This is nothing to do with arrays but how sort processes it's arguments, which is lexically (as opposed to numerically as you were expecting). Here's the relevant paragraph from the sort docs 
sort SUBNAME LIST
sort BLOCK LIST
sort LIST

[download]
    Sorts the LIST and returns the sorted list value.
    If SUBNAME or BLOCK is omitted, "sort"s in stan-
    dard string comparison order.  If SUBNAME is spec-
    ified, it gives the name of a subroutine that
    returns an integer less than, equal to, or greater
    than "0", depending on how the elements of the
    list are to be ordered.  (The "<=>" and "cmp"
    operators are extremely useful in such routines.)
    SUBNAME may be a scalar variable name (unsub-
    scripted), in which case the value provides the
    name of (or a reference to) the actual subroutine
    to use.  In place of a SUBNAME, you can provide a
    BLOCK as an anonymous, in-line sort subroutine.

[download]

HTH

_________
broquaint

In reply to Re: array bug? by broquaint
in thread array bug? by sacadura

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.