Debug + Ord + Clone,

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

Formats the value using the given formatter.

impl<K> FromIterator<K> for Set<K> where     K: Ord + Clone,

fn from_iter<T: IntoIterator<Item = K>>(iter: T) -> Self

Creates a value from an iterator.

impl<'a, K> IntoIterator for &'a Set<K> where     K: 'a + Borrow<K> + Ord + Clone,

type Item = &'a K

The type of the elements being iterated over.

type IntoIter = SetIter<'a, K, K>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.