require returns true on success,

yes, and false (undef) otherwise. That was the idea :)

string-eval eats memory

Why would that be (in this case, where the string is just a few bytes)?  Any tests/data to prove the claim? 

C:\>perl -e"print require CGI;"
1
C:\>perl -e"print require CGIshamalamadingdong;"
Can't locate CGIshamalamadingdong.pm in @INC

[download]

Not sure what this is meant to demonstrate — I thought we were talking about eval "require ...": 

$ perl -E '$ok = eval "require CGI" ? 1:0; say $ok'
1
$ perl -E '$ok = eval "require CGIshamalamadingdong" ? 1:0; say $ok'
0

[download]

(note: swap single and double quotes if you're on Windows)

In reply to Re^3: disable functions if module not installed by almut
in thread disable functions if module not installed by lepetitalbert

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.