Transformer.distinctPrevious | /mod.ts | rimbu@0.14.0

x/rimbu/mod.ts>Transformer.distinctPrevious

Rimbu is a TypeScript library focused on immutable, performant, and type-safe collections and other tools.

actor base bimap bimultimap collection-types common core deep graph hashed list multimap multiset ordered sorted spy stream table typical

mod.ts (default module)

ArrowValuedGraphHashed

ArrowValuedGraphSorted

EdgeValuedGraphHashed

EdgeValuedGraphSorted

HashMultiMapHashValue

HashMultiMapSortedValue

HashMultiSet

HashSet

HashTableHashColumn

HashTableSortedColumn

SortedMultiMapHashValue

SortedMultiMapSortedValue

SortedMultiSet

SortedSet

SortedTableHashColumn

SortedTableSortedColumn

function Transformer.distinctPrevious

import { Transformer } from "https://deno.land/x/rimbu@0.14.0/mod.ts";
const { distinctPrevious } = Transformer;

distinctPrevious<T>(eq?: Eq<T>): Transformer<T>

Returns a transformer that returns only those elements from the input that are different to previous element according to the optionally given eq function.

Examples

Example 1

Stream.of(1, 1, 2, 3, 2, 2)
  .transform(Transformer.distinctPrevious())
  .toArray()
// => [1, 2, 3, 2]

Type Parameters

Parameters

optional

eq: Eq<T> = [UNSUPPORTED]

(default: Eq.objectIs) the equality testing function

Returns

Transformer<T>