do {$count = () = $s/PATTERN/REPLACEMENT/g; $acc += $count} for @array;

But  s/// returns the number of substitutions made (or the empty string if none), so when list-ified this number (or the empty string) will always be a single-elemment list (update: which in scalar context will always be a  $count of 1), so the  $acc total will always be the number of elements of the  @array array. 

c:\@Work\Perl>perl -wMstrict -le
"my @array = qw(PAT  PATxPATxPAT  PATxPATxPATxPATxPAT  xxxxx);
 ;;
 my $acc;
 do { my $count = () = s/PAT/REP/g;  $acc += $count; } for @array;
 ;;
 print qq{\$acc: $acc   \@array: (@array)};
"
$acc: 4   @array: (REP REPxREPxREP REPxREPxREPxREPxREP xxxxx)

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Give a man a fish:  <%-{-{-{-<

In reply to Re^2: How to count substitutions on an array by AnomalousMonk
in thread How to count substitutions on an array by Anonymous Monk

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