How to convert a Tabletop result (i.e. csv import) to a javascript object, using a target schema.

schematize

<script src="tabletop.js"></script>
<script type="text/javascript">
  window.onload = function() { 
      init() 
  };

  var public_spreadsheet_url = 'https://docs.google.com/spreadsheet/pub?hl=en_US&hl=en_US&key=0AmYzu_s7QHsmdDNZUzRlYldnWTZCLXdrMXlYQzVxSFE&output=html';

  function init() {
      Tabletop.init( { 
          key: public_spreadsheet_url,
          callback: showInfo,
          simpleSheet: true, 
      } )
  }
  
  var schema = {
          '%Category': {
              '%Name': {
                'Healthiness': '%Healthiness',
              },
          },
      };

  function showInfo(data, tabletop) {
      var food = convert(data, schema);
      console.log(food);
  }  

  function convert(data, schema) {
      var traverse = function (row, schema, obj) {
          for(j in schema){
              var k = j
              if (k[0] == '%') { 
                  k = row[k.slice(1)] 
              }
              if (typeof(schema[j]) === typeof({})) {
                  obj[k] = {};
                  traverse(row, schema[j], obj[k]);
              } else {
                  var v = schema[j];
                  if (v[0] == '%') {
                      v = row[v.slice(1)];
                  }
                  obj[k] = v;        
              } 
          }
      };
      var instance = {}
      for (i in data){
          traverse(data[i], schema, instance);
      }
      return instance;
  }

</script>