Function: toGrouped()
Returns a Reducer that reduces key-value pairs using outerReducer
and reduces values with the same key using innerReducer.
Example
console.log(
pipe(
[`sloth`, `some sloth`, `sleep`, `more sloth`, `even more sloth`],
map(string => [string.length, string]),
reduce(toGrouped(toArray(), toMap())),
),
)
//=> Map(3) {
//=> 5 => [ 'sloth', 'sleep' ],
//=> 10 => [ 'some sloth', 'more sloth' ],
//=> 15 => [ 'even more sloth' ]
//=> }
toGrouped(innerReducer, outerReducer)
toGrouped<
Key,Value,InnerAcc,InnerFinished,InnerThis,OuterAcc,OuterThis>(innerReducer,outerReducer):Reducer<readonly [Key,Value],never,OuterAcc>
Returns a Reducer that reduces key-value pairs using outerReducer
and reduces values with the same key using innerReducer.
Type Parameters
• Key
• Value
• InnerAcc
• InnerFinished
• InnerThis
• OuterAcc
• OuterThis
Parameters
• innerReducer: Readonly<RawReducerWithFinish<Value, InnerAcc, InnerFinished, InnerThis>>
• outerReducer: Readonly<RawKeyedReducer<Key, InnerAcc | InnerFinished, OuterAcc, OuterThis>>
Returns
Reducer<readonly [Key, Value], never, OuterAcc>
Example
console.log(
pipe(
[`sloth`, `some sloth`, `sleep`, `more sloth`, `even more sloth`],
map(string => [string.length, string]),
reduce(toGrouped(toArray(), toMap())),
),
)
//=> Map(3) {
//=> 5 => [ 'sloth', 'sleep' ],
//=> 10 => [ 'some sloth', 'more sloth' ],
//=> 15 => [ 'even more sloth' ]
//=> }
Defined in
toGrouped(innerReducer)
toGrouped<
Value,InnerAcc,InnerFinished,InnerThis>(innerReducer): <Key,OuterAcc,OuterThis>(outerReducer) =>Reducer<readonly [Key,Value],never,OuterAcc>
Returns a Reducer that reduces key-value pairs using outerReducer
and reduces values with the same key using innerReducer.
Type Parameters
• Value
• InnerAcc
• InnerFinished
• InnerThis
Parameters
• innerReducer: Readonly<RawReducerWithFinish<Value, InnerAcc, InnerFinished, InnerThis>>
Returns
Function
Type Parameters
• Key
• OuterAcc
• OuterThis
Parameters
• outerReducer: Readonly<RawKeyedReducer<Key, InnerAcc | InnerFinished, OuterAcc, OuterThis>>
Returns
Reducer<readonly [Key, Value], never, OuterAcc>
Example
console.log(
pipe(
[`sloth`, `some sloth`, `sleep`, `more sloth`, `even more sloth`],
map(string => [string.length, string]),
reduce(toGrouped(toArray(), toMap())),
),
)
//=> Map(3) {
//=> 5 => [ 'sloth', 'sleep' ],
//=> 10 => [ 'some sloth', 'more sloth' ],
//=> 15 => [ 'even more sloth' ]
//=> }
Defined in
toGrouped(innerReducer, outerReducer)
toGrouped<
Key,Value,InnerAcc,InnerThis,OuterAcc,OuterThis>(innerReducer,outerReducer):Reducer<readonly [Key,Value],never,OuterAcc>
Returns a Reducer that reduces key-value pairs using outerReducer
and reduces values with the same key using innerReducer.
Type Parameters
• Key
• Value
• InnerAcc
• InnerThis
• OuterAcc
• OuterThis
Parameters
• innerReducer: Readonly<RawReducerWithoutFinish<Value, InnerAcc, InnerThis>>
• outerReducer: Readonly<RawKeyedReducer<Key, InnerAcc, OuterAcc, OuterThis>>
Returns
Reducer<readonly [Key, Value], never, OuterAcc>
Example
console.log(
pipe(
[`sloth`, `some sloth`, `sleep`, `more sloth`, `even more sloth`],
map(string => [string.length, string]),
reduce(toGrouped(toArray(), toMap())),
),
)
//=> Map(3) {
//=> 5 => [ 'sloth', 'sleep' ],
//=> 10 => [ 'some sloth', 'more sloth' ],
//=> 15 => [ 'even more sloth' ]
//=> }
Defined in
toGrouped(innerReducer)
toGrouped<
Value,InnerAcc,InnerThis>(innerReducer): <Key,OuterAcc,OuterThis>(outerReducer) =>Reducer<readonly [Key,Value],never,OuterAcc>
Returns a Reducer that reduces key-value pairs using outerReducer
and reduces values with the same key using innerReducer.
