interface SortedMap.NonEmpty<K,V>

A non-empty type-invariant immutable Map of key type K, and value type V. In the Map, each key has exactly one value, and the Map cannot contain duplicate keys. See the Map documentation and the SortedMap API documentation

Extends: Streamable.NonEmpty<T>, RMapBase.NonEmpty<K,V,Tp>, SortedMap<K,V>

Type parameters

Name	Description
K	the key type
V	the value type

note

• The SortedMap keeps the inserted keys in sorted order according to the context's comp instance.

example

const m1 = SortedMap.empty<number, string>()
const m2 = SortedMap.of([1, 'a'], [2, 'b'])

Properties

context

Returns the context associated to this collection instance.

Definition

readonly context: WithKeyValue<Tp, K, V>['context'];

Overrides

RMapBase.context

isEmpty

Returns false since this collection is known to be non-empty.

Definition

readonly isEmpty: false;

example

HashMap.of([1, 1], [2, 2]).isEmpty   // => false

Overrides

VariantMapBase.isEmptyNonEmpty.isEmpty

size

Returns the number of entries

Definition

readonly size: number;

example

HashMap.of([1, 1], [2, 2]).size       // => 2

Overrides

VariantMapBase.size

Methods

[Symbol.iterator]

Returns a FastIterator instance used to iterate over the values of this Iterable.

Definition

[Symbol.iterator](): FastIterator<T>;

Overrides

FastIterable.[Symbol.iterator]

addEntries

Returns the collection with the entries from the given StreamSource entries added.

Definition

addEntries(entries: StreamSource<readonly [K, V]>): WithKeyValue<Tp, K, V>['nonEmpty'];

Parameters

Name	Type	Description
entries	StreamSource<readonly [K, V]>	a StreamSource containing tuples with a key and value

example

HashMap.of([1, 'a']).addEntries([[2, 'b']]).toArray()   // => [[1, 'a'], [2, 'b']]

Overrides

RMapBase.addEntries, NonEmpty.addEntries

addEntry

Returns the collection with given entry added.

Definition

addEntry(entry: readonly [K, V]): WithKeyValue<Tp, K, V>['nonEmpty'];

Parameters

Name	Type	Description
entry	readonly [K, V]	a tuple containing a key and value

example

HashMap.of([1, 'a']).addEntry([2, 'b']).toArray()   // => [[1, 'a'], [2, 'b']]
HashMap.of([1, 'a']).addEntry([1, 'b']).toArray()   // => [[1, 'b']]

Overrides

RMapBase.addEntry

asNormal

Returns this collection typed as a 'possibly empty' collection.

Definition

asNormal(): (Tp & KeyValue<K, V>)['normal'];

example

HashMap.of([1, 1], [2, 2]).asNormal();  // type: HashMap<number, number>

Overrides

NonEmpty.asNormal

assumeNonEmpty

Returns a self reference since this collection is known to be non-empty.

Definition

assumeNonEmpty(): this;

example

const m = HashMap.of([1, 1], [2, 2]);
m === m.assumeNonEmpty()  // => true

Overrides

VariantMapBase.assumeNonEmpty, NonEmpty.assumeNonEmpty

drop

Returns a SortedMap containing all but the the first amount of elements of this SortedMap.

Definition

drop(amount: number): SortedMap<K, V>;

Parameters

Name	Type	Description
amount	number	the amount of elements to drop

note

a negative amount drops the last elements instead of the first, e.g. -2 is the last 2 elements

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]).asNormal();
console.log(m.drop(2).toArray())
// => [['c', ], ['d', 4]]
console.log(m.drop(-2).toArray())
// => [['a', 1], ['b', 2]]

Overrides

SortedMap.drop

filter

Returns a collection containing only those entries that satisfy given pred predicate.

Definition

filter(pred: (entry: readonly [K, V], index: number, halt: () => void) => boolean, options?: {
    negate?: boolean;
  }): WithKeyValue<Tp, K, V>['normal'];

Parameters

Name	Type	Description
pred	(entry: readonly [K, V], index: number, halt: () => void) => boolean	a predicate function receiving: - entry: the next entry - index: the entry index - halt: a function that, when called, ensures no next elements are passed
options	{     negate?: boolean;   }	(optional) an object containing the following properties: - negate: (default: false) when true will negate the predicate

example

HashMap.of([1, 'a'], [2, 'b'], [3, 'c']).filter(entry => entry[0] === 2 || entry[1] === 'c').toArray()
// => [[2, 'b'], [3, 'c']]

Overrides

VariantMapBase.filter

findIndex

Returns the index of the given key in the SortedMap, or -1 if the key is not present.

