interface MultiMapBase.Context<UK,UV,Tp>

The multimap's Context instance that serves as a factory for all related immutable instances and builders.

Extends: MultiMapBase.Factory<Tp,UK,UV>

Implemented by: MultiMapContext<UK,UV,N,Tp>

Type parameters

Name	Constraints	Default	Description
UK			undocumented
UV			undocumented
Tp	MultiMapBase.Types	MultiMapBase.Types	undocumented

Properties

keyMapContext

The context used for the internal keymap instances.

Definition

readonly keyMapContext: WithKeyValue<Tp, UK, UV>['keyMapContext'];

keyMapValuesContext

undocumented

Definition

readonly keyMapValuesContext: WithKeyValue<Tp, UK, UV>['keyMapValuesContext'];

typeTag

A string tag defining the specific collection type

Definition

readonly typeTag: string;

example

HashMultiMapHashValue.defaultContext().typeTag   // => 'HashMultiMapHashValue'

Methods

builder

Returns an empty builder instance for this type of collection and context.

Definition

builder<K extends UK, V extends UV>(): WithKeyValue<Tp, K, V>['builder'];

Type parameters

Name	Constraints	Description
K	UK
V	UV

example

HashMultiMapHashValue.builder<number, string>()    // => HashMultiMapHashValue.Builder<number, string>

Overrides

Factory.builder

empty

Returns the (singleton) empty instance of this type and context with given key and value types.

Definition

empty<K extends UK, V extends UV>(): WithKeyValue<Tp, K, V>['normal'];

Type parameters

Name	Constraints	Description
K	UK
V	UV

example

HashMultiMapHashValue.empty<number, string>()    // => HashMultiMapHashValue<number, string>
HashMultiMapHashValue.empty<string, boolean>()   // => HashMultiMapHashValue<string, boolean>

Overrides

Factory.empty

from

Returns an immutable multimap of this type and context, containing the entries in the given source StreamSource.

Definitions

from<K extends UK, V extends UV>(...sources: ArrayNonEmpty<StreamSource.NonEmpty<readonly [K, V]>>): WithKeyValue<Tp, K, V>['nonEmpty'];

from<K extends UK, V extends UV>(...sources: ArrayNonEmpty<StreamSource<readonly [K, V]>>): WithKeyValue<Tp, K, V>['normal'];

Type parameters

Name	Constraints	Description
K	UK
V	UV

Parameters

Name	Type	Description
sources	ArrayNonEmpty<StreamSource.NonEmpty<readonly [K, V]>>	an array of StreamSource instances containing key-value entries

example

HashMultiMapHashValue.from([[1, 'a'], [2, 'b']])    // => HashMultiMapHashValue.NonEmpty<number, string>

Overrides

Factory.from

of

Returns an immutable multimap of this collection type and context, containing the given entries.

Definition

of<K extends UK, V extends UV>(...entries: ArrayNonEmpty<readonly [K, V]>): WithKeyValue<Tp, K, V>['nonEmpty'];

Type parameters

Name	Constraints	Description
K	UK
V	UV

Parameters

Name	Type	Description
entries	ArrayNonEmpty<readonly [K, V]>	a non-empty array of key-value entries

example

HashMultiMapHashValue.of([1, 'a'], [2, 'b'], [1, 'c'])    // => HashMap.NonEmpty<number, string>

Overrides

Factory.of

reducer

Returns a Reducer that adds received tuples to a MultiMap and returns the MultiMap as a result. When a source is given, the reducer will first create a MultiMap from the source, and then add tuples to it.

Definition

reducer<K extends UK, V extends UV>(source?: StreamSource<readonly [K, V]>): Reducer<readonly [K, V], WithKeyValue<Tp, K, V>['normal']>;

Type parameters

Name	Constraints	Description
K	UK
V	UV

Parameters

Name	Type	Description
source	StreamSource<readonly [K, V]>	(optional) an initial source of tuples to add to

example

const someSource: [number, string][] = [1, 'a'], [2, 'b'];
const result = Stream.of([1, 'c'], [3, 'a']).reduce(SortedMultiMap.reducer(someSource))
result.toArray()   // => [[1, 'a'], [1, 'c'], [2, 'b'], [3, 'a']]

note

uses a builder under the hood. If the given source is a MultiMap in the same context, it will directly call .toBuilder().

Overrides

Factory.reducer