While waiting for the speculated "defined" version of "||", I wrote def -- Deal nicely with undefined values. That simplifies your second case:     $foo = def( $bar, $default_for_foo ); Throwing together something for exists I came up with this:     $a = has( a=>$hashref, $default_for_a ); I replaced $foo with $hashref in my example above.

Here is what has() looks like: 

sub has {
    my( $key, $hv, $val, $force )= @_;
    if(  exists $hv->{$key}  ) {
        $val= $hv->{$key};
    } elsif(  ! defined wantarray  ||  $force  ) {
        $hv->{$key}= $val;
    }
    return $val;
}

[download]
Petruchio has been talking about creating a module to provide fairly simple tools like this that allow you to replace idiomatic constructs with simpler (more natural) constructs. I'll think has() and def() are worth including. (:

        - tye (but my friends call me "Tye")

In reply to (tye)Re: Effecient shortcut for ?: by tye
in thread Effecient shortcut for ?: by traveler

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.