Definition

findIndex(key: K): number;

Parameters

Name	Type	Description
key	K	the key to find the index for

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]);
console.log(m.findIndex('c'))
// => 2
console.log(m.findIndex('q'))
// => -1

Overrides

SortedMap.findIndex

forEach

Performs given function f for each entry of the collection, using given state as initial traversal state.

Definition

forEach(f: (entry: readonly [K, V], index: number, halt: () => void) => void, options?: {
    state?: TraverseState;
  }): void;

Parameters

Name	Type	Description
f	(entry: readonly [K, V], index: number, halt: () => void) => void	the function to perform for each entry, receiving: - entry: the next tuple of a key and value - index: the index of the element - halt: a function that, if called, ensures that no new elements are passed
options	{     state?: TraverseState;   }	(optional) an object containing the following properties: - state:: (optional) the traversal state

example

HashMap.of([1, 'a'], [2, 'b'], [3, 'c']).forEach((entry, i, halt) => {
console.log([entry[1], entry[0]]);
if (i >= 1) halt();
})
// => logs ['a', 1]  ['b', 2]

note

O(N)

Overrides

VariantMapBase.forEach

get

Returns the value associated with the given key, or given otherwise value if the key is not in the collection.

Definitions

get<UK = K>(key: RelatedTo<K, UK>): V | undefined;

get<UK, O>(key: RelatedTo<K, UK>, otherwise: OptLazy<O>): V | O;

Type parameters

Name	Default	Description
UK	K

Parameters

Name	Type	Description
key	RelatedTo<K, UK>	the key to look for

example

const m = HashMap.of([1, 'a'], [2, 'b'])
m.get(2)          // => 'b'
m.get(3)          // => undefined
m.get(2, 'none')  // => 'b'
m.get(3, 'none')  // => 'none'

Overrides

VariantMapBase.get

getAtIndex

Returns the entry with its key at the given index of the key sort order of the SortedMap, or a fallback value (default: undefined) if the index is out of bounds.

Definitions

getAtIndex(index: number): readonly [K, V] | undefined;

getAtIndex<O>(index: number, otherwise: OptLazy<O>): readonly [K, V] | O;

Parameters

Name	Type	Description
index	number	the index in the key sort order

note

negative index values will retrieve the values from the end of the sort order, e.g. -1 is the last value

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]).asNormal();
console.log(m.getAtIndex(1))
// => ['b', 2]
console.log(m.getAtIndex(-1))
// => ['d', 4]
console.log(m.getAtIndex(10))
// => undefined
console.log(m.getAtIndex(10, 'q'))
// => 'q'

Overrides

SortedMap.getAtIndex

getKeyAtIndex

Returns the key at the given index of the key sort order of the SortedMap, or a fallback value (default: undefined) if the index is out of bounds.

Definitions

getKeyAtIndex(index: number): K | undefined;

getKeyAtIndex<O>(index: number, otherwise: OptLazy<O>): K | O;

Parameters

Name	Type	Description
index	number	the index in the key sort order

note

negative index values will retrieve the values from the end of the sort order, e.g. -1 is the last value

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]).asNormal();
console.log(m.getKeyAtIndex(1))
// => 'b'
console.log(m.getKeyAtIndex(-1))
// => 'd'
console.log(m.getKeyAtIndex(10))
// => undefined
console.log(m.getKeyAtIndex(10, 'q'))
// => 'q'

Overrides

SortedMap.getKeyAtIndex

getValueAtIndex

Returns the value associated with the key at the given index of the key sort order of the SortedMap, or a fallback value (default: undefined) if the index is out of bounds.

Definitions

getValueAtIndex(index: number): V | undefined;

getValueAtIndex<O>(index: number, otherwise: OptLazy<O>): V | O;

Parameters

Name	Type	Description
index	number	the index in the key sort order

note

negative index values will retrieve the values from the end of the sort order, e.g. -1 is the last value

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]).asNormal();
console.log(m.getValueAtIndex(1))
// => 2
console.log(m.getValueAtIndex(-1))
// => 4
console.log(m.getValueAtIndex(10))
// => undefined
console.log(m.getValueAtIndex(10, 'q'))
// => 'q'

Overrides

SortedMap.getValueAtIndex

hasKey

Returns true if the given key is present in the collection.

