Perl: the Markov chain saw PerlMonks

### Comment on

 Need Help??
I am workong on a school assignment that involves testing all the different combinations of array elements in @speeds. Currently I am using this code to do that:
use strict; use Math::monthly::CarClumps qw\count\; my ( @order , @clumps, \$total , @speeds ); # speed of cars @speeds = ( 50 .. 59 ); # initialize @clumps as {0} @clumps = (0) x ( @speeds + 1 ); clumps ( @speeds ); foreach my \$i ( 1 .. \$#clumps ) { print \$i + \$speeds[0] - 1, " :\t\$clumps[\$i]\t( ", ( \$clumps[\$i] * 100 / \$total ), "% )\n" } print "total :\t\$total ( = ", scalar @speeds, "! )\n"; exit 0; sub clumps { my @cars = @_; if ( scalar @cars eq 0 ) { \$clumps[count(@order)]++; \$total++ } else { foreach ( 0 .. \$#cars) { my \$speed = pop @cars; unshift @order, \$speed; clumps( @cars ); unshift @cars, \$speed; } } shift @order; return 0; }
The clumps() sub uses a tree recursion model which is really slow (particularly on a 90mhz box). Has anyone had to do a similar thing and can suggest a better model for testing all the combinations of @speeds?

In reply to Finding all Combinations by narse

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.
• 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: & & < < > > [ [ ] ]
• Link using PerlMonks shortcuts! What shortcuts can I use for linking?

Create A New User
Chatterbox?
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others having an uproarious good time at the Monastery: (7)
As of 2018-03-20 06:53 GMT
Sections?
Information?
Find Nodes?
Leftovers?
Voting Booth?
When I think of a mole I think of:

Results (248 votes). Check out past polls.

Notices?