Beefy Boxes and Bandwidth Generously Provided by pair Networks
more useful options

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

I'm just wondering if I discovered some kind of bug, or if I'm actually doing something wrong.

Here's a test script to illustrate.

#!/usr/bin/perl use strict; use warnings; use YAML::Any qw(DumpFile LoadFile); my $yaml_file = 'test-re.yaml'; my @default_patterns = ( qr/^foo.*bar.*baz/i, qr/^bar.*baz.*quux/i, qr/^quux$/, ); my $yaml = {}; if ( -w $yaml_file ) { $yaml = LoadFile( $yaml_file ); } if ( scalar @ARGV ) { push @{$yaml->{patterns}}, qr/$_/ for @ARGV; } else { # If no args, assume we want a fresh pattern dump, seed # with the default list of patterns. # $yaml->{patterns} = []; push @{$yaml->{patterns}}, $_ for @default_patterns; } DumpFile( $yaml_file, $yaml ) or die "Error writing yaml file: $!\n"; print "Wrote $yaml_file\n";

Here's the output from my shell as I use my test script.

$ ls test-re.yaml ls: cannot access test-re.yaml: No such file or directory $ Wrote test-re.yaml $ cat test-re.yaml --- patterns: - !!perl/regexp (?^i:^foo.*bar.*baz) - !!perl/regexp (?^i:^bar.*baz.*quux) - !!perl/regexp (?^:^quux$) $ '^foo$' Wrote test-re.yaml $ cat test-re.yaml --- patterns: - !!perl/regexp (?^:(?^i:^foo.*bar.*baz)) - !!perl/regexp (?^:(?^i:^bar.*baz.*quux)) - !!perl/regexp (?^:(?^:^quux$)) - !!perl/regexp (?^:^foo$) $ '^bar$' Wrote test-re.yaml $ cat test-re.yaml --- patterns: - !!perl/regexp (?^:(?^:(?^i:^foo.*bar.*baz))) - !!perl/regexp (?^:(?^:(?^i:^bar.*baz.*quux))) - !!perl/regexp (?^:(?^:(?^:^quux$))) - !!perl/regexp (?^:(?^:^foo$)) - !!perl/regexp (?^:^bar$) $ '^baz$' Wrote test-re.yaml $ cat test-re.yaml --- patterns: - !!perl/regexp (?^:(?^:(?^:(?^i:^foo.*bar.*baz)))) - !!perl/regexp (?^:(?^:(?^:(?^i:^bar.*baz.*quux)))) - !!perl/regexp (?^:(?^:(?^:(?^:^quux$)))) - !!perl/regexp (?^:(?^:(?^:^foo$))) - !!perl/regexp (?^:(?^:^bar$)) - !!perl/regexp (?^:^baz$)

So, every time I add a single qr quoted pattern to the yaml file, it's like it's nesting everything above it, even though it's not like I'm rerunning the qr quoting on every value in the list.

I discovered this while changing one of my scripts where I'm comparing a value to a list of patterns with the smart match operator: if ( $_ ~~ @patterns )

Also, I didn't think of it til just before I was going to submit this post, I added a line to the test script to display the result of YAML::Any->implementation and it showed YAML::Syck to be the selected version. The problem occurs on perl-5.14.2 with YAML::Syck 1.19 as well as perl-5.16.0 with YAML::Syck 1.20.


In reply to Strange YAML behavior with lists of qr regexp values by naChoZ

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (4)
As of 2022-01-21 09:01 GMT
Find Nodes?
    Voting Booth?
    In 2022, my preferred method to securely store passwords is:

    Results (57 votes). Check out past polls.