... filter out undefined values ... [emphasis added]

My take is that keys with undefined values (either because non-existent or undef) are to be filtered out. One way: 

c:\@Work\Perl\monks>perl -wMstrict -MData::Dump -le
"my %args = ('profile' => 'foo',  'xyzzy' => undef,  'status' => 0);
 my %ta =
   map { defined $args{$_} ? ($_ => $args{$_}) : () }
   qw(profile  password  xyzzy  status)
   ;
 dd 'filtered', \%ta;
 dd 'original', \%args;
"
("filtered", { profile => "foo", status => 0 })

("original", { profile => "foo", status => 0, xyzzy => undef })

[download]

Give a man a fish:  <%-{-{-{-<

In reply to Re: Consise way to filter out keys with undef values from a hash slice? by AnomalousMonk
in thread Consise way to filter out keys with undef values from a hash slice? by nysus

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.