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User Questions
Passing a value to Mojo::Template template
1 direct reply — Read more / Contribute
by Anonymous Monk
on Apr 14, 2021 at 12:49
    Hi Monks!

    Trying to pass a variable value to the template from the Perl file:
    From the .ep file:
    <div> Number<%= $data->{ box } %> Test: <%= $test %> </div>

    The Perl file:
    ... my $mt = Mojo::Template->new( vars => 1, auto_escape => 1 ); my $data = ... # Not where the issues is. my $code = "PERL"; print $q->header( -charset => 'utf-8' ), $mt->render_file( myfile.html +.ep, { data => $data }, { test => $code } ); ...

    I am getting this error:
    Global symbol "$test" requires explicit package name at myfile.html.ep

    Cant get why, is there a better way of doing this?
    Thanks for taking a look!
Crypt-Random-Source: 0.14 fails to install
1 direct reply — Read more / Contribute
by chandantul
on Apr 14, 2021 at 09:02

    Hello All, I am getting the following error Crypt-Random-Source: 0.14 fails to install while installing OIDC::Lite. I am in Windows 10 platform

    Please check below errors

    t/sugar.t .............. 1/? Undef did not pass type constraint "Class +Name" (in $self->{"weak_source"}) at (eval 121) line 17 "ClassName" is a subtype of "Str" "Str" is a subtype of "Value" "Value" is a subtype of "Defined" Undef did not pass type constraint "Defined" (in $self->{"weak_sou +rce"}) "Defined" is defined as: (defined($_)) # Tests were run but no plan was declared and done_testing() was not s +een. # Looks like your test exited with 255 just after 3. t/sugar.t .............. Dubious, test returned 255 (wstat 65280, 0xff +00) All 3 subtests passed Test Summary Report ------------------- t/factory.t (Wstat: 65280 Tests: 1 Failed: 0) Non-zero exit status: 255 Parse errors: No plan found in TAP output t/sugar.t (Wstat: 65280 Tests: 3 Failed: 0) Non-zero exit status: 255 Parse errors: No plan found in TAP output Files=7, Tests=17, 4 wallclock secs ( 0.11 usr + 0.09 sys = 0.20 CP +U) Result: FAIL Lockfile removed. ETHER/Crypt-Random-Source-0.14.tar.gz C:\Strawberry\perl\bin\perl.exe ./Build test -- NOT OK //hint// to see the cpan-testers results for installing this module, t +ry: reports ETHER/Crypt-Random-Source-0.14.tar.gz Stopping: 'install' failed for 'Crypt::Random::Source'. Failed during this command: ETHER/Crypt-Random-Source-0.14.tar.gz : make_test NO

    Can you please help to fix?

Breaking symmetry with a regex
6 direct replies — Read more / Contribute
by Anonymous Monk
on Apr 13, 2021 at 18:50

    I have a string that has the form 'a:b:' where 'a' and 'b' are both numbers. How do I drop the second colon, or convert it to // ?

Should I use v5.10 because of named groups?
5 direct replies — Read more / Contribute
by hrcerq
on Apr 13, 2021 at 18:11

    Hello again.

    I've got a script that uses named capture groups to parse file records. The record format is always the same (four fields wide, colon separated), just like a passwd file (except for the number of fields).

    For example:

    0:1:bob:Bob
    1:1:bob:Bob
    1:0:alice:Alice
    

    You get the idea. At first I used to split it, but later I came to the conclusion that using a regex with named groups could provide a more understandable code. The (simplified) example below might help you get the picture.

    if (/^(?<type>[01]):(?<valid>[01]):(?<name>[^:]+):(?<comment>[^:]+)$/) + { print "Key name: ", $+{name}, "\n"; print "Key Comment: ", $+{comment}, "\n"; print "Not valid\n" unless $+{valid} || !$+{type}; } else { print "Malformed input: $_\n"; }

    Now, I've noticed (according to perlretut) that named capture groups were introduced in Perl 5.10. I don't expect the script to run in older versions, but would it be wise to use v5.10 pragma?

    Would it have any unwanted side effects? I'm not using any of the features of the bundle, just wanted to state that version 5.10 is required. Is that a good idea?

printing metadata Tag using ExifTool
1 direct reply — Read more / Contribute
by g_speran
on Apr 13, 2021 at 15:24

    Hello Perl Monks

    I am trying to use ExifTool to extract some Metadata TAGS. I've searched for a specific use case but was unsuccessful. Ive constructed some simple code to accomplish what I am trying to do, but I am looking for verification that I am doing it correctly to extract the necessary variables or is there a simpler way.

    use Image::ExifTool qw(:Public); use Data::Dumper; $file='d:/60486581538__715F9238-09E5-4806-8146-0626DAFB0E36.JPG'; $ExifTool = new Image::ExifTool; #$ExifTool->Options(DateFormat => '%Y-%m-%d'); $info = $ExifTool->ImageInfo($file,'SubSecCreateDate','LensModel'); #$info = $ExifTool->ImageInfo($file); print "INFO: $info\n"; $createdate=$$info{'SubSecCreateDate'}; $lens=$$info{'LensModel'}; print "\nCreate Date: $createdate\n"; print "Lens Model: $lens\n\n"; print Dumper($info); exit; D:\>metadata.pl INFO: HASH(0x2b9f148) Create Date: 2020:03:02 13:16:55.336-05:00 Lens Model: iPhone 7 back camera 3.99mm f/1.8 $VAR1 = { 'LensModel' => 'iPhone 7 back camera 3.99mm f/1.8', 'SubSecCreateDate' => '2020:03:02 13:16:55.336-05:00' }; D:\>
XML::XPath matching different file extension
1 direct reply — Read more / Contribute
by Anonymous Monk
on Apr 13, 2021 at 11:27
    Hi there Monks!

