[go-nuts] assign to variables and concurrency

yes, and it probably will, concurrent map modification is very likely
to corrupt the internal structures of the Go hashmap type.

Thanks. How can I get some randomness - I always get {3, 4} and map[1:1
2:2] ?

W dniu środa, 13 listopada 2013 10:06:13 UTC+1 użytkownik Dave Cheney
napisał:

In the playground, the results are always cached.

If you want to see this race, use the race detector.

lucky(~/src) % go run -race race.go
==================
WARNING: DATA RACE
Write by goroutine 4:
   main.func·002()
       /home/dfc/src/race.go:10 +0x65

Previous write by goroutine 3:
   main.func·001()
       /home/dfc/src/race.go:9 +0x5f

Goroutine 4 (running) created at:
   main.main()
       /home/dfc/src/race.go:10 +0x15f

Goroutine 3 (finished) created at:
   main.main()
       /home/dfc/src/race.go:9 +0xf0
==================
{3 4}
Found 1 data race(s)
exit status 66
lucky(~/src) % cat race.go
package main

import "fmt"

func main() {
         done := make(chan bool)
         type T struct{ a, b string }
         var x T
         go func() { x = T{"1", "2"} }()
         go func() { x = T{"3", "4"}; done <- true }()
         <-done
         fmt.Println(x)
}

Many thanks !

W dniu środa, 13 listopada 2013 10:37:31 UTC+1 użytkownik Dave Cheney
napisał: