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46 lines
1.3 KiB
Markdown
46 lines
1.3 KiB
Markdown
# xargs Default Command Is echo
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With the `fd` command, all the found files are output line by line like so.
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```bash
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❯ fd '.*.md' --max-depth=1
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CONTRIBUTING.md
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README.md
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TODO.md
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built-in-commands.md
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newsletter.md
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tailwind.md
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```
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I can normalize the whitespace, squishing everything to be separated by single
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spaces by piping it to `xargs`. This is equivalent to call `xargs` with `echo`.
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That is because `echo` is the default command that `xargs` uses when another
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command isn't given.
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```bash
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❯ fd '.*.md' --max-depth=1 | xargs
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CONTRIBUTING.md README.md TODO.md built-in-commands.md newsletter.md tailwind.md
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❯ fd '.*.md' --max-depth=1 | xargs echo
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CONTRIBUTING.md README.md TODO.md built-in-commands.md newsletter.md tailwind.md
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```
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We can see further evidence of that by using the `-n` flag with `2` to have it
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process results two at a time. In either case, each pair of file names is
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echo'd before the next two are processed.
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```bash
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❯ fd '.*.md' --max-depth=1 | xargs -n2
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CONTRIBUTING.md README.md
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TODO.md built-in-commands.md
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newsletter.md tailwind.md
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❯ fd '.*.md' --max-depth=1 | xargs -n2 echo
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CONTRIBUTING.md README.md
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TODO.md built-in-commands.md
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newsletter.md tailwind.md
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```
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See `man xargs` for more details, as well as this [excellent
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article](https://abhinavg.net/2022/06/04/xargs-spaces/).
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