Trait orml_utilities::iterator::IterableStorageMapExtended[−][src]

pub trait IterableStorageMapExtended<K: FullEncode, V: FullCodec>: StorageMap<K, V> {
    type Iterator: Iterator<Item = (K, V)>;
    fn iter(
        max_iterations: Option<u32>, 
        start_key: Option<Vec<u8>>
    ) -> Self::Iterator;

    fn drain(
        max_iterations: Option<u32>, 
        start_key: Option<Vec<u8>>
    ) -> Self::Iterator;
}

A strongly-typed map in storage whose keys and values can be iterated over.

Associated Types

type Iterator: Iterator<Item = (K, V)>[src]

The type that iterates over all (key, value).

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Required methods

fn iter(
    max_iterations: Option<u32>,
    start_key: Option<Vec<u8>>
) -> Self::Iterator[src]

Enumerate all elements in the map in no particular order. If you alter the map while doing this, you'll get undefined results.

fn drain(
    max_iterations: Option<u32>,
    start_key: Option<Vec<u8>>
) -> Self::Iterator[src]

Remove all elements from the map and iterate through them in no particular order. If you add elements to the map while doing this, you'll get undefined results.

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Implementors

impl<K: FullCodec, V: FullCodec, G: StorageMapT<K, V>> IterableStorageMapExtended<K, V> for G where
    G::Hasher: ReversibleStorageHasher, [src]

type Iterator = StorageMapIteratorShim<K, V, G::Hasher>

fn iter(
    max_iterations: Option<u32>,
    start_key: Option<Vec<u8>>
) -> Self::Iterator[src]

Enumerate all elements in the map.

fn drain(
    max_iterations: Option<u32>,
    start_key: Option<Vec<u8>>
) -> Self::Iterator[src]

Enumerate all elements in the map.

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