Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
If you want to understand what's going on, you can try adding some print statements. This should make it pretty clear what's happening.
use strict; my @list = qw(1 2 3 4 5); my $each = ""; my $i = 0; my @newlist = (); foreach $each (@list) { print "Each was: $each\n"; #new $each *= 2; print "Each is: $each\n"; #new $newlist[$i] = $each; print "New list is: $newlist[$i]\n"; #new print "Old list is $list[$i]\n\n"; #new ++$i; } for ($i= 0; $i<5; ++$i) { print ($newlist[$i] - $list[$i], "\n"); }
And maybe in the future it would be a good idea for the reason for what happens to be included in the 'black box of enlightenment' so that people won't just be puzzled, but will learn, too? (Or maybe not; it's good debugging practice to figure out where the unexpected happens. Why have the box at all? There isn't much point to just show the output, since people can just run the program to see the output.)

In reply to (kudra) Re2: NEWBIE Brain Teaser by kudra
in thread NEWBIE Brain Teaser by nysus

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, 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:
    & &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?

    What's my password?
    Create A New User
    NodeReaper cleans and fillets

    How do I use this? | Other CB clients
    Other Users?
    Others chanting in the Monastery: (6)
    As of 2018-04-20 07:45 GMT
    Find Nodes?
      Voting Booth?