nl_tokens: A specialized version of baseAggregator for arrays .
pl_tokens: function arrayAggregator ( array , setter , iteratee , accumulator ) { var index = - 1 , length = array ? array . length : 0 ; while ( ++ <mask> < length ) { var value = array [ index ] ; setter ( accumulator , value , iteratee ( value ) , array ) ; } return accumulator ; }