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Function: toMultiple()

Returns a Reducer or OptionalReducer that reduces values to an object or array of the same shape as reducers using all of the reducers in reducers.

Returns an OptionalReducer if at least one of the input reducers is an OptionalReducer. Otherwise, returns a Reducer.

Example​

import { map, pipe, reduce, toCount, toJoin, toMultiple, toSet } from 'lfi'

console.log(
  pipe(
    [`sloth`, `lazy`, `sleep`],
    map(word => word.length),
    reduce(toMultiple([toSet(), toCount(), toJoin(`,`)])),
  ),
)
//=> [
//=>   Set(2) { 5, 4 },
//=>   3,
//=>   '5,4,5'
//=> ]

console.log(
  pipe(
    [`sloth`, `lazy`, `sleep`],
    map(word => word.length),
    reduce(
      toMultiple({
        set: toSet(),
        count: toCount(),
        string: toJoin(`,`),
      }),
    ),
  ),
)
//=> {
//=>   set: Set(2) { 5, 4 },
//=>   count: 3,
//=>   string: '5,4,5'
//=> }
Playground

Since​

v2.0.0

Call Signature​

toMultiple<Value, Reducers>(reducers): Reducer<Value, { -readonly [Key in string | number | symbol]: Reducers[Key] extends RawReducerWithoutFinish<Value, Acc> ? Acc : never }, { -readonly [Key in string | number | symbol]: Reducers[Key] extends RawReducerWithFinish<Value, any, Finished> ? Finished : Reducers[Key] extends RawReducerWithoutFinish<Value, Acc> ? Acc : never }>

Type Parameters​

• Value

• Reducers extends readonly [RawReducerWithoutFinish<Value, any>] | readonly RawReducerWithoutFinish<Value, any>[] | Readonly<Record<PropertyKey, RawReducerWithoutFinish<Value, any>>>

Parameters​

reducers​

Reducers

Returns​

Reducer<Value, { -readonly [Key in string | number | symbol]: Reducers[Key] extends RawReducerWithoutFinish<Value, Acc> ? Acc : never }, { -readonly [Key in string | number | symbol]: Reducers[Key] extends RawReducerWithFinish<Value, any, Finished> ? Finished : Reducers[Key] extends RawReducerWithoutFinish<Value, Acc> ? Acc : never }>

Defined in​

collections.d.ts:320

Call Signature​

toMultiple<Value, Reducers>(reducers): OptionalReducer<Value, { -readonly [Key in string | number | symbol]: Reducers[Key] extends RawReducerWithFinish<Value, any, Finished> ? Finished : Reducers[Key] extends RawOptionalReducerWithFinish<Value, Finished> ? Finished : Value }>

Type Parameters​

• Value

• Reducers extends readonly [RawReducerWithoutFinish<Value, any> | RawOptionalReducerWithoutFinish<Value> | FunctionReducer<Value>] | readonly (RawReducerWithoutFinish<Value, any> | RawOptionalReducerWithoutFinish<Value> | FunctionReducer<Value>)[] | Readonly<Record<PropertyKey, RawReducerWithoutFinish<Value, any> | RawOptionalReducerWithoutFinish<Value> | FunctionReducer<Value>>>

Parameters​

reducers​

Reducers

Returns​

OptionalReducer<Value, { -readonly [Key in string | number | symbol]: Reducers[Key] extends RawReducerWithFinish<Value, any, Finished> ? Finished : Reducers[Key] extends RawOptionalReducerWithFinish<Value, Finished> ? Finished : Value }>

Defined in​

collections.d.ts:351