A one-liner regex is not the most maintainable or efficient solution to this problem. But since you asked, here's a regex answer:
  
s/((?:^|\|)(?:[^"|]*"[^"|]*")*[^"|]*)"([^"|]*)(?=$|\|)/$1$2/g;

[download]
The readability of that could be improved upon, however:
  
my $T = qr/[^"|]*/;
s/((?:^|\|)(?:$T"$T")*$T)"($T)(?=$|\|)/$1$2/go;

[download]
Now here's how I would have really done it:
  
join '|', map { s/"([^"]*)$/$1/ if y/"// & 1; $_ } split /\|/;

[download]
   MeowChow                                   
               s aamecha.s a..a\u$&owag.print

In reply to (MeowChow) Re: Delete unmatched quotes from a delimited file? by MeowChow
in thread Delete unmatched quotes from a delimited file? by Buckaroo Buddha

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