If the string is only two digits, you can use faster check with hash keys existence: 
my %digits = map{ '0'x(2-length($_)).$_, 1 }0..99;

#now keys in %digits are from 00,01 ... to 99

if( exists $digits{$my_dat} ){ ... }

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In reply to Re: Question on pattern matching by sh1tn
in thread Question on pattern matching by Joe_Cullity

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