An alternative approach split'ing on points preceded by a letter and followed by a value or vice versa.

use 5.014;
use Data::Dumper;

open my $inFH, q{<}, \ <<EOD or die $!;
N260G02X142.05Y649.62I77.33J58.34H2M25
N265M20
N270G45
N275G01X304.78Y608.8C45.91M25
N280M20
N285G46C0
N290G03X324.39Y638.4I-69.58J67.4H2M25
N295M20
N300G45
N305G01X180.04Y592.89C326.5M25
N310X279.77Y586.78C26.5
N315X195.39Y584.57C336.5
N320X228.31Y579.58C355.92
EOD

my @dataLines =
   map { { split m{(?x) (?<=[A-Z]) (?=[-\d]) | (?<=[-\d]) (?=[A-Z]) } 
+} }
   map { chomp; $_ }
   <$inFH>;

close $inFH or die $!;

print Data::Dumper->Dumpxs( [ \ @dataLines ], [ qw{ *dataLines } ] );

[download]

The output.

@dataLines = (
               {
                 'M' => '25',
                 'J' => '58.34',
                 'Y' => '649.62',
                 'H' => '2',
                 'I' => '77.33',
                 'N' => '260',
                 'X' => '142.05',
                 'G' => '02'
               },
               {
                 'M' => '20',
                 'N' => '265'
               },
               {
                 'G' => '45',
                 'N' => '270'
               },
               {
                 'G' => '01',
                 'Y' => '608.8',
                 'X' => '304.78',
                 'M' => '25',
                 'C' => '45.91',
                 'N' => '275'
               },
               {
                 'M' => '20',
                 'N' => '280'
               },
               {
                 'N' => '285',
                 'C' => '0',
                 'G' => '46'
               },
               {
                 'Y' => '638.4',
                 'J' => '67.4',
                 'M' => '25',
                 'G' => '03',
                 'X' => '324.39',
                 'I' => '-69.58',
                 'N' => '290',
                 'H' => '2'
               },
               {
                 'N' => '295',
                 'M' => '20'
               },
               {
                 'G' => '45',
                 'N' => '300'
               },
               {
                 'N' => '305',
                 'C' => '326.5',
                 'M' => '25',
                 'G' => '01',
                 'Y' => '592.89',
                 'X' => '180.04'
               },
               {
                 'N' => '310',
                 'C' => '26.5',
                 'X' => '279.77',
                 'Y' => '586.78'
               },
               {
                 'Y' => '584.57',
                 'X' => '195.39',
                 'C' => '336.5',
                 'N' => '315'
               },
               {
                 'X' => '228.31',
                 'Y' => '579.58',
                 'N' => '320',
                 'C' => '355.92'
               }
             );

[download]

I hope this is helpful.

Cheers,

JohnGG

In reply to Re: Efficient split for alpha numeric pairs in a row by johngg
in thread Efficient split for alpha numeric pairs in a row by merrymonk

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.