Type Parameters
• Value
• InnerAcc
• InnerThis
Parameters
• innerReducer: Readonly<RawReducerWithoutFinish<Value, InnerAcc, InnerThis>>
Returns
Function
Type Parameters
• Key
• OuterAcc
• OuterThis
Parameters
• outerReducer: Readonly<RawKeyedReducer<Key, InnerAcc, OuterAcc, OuterThis>>
Returns
Reducer<readonly [Key, Value], never, OuterAcc>
Example
console.log(
pipe(
[`sloth`, `some sloth`, `sleep`, `more sloth`, `even more sloth`],
map(string => [string.length, string]),
reduce(toGrouped(toArray(), toMap())),
),
)
//=> Map(3) {
//=> 5 => [ 'sloth', 'sleep' ],
//=> 10 => [ 'some sloth', 'more sloth' ],
//=> 15 => [ 'even more sloth' ]
//=> }
Defined in
toGrouped(innerReducer, outerReducer)
toGrouped<
Key,Value,InnerFinished,InnerThis,OuterAcc,OuterThis>(innerReducer,outerReducer):Reducer<readonly [Key,Value],never,OuterAcc>
Returns a Reducer that reduces key-value pairs using outerReducer
and reduces values with the same key using innerReducer.
Type Parameters
• Key
• Value
• InnerFinished
• InnerThis
• OuterAcc
• OuterThis
Parameters
• innerReducer: Readonly<RawOptionalReducerWithFinish<Value, InnerFinished, InnerThis>>
• outerReducer: Readonly<RawKeyedReducer<Key, Value | InnerFinished, OuterAcc, OuterThis>>
Returns
Reducer<readonly [Key, Value], never, OuterAcc>
Example
console.log(
pipe(
[`sloth`, `some sloth`, `sleep`, `more sloth`, `even more sloth`],
map(string => [string.length, string]),
reduce(toGrouped(toArray(), toMap())),
),
)
//=> Map(3) {
//=> 5 => [ 'sloth', 'sleep' ],
//=> 10 => [ 'some sloth', 'more sloth' ],
//=> 15 => [ 'even more sloth' ]
//=> }
Defined in
toGrouped(innerReducer)
toGrouped<
Value,InnerFinished,InnerThis>(innerReducer): <Key,OuterAcc,OuterThis>(outerReducer) =>Reducer<readonly [Key,Value],never,OuterAcc>
Returns a Reducer that reduces key-value pairs using outerReducer
and reduces values with the same key using innerReducer.
Type Parameters
• Value
• InnerFinished
• InnerThis
Parameters
• innerReducer: Readonly<RawOptionalReducerWithFinish<Value, InnerFinished, InnerThis>>
Returns
Function
Type Parameters
• Key
• OuterAcc
• OuterThis
Parameters
• outerReducer: Readonly<RawKeyedReducer<Key, Value | InnerFinished, OuterAcc, OuterThis>>
Returns
Reducer<readonly [Key, Value], never, OuterAcc>
Example
console.log(
pipe(
[`sloth`, `some sloth`, `sleep`, `more sloth`, `even more sloth`],
map(string => [string.length, string]),
reduce(toGrouped(toArray(), toMap())),
),
)
//=> Map(3) {
//=> 5 => [ 'sloth', 'sleep' ],
//=> 10 => [ 'some sloth', 'more sloth' ],
//=> 15 => [ 'even more sloth' ]
//=> }
Defined in
toGrouped(innerReducer, outerReducer)
toGrouped<
Key,Value,InnerThis,OuterAcc,OuterThis>(innerReducer,outerReducer):Reducer<readonly [Key,Value],never,OuterAcc>
Returns a Reducer that reduces key-value pairs using outerReducer
and reduces values with the same key using innerReducer.
