lib/query.js
function(options) {
      var self = this;
      options = options || {};

      var params = this.toJSON();
      params.limit = 0;
      params.count = 1;
      var request = Parse._request({
        route: "classes",
        className: self.className, 
        method: "GET",
        useMasterKey: options.useMasterKey,
        data: params
      });

      return request.then(function(response) {
        return response.count;
      })._thenRunCallbacks(options);
    }
function(options) {
      var self = this;
      options = options || {};

      var params = this.toJSON();
      params.limit = 0;
      params.count = 1;
      var request = Parse._request({
        route: "classes",
        className: self.className, 
        method: "GET",
        useMasterKey: options.useMasterKey,
        data: params
      });

      return request.then(function(response) {
        return response.count;
      })._thenRunCallbacks(options);
    }
function ( options ) { var self = this ; options = options || { } ; var params = this . toJSON ( ) ; params . limit = 0 ; params . count = 1 ; var request = Parse . _request ( { route : "classes" , className : self . className , method : "GET" , useMasterKey : options . useMasterKey , data : params } ) ; return request . then ( function ( response ) { return response . count ; } ) . _thenRunCallbacks ( options ) ; }
Counts the number of objects that match this query.
Either options.success or options.error is called when the count
completes.

@param {Object} options A Backbone-style options object. Valid options
are:<ul>
<li>success: Function to call when the count completes successfully.
<li>error: Function to call when the find fails.
<li>useMasterKey: In Cloud Code and Node only, causes the Master Key to
be used for this request.
</ul>

@return {Parse.Promise} A promise that is resolved with the count when
the query completes.
Counts the number of objects that match this query . Either options . success or options . error is called when the count completes .