my @array  = (
    ['ashok',15,'2006-01-01'],
    ['ashokpj',15,'2006-02-01'],
    ['ravi',56,'2006-03-01'],
    ['raja',56,'2006-02-01'],
);

##</code><code>##

@res = (  ['ashokpj',15,'2006-02-01'],
    ['ravi',56,'2006-03-01'] );