nl_tokens: Traverses a given array . If mutating empty respnses will be removed for child elements .
pl_tokens: function acceptArray ( array ) { for ( var i = 0 , l = array . length ; i < l ; i ++ ) { this . acceptKey ( <mask> , i ) ; if ( ! array [ i ] ) { array . splice ( i , 1 ) ; i -- ; l -- ; } } }