Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

Comment on

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

If you comment the second line, $end will be undefined in the loop condition. Please, use strict and use warnings in your code if you want to learn Perl the easy way. This code works as expected:

use strict; use warnings; my @array=(1,2,3,4,5,6,7,8,9); my $end=($#array+1); my $index = 0; while($index < $end){ my $last=pop(@array); print "$last\n"; $index++; }

BTW, here are another ways to address the same problem:

my @array = (1..9); print +(pop @array),"\n" while (@array);

or even

my @array = (1..9); print "array[$_]\n" for (reverse (0..$#array));

citromatik


In reply to Re: $#array issue by citromatik
in thread $#array issue by biohisham

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, 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?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    [LanX]: I remeber M::S (it was dialog driven?) to be buggy
    [stevieb]: As far as Dist::Zilla goes, I don't like installing that other than on systems my test platorm runs on. I find it too heavy. I prefer being able to glean a Makefile.PL
    [LanX]: what's frustrating me is that a distribution has lots of dupplicated info
    [stevieb]: LanX I don't know if it's dialog driven; I just use it in the simplest of terms (just run module-starter at the CLI, and the very last couple of lines are how I use it.
    [stevieb]: which dist are you speaking of regarding dups, LanX?
    [LanX]: readme version number and so on ...
    [stevieb]: with M::S, you can also add other tags, but defaults work... such as --license=perl --eumm

    How do I use this? | Other CB clients
    Other Users?
    Others wandering the Monastery: (4)
    As of 2017-08-18 20:54 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Who is your favorite scientist and why?



























      Results (310 votes). Check out past polls.

      Notices?