任何理由分裂＆QUOT; CD＆QUOT;在Windows命令？ [英] Any reason to split up "cd" commands in Windows?

问题描述

我清理一些旧的Windows批处理文件在工作，并保持看到线路是这样的：

  D：
光盘\\
一些CD \\其他\\路径\\
 

没有任何理由（与command.com兼容性也许？）不只是写为

  CD / D D：\\一些\\其他\\路径\\
 

解决方案

CD 实际上并没有改变工作驱动器;它不仅改变了的该驱动器的工作目录的。这就是为什么它打破了这种方式。

一个例子可能有所帮助：

  C：\\用户\\大卫＆GT; CD D：\\一些\\路径
C：\\用户\\大卫＆GT;
 

请注意该驱动器并没有改变。

  C：\\用户\\大卫＆GT; D：
D：\\一些\\路径＆GT;
 

现在D：是工作盘，工作目录更改为你所指定的previously。

正如您所指出的， CD / D 将两者都做。 [更新：我一定是错过了 /天读你原来的职位:(当 - 对不起]

我相信你是正确的 - 有没有好的理由不使用单行 - 比COMMAND.COM（我敢pretty兼容性等肯定不支持 /天开关）。出于这个原因，我总是创造我的脚本文件使用的.cmd 扩展，如果他们依赖于COMMAND.COM不支持的功能。

有一个更好的选择恕我直言，是使用 PUSHD 这行为就像 CD / D - 也给你能够回去，无论你是之前（通过 POPD ）。你甚至可以 PUSHD 来UNC路径（ \\\\服务器\\共享）和Windows将创建一个临时驱动器号您。 （虽然我今天上午才发现功能，并且我运行的Win 7专业版，所以我不知道它是否可以在旧版本和/或家庭版）。

I'm cleaning up some old Windows batch files at work, and keep seeing lines like this:

D:
cd\
cd some\other\path\

is there any reason (compatibility with command.com maybe?) to not just write this as

cd /d d:\some\other\path\

解决方案

cd doesn't actually change the working drive; it only changes the working directory for that drive. That's why it's broken up that way.

An example might help:

C:\users\david>cd D:\some\path
C:\users\david>

Note the drive hasn't changed.

C:\users\david>D:
D:\some\path>

Now that D: is the "working disk", the working directory is changed to what you specified previously.

As you point out, cd /d will do both. [UPDATE: I must have missed the /d when reading your original post :( -- sorry]

I believe you're correct -- there's no "good" reason not to use the one-liner -- other than compatibility with COMMAND.COM (which I'm pretty sure doesn't support the /d switch). For this reason, I always create my script files with a .cmd extension if they depend on features not supported in COMMAND.COM.

A better alternative IMHO is to use pushd which behaves like cd /d -- and also gives you the ability to go back to wherever you were before (via popd). You can even pushd to a UNC path (\\server\share) and Windows will create a temporary drive letter for you. (Although I only found that feature this morning, and I'm running Win 7 Pro, so I'm not sure if it's available on older versions and/or Home editions.)

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