in reply to How to stuff space separated column into Hash

By splitting the string, you get a list with a month, number, month, number, and so on. You can create a hash from this list directly, odd elements become keys and even elements become values: 
#!/usr/bin/perl
use warnings;
use strict;

my @row = ( 'IBM', 'February 1 March 5 July 4' );
my %by_month = split ' ', $row[1];

use Data::Dumper;
print Dumper(\%by_month);

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($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

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