summaryrefslogtreecommitdiff
path: root/go/parallel-letter-frequency/parallel_letter_frequency.go
blob: e1080b897ce364324c01109673eb75af7d3141ae (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
package letter

import "sync"

func ConcurrentFrequency(s []string) FreqMap {
	c := make(chan rune, len(s))
	wg := sync.WaitGroup{}
	for _, v := range s {
		wg.Add(1)
		go func(s string) {
			for _, r := range s {
				c <- r
			}
			wg.Done()
		}(v)
	}
	go func() {
		wg.Wait()
		close(c)
	}()
	m := FreqMap{}
	for r := range c {
		m[r]++
	}
	return m
}