code: function dereplicate( array ) {
      var a = {};
      var b = [];
      for ( var i = 0, len = array.length; i < len; ++i ) {
        if ( a[ array[i] ] !== true ) {
          a[ array[i] ] = true;
          b.push( array[i] );
        }
      }
      return b;
    }
docs: ////////////////// // Helpers //////////////////