中国DOS联盟

@echo off
Setlocal
set _project_a1=a
set _project_a2=a,b
set _project_a3=b,c
set _project_a4=c,a
set _all_a=
set _all_b=
set _all_c=
rem 想实现_all_a记录所有包含a的project，_all_b记录所有包含b的project，_all_c记录所有包含c的project，
rem _all_a=_project_a1,_project_a2,_project_a4
rem _all_b=_project_a2,_project_a3
rem _all_c=_project_a3,_project_a4

rem 不知道如何实现
for /f %%i in ('set _project_') do call :Function1 %%i
echo _all_a=%_all_a%
echo _all_b=%_all_b%
echo _all_c=%_all_c%
endlocal
@goto :eof

:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:Function1
echo %%1=%1
@goto :eof

@echo off&setlocal enabledelayedexpansion
set _project_a1=a
set _project_a2=a,b
set _project_a3=b,c
set _project_a4=c,a
for /l %%a in (1,1,4) do for %%b in (!_project_a%%a!) do if defined _all_%%b (set _all_%%b=!_all_%%b!,_project_a%%a) else set _all_%%b=_project_a%%a
set _project_
set _all_
pause

@echo off&setlocal enabledelayedexpansion
set _project_a1=a
set _project_a2=a,b
set _project_a3=b,c
set _project_a4=c,a
for /f "tokens=1* delims==" %%a in ('set _project_') do for %%c in (%%b) do if defined _all_%%c (set _all_%%c=!_all_%%c!,%%a) else set _all_%%c=%%a
set _project_
set _all_
pause

@echo off
set _project_a1=a
set _project_a2=a,b
set _project_a3=b,c
set _project_a4=c,a
for /f "tokens=2* delims==_" %%a in ('set _project_') do for %%c in (%%b) do if defined _all_%%c (call set _all_%%c=%%_all_%%c%%,%%a) else set _all_%%c=%%a
set _project_
set _all_
pause