batch_snippets.cmd

:helper_removeOutQuotes
SETLOCAL ENABLEDELAYEDEXPANSION
set variableName=%1
set variableValue=!%variableName%!
set "variableValue=!variableValue:~1,-1!"
endlocal & call Set "%~1=%variableValue%"
goto:eof

rem eg: call :helper_getEchoedValue !cmd! result
:helper_getEchoedValue
setlocal ENABLEDELAYEDEXPANSION
set cmd=%1
rem remove added quotes
call:helper_removeOutQuotes !cmd!
rem escape pipes
set "cmd=!cmd:|=^|!"
rem execute command
for /F "delims= " %%A in ( '!cmd!' ) do call:helper_getNonNullValue %%A value
endlocal & set %~2=%value%
goto:eof

:helper_getNonNullValue
if not [%1]==[] set %~2=%1
goto:eof

rem eg: call :helper_countdown 5 "message"
:helper_countdown
setlocal enableextensions enabledelayedexpansion
set num_second=%~1
set message=%~2
for /f %%a in ('copy /Z "%~dpf0" nul') do set "CR=%%a"
FOR /L %%p IN (%num_second%,-1,1) DO (
    <nul set /p"=%%p %message%..!CR!"
    ping 192.0.2.1 -n 1 -w 1000 >nul
)
goto:eof