for {}和for i = 0之间的差异； i ++ {}进入
I am currently learming Go. I am readging the book An Introduction to programming in go
I am at the concurrency section and form what I understand I can see two way to define an infinite loop a go program.
func pinger(c chan string) {
for i := 0; ; i++ {
c <- "ping"
}
}
func printer(c chan string) {
for {
msg := <- c
fmt.Println(msg)
time.Sleep(time.Second * 1)
}
}
I am wondering what is the use of the i variable in the pinger function. What is the best "go" way to declare an infinite loop ? I would say the the one in the printer function is better but as I am new to I might miss something with the declaration in the pinger function.
Thanks for all people who will help.
The i in the first loop is redundant; it's always best to get rid of unused variables therefore You should use a for{} in the pinger() function as well.
Here is a working example:
package main
import(
"time"
"fmt"
)
func main() {
c := make(chan string)
go printer(c)
go pinger(c)
time.Sleep(time.Second * 60)
}
func pinger(c chan string) {
for{
c <- "ping"
}
}
func printer(c chan string) {
for {
msg := <- c
fmt.Println(msg)
time.Sleep(time.Second * 1)
}
}
The "best" way is to write code that is easy to read and maintain. Your variable i in func pinger serves no purpose and someone stumbling upon that code later on will have a hard time understand what it's for.
I would just do
func pinger(c chan string) {
for {
c <- "ping"
}
}