Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

I do think that I understand what the notion was ... and it really does come down to just how many values are present to be looked-through; not what the domain of possible values is.   Which the OP, as far as I read, does not say.

Is “a sparsely-populated set” 10,000 entries, 100,000 or 100 million?   It makes a gigantic difference.   How many actual entries (regardless of the possible domain of values they could take) are there, and how are they going to be retrieved?   Is it ever necessary to iterate through them, or is it pure random-access?   How often do insertions happen and how do they happen?

You do like to pull “everybody else’s idea is fantastically worse than mine,” e.g. “25 days vs. 1.3 seconds” but, honestly, I don’t think anyone seriously benefits from such outlandish comparisons.   Hash tables are easy but can have a hidden cost; bit vectors have a size more-or-less based on domain size, and so on.   All of these things ... all of the rest of us know, too.   Most of the most-key decision factors of the actual problem to be solved are not in the OP.   At this writing, puterboy has not clarified.

In reply to Re: Array vs. Hash for sparsely integer-indexed data by sundialsvc4
in thread Array vs. Hash for sparsely integer-indexed data by puterboy

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, 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, 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.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others making s'mores by the fire in the courtyard of the Monastery: (3)
    As of 2018-05-20 20:05 GMT
    Find Nodes?
      Voting Booth?