Re^2: Calculating variable {n} in regex match

FWIW:

>perl -wMstrict -le
"my $s = '123 234 3456789 3210 34567';
 ;;
 my @m = $s =~ m{ \b ((\d) (??{ qr{\d{$^N}} })) \b }xmsg;
 print qq{@m};
 ;;
 my $i = 2;
 @m = $s =~ m{ \b (??{ ++$i;  qr{\d{$i}}; }) \b }xmsg;
 print qq{@m};
"
234 2 3210 3
123 3456789
[download]

Comment on Re^2: Calculating variable {n} in regex match Download Code

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Re^3: Calculating variable {n} in regex match by atreyu (Sexton) on Jun 14, 2012 at 14:02 UTC
okay, AnomalousMonk, this works: `# the original number of integers to test (will be one-upped) my $i = 1; # the input string to be tested (a number) my $foo = shift; # see if the input string is a two-digit number my $rc = ($foo =~ m{ \b (??{ ++$i; qr{\d{$i}}; }) \b }xmsg) ?'Y' :'N';` [download] very clever...thanks.	[reply] [d/l]
Re^4: Calculating variable {n} in regex match by AnomalousMonk (Archbishop) on Jun 14, 2012 at 17:15 UTC
But sometimes cleverness can be a curse, so you may want to reserve your thanks until later.	[reply]