Definition

hasKey<UK = K>(key: RelatedTo<K, UK>): boolean;

Type parameters

Name	Default	Description
UK	K

Parameters

Name	Type	Description
key	RelatedTo<K, UK>	the key to look for

example

const m = HashMap.of([1, 'a'], [2, 'b'])
m.hasKey(2)    // => true
m.hasKey(3)    // => false

Overrides

VariantMapBase.hasKey

mapValues

Returns a non-empty collection with the same keys, but where the given mapFun function is applied to each entry value.

Definition

mapValues<V2>(mapFun: (value: V, key: K) => V2): (Tp & KeyValue<K, V2>)['nonEmpty'];

Type parameters

Name	Description
V2

Parameters

Name	Type	Description
mapFun	(value: V, key: K) => V2	a function taking a value and a key, and returning a new value

example

HashMap.of([1, 'a'], [2, 'abc']).mapValues(v => v.length).toArray()
// => [[1, 1], [2, 3]]

Overrides

VariantMapBase.mapValues, NonEmpty.mapValues

max

Returns the entry with the maximum key of the SortedMap.

Definition

max(): readonly [K, V];

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]).asNormal();
console.log(m.max())
// => ['d', 4]

Overrides

SortedMap.max

maxKey

Returns the maximum key of the SortedMap.

Definition

maxKey(): K;

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]).asNormal();
console.log(m.maxKey())
// => 'a'

Overrides

SortedMap.maxKey

maxValue

Returns the value associated with the maximum key of the SortedMap.

Definition

maxValue(): V;

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]).asNormal();
console.log(m.maxValue())
// => 4

Overrides

SortedMap.maxValue

min

Returns the entry with the minimum key of the SortedMap.

Definition

min(): readonly [K, V];

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]);
console.log(m.min())
// => ['a', 1]

Overrides

SortedMap.min

minKey

Returns the minimum key of the SortedMap.

Definition

minKey(): K;

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]);
console.log(m.minKey())
// => 'a'

Overrides

SortedMap.minKey

minValue

Returns the value associated with the minimum key of the SortedMap.

Definition

minValue(): V;

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]).asNormal();
console.log(m.minValue())
// => 1

Overrides

SortedMap.minValue

modifyAt

Returns the collection with the given atKey key modified according to given options.

Definition

modifyAt(atKey: K, options: {
    ifNew?: OptLazyOr<V, Token>;
    ifExists?: (<V2 extends V = V>(currentEntry: V & V2, remove: Token) => V |Token)| V;
  }): WithKeyValue<Tp, K, V>['normal'];

Parameters

Name	Type	Description
atKey	K	the key at which to modify the collection
options	{     ifNew?: OptLazyOr<V, Token>;     ifExists?: (<V2 extends V = V>(currentEntry: V & V2, remove: Token) => V |Token)| V;   }	an object containing the following information: - ifNew: (optional) if the given atKey is not present in the collection, this value or function will be used to generate a new entry. If a function returning the token argument is given, no new entry is created. - ifExists: (optional) if a value is associated with given atKey, this function is called with the given value to return a new value. As a second argument, a remove token is given. If the function returns this token, the current entry is removed.

example

const m = HashMap.of([1, 'a'], [2, 'b'])
m.modifyAt(3, { ifNew: 'c' }).toArray()
// => [[1, 'a'], [2, 'b'], [3, 'c']]
m.modifyAt(3, { ifNew: (none) => 1 < 2 ? none : 'c' }).toArray()
// => [[1, 'a'], [2, 'b']]
m.modifyAt(2, { ifExists: () => 'c' }).toArray()
// => [[1, 'a'], [2, 'c']]
m.modifyAt(2, { ifExists: (v) => v + 'z' }).toArray()
// => [[1, 'a'], [2, 'bz']]
m.modifyAt(2, { ifExists: (v, remove) => v === 'a' ? v : remove }).toArray()
// => [[1, 'a']]

Overrides

RMapBase.modifyAt

nonEmpty

Returns true since this collection is known to be non-empty

Definition

nonEmpty(): this is WithKeyValue<Tp, K, V>['nonEmpty'];

example

HashMap.of([1, 1], [2, 2]).nonEmpty()   // => true

Overrides

VariantMapBase.nonEmpty, NonEmpty.nonEmpty

removeKey

Returns the collection where the entry associated with given key is removed if it was part of the collection.

