in reply to bash loop passing to perl command line

Do not enclose the variable to be expanded into single quotes: 
for i in 1 2 3 4 5 6 7 10 11 12 ; do
  perl -lane 'print p'$i'. "\t$_"' p$i.chr7.miRNA.txt
done

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Re^2: bash loop passing to perl command line
by ikegami (Patriarch) on Oct 27, 2011 at 05:31 UTC

    Drop out of single quotes: 

    for i in 1 2 3 4 5 6 7 10 11 12 ; do
  perl -lane'print "p'$i'\t$_"' p$i.chr7.miRNA.txt
done

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    Or use double quotes: (Don't forget to escape what needs to be escaped.) 

    for i in 1 2 3 4 5 6 7 10 11 12 ; do
  perl -lane"print qq{p$i\\t\$_}" p$i.chr7.miRNA.txt
done

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    Or pass it as an argument: 

    for i in 1 2 3 4 5 6 7 10 11 12 ; do
  perl -lane'BEGIN { $i = shift(@ARGV); }
    print "p$i\t$_"' $i p$i.chr7.miRNA.txt
done

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