Files
learning-go-for-sre-interview/10-gotchas/ex08-map-race/main.go
T
kacerrandClaude Fable 5 7219eb5a23 Initial commit: Go SRE interview exercises
Includes solved 02-worker-pool and 09-safe-counter (mutex, atomic, sharded).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GbnJj9ZqEx9nUvzkjdwfMq
2026-08-28 22:18:09 +02:00

23 lines
419 B
Go

// PREDICT: what happens? Can recover() save you? Run it a few times.
// Then run with: go run -race .
package main
import (
"fmt"
"time"
)
func main() {
defer func() {
if r := recover(); r != nil {
fmt.Println("recovered:", r) // will this ever print?
}
}()
m := make(map[int]int)
for i := 0; i < 100; i++ {
go func(i int) { m[i] = i }(i)
}
time.Sleep(200 * time.Millisecond)
fmt.Println(len(m))
}