Seems like a query similar to How [to] include a file in Perl script by OP, resulting quite possibly in the same responses.

Forgot to mention earlier ... There can be more reasons for failure to open a file other than a non-existing file: permission errors, running out of file descriptors, and possibly others (that I do not know about). Therefore, instead of ... 

my $file = 'file-name';

if( open(HANDLE, $file) )
{
  ...
}
else
{
  print "No such file or directory\n";
}

[download]

... should use $! (aka $OS_ERROR, $ERRNO) in printing of a message ...

if ( open my $handle, '<', $file )
{
  ...
}
else
{
  print $!, "\n";
  #warn "Cannot open file '$file' to read: $!";
}

[download]

... so that you can have as close to the real reason for open failure as possible.

In reply to Re: How to copy an array to a hash? by parv
in thread How to copy an array to a hash? by Ethen

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.