39 lines
532 B
Go
39 lines
532 B
Go
package mergechannel
|
|
|
|
import (
|
|
"errors"
|
|
"sync"
|
|
)
|
|
|
|
var ErrInsufficientChannels = errors.New("channels count must be >2")
|
|
|
|
func merge[T any](channels ...<-chan T) (<-chan T, error) {
|
|
out := make(chan T)
|
|
|
|
if len(channels) < 2 {
|
|
close(out)
|
|
|
|
return out, ErrInsufficientChannels
|
|
}
|
|
|
|
var wg sync.WaitGroup
|
|
wg.Add(len(channels))
|
|
|
|
for _, c := range channels {
|
|
go func(channel <-chan T) {
|
|
defer wg.Done()
|
|
|
|
for v := range channel {
|
|
out <- v
|
|
}
|
|
}(c)
|
|
}
|
|
|
|
go func() {
|
|
wg.Wait()
|
|
close(out)
|
|
}()
|
|
|
|
return out, nil
|
|
}
|