Well, to be honest I think your criticism should be aimed at the way I presented the algorithm (mostly as "proof of concept") than the algorithm itself.
For instance it would work just fine for a picking N elelements from a file of known arbitrarily large size, regardless of fixed record or not, and of media restrictions (for instance it would work fine for data stroed on a tape).
Whereas the algorithm you mention (and thanks :-) needs to have the full set in memory at one time, or efficient random access to the records as stored on some form of fixed media (which afaict would require fixed record lengths).
I realize this criticism applys to my implementation as well, since I used an array. Clearly I shouldnt have as it distracts from the point I was making. :-)
Thanks for the comments though, added value for the thread for sure.
Dont be sorry, I should have explained in more detail. You know the old saying about how
Ass u me is a bad thing...
Yves / DeMerphq
Writing a good benchmark isnt as easy as it might look.
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:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- 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
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||