Improve wording & code readability of xargs
I've also un-squished flags & their arguments to avoid confusion.pull/130/head
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# Find all file names ending with .pdf and remove them
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# xargs
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# Build and execute command lines from standard input
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# Find all file names ending with .pdf, then remove them.
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find -name \*.pdf | xargs rm
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# The above, however, is preferable written without xargs:
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# The above, however, is better-written without xargs:
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find -name \*.pdf -exec rm {} \+
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# Or, for find's own functionality, it's best as:
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# Although it's best to use find's own functionality, in this situation.
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find -name \*.pdf -delete
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# Find all file name ending with .pdf and remove them
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# (bulletproof version: handles filenames with \n and skips *.pdf directories)
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# -r = --no-run-if-empty
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# -n10 = group by 10 files
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find -name \*.pdf -type f -print0 | xargs -0rn10 rm
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# Find all file names ending with '.pdf' and remove them. This approach also
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# handles filenames with '\n' and skips '*.pdf' directories. The xargs(1) flag
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# `-r` is equivalent to `--no-run-if-empty`, and the use of `-n` will in this
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# case group execution by 10 files.
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find -name \*.pdf -type f -print0 | xargs -0 -r -n 10 rm
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# If file name contains spaces you should use this instead
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find -name \*.pdf | xargs -I{} rm -rf '{}'
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# If file names may contains spaces, you can use the xargs(1) flag `-I` and its
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# proceeding argument to specify the filename placeholder, as in find(1)'s use
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# of `{}` in `-exec`. Although find(1)'s `{}` needs not be cuddled by quotes, -
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# xargs(1) does.
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find -name \*.pdf | xargs -I {} rm -r '{}'
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# Will show every .pdf like:
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# &toto.pdf=
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# &titi.pdf=
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# -n1 => One file by one file. ( -n2 => 2 files by 2 files )
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find -name \*.pdf | xargs -I{} -n1 echo '&{}='
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# The above is, however, much faster and easier without xargs:
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find -name \*.pdf -printf "%p\n"
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# Print a list of files in the format of `*FILE=`. The use of xargs(1) flag
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# `-n` here with its argument of `1` means to process the files one-by-one.
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find -name \*.pdf | xargs -I {} -n 1 echo '&{}='
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# The above is, however, much faster, more efficient, and easier without xargs.
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find -name \*.pdf -printf '&%f=\n'
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# Group words by three in a string
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seq 1 10 | xargs -n3
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# Group words by three in a string.
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seq 1 10 | xargs -n 3
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# Alternatively, and more efficiently, use Bash brace expansion, if available.
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printf '%d ' {1..10} | xargs -n 3
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