[ACCEPTED]-Diff without files-diff
You can diff standard input with a file 4 by using the special filename
# diff the contents of the file 'some-file' with the string "foobar" echo foobar | diff - some-file
With bash, you 3 can also use anonymous named pipes (a bit 2 of a misnomer) to diff two pipelines:
# diff the string "foo" with the string "baz" diff <(echo foo) <(echo baz)
See 1 also How can you diff two pipelines with bash?.
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