Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

Comment on

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

Here's my typical approach to using Getopt::Long. First I assign a default value to the variables that will be used in GetOptions(). Then I test the values of those variables. If they are acceptable values, proceed. Otherwise, stop and give an error message.

Applied to your question, here's what my (untested) code would look like:

use strict; use warnings; use Getopt::Long; my $debug = ""; GetOptions( 'd=i' => \$debug); if ($debug eq "") { # -d flag was not used } else { if (($debug < 1) && ($debug > 4)) { # -d flag used, but value is not acceptable my $msg = "The value of '$debug' is not valid for -d option.\n"; $msg = "The -d option only accepts the values between 1 and 4.\n" die "$msg"; } }

Might not be the best or more elegant solution, but it should work and it makes sense to me.


In reply to Re: Range in Getopt by dasgar
in thread Range in Getopt by Ammu

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
  • Outside of code tags, you may need to use entities for some characters:
            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 scrutinizing the Monastery: (5)
    As of 2014-09-18 02:53 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      How do you remember the number of days in each month?











      Results (105 votes), past polls