getSubStr

getSubStr.bat源码

@echo off

set %0~string=%string%

set %0~position=%position%

set %0~count=%count%

set %0~result=

set string=%1

set /a position=%2

set /a count=0

set string=%string:"=%

if %position% LSS 0 (

for %%i in (%string%) do (

set /a count=!count!+1

)

set /a position=%position%+!count!

)

set /a count=0

for %%i in (%string%) do (

if !count! EQU %position% (

set %0~result=%%i

) 

set /a count=!count!+1

)

set string=!%0~string!

set position=!%0~position!

set count=!%0~count!

使用实例1：

@echo off

Setlocal enabledelayedexpansion

set path=%path%;%cd%\lib

call getSubStr "a,b,c,d" 0

set result=!getSubStr~result!

echo the first subString is %result%

call getSubStr "a;b;c;d" 1

set result=!getSubStr~result!

echo the second subString is %result%

call getSubStr "a b c d" -1

set result=!getSubStr~result!

echo the firest subString from right is %result%

pause