nl_tokens: Pick
pl_tokens: function pick ( object , keys ) { var data = { } ; if ( typeof keys === 'function' ) { for ( var x in object ) { if ( object . hasOwnProperty ( x ) && keys ( object [ x ] , x ) ) { data [ x ] = object [ x ] ; } } } else { for ( var i = 0 , c = keys . length ; i < c ; i ++ ) { data [ <mask> [ i ] ] = object [ keys [ i ] ] ; } } return data ; }