Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
From what I can see from the source of Algorithm::LUHN nothing is exported by default:
@EXPORT = qw//; @EXPORT_OK = qw/check_digit is_valid valid_chars/;

so if you wanna import is_valid you need to tell explicitly.

see also How to Export

EDIT

> Is it somehow better to use the second statement if I use only "is_valid" method in my code? Maybe, memory issues or something?

No! No significant memory problems, importing is a kind of aliasing between namespaces.

But you have to care about potential namespace polution, see Selecting What To Export.

Please note that you don't necessarily need to import is_valid, otherwise can also address Algorithm::LUHN::is_valid directly.

Cheers Rolf


In reply to Re: Difference between use Module::Name and use Module::Name qw /method1 method2/ by LanX
in thread Difference between use Module::Name and use Module::Name qw /method1 method2/ by Doctrin

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



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

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

    How do I use this? | Other CB clients
    Other Users?
    Others about the Monastery: (10)
    As of 2015-07-06 08:33 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









      Results (70 votes), past polls