[文本处理] 批处理如何按前面数字从小到大排列并删除重复行？

@echo off
for /f "tokens=1* delims=-" %%b in (list.txt) do set _#%%b=%%b---%%c
>new.txt (for /f "tokens=1* delims==" %%b in ('set _') do echo %%c)
new.txt
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@ECHO OFF
Setlocal enableDelayedExpansion
for /f "tokens=*" %%i in ('sort 123.txt') do (
	set a=0
	for /f "tokens=*" %%j in (123.txt) do (
		if %%i==%%j set /a a+=1
	)
		if !a!==1 set b=1
		if !b!==1 echo %%i
		if !a! geq 2 (
			set /a c+=1
		)
		if !c!==1 echo %%i
		if !c!==!a! set c=0
)
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