Hi

I have two discontinuous sets of values and some pairs from each sets are "valid" and have assigned values, for example:
# subset 1 of (A..Z)
set_1 = (A, B, C, X, Y, Z)
# subset 2 of (a..z)
set_2 = (q, w, r, t, u)
# valid pairs
valid = ((A,q) = 1, (A,u) = 6, (A,k) => 3, (C,t) = 10, (Z,u) = 30)

[download]
I have a problem with "translating" this to perl. I know I need some kind of map for storing information about valid pairs and their id (like python's map of tuples: (x,y) => z). But having two sets, each consisting of 100 elements requires 100x100=10000 combinations... Is there any quicker method for this?

If I'd have an index like this: 
my %INDEX = { 
    A => { q => 1, u => 6, k => 3 }, 
    C => { t => 10 }, 
    Z => { u => 30 }, 
    M => { q => 100 } 
}

[download]
I could narrow search by creating intersection (e.g. using Set::Object):
# narrow by first set
(set_1) x (keys %INDEX) = (set_1) x (A, C, M, Z) = (A, C, Z)

[download]
then i would be left with an array of hash-refs and do:
set_2 x (q, u, k) + set_2 x (t) + set_2 x (u) = (1, 6, 10, 30)

[download]

I don't like this idea though and I don't know if it would be faster than combinations hash checks. Is there a perl module that would help me with this?

In reply to 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!
  • 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.