Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister
 
PerlMonks  

Comment on

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

No need to worry about narrowing your search or whatever. Hash lookups are fast.

The code below creates a hash for a 100 x 100 matrix. It also assumes that each matrix pair has a value (worst case, given your 'spec'). To simplify validation, I make this value 1, but changing it to any other number makes no difference to the time required for lookup.

Subsequently, I make another worst-case assumption, namely that your lists of search terms (what you call Subset 1 and Subset 2) are maximally large.

On my machine, it finishes before I can blink. Run it and see:

use strict; use warnings; # Create 100 x 100 datastructure: my @uc = ( 'AA' .. 'DV' ); my @lc = ( 'aa' .. 'dv' ); my %index; for my $k ( @uc ) { for my $v ( @lc ) { $index{$k}{$v} = 1; } } # Parse it: my $score; for my $k ( @uc ) { # or: for my $k ( @subset_1 ) for my $v ( @lc ) { # or: for my $v ( @subset_2 ) $score += $index{$k}{$v} || 0; } } print $score;

In reply to Re: Two dimensional sets intersection by Not_a_Number
in thread Two dimensional sets intersection by menth0l

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!
  • 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
  • Outside of code tags, you may need to use entities for some characters:
            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?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others contemplating the Monastery: (12)
    As of 2014-12-26 07:20 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      Is guessing a good strategy for surviving in the IT business?





      Results (167 votes), past polls