pub struct RollingHash { /* private fields */ }
Expand description

Rolling Hash です。O(文字列長) の前計算をしたうえで、部分文字列のハッシュ値を O(1) で計算します。

実装の参考資料

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impl RollingHash

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pub fn new(xs: &[u64]) -> Self

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pub fn len(&self) -> usize

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pub fn is_empty(&self) -> bool

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pub fn at(&self, i: usize) -> u64

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pub fn hash(&self, range: Range<usize>) -> u64

部分文字列のハッシュ値を返します。

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pub fn is_substring(&self, other: &Self) -> bool

self が other の部分文字列かどうかを返します。

O(other.len())

Examples
use rolling_hash::RollingHash;
let rh1 = RollingHash::from_iter("abcd".bytes());
let rh2 = RollingHash::from_iter("xxabcdyy".bytes());
assert!(rh1.is_substring(&rh2));

Trait Implementations§

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impl Clone for RollingHash

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fn clone(&self) -> RollingHash

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for RollingHash

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

Formats the value using the given formatter. Read more
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impl<T> FromIterator<T> for RollingHashwhere T: Into<u64>,

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

Creates a value from an iterator. Read more

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.