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join: add stdin example (#8416)

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* join: add '-' file from standard input
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yunlang 2022-10-02 21:51:08 +08:00 • committed by GitHub
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pages/common/join.md
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@ -18,3 +18,7 @@
- Produce a line for each unpairable line for file1: - Produce a line for each unpairable line for file1:
`join -a {{1}} {{file1}} {{file2}}` `join -a {{1}} {{file1}} {{file2}}`
- Join a file from stdin:
`cat {{path/to/file1}} | join - {{path/to/file2}}`