Struct near_sdk::collections::UnorderedSet

pub struct UnorderedSet<T> { /* fields omitted */ }

An iterable implementation of a set that stores its content directly on the trie.

Implementations

impl<T> UnorderedSet<T>

pub fn len(&self) -> u64

Returns the number of elements in the set, also referred to as its size.

pub fn is_empty(&self) -> bool

Returns true if the set contains no elements.

pub fn new(id: Vec<u8>) -> Self

Create new map with zero elements. Use id as a unique identifier.

pub fn insert_raw(&mut self, element_raw: &[u8]) -> bool

Adds a value to the set. If the set did not have this value present, true is returned. If the set did have this value present, false is returned.

pub fn remove_raw(&mut self, element_raw: &[u8]) -> bool

Removes a value from the set. Returns whether the value was present in the set.

impl<T> UnorderedSet<T> where
    T: BorshSerialize + BorshDeserialize, 

pub fn contains(&self, element: &T) -> bool

Returns true if the set contains an element.

pub fn remove(&mut self, element: &T) -> bool

Removes a value from the set. Returns whether the value was present in the set.

pub fn insert(&mut self, element: &T) -> bool

Adds a value to the set. If the set did not have this value present, true is returned. If the set did have this value present, false is returned.

pub fn clear(&mut self)

Clears the map, removing all elements.

pub fn to_vec(&self) -> Vec<T>

Copies elements into an std::vec::Vec.

pub fn iter<'a>(&'a self) -> impl Iterator<Item = T> + 'a

Iterate over deserialized elements.

pub fn extend<IT: IntoIterator<Item = T>>(&mut self, iter: IT)

pub fn as_vector(&self) -> &Vector<T>

Returns a view of elements as a vector. It's sometimes useful to have random access to the elements.

Trait Implementations

impl<T> BorshDeserialize for UnorderedSet<T> where
    Vec<u8>: BorshDeserialize,
    Vector<T>: BorshDeserialize, 

fn deserialize(buf: &mut &[u8]) -> Result<Self, Error>

Deserializes this instance from a given slice of bytes. Updates the buffer to point at the remaining bytes.

fn try_from_slice(v: &[u8]) -> Result<Self, Error>

Deserialize this instance from a slice of bytes.

fn is_u8() -> bool

Whether Self is u8. NOTE: Vec<u8> is the most common use-case for serialization and deserialization, it's worth handling it as a special case to improve performance. It's a workaround for specific Vec<u8> implementation versus generic Vec<T> implementation. See https://github.com/rust-lang/rfcs/pull/1210 for details.

impl<T> BorshSerialize for UnorderedSet<T> where
    Vec<u8>: BorshSerialize,
    Vector<T>: BorshSerialize, 

fn serialize<W: Write>(&self, writer: &mut W) -> Result<(), Error>

fn try_to_vec(&self) -> Result<Vec<u8>, Error>

Serialize this instance into a vector of bytes.

fn is_u8() -> bool

Whether Self is u8. NOTE: Vec<u8> is the most common use-case for serialization and deserialization, it's worth handling it as a special case to improve performance. It's a workaround for specific Vec<u8> implementation versus generic Vec<T> implementation. See https://github.com/rust-lang/rfcs/pull/1210 for details.

impl<T> Default for UnorderedSet<T>

fn default() -> Self

Returns the "default value" for a type.