Meditation are good for meditating - so this thread is teaching me something about refactoring (which is theoretical), and something about tainting (which is practical). This is good for me.

I like very much your solution. In particular, it makes me reflect that an in-place detainting could be dangerous, because I could end up not knowing whether a variable has already been detainted or not. Your approach seems to divide variables into two groups: tainted and not, and this seems reasonable.

I only wonder how readability could be affected by this approach. The detainting method being under the surface, I fear that the naive programmer (er.. me) could be disorientated by seeing such an assignment and seeing $var used in potentially dieing places.

Flavio (perl -e "print(scalar(reverse('ti.xittelop@oivalf')))")

Don't fool yourself.

In reply to Re^3: Writing general code: real world example - and doubts! by polettix
in thread Writing general code: real world example - and doubts! by polettix

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.