[文本处理] 批处理如何删除前两段相同的重复ip地址只保留最先/首次/第一个出现的那个ip

@echo off
for /f "tokens=1,2* delims=." %%i in ('more +8 "%~f0"') do (
	if not defined #%%i%%j echo;%%i.%%j.%%k
	set #%%i%%j=1
)
pause & exit /b
复制代码

@if (0)==(0) echo off
cscript //nologo //e:jscript "%~f0" < 1.txt
pause & exit
@end

var reg = /^(\d+\.\d+)\.\d+\.\d+$/mg;
var s = WSH.StdIn.ReadAll(), map = [];
while(arr=reg.exec(s)){if(!map[arr[1]]){map[arr[1]]=1; WSH.Echo(arr[0])}}
复制代码

@echo off
PowerShell -c "type 1.txt | group {$_ -replace '\d+\.\d+$'} | %%{$_.Group[0]}"
pause
复制代码

gawk -F"." "!a[$1\".\"$2]++" 1.txt
复制代码