// Online Go compiler to run Golang program onlinepackage mainimport "fmt"type CharFreq struct {Char runeCount int}func main() {str := "We often will need to manipulate strings in our messaging app For example, adding some personalization by using a customer's name within a template"strMap := make(map[rune]int)strChan := make(chan CharFreq)for _,v := range str{//tolower and space skipif v >= 'A' && v <= 'Z' {v = v+32}if v == ' '{continue}strMap[v]++}go func (){for i,v := range strMap{strChan <- CharFreq{Char:i,Count:v}}close(strChan)}()for itm := range strChan{fmt.Printf("Character: %c, Count: %d\n", itm.Char, itm.Count)}}
