Below is a simple go example. I have omitted error handling etc intentionally to make the example short. I have a simple for loop calling the writeOutput function 5 times using the go keyword to make the function run concurrently.
What I expect to happen is 5 files are created in /tmp/ with the contents of test.
What happens is that no files are created.
However if I remove the go keyword the code executes as expected. Im overlooking something super obvious. My background is dynamically typed languages like PHP/Ruby so just getting to grips with go and can't understand why 5 files are created when the go keyword exists.
package main
import (
"os"
"math/rand"
"strconv"
)
func main() {
for i := 0; i < 5; i++ {
go writeOutput()
}
}
func writeOutput() {
filename := strconv.Itoa(rand.Intn(10000))
file, _ := os.Create("/tmp/" + filename)
defer file.Close()
file.WriteString("test")
}