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- @echo off & setlocal enableDelayedExpansion
- set x=Hello World
- set "openLib=( ren "%~nx0" orig-main.bat & ren library.bat "%~nx0""
- set "closeLib=ren "%~nx0" library.bat & ren orig-main.bat "%~nx0" )"
- :main
- cls
- %openLib%
- call :length "%x%" lenX
- %closeLib%
- echo %lenX%
- pause
- exit
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