nl_tokens: Retrieves the value of a specified property from all elements in the collection .
pl_tokens: function pluck ( collection , <mask> ) { var index = - 1 , length = collection ? collection . length : 0 ; if ( typeof length == 'number' ) { var result = Array ( length ) ; while ( ++ index < length ) { result [ index ] = collection [ index ] [ property ] ; } } return result || map ( collection , property ) ; }