I've got a simple script which finds words matching a regex in a large list.

There can be a large number of matches, so I wanted to write something like when you do "ls | more" and you get the output in chunks of 20 or so, hitting enter for the next chunk.

My code is a bit of a hack, with "if $x < $#list && $x+20 >= $#list"-type code everywhere. Please don't make me show it to you. It works anyway.

My question is more of a golf one, "what's the best way to work through an array over 20 items long in chunks of 20?"

I was trying to do something like this:

while(@array){ print @array[0 .. 20]; delete @array[0 .. 20]; }
But that doesn't work for various reasons which I'm sure are obvious to most monks (stop laughing!).

So, without the use of termporary vars to progressively get 0 .. 19, then 20 .. 29 and so on, how would you do it?



($_='kkvvttuubbooppuuiiffssqqffssmmiibbddllffss')
=~y~b-v~a-z~s; print

In reply to Working Through An Array In Chunks by Cody Pendant

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.