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

comment on

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

To validate number formats, use Regexp::Common::number. [emphasis added]
How are these regular expressions going to help? ... How is a regular expression going to help me accept 4294967295 ... but not 4294967296 ...?
Regexes can help validate number formats, but not, in general, ranges. (It's quite often possible to construct a regex to discriminate a number range, but this is usually more of an academic exercise than a practical solution. Common exceptions are for decimal octet and year/month/day ranges.)

... command-line option --resume-from-line ...

This quote from the OP suggests the user is to enter a simple line number of a file. Are you really dealing with source/data/whatever files of more than 4,000,000,000 (or 18,446,744,073,709,551,615 or, God help us all, 99,999,999,999,999,999,999) lines? If not, what do you care if your Perl is UINT32_MAX or UINT64_MAX? Why not just use a validation test something like
    $n !~ /\D/ && $n < 4_000_000_000
(or some more reasonable upper limit) and be done with it?

Or is your question intended to address a more general case?

Give a man a fish:  <%-{-{-{-<

In reply to Re^3: Reliably parsing an integer by AnomalousMonk
in thread Reliably parsing an integer by rdiez

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!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • 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?

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

    How do I use this? | Other CB clients
    Other Users?
    Others chilling in the Monastery: (5)
    As of 2021-03-02 14:50 GMT
    Find Nodes?
      Voting Booth?
      My favorite kind of desktop background is:

      Results (51 votes). Check out past polls.