Re^2: How to match a ;

Actually no. $ matches an end of line, which may be a \n character. Consider:

my $line = ";\n";

print $line =~ /$_/ ? "" : "no ", "match: $_\n" for '^;$', '^;', "^;\\
+z";
[download]

Prints:

match: ^;$
match: ^;
no match: ^;\z
[download]

Note that \z matches the physical end of the string.

Perl's payment curve coincides with its learning curve.

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Re^3: How to match a ; by AnomalousMonk (Archbishop) on Feb 08, 2009 at 10:20 UTC
The `$` regex metacharacter will "[m]atch the end of the line (or before newline at the end)" (emphasis added, perlre section Regular Expressions). In the presence of the /m regex modifier, the behavior of `$` is enhanced.	[reply] [d/l] [select]
Re^3: How to match a ; by ELISHEVA (Prior) on Feb 08, 2009 at 10:29 UTC
I stand corrected, but it was actually '.' and '$' new line behavior I was confusing. I once spent a great deal of time beating my brains out until I figured out that '.' doesn't match `\n` unless you use the 's' modifier, e.g. `/;./s`. But the more I think about it, I also am finding '$' less clearer than I thought, but I'll save those questions for another thread. Best, beth Update 2: removed update 1, appears I still have '$' questions and will need to go to SOPW	[reply] [d/l] [select]
Re^3: How to match a ; by johngg (Canon) on Feb 08, 2009 at 23:13 UTC
I'm puzzled as to why you switched to double quotes and then had to escape the backslash in your third pattern. Sticking to single quotes or using `qw{ ... }` would have obviated that need. `$ perl -le ' > $line = qq{;\n}; > print > $line =~ m{$_} > ? q{} > : q{no }, > qq{match $_} > for q{^;$}, q{^;}, q{^;\z};' match ^;$ match ^; no match ^;\z $ perl -le ' $line = qq{;\n}; print $line =~ m{$_} ? q{} : q{no }, qq{match $_} for qw{ ^;$ ^; ^;\z };' match ^;$ match ^; no match ^;\z $` [download] Cheers, JohnGG	[reply] [d/l] [select]
Re^4: How to match a ; by GrandFather (Saint) on Feb 09, 2009 at 00:41 UTC
In some places I like DWIM, in other contexts I like to be explicit. In this case I thought being explicit about how the \ gets handled was probably a good thing™. Perl's payment curve coincides with its learning curve.	[reply]