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All the Perl that's Practical to Extract and Report

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  • Write a Perl program with a specific heuristic to take care of it. Something like:
    • Read in all the lines of the file
    • Walk thru the lines finding the one with bind parm 1. That's line $x.
    • Make sure that $line[$x+1] is bind parm 2, or else die because your heuristic isn't right.
    • @line[$x,$x+1] = @line[$x+1,$x];
    • $line[$x] =~ s/2/1/;
    • $line[$x+1] =~ s/1/2/;
    Or thereabouts. Seems to me that you don't need to switch the parms, but rather switch their bind numbers.

    It's a quick throwaway tool, but that's OK that you're going to throw it away. Better yet, keep it in some CVS project (we call ours "lab") that acts as a junk drawer, so you have it later on if you need to do something similar in the future.



    • For a quick throaway tools, one can't beat perl one-liners. Here's one using the regex approach:

      perl -0777 pi.bak -e 's/\(1, ([^\)]+)\)(.*?)\(2, ([^\)]+)\)/(1, $3)$2(2, $1)/gs'

      Disclaimer: Not tested extensively.