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main.go
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main.go
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package main
import (
"fmt"
"sync"
)
func main() {
data := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
result := MapReduce(data, Mapper, Reducer)
fmt.Println("Result:", result)
}
func Mapper(item int) int {
return item * 2
}
func Reducer(result []int) int {
sum := 0
for _, item := range result {
sum += item
}
return sum
}
func MapReduce(data []int, mapper func(int) int, reducer func([]int) int) int {
numWorkers := 4
var wg sync.WaitGroup
dataChannel := make(chan int)
resultChannel := make(chan int)
for i := 0; i < numWorkers; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for item := range dataChannel {
mapped := mapper(item)
resultChannel <- mapped
}
}()
}
go func() {
defer close(resultChannel)
results := []int{}
for mapped := range resultChannel {
results = append(results, mapped)
}
result := reducer(results)
resultChannel <- result
}()
go func() {
for _, item := range data {
dataChannel <- item
}
close(dataChannel)
}()
go func() {
wg.Wait()
close(resultChannel)
}()
result := <-resultChannel
return result
}