The origin of perl was as a sysadmin tool, and in other situations where people frequently wanted results quickly, and might tolerate a few aberrations if they got the bulk of the results.

If you want to run a nuclear power plant, or a 747, definitely, validate your inputs.

If your boss wants you to extract some information from the web logs to see how soon the current heavy load will bring down the web site, take advantage of the fact that '123xyz' in a numeric context is treated as the number 123.

As Occam said: Entia non sunt multiplicanda praeter necessitatem.

In reply to Re: Parameter validation for numeric function arguments? by TomDLux
in thread Parameter validation for numeric function arguments? by janert

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!
  • 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, details, 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, summary, 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.