duguying

// #cgo CFLAGS: -Wall
// #cgo LDFLAGS: -Wl,-rpath="/home/liuliang/ffmpeg-build/lib"
// #cgo LDFLAGS: -L/home/liuliang/workspace/wetrip_ffmpeg_demuxer/Debug
// #cgo LDFLAGS: -L/home/liuliang/workspace/wetrip_ffmpeg_demuxer
// #cgo LDFLAGS: -lwetrip_ffmpeg_demuxer -lstdc++ -ljpeg  -lpthread -lrt
// #cgo LDFLAGS: -L/home/liuliang/ffmpeg-build/lib
// #cgo  LDFLAGS: -lavformat -lavcodec -lswscale -lavutil -lswresample
// #include "test.h"
// #include <stdio.h>
// #include <stdlib.h>

duguying

function main(){
  var buffer bytes.Buffer

  for i := 0; i < 1000000; i++ {
    buffer.WriteString("a")
  }
}

duguying

if you have mkisofs/genisoimage and say your folder is named "ISOTMP"

genisoimage -r -V "ISO-LABEL" -cache-inodes -J -l \
  -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot \
  -boot-load-size 4 -boot-info-table -o NAME-OF-ISO.iso ISOTMP/

mkisofs -r -V "ISO-LABEL" -cache-inodes -J -l \
  -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot \
  -boot-load-size 4 -boot-info-table -o NAME-OF-ISO.iso ISOTMP/

duguying

package main

import (
    "context"
    "net/http"
    "time"
)

func main() {
    cx, cancel := context.WithCancel(context.Background())

duguying

route add 192.168.2.37 mask 255.255.255.255 192.168.1.1 metric 1
route delete 192.168.2.37 mask 255.255.255.255 192.168.1.1 metric 1

# 192.168.1.1 为网关IP
# 192.168.2.37 为网卡IP

duguying

package main

import (
	"crypto/tls"
	"fmt"
	"io/ioutil"
	"net/http"
	"strings"
	"sync"
	"time"

duguying

#!/bin/sh

git log --format='%aN <%aE>' | sort -u > AUTHORS

duguying

package main

import (
	"fmt"
	"os"
	"os/signal"
	"syscall"
)

func main() {

duguying

package main

import (
	"fmt"
	"time"
)

func main() {
	ch1 := make(chan int, 10)
	ch2 := make(chan int, 10)

duguying

package main

import (
	"fmt"
)

func main() {
  // defer 的调用是在当前函数 返回之前；多个defer的调用顺序是反向的
	defer fmt.Println("Fourth")
	panic("exit")