Many of my scripts process data piped in from STDIN, but often times I want to also run the script with a small amount of data for maintenance or testing. I could just use echo for a few items, but I sometimes forget to pipe and add the data as command-line arguments, until I notice the script is blocking on the missing STDIN. To avoid this, I've been using the following bit of code to easily handle input from either @ARGV OR STDIN: 
my @ids = do { @ARGV || -t STDIN ? @ARGV : <STDIN> };
chomp @ids;

[download]
But recently I noticed for a long-running process it wasn't doing any work until the data was all collected, so I modified the code to process data from STDIN as it's received: 
my $fh;
if (@ARGV || -t STDIN) {
    open $fh, '<', \ join("\n", @ARGV);
}
else { $fh = *STDIN }
while (defined(my $id = <$fh>)) {
    chomp $id;
}

[download]
Is there a better idiom to handle this?
Note: the null filehandle (<>) does not do what I want since I don't want it interpreting @ARGV as a list of filenames to read data.

In reply to Getting data from either ARGV or STDIN by sleet

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.