Sure you can, but that's not what your code does. If you want to sort column 16, you will first have to select the 16th column entirely, before you can sort it. So you would do:
  1. Open your input file.
  2. Read it, line by line. Extract column 16, push it to an array.
  3. Close your input file.
  4. Sort your array.
  5. Open your output file.
  6. Write your sorted array.
  7. Close your output file.
What you certainly can't do is reading the input one line at a time, writing something for each line, and then expect the entire thing to be sorted when you're done.

In reply to Re^3: useless use of sort??? by Anonymous Monk
in thread useless use of sort??? by drock

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.