First off, beware the "= vs. eq vs. ==" bug. Remember that = does an assignment, == compares numeric values, and eq compares string values. Having said that, what you're probably looking for is the ternary ?: operator (documented in perlop). I'd write what you're looking for like this:

my %required;
$required{path} = ($ENV{HTTP_HOST} eq 'www.shrum.net') ? 
                  'g:/websites/shrum.net/' : 'd:/users/http/html/';

[download]

Then again, if you have several keys to set, you're probably better off doing:

my %required;
if ($ENV{HTTP_HOST} eq 'www.shrum.net') { # We now know which 
                                          # platform we're on...
    $required{path}         = 'g:/websites/shrum.net/';
    $required{someotherkey} = 'some other string';
}
else {
    $required{path}         = 'd:/users/http/html/';
    $required{someotherkey} = 'some different string';
}

[download]
"One word of warning: if you meet a bunch of Perl programmers on the bus or something, don't look them in the eye. They've been known to try to convert the young into Perl monks." - Frank Willison

In reply to Re: How do I...Conditional hash value by myocom
in thread How do I...Conditional hash value by S_Shrum

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.