func ExampleJoin_inner() {
left := store.SliceStore{}
left.BeginWriting()
left.WriteRecord(store.NewRecord("1", "news", 0))
left.WriteRecord(store.NewRecord("2", "book", 0))
left.EndWriting()
right := store.SliceStore{}
right.BeginWriting()
right.WriteRecord(store.NewRecord("1", "paper", 0))
right.WriteRecord(store.NewRecord("3", "brush", 0))
right.EndWriting()
output := store.SliceStore{}
joiner := Join(nil, nil)
transformer.RunTransformer(transformer.MakeGroupDoFunc(joiner), store.NewDemuxingReader(&left, &right), &output)
output.BeginReading()
for {
record, err := output.ReadRecord()
if err != nil {
panic(err)
}
if record == nil {
break
}
fmt.Printf("%s: %s\n", record.Key, record.Value)
}
output.EndReading()
// Output:
//
// 1: newspaper
}
func ExampleJoin_multiple() {
left := store.SliceStore{}
left.BeginWriting()
left.WriteRecord(store.NewRecord("1", "what", 0))
left.WriteRecord(store.NewRecord("2", "news", 0))
left.EndWriting()
middle := store.SliceStore{}
middle.BeginWriting()
middle.WriteRecord(store.NewRecord("1", "so", 0))
middle.WriteRecord(store.NewRecord("3", "the", 0))
middle.EndWriting()
right := store.SliceStore{}
right.BeginWriting()
right.WriteRecord(store.NewRecord("1", "ever", 0))
right.WriteRecord(store.NewRecord("3", "less", 0))
right.EndWriting()
output := store.SliceStore{}
joiner := Join([]byte("never"), []byte("paper"), []byte("man"))
transformer.RunTransformer(transformer.MakeGroupDoFunc(joiner), store.NewDemuxingReader(&left, &middle, &right), &output)
output.BeginReading()
for {
record, err := output.ReadRecord()
if err != nil {
panic(err)
}
if record == nil {
break
}
fmt.Printf("%s: %s\n", record.Key, record.Value)
}
output.EndReading()
// Output:
//
// 1: whatsoever
// 2: newspaperman
// 3: nevertheless
}