我可以得到“&"吗?或“-和"在 PowerShell 中工作? [英] Can I get "&&" or "-and" to work in PowerShell?

问题描述

&& 在 Google 搜索上是出了名的难搜索，但我找到的最好的是 这篇文章 说使用 -and.

&& is notoriously hard to search for on Google Search, but the best I've found is this article which says to use -and.

不幸的是，它没有提供更多信息，而且我无法找到我应该用 -and 做什么(同样，这是众所周知的难以搜索的东西).

Unfortunately it doesn't give any more information, and I can't find out what I'm supposed to do with -and (again, a notoriously hard thing to search for).

我试图在其中使用它的上下文是执行 cmd1，如果成功，则执行 cmd2"，基本上是这样的:

The context I'm trying to use it in is "execute cmd1, and if successful, execute cmd2", basically this:

csc /t:exe /out:a.exe SomeFile.cs && a.exe

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如果您只想在一行上运行多个命令，并且不关心第一个命令是否失败，您可以使用 ; 对于我的大多数目的，这很好.

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If you just want to run multiple commands on a single line and you don't care if the first one fails or not, you can use ; For most of my purposes this is fine.

例如:kill -n myapp;./myapp.exe.

推荐答案

在 CMD 中，'&&'表示执行命令1，如果成功，执行命令2".我已经将它用于以下方面:

In CMD, '&&' means "execute command 1, and if it succeeds, execute command 2". I have used it for things like:

build && run_tests

在 PowerShell 中，您可以做的最接近的事情是:

In PowerShell, the closest thing you can do is:

(build) -and (run_tests)

它具有相同的逻辑，但是命令的输出文本丢失了.不过，也许它对你来说已经足够了.

It has the same logic, but the output text from the commands is lost. Maybe it is good enough for you, though.

如果您在脚本中执行此操作，最好将语句分开，如下所示:

If you're doing this in a script, you will probably be better off separating the statements, like this:

build
if ($?) {
    run_tests
}

2019/11/27:&& 运算符现在可用于 PowerShell 7 Preview 5+:

2019/11/27: The &&operator is now available for PowerShell 7 Preview 5+:

PS > echo "Hello!" && echo "World!"
Hello!
World!

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