function _dispatchable(methodNames, xf, fn) {
	  return function () {
	    if (arguments.length === 0) {
	      return fn();
	    }
	    var args = Array.prototype.slice.call(arguments, 0);
	    var obj = args.pop();
	    if (!_isArray(obj)) {
	      var idx = 0;
	      while (idx < methodNames.length) {
	        if (typeof obj[methodNames[idx]] === 'function') {
	          return obj[methodNames[idx]].apply(obj, args);
	        }
	        idx += 1;
	      }
	      if (_isTransformer(obj)) {
	        var transducer = xf.apply(null, args);
	        return transducer(obj);
	      }
	    }
	    return fn.apply(this, arguments);
	  };
	}
function _dispatchable(methodNames, xf, fn) {
	  return function () {
	    if (arguments.length === 0) {
	      return fn();
	    }
	    var args = Array.prototype.slice.call(arguments, 0);
	    var obj = args.pop();
	    if (!_isArray(obj)) {
	      var idx = 0;
	      while (idx < methodNames.length) {
	        if (typeof obj[methodNames[idx]] === 'function') {
	          return obj[methodNames[idx]].apply(obj, args);
	        }
	        idx += 1;
	      }
	      if (_isTransformer(obj)) {
	        var transducer = xf.apply(null, args);
	        return transducer(obj);
	      }
	    }
	    return fn.apply(this, arguments);
	  };
	}
function _dispatchable ( methodNames , xf , fn ) { return function ( ) { if ( arguments . length === 0 ) { return fn ( ) ; } var args = Array . prototype . slice . call ( arguments , 0 ) ; var obj = args . pop ( ) ; if ( ! _isArray ( obj ) ) { var idx = 0 ; while ( idx < methodNames . length ) { if ( typeof obj [ methodNames [ idx ] ] === 'function' ) { return obj [ methodNames [ idx ] ] . apply ( obj , args ) ; } idx += 1 ; } if ( _isTransformer ( obj ) ) { var transducer = xf . apply ( null , args ) ; return transducer ( obj ) ; } } return fn . apply ( this , arguments ) ; } ; }
Returns a function that dispatches with different strategies based on the
object in list position (last argument). If it is an array, executes [fn].
Otherwise, if it has a function with one of the given method names, it will
execute that function (functor case). Otherwise, if it is a transformer,
uses transducer [xf] to return a new transformer (transducer case).
Otherwise, it will default to executing [fn].

@private
@param {Array} methodNames properties to check for a custom implementation
@param {Function} xf transducer to initialize if object is transformer
@param {Function} fn default ramda implementation
@return {Function} A function that dispatches on object in list position
Returns a function that dispatches with different strategies based on the object in list position ( last argument ) . If it is an array executes [ fn ] . Otherwise if it has a function with one of the given method names it will execute that function ( functor case ) . Otherwise if it is a transformer uses transducer [ xf ] to return a new transformer ( transducer case ) . Otherwise it will default to executing [ fn ] .