Definition

removeKey<UK = K>(key: RelatedTo<K, UK>): WithKeyValue<Tp, K, V>['normal'];

Type parameters

Name	Default	Description
UK	K

Parameters

Name	Type	Description
key	RelatedTo<K, UK>	the key of the entry to remove

example

const m = HashMap.of([1, 'a'], [2, 'b'])
m.removeKey(2).toArray()   // => [[1, 'a']]
m.removeKey(3) === m       // true

note

guarantees same object reference if the key is not present

Overrides

VariantMapBase.removeKey

removeKeyAndGet

Returns a tuple containing the collection of which the entry associated with given key is removed, and the value that is associated with that key. If the key is not present, it will return undefined instead.

Definition

removeKeyAndGet<UK = K>(key: RelatedTo<K, UK>): [WithKeyValue<Tp, K, V>['normal'], V] | undefined;

Type parameters

Name	Default	Description
UK	K

Parameters

Name	Type	Description
key	RelatedTo<K, UK>	the key of the entry to remove

example

const m = HashMap.of([1, 'a'], [2, 'b'])
const result = m.removeKeyAndGet(2)
if (result !== undefined) console.log([result[0].toString(), result[1]])    // => logs [HashMap(1 => 'a'), 'b']
console.log(m.removeKeyAndGet(3))                                           // => logs undefined

Overrides

VariantMapBase.removeKeyAndGet

removeKeys

Returns the collection where the entries associated with each key in given keys are removed if they were present.

Definition

removeKeys<UK = K>(keys: StreamSource<RelatedTo<K, UK>>): WithKeyValue<Tp, K, V>['normal'];

Type parameters

Name	Default	Description
UK	K

Parameters

Name	Type	Description
keys	StreamSource<RelatedTo<K, UK>>	a StreamSource of keys to remove

example

const m = HashMap.of([1, 'a'], [2, 'b'])
m.removeKeys([1, 3]).toArray()     // => [[2, 'b']]
m.removeKeys([1, 3, 2]).toArray()  // => []
m.removeKeys([3, 4, 5]) === m      // => true

note

guarantees same object reference if none of the keys are present

Overrides

VariantMapBase.removeKeys

set

Returns the collection with the given key associated to the given value.

Definition

set(key: K, value: V): WithKeyValue<Tp, K, V>['nonEmpty'];

Parameters

Name	Type	Description
key	K	the entry key to add
value	V	the entry value to add

example

HashMap.of([1, 'a']).set(2, 'b').toArray()   // => [[1, 'a'], [2, 'b']]
HashMap.of([1, 'a']).set(1, 'b').toArray()   // => [[1, 'b']]

note

if the key is already associated, the previous value will be 'replaced'

Overrides

RMapBase.set

slice

Returns a SortedMap containing only those entries whose keys are within the given keyRange.

Definition

slice(keyRange: Range<K>): SortedMap<K, V>;

Parameters

Name	Type	Description
keyRange	Range<K>	a Range defining the keys to include

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]).asNormal();
console.log(m.slice({ start: 'b', end: 'c' }).toArray())
// => [['b', 2], ['c', 3]]

Overrides

SortedMap.slice

sliceIndex

Returns a SortedMap containing only those entries that are within the given range index range of they key sort order.

Definition

sliceIndex(range: IndexRange): SortedMap<K, V>;

Parameters

Name	Type	Description
range	IndexRange	an IndexRange defining the sort order indices to include.

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]).asNormal();
console.log(m.sliceIndex({ start: 1, amount: 2 }).toArray())
// => [['b', 2], ['c', 3]]

Overrides

SortedMap.sliceIndex

stream

undocumented

Definition

stream(options?: {
      reversed?: boolean;
    }): Stream.NonEmpty<readonly [K, V]>;

Parameters

Name	Type	Description
options	{       reversed?: boolean;     }

Overrides

NonEmpty.stream, NonEmpty.stream, SortedMap.stream

streamKeys

undocumented

Definition

streamKeys(options?: {
      reversed?: boolean;
    }): Stream.NonEmpty<K>;

Parameters

Name	Type	Description
options	{       reversed?: boolean;     }

Overrides

SortedMap.streamKeys, NonEmpty.streamKeys

streamRange

Returns a Stream of sorted entries of this collection within the given keyRange.

