title: Golang实现Grep功能
date: 2023-02-01 22:40:27.0
updated: 2023-02-01 22:40:27.0
url: https://liumou.site/doc/601
categories:

• GO
  tags:

• Go

效果

源码

package main

import (
    "fmt"
    "regexp"
    "strings"

    "gitee.com/liumou_site/gbm"
)

func Grep(txt, sub string) []string {
    var res string

    re := "(.*)" + sub + "[^s]*"

    c, err := regexp.Compile(re)
    if err != nil {
        panic(err)
    }
    TxtSp := strings.Split(txt, "\n")
    for _, v := range TxtSp {
        tmp := c.FindAllString(v, -1)
        if len(tmp) > 0 {
            res = res + tmp[0] + "\n"
        }
    }
    r := strings.Split(res, "\n")
    return gbm.SliceRemoveNull(r)
}
func main() {
    txt := `Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
    default         JDBoxV3.lan     0.0.0.0         UG    600    0        0 wlo1
    10.1.1.0        0.0.0.0         255.255.255.0   U     600    0        0 wlo1
    172.17.0.0      0.0.0.0         255.255.0.0     U     0      0        0 docker0
    172.18.0.0      0.0.0.0         255.255.0.0     U     0      0        0 br-bb1893ff49af
    172.19.0.0      0.0.0.0         255.255.0.0     U     0      0        0 br-823a20cdeae2
    192.168.100.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr1
    `
    r := Grep(txt, "172")
    for i, v := range r {
        fmt.Println(i, v)
    }
}