Hello monks,

I'm looking for some conceptual explanation of why a few things don't work. The code I have is:

my $line1 = <IN>;
chomp($line1);
my @row = split("\t", $line1);

[download]

I naively thought I could make that a little easier to read by doing:

my @row = split("\t", chomp(<IN>));

[download]

Instead I get error messages. The attempt to chomp the file-handle gives this:

Can't modify <HANDLE> in chomp

So after I accepted that and tried just to do:

my $line = <IN>;
my @row = split("\t", chomp($line));
print $row[0];

[download]

I was surprised to still get an error:

Use of uninitialized value in print


Can anyone shed some light on either of those issues: 1) why one can't chomp() a handle, and 2) why I can't use chomp to return an lvalue?

In reply to Chomp(<handle>) by Anonymous Monk

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.