Why Go
- Case Studies
  
  Common problems companies solve with Go
- Use Cases
  
  Stories about how and why companies use Go
- Security Policy
  
  How Go can help keep you secure by default
Learn
Docs
- Effective Go
  
  Tips for writing clear, performant, and idiomatic Go code
- Go User Manual
  
  A complete introduction to building software with Go
- Standard library
  
  Reference documentation for Go's standard library
- Release Notes
  
  Learn what's new in each Go release
Packages
Community
- Recorded Talks
  
  Videos from prior events
- Meetups
  
  Meet other local Go developers
- Conferences
  
  Learn and network with Go developers from around the world
- Go blog
  
  The Go project's official blog.
- Go project
  
  Get help and stay informed from Go
- Get connected

mr

package

Go to main page

Versions in this module

v0

v0.8.8

Jun 28, 2023

v0.8.7

Mar 13, 2023

v0.8.6

Oct 3, 2022

v0.8.5

Feb 10, 2022

v0.8.4

Feb 9, 2022

v0.8.3

Sep 14, 2021

v0.8.2

Sep 10, 2021

v0.8.1

Aug 27, 2021

Changes in this version

+ func Fingerprint64(key []byte) uint64

+ func FirstValueReducer(ctx context.Context, input ReducerInput) ([]byte, error)

+ func IdentityMapper(ctx context.Context, key, value []byte, emit MapEmitFunc) error

+ func NilReducer(ctx context.Context, input ReducerInput) ([]byte, error)

+ func ShardForKey(key []byte, n int) int

+ func SliceReducer(ctx context.Context, input ReducerInput) ([]byte, error)

+ func SumReducer(ctx context.Context, input ReducerInput) ([]byte, error)

+ func WordCountMapper(ctx context.Context, key, value []byte, emit MapEmitFunc) error

+ type CollectingMapEmitter struct

+ NumShards int

+ func NewCollectingMapEmitter(numShards int) *CollectingMapEmitter

+ func (e *CollectingMapEmitter) AsModifyArgs(qPrefix string, additional ...entroq.ModifyArg) ([]entroq.ModifyArg, error)

+ func (e *CollectingMapEmitter) Emit(_ context.Context, key, value []byte) error

+ type KV struct

+ Key []byte

+ Key2 []byte

+ Value []byte

+ func NewKV(key, value []byte) *KV

+ func (kv *KV) String() string

+ type MapEmitFunc func(ctx context.Context, key, value []byte) error

+ type MapEmitter interface

+ AsModifyArgs func(prefix string, additional ...entroq.ModifyArg) ([]entroq.ModifyArg, error)

+ Emit func(ctx context.Context, key, value []byte) error

+ type MapReduce struct

+ Data []*KV

+ EarlyReduce Reducer

+ Map Mapper

+ NumMappers int

+ NumReducers int

+ QueuePrefix string

+ Reduce Reducer

+ func NewMapReduce(eq *entroq.EntroQ, qPrefix string, opts ...MapReduceOption) *MapReduce

+ func (mr *MapReduce) Run(ctx context.Context) (string, error)

+ type MapReduceOption func(*MapReduce)

+ func AddInput(kvs ...*KV) MapReduceOption

+ func WithEarlyReduce(r Reducer) MapReduceOption

+ func WithMap(m Mapper) MapReduceOption

+ func WithNumMappers(n int) MapReduceOption

+ func WithNumReducers(n int) MapReduceOption

+ func WithReduce(r Reducer) MapReduceOption

+ type MapWorker struct

+ EarlyReduce Reducer

+ InputQueue string

+ Map Mapper

+ Name string

+ OutputPrefix string

+ func NewMapWorker(eq *entroq.EntroQ, inQueue string, newEmitter func() MapEmitter, ...) *MapWorker

+ func (w *MapWorker) Run(ctx context.Context) error

+ type MapWorkerOption func(*MapWorker)

+ func MapAsName(name string) MapWorkerOption

+ func MapToOutputPrefix(p string) MapWorkerOption

+ func WithEarlyReducer(r Reducer) MapWorkerOption

+ func WithMapper(m Mapper) MapWorkerOption

+ type Mapper func(ctx context.Context, key, value []byte, emit MapEmitFunc) error

+ type ReduceWorker struct

+ InputQueue string

+ MapEmptyQueue string

+ Name string

+ OutputQueue string

+ Reduce Reducer

+ func NewReduceWorker(eq *entroq.EntroQ, mapEmptyQueue, inQueue string, opts ...ReduceWorkerOption) *ReduceWorker

+ func (w *ReduceWorker) Run(ctx context.Context) error

+ type ReduceWorkerOption func(*ReduceWorker)

+ func ReduceAsName(name string) ReduceWorkerOption

+ func ReduceToOutput(q string) ReduceWorkerOption

+ func WithReducer(reduce Reducer) ReduceWorkerOption

+ type Reducer func(ctx context.Context, input ReducerInput) ([]byte, error)

+ type ReducerInput interface

+ Err func() error

+ Key func() []byte

+ Next func() bool

+ Value func() []byte