Howdy!

Hash keys have no predefined ordering. Any given call to keys() will present the keys as a list which will, at that instant, have an order, but that particular ordering is neither persistent nor stable nor predictable in the face of insertions and deletions. Rapid searching for hash keys has nothing to do with ordering, but rather with the nature of hash functions. Ideally, any given key value hashes to a unique value in the hash that can be found (or the existence of tested for) in constant time. Searching an ordered list is going to be O(log n) or worse.

yours,
Michael

In reply to Re^3: What makes an array sorted and a hash unsorted? by herveus
in thread What makes an array sorted and a hash unsorted? by ikegami

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.