    I have this line in my code and I am trying to see if there is a way to add more than one file match in this line, the files comes as "*.txt", "*.TXT", "*.png", "*.PNG".
    It breaks if in this line the file extension is "*.TXT" instead of "*.txt".
    my @files = $zip->membersMatching( '.*\.txt' );

    Thanks for looking!
Useless use of string in return statement
7 direct replies — Read more / Contribute
by Bod
on Apr 12, 2021 at 19:06

    Is there something strange about the way return treats conditions?

    I have this and it doesn't work as expected...

    sub get_ids { my ($self, %attrs) = @_; # Do stuff... my %result; # $result{'message'} = ''; if ($self->{'error'}) { $result{'status'} = 'error'; $result{'message'} = $self->{'error'}; } else { $result{'status'} = 'success'; $result{'api-key'} = $self->{'api-public'}; $result{'session'} = $intent_id; } return encode_json(\%result) if lc($attrs{'format'}) eq 'json'; return $result{'message'} or "$result{'api-key'}:$result{'session' +}"; # <- line 229 return "SOMETHING"; }
    If it is called as get_ids( 'format' => 'json' ); it works fine but asking it to return a text string returns undef and warns Useless use of string in void context at line 229. The way I think it should work is that if $result{'message'} evaluates as true, that will get returned but if it evaluates as false then "$result{'api-key'}:$result{'session'}" wil be returned instead.

    Can you explain why this is not behaving as expected?

    As an aside, in searching for an answer I found this post -> Useless use of string in void context
    There it is suggested that Perl reports the wrong line number for this warning so it is quite possible that I'm actually looking in the wrong place!

Strange behavior in File::Find (stopped working for no reason)
2 direct replies — Read more / Contribute
by pvaldes
on Apr 12, 2021 at 12:40

    I'm perplexed. Can you tell me what is wrong with this script?

    #!/usr/bin/perl -w use strict; use warnings; use diagnostics; use File::Find; open (my $t, '>', '/home/myuser/myfilename.sql') or die $!; print $t "blah blah\n"; find( { preprocess => \&hi, wanted => \&work, postprocess => \&bye, fo +llow_skip => 1 }, "."); sub hi { print $t "hi\n"; return;} # works correctly sub bye { print $t "bye\n"; return;} # works correctly sub work { print "my name is: ", $File::Find::name; print $t "I'm a file!"; return;} close $t;

    when I run the script in the current tree directory I would expect a list of filenames being printed in screen and a text file containing:

    blah blah hi I'm a file!I'm a file!I'm a file!... etc bye

    But what I have is: "my name is: ." or "my name is: 1" and a file containing:

    blah blah hi bye I'm a file! <-yep, solitary and in the wrong position

    libfile-find-wanted-perl/testing,testing,now 1.00-1.1 all installed, automatic

    Can somebody tell me what is happening here? Is not a little late for an 1-April Joke?

LinkedIn module
1 direct reply — Read more / Contribute
by Bod
on Apr 12, 2021 at 08:07

    Searching CPAN I was rather surprised that the only general modules for connecting to LinkedIn seem to be WWW::LinkedIn and Net::Linkedin::OAuth2 - both of these date from before Microsoft acquired LinkedIn 5 years ago...unbelievable that it is that long ago!

    Since the 5th April, Hootsuite have reduced the number of scheduled posts permitted on free accounts down to just 5 and we don't use the other features to warrant the paid price tag. We already have an automated Twitter scheduler and I want to add LinkedIn to it so just need something to authenticate, read the timestamp of the latest post and be able to create a post containing media.

    Before I write something to do this, are there any modules available or should I try out the modules above despite their age?

Pushing hash ref onto array ref
2 direct replies — Read more / Contribute
by Bod
on Apr 11, 2021 at 18:18

    A module I am creating has a blessed hash ref as is common. One of the hashes is a reference to an array of anonymous hashes created like so:

    sub new { my $class = shift; my %attrs = @_; my @products = ({ 'id' => 0, 'name' => 'Test', 'description' => 'Some test data', 'qty' => 1, 'price' => 1000, }); $attrs{'trolley'} = \@products; return bless \%attrs, $class; }
    Later on I want to push another anonymous hash onto @products.

    What is the best way to do this?
    Both of these push lines appear to work identically in testing

    sub add_product { my ($self, $product_data) = @_; # create $new_product hasfref push $self->{'trolley'}, $new_product; push @{$self->{'trolley'}}, $new_product; }
    However, I suspect there is some subtle difference between the two which might trip me up in the future!

    Is there a practical difference and is there a 'best' option to use?


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