recover/panic

package main

import (
    "fmt"
    "runtime"
    "time"
)

func test() {

    defer func() {
        //覆盖panic，将panic输出而不停止程序
        if err := recover(); err != nil {
            fmt.Println("panic:", err)
        }
    }()

    var m map[string]int
    //该map没有make，会报错！
    m["stu"] = 100
}

func calc() {
    for {
        fmt.Println("i‘m calc")
        time.Sleep(time.Second)
    }
}

func main() {
    num := runtime.NumCPU()
    runtime.GOMAXPROCS(num - 1)
    go test()
    for i := 0; i < 2; i++ {
        go calc()
    }

    time.Sleep(time.Second * 10000)
}

recover/panic

原文：http://blog.51cto.com/5660061/2348774