Trait orml_utilities::iterator::IterableStorageMapExtended

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;
}

👎Deprecated since 0.4.1: iterator module’s functionality is now available in substrate’s frame-support

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

Required Associated Types

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

👎Deprecated since 0.4.1: iterator module’s functionality is now available in substrate’s frame-support

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

Required Methods

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

👎Deprecated since 0.4.1: iterator module’s functionality is now available in substrate’s frame-support

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

👎Deprecated since 0.4.1: iterator module’s functionality is now available in substrate’s frame-support

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.

Implementors

impl<K: FullCodec, V: FullCodec, G: StorageMapT<K, V>> IterableStorageMapExtended<K, V> for Gwhere
    G::Hasher: ReversibleStorageHasher,

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