命令分隔符:

cls & dir
copy a b && echo Success
copy a b || echo Failure

在第二行，&&之后的命令仅在第一个命令成功时运行。

在第3行，||之后的命令仅在第一个命令失败时运行。

当你想在分支之间复制文件时，一个方便的技巧:

C:\src\branch1\mydir\mydir2\mydir3\mydir4>xcopy %cd:branch1=branch2%\foo*
Overwrite C:\src\branch1\mydir\mydir2\mydir3\mydir4\foo.txt (Yes/No/All)? y
C:\src\branch2\mydir\mydir2\mydir3\mydir4\foo.txt

这既使用了%cd%环境变量，也使用了环境变量替换。

输出一个空行:

echo.

变量的延迟展开(为了更好地度量，还加入了子字符串):

    @echo off
    setlocal enableextensions enabledelayedexpansion
    set full=/u01/users/pax
:loop1
    if not "!full:~-1!" == "/" (
        set full2=!full:~-1!!full2!
        set full=!full:~,-1!
        goto :loop1
    )
    echo !full!
    endlocal

FOR命令!虽然我讨厌写批处理文件，但我很感激它。

FOR /F "eol=; tokens=2,3* delims=, " %i in (myfile.txt) do @echo %i %j %k

将解析myfile.txt中的每一行，忽略以分号开头的行，将每行的第2和第3个标记传递给for主体，标记由逗号和/或空格分隔。 注意for语句引用%i获取第二个令牌，引用%j获取第三个令牌，引用%k获取第三个令牌之后的所有剩余令牌。

你也可以用它来遍历目录、目录内容等等…

抽取随机的文本行

@echo off

:: Get time (alas, it's only HH:MM xM

for /f %%a in ('time /t') do set zD1=%%a



:: Get last digit of MM

set zD2=%zD1:~4,1%



:: Seed the randomizer, if needed

if not defined zNUM1 set /a zNUM1=%zD2%


:: Get a kinda random number

set /a zNUM1=zNUM1 * 214013 + 2531011

set /a zNUM2=zNUM1 ^>^> 16 ^& 0x7fff


:: Pull off the first digit

:: (Last digit would be better, but it's late, and I'm tired)

set zIDX=%zNUM2:~0,1%


:: Map it down to 0-3

set /a zIDX=zIDX/3


:: Finally, we can set do some proper initialization

set /a zIIDX=0

set zLO=

set zLL=""


:: Step through each line in the file, looking for line zIDX

for /f "delims=@" %%a in (c:\lines.txt) do call :zoo  %zIDX%  %%a


:: If line zIDX wasn't found, we'll settle for zee LastLine

if "%zLO%"=="" set zLO=%zLL%

goto awdun


:: See if the current line is line zIDX

:zoo


:: Save string of all parms

set zALL=%*


:: Strip off the first parm (sure hope lines aren't longer than 254 chars)

set zWORDS=%zALL:~2,255%


:: Make this line zee LastLine

set zLL=%zWORDS%


:: If this is the line we're looking for, make it zee LineOut

if {%1}=={%zIIDX%} set zLO=%zWORDS%


:: Keep track of line numbers

set /a zIIDX=%zIIDX% + 1

goto :eof




:awdun

echo ==%zLO%==


:: Be socially responsible

set zALL=

set zD1=

set zD2=

set zIDX=

set zIIDX=

set zLL=

set zLO=

:: But don't mess with seed

::set zNUM1=

set zNUM2=

set zWORDS=