'use strict';
exports.__esModule = true;
exports['default'] = filter;
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
function _inherits(subClass, superClass) { Iif (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); Eif (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
function _classCallCheck(instance, Constructor) { Iif (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
var _Subscriber2 = require('../Subscriber');
var _Subscriber3 = _interopRequireDefault(_Subscriber2);
var _utilTryCatch = require('../util/tryCatch');
var _utilTryCatch2 = _interopRequireDefault(_utilTryCatch);
var _utilErrorObject = require('../util/errorObject');
var _utilBindCallback = require('../util/bindCallback');
var _utilBindCallback2 = _interopRequireDefault(_utilBindCallback);
/**
* Similar to the well-known `Array.prototype.filter` method, this operator filters values down to a set
* allowed by a `select` function
*
* @param {Function} select a function that is used to select the resulting values
* if it returns `true`, the value is emitted, if `false` the value is not passed to the resulting observable
* @param {any} [thisArg] an optional argument to determine the value of `this` in the `select` function
* @returns {Observable} an observable of values allowed by the select function
*/
function filter(select, thisArg) {
return this.lift(new FilterOperator(select, thisArg));
}
var FilterOperator = (function () {
function FilterOperator(select, thisArg) {
_classCallCheck(this, FilterOperator);
this.select = _utilBindCallback2['default'](select, thisArg, 2);
}
FilterOperator.prototype.call = function call(subscriber) {
return new FilterSubscriber(subscriber, this.select);
};
return FilterOperator;
})();
var FilterSubscriber = (function (_Subscriber) {
_inherits(FilterSubscriber, _Subscriber);
function FilterSubscriber(destination, select) {
_classCallCheck(this, FilterSubscriber);
_Subscriber.call(this, destination);
this.count = 0;
this.select = select;
}
FilterSubscriber.prototype._next = function _next(x) {
var result = _utilTryCatch2['default'](this.select)(x, this.count++);
if (result === _utilErrorObject.errorObject) {
this.destination.error(_utilErrorObject.errorObject.e);
} else if (Boolean(result)) {
this.destination.next(x);
}
};
return FilterSubscriber;
})(_Subscriber3['default']);
module.exports = exports['default']; |