Something like this perhaps:

#!/usr/local/bin/perl

use strict;
use warnings;

my %conv = (k => 1000, kb => 1024, g => 1000000, gb => 1024 * 1024);

# Note that the keys are sorted to put the longer
# matches first in the regex
my $keys = join '|', sort { length $b <=> length $a } keys %conv;

while (<DATA>) {
  print "$_ -> ";
  s/(\d+)($keys)/$1 * $conv{$2}/e;
  print "$_\n";
}
__END__
30k
30kb
10g
10gb

[download]

This gives:

$ ./test.pl
30k
 -> 30000

30kb
 -> 30720

10g
 -> 10000000

10gb
 -> 10485760

[download]

Update: Yes I know that some of the multipliers are wrong. Correcting them is left as as exercise for the reader :)

--
<http://www.dave.org.uk>

"The first rule of Perl club is you do not talk about Perl club."
-- Chip Salzenberg

In reply to Re: converting "30k" string to integer by davorg
in thread converting "30k" string to integer by dwhite20899

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.