As far as managing the structure of the data goes, it looks like this should be sufficient:

#! /usr/bin/perl -w
use strict;
use Data::Dumper;

my %data;

while ( <DATA> ) {
    chomp;
    my ( $begin, $end, $tag, @vals ) = split /[-,:]/;
    push @{$data{$begin}{$tag}{end_vals}}, $end;
    push @{$data{$begin}{$tag}{vals}}, @vals;
}

print Dumper \%data;

__DATA__
100-233,MA,150:250
100-344,MA,350:
200-400,ER,
200-300,ER,576

[download]

I'll leave the formatting up to you. :-)


_______________
DamnDirtyApe 
Those who know that they are profound strive for clarity. Those who
would like to seem profound to the crowd strive for obscurity.
            --Friedrich Nietzsche

In reply to Re: Tricky Problem by DamnDirtyApe
in thread Tricky Problem by perl_krish

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