Here's the functional version Re: compute paths in Pascal's triangle (aka Tartaglia's one) modified to allow a top other than 0-0.
#!/usr/bin/perl
# http://perlmonks.org/?node_id=1211497
use strict;
use warnings;
sub up
{
my ($row, $col) = split /-/, $_[0];
my ($startrow, $startcol) = split /-/, $_[-1];
return $_[0] eq $_[-1] ? "@_[0..@_-2]\n" :
($row - $startrow > 0 && $col - $startcol > 0 &&
up( ~-$row . '-' . ~-$col, @_ ) ) .
($row - $startrow > $col - $startcol &&
up( ~-$row . '-' . $col, @_ ) );
}
print up( '3-1', '1-0' ); # bottom, top
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|