Use an anchor and negated character class (match comma followed by not comma followed by end of line) 
=~ /(,[^,]+)$/

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or use split 
my $last = ( split /,/, $str ) [ 0 ] ;

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See perlrequick it has several examples

In reply to Re: Regex Doubt. by Anonymous Monk
in thread Regex Doubt. by Anonymous Monk

Title:
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