Total Newbie Question: How do I pass a file name as a command line argument? I am currently successfully passing the file name in the Open function: 

#!/usr/bin/perl
use warnings;
use strict;

open(FILE1,"testData.txt ")or die ("Unable to open the file.");

[download]

The above code works great - I can open the file load the data into an array and I'm good to go. The only issue is every time I want execute it against a different data file, I have to edit my Perl code. I'd rather pass the file name at the command line to make things more dynamic.

Again, this feels like a total newbie question (probably because that is my current skill level) but I haven't been able to find much on how to accomplish this. I read through the input \ output tutorials and I'm still in need of help.

Thanks!

In reply to Opening a File from the Command Line by dukea2006

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.