没有文件的差异 [英] Diff without files

问题描述

是否可以在没有物理文件的情况下使用 diff工具？像这样的东西：

Is it possible to use the "diff" tool without having physical files? Something like this:

diff "hello" "hell"

推荐答案

您可以使用特殊文件名-：

You can diff standard input with a file by using the special filename -:

# diff the contents of the file 'some-file' with the string "foobar"
echo foobar | diff - some-file

通过bash，您还可以使用匿名命名管道（有点用词不当） ）来比较两个管道：

With bash, you can also use anonymous named pipes (a bit of a misnomer) to diff two pipelines:

# diff the string "foo" with the string "baz"
diff <(echo foo) <(echo baz)

另请参见如何用bash区分两个管道？。

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