Definition

streamRange(keyRange: Range<K>, options?: {
    reversed?: boolean;
  }): Stream<readonly [K, V]>;

Parameters

Name	Type	Description
keyRange	Range<K>	the range of keys to include in the stream
options	{     reversed?: boolean;   }	(optional) an object containing the following properties: - reversed: (default: false) when true reverses the stream element order

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]);
console.log(m.streamRange({ start: 'b', end: 'c' }).toArray())
// => ['b', 'c']

Overrides

SortedMap.streamRange

streamSliceIndex

Returns a Stream of sorted entries of this collection within the given range index range.

Definition

streamSliceIndex(range: IndexRange, options?: {
    reversed?: boolean;
  }): Stream<readonly [K, V]>;

Parameters

Name	Type	Description
range	IndexRange	the range of keys to include in the stream
options	{     reversed?: boolean;   }

example

const m = SortedMap.of(['b', 2], ['d', 4], ['a', 1], ['c', 3]);
console.log(m.streamSliceIndex({ start: 1, amount: 2 }).toArray())
// => [['b', 2], ['c', 3]]

Overrides

SortedMap.streamSliceIndex

streamValues

undocumented

Definition

streamValues(options?: {
      reversed?: boolean;
    }): Stream.NonEmpty<V>;

Parameters

Name	Type	Description
options	{       reversed?: boolean;     }

Overrides

SortedMap.streamValues, NonEmpty.streamValues

take

undocumented

Definition

take<N extends number>(amount: N): 0 extends N ? SortedMap<K, V> : SortedMap.NonEmpty<K, V>;

Type parameters

Name	Constraints	Description
N	number

Parameters

Name	Type	Description
amount	N

Overrides

SortedMap.take

toArray

Returns a non-empty array containing all entries in this collection.

Definition

toArray(): ArrayNonEmpty<readonly [K, V]>;

example

HashMap.of([1, 'a'], [2, 'b']).toArray()   // => [[1, 'a'], [2, 'b']]

note

O(log(N)) @note it is safe to mutate the returned array, however, the array elements are not copied, thus should be treated as read-only

Overrides

VariantMapBase.toArray, NonEmpty.toArray

toBuilder

Returns a builder object containing the entries of this collection.

Definition

toBuilder(): WithKeyValue<Tp, K, V>['builder'];

example

const builder: HashMap.Builder<number, string> = HashMap.of([1, 'a'], [2, 'b']).toBuilder()

Overrides

RMapBase.toBuilder

toJSON

Returns a JSON representation of this collection.

Definition

toJSON(): ToJSON<(readonly [K, V])[]>;

example

HashMap.of([1, 'a'], [2, 'b']).toJSON()   // => { dataType: 'HashMap', value: [[1, 'a'], [2, 'b']] }

Overrides

VariantMapBase.toJSON

toString

Returns a string representation of this collection.

Definition

toString(): string;

example

HashMap.of([1, 'a'], [2, 'b']).toString()   // => HashMap(1 => 'a', 2 => 'b')

Overrides

VariantMapBase.toString

updateAt

Returns the collection where the value associated with given key is updated with the given update value or update function.

Definition

updateAt<UK = K>(key: RelatedTo<K, UK>, update: RMapBase.Update<V>): WithKeyValue<Tp, K, V>['nonEmpty'];

Type parameters

Name	Default	Description
UK	K

Parameters

Name	Type	Description
key	RelatedTo<K, UK>	the key of the entry to update
update	RMapBase.Update<V>	a new value or function taking the current value and returning a new value

example

const m = HashMap.of([1, 'a'], [2, 'b'])
m.updateAt(3, 'a').toArray()
// => [[1, 'a'], [2, 'b']]
m.updateAt(2, 'c').toArray()
// => [[1, 'a'], [2, 'c']]
m.updateAt(2, v => v + 'z')
// => [[1, 'a'], [2, 'cz]]

Overrides

RMapBase.updateAt, NonEmpty.updateAt