Type Parameters
• Key
• Value
• InnerThis
• OuterAcc
• OuterThis
Parameters
• innerReducer: Readonly<RawOptionalReducerWithoutFinish<Value, InnerThis>>
• outerReducer: Readonly<RawKeyedReducer<Key, Value, OuterAcc, OuterThis>>
Returns
Reducer<readonly [Key, Value], never, OuterAcc>
Example
console.log(
pipe(
[`sloth`, `some sloth`, `sleep`, `more sloth`, `even more sloth`],
map(string => [string.length, string]),
reduce(toGrouped(toArray(), toMap())),
),
)
//=> Map(3) {
//=> 5 => [ 'sloth', 'sleep' ],
//=> 10 => [ 'some sloth', 'more sloth' ],
//=> 15 => [ 'even more sloth' ]
//=> }
Defined in
toGrouped(innerReducer)
toGrouped<
Value,InnerThis>(innerReducer): <Key,OuterAcc,OuterThis>(outerReducer) =>Reducer<readonly [Key,Value],never,OuterAcc>
Returns a Reducer that reduces key-value pairs using outerReducer
and reduces values with the same key using innerReducer.
Type Parameters
• Value
• InnerThis
Parameters
• innerReducer: Readonly<RawOptionalReducerWithoutFinish<Value, InnerThis>>
Returns
Function
Type Parameters
• Key
• OuterAcc
• OuterThis
Parameters
• outerReducer: Readonly<RawKeyedReducer<Key, Value, OuterAcc, OuterThis>>
Returns
Reducer<readonly [Key, Value], never, OuterAcc>
Example
console.log(
pipe(
[`sloth`, `some sloth`, `sleep`, `more sloth`, `even more sloth`],
map(string => [string.length, string]),
reduce(toGrouped(toArray(), toMap())),
),
)
//=> Map(3) {
//=> 5 => [ 'sloth', 'sleep' ],
//=> 10 => [ 'some sloth', 'more sloth' ],
//=> 15 => [ 'even more sloth' ]
//=> }
Defined in
toGrouped(innerReducer, outerReducer)
toGrouped<
Key,Value,OuterAcc,OuterThis>(innerReducer,outerReducer):Reducer<readonly [Key,Value],never,OuterAcc>
Returns a Reducer that reduces key-value pairs using outerReducer
and reduces values with the same key using innerReducer.
Type Parameters
• Key
• Value
• OuterAcc
• OuterThis
Parameters
• innerReducer: FunctionReducer<Value>
• outerReducer: Readonly<RawKeyedReducer<Key, Value, OuterAcc, OuterThis>>
Returns
Reducer<readonly [Key, Value], never, OuterAcc>
Example
console.log(
pipe(
[`sloth`, `some sloth`, `sleep`, `more sloth`, `even more sloth`],
map(string => [string.length, string]),
reduce(toGrouped(toArray(), toMap())),
),
)
//=> Map(3) {
//=> 5 => [ 'sloth', 'sleep' ],
//=> 10 => [ 'some sloth', 'more sloth' ],
//=> 15 => [ 'even more sloth' ]
//=> }
Defined in
toGrouped(innerReducer)
toGrouped<
Value>(innerReducer): <Key,OuterAcc,OuterThis>(outerReducer) =>Reducer<readonly [Key,Value],never,OuterAcc>
Returns a Reducer that reduces key-value pairs using outerReducer
and reduces values with the same key using innerReducer.
Type Parameters
• Value
Parameters
• innerReducer: FunctionReducer<Value>
Returns
Function
Type Parameters
• Key
• OuterAcc
• OuterThis
Parameters
• outerReducer: Readonly<RawKeyedReducer<Key, Value, OuterAcc, OuterThis>>
Returns
Reducer<readonly [Key, Value], never, OuterAcc>
Example
console.log(
pipe(
[`sloth`, `some sloth`, `sleep`, `more sloth`, `even more sloth`],
map(string => [string.length, string]),
reduce(toGrouped(toArray(), toMap())),
),
)
//=> Map(3) {
//=> 5 => [ 'sloth', 'sleep' ],
//=> 10 => [ 'some sloth', 'more sloth' ],
//=> 15 => [ 'even more sloth' ]
//=> }