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POCommand line perl regex to find dangling Javascript commas
 

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  1. POCommand line perl regex to find dangling Javascript commas
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    <p>Hello I'm seeking a Perl one-liner if possible, to scan all of our Javascript files, to find so-called "rogue commas". That is, commas that come at the end of an array or object data structure, and therefore commas that come immediately before either an ']' or '}' character.</p> <p>The main challenge I'm encountering is how to make the regex that checks for ] or } non-greedy. The regex needs to span multiple lines, since the comma could end one line, followed by the } or ] on the next line, but I've figured out how to do that with the help of the book Minimal Perl.</p> <p>Also, I'd like to be able to pipe a number of files to this Perl regex (via find/xargs), and so I'd like to print the name of the input file, and the line number within that file.</p> <p>Below are various attempts of mine that are not particularly close to working straight from my bash history. Thanks in advance:</p> <pre><code>find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/,\s+$/ and print $_;' find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/,\s+/ and print $_;' find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/,\s+\]/ and print $_;' find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/,\s+[\]\}]/ and print $_;' find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/,\s+[\]\}]/ and print $_;' | wc -l find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/,\s+[\]\}]/ and print $_;' | wc -l find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/,\s+}/ and print $_;' | wc -l find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/,\s+}?/ and print $_;' | wc -l find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/,\s+}+?/ and print $_;' | wc -l find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/,$/' and print $_;' find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/,$/ and print $_;' find winhome/workspace/SsuExt4Zoura/quotetool/js -name "*.js" | xargs perl -00 -wnl -e '/\,$/ and print $_;' </code></pre>
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    1. USGeorge Jempty
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    1. COmight be a good candidate for server fault.
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      1. POCommand line perl regex to find dangling Javascript commas
      1. USDenis de Bernardy
    2. COWhat’s wrong with having a final comma? That makes it easy to add more elements.
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      1. UStchrist
    3. COPerhaps you should mention why these attempts are not working.
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      1. USTLP
 

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