goStudy.txt

1、Linux系统下的环境变量：
使用export查看，PATH中需要包含go程序的文件路径；GOPATH为当前Go的工作路径；GOROOT为Go的程序包路径

2、定义全局常量数组 or 切片：
var maskbit = []byte{0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}

3、定义常量：
const (
    PtreeIPv4 = 1
    PtreeIPv6 = 2
)

4、使用多返回值函数：
func (t *Ptree) PrintIPv4(f func(interface{})) (totalNode, totalInfo uint32) {
    var node *PtreeNode
    var nodeNum, infoNum uint32
    for node = t.GetRoot(); node != nil; node = node.PtreeNodeNext() {
        infoNum += node.ptreeNodePrintIPv4(f)
        nodeNum++
    }
    fmt.Printf("TotalNode:%d,TotalInfo:%d\n", nodeNum, infoNum)
    return nodeNum, infoNum
}


5、使用GDB调试：
go build -gcflags "-N -l"

6、使用interface{}类型的强转：
func (t *Ptree) PrintIPv4(f func(interface{})) (totalNode, totalInfo uint32) {
    var node *PtreeNode
    var nodeNum, infoNum uint32
    for node = t.GetRoot(); node != nil; node = node.PtreeNodeNext() {
        infoNum += node.ptreeNodePrintIPv4(f)
        nodeNum++
    }
    fmt.Printf("TotalNode:%d,TotalInfo:%d\n", nodeNum, infoNum)
    return nodeNum, infoNum
}
func printPrefix(info interface{}) {
    prefix := info.([]byte)
    fmt.Println(prefix)
}
nodeNum, infoNum := table.PrintIPv4(printPrefix)