anchor.diff:    homeroom: function(id) {
       return baseUrl + '/homerooms/' + id;
     }
  -};
  -
  -
  -
  -// React helper fns
  -var dom = React.DOM;
  -var createEl = React.createElement.bind(React);
  -var merge = function(a, b) {
  -  var out = {};
  -  Object.keys(a).concat(Object.keys(b)).forEach(function(key) {
  -    out[key] = b[key] || a[key];
  -  });
  -  return out;
   };
   
   
  
positive.code:     return null;
    }
  };
  
  
  var StudentsTable = React.createClass({
  
negative.code:     window.history.pushState({}, null, this.filtersHash());
    },
  
    filteredStudents: function() {
      return this.state.filters.reduce(function(filteredStudents, filter) {
        return filteredStudents.filter(filter.filterFn);
  