Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine

comment on

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

Study the following short program and its output:

use strict; sub Foo::bar { print 'called on line ', (caller)[2], ": $_[0]\n" and $_[0]; } my $frobozz = bless \&Foo::bar, 'Foo'; $frobozz->bar('eenie'); $frobozz->bar('eenie')->('meenie'); $frobozz->('eenie'); Foo->bar('eenie'); Foo->bar('eenie')->bar('meenie'); Foo::bar('eenie'); 'Foo'->bar('eenie'); 'Foo::bar'->('eenie'); "Foo'bar"->('eenie'); # Perl trivia # bar('eenie'); # bombs! require Exporter; @Foo::ISA = ('Exporter'); @Foo::EXPORT_OK = ('bar'); Foo->import('bar'); bar('eenie'); __END__
Make sure you understand why each output line is generated (except the one corresponding to the code line marked as "Perl trivia"--that one's optional), and why un-commenting out the line that begins with # bar causes a run-time error. If, after you work through it, something still doesn't make sense, ask.

Note! The above is certainly not an example of good coding. Its only purpose is to illustrate some aspects of Perl.

the lowliest monk

In reply to Re: Writing Modules/namespace polution by tlm
in thread Writing Modules/namespace polution by thekestrel

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 chanting in the Monastery: (2)
As of 2021-08-04 06:52 GMT
Find Nodes?
    Voting Booth?
    My primary motivation for participating at PerlMonks is: (Choices in context)

    Results (41 votes). Check out past polls.