@reactivex/ix-es5-esm/iterable/operators/flatmap.js

The Interactive Extensions for JavaScript

import { __extends, __generator, __values } from "tslib";
import { IterableX } from '../iterablex.js';
/** @ignore */
var FlatMapIterable = /** @class */ (function (_super) {
    __extends(FlatMapIterable, _super);
    function FlatMapIterable(source, fn, thisArg) {
        var _this = _super.call(this) || this;
        _this._source = source;
        _this._fn = fn;
        _this._thisArg = thisArg;
        return _this;
    }
    FlatMapIterable.prototype[Symbol.iterator] = function () {
        var index, _a, _b, outerItem, _c, _d, innerItem, e_1_1, e_2_1;
        var e_2, _e, e_1, _f;
        return __generator(this, function (_g) {
            switch (_g.label) {
                case 0:
                    index = 0;
                    _g.label = 1;
                case 1:
                    _g.trys.push([1, 12, 13, 14]);
                    _a = __values(this._source), _b = _a.next();
                    _g.label = 2;
                case 2:
                    if (!!_b.done) return [3 /*break*/, 11];
                    outerItem = _b.value;
                    _g.label = 3;
                case 3:
                    _g.trys.push([3, 8, 9, 10]);
                    _c = (e_1 = void 0, __values(this._fn.call(this._thisArg, outerItem, index++))), _d = _c.next();
                    _g.label = 4;
                case 4:
                    if (!!_d.done) return [3 /*break*/, 7];
                    innerItem = _d.value;
                    return [4 /*yield*/, innerItem];
                case 5:
                    _g.sent();
                    _g.label = 6;
                case 6:
                    _d = _c.next();
                    return [3 /*break*/, 4];
                case 7: return [3 /*break*/, 10];
                case 8:
                    e_1_1 = _g.sent();
                    e_1 = { error: e_1_1 };
                    return [3 /*break*/, 10];
                case 9:
                    try {
                        if (_d && !_d.done && (_f = _c.return)) _f.call(_c);
                    }
                    finally { if (e_1) throw e_1.error; }
                    return [7 /*endfinally*/];
                case 10:
                    _b = _a.next();
                    return [3 /*break*/, 2];
                case 11: return [3 /*break*/, 14];
                case 12:
                    e_2_1 = _g.sent();
                    e_2 = { error: e_2_1 };
                    return [3 /*break*/, 14];
                case 13:
                    try {
                        if (_b && !_b.done && (_e = _a.return)) _e.call(_a);
                    }
                    finally { if (e_2) throw e_2.error; }
                    return [7 /*endfinally*/];
                case 14: return [2 /*return*/];
            }
        });
    };
    return FlatMapIterable;
}(IterableX));
export { FlatMapIterable };
/**
 * Projects each element of an iterable sequence to an iterable sequence and merges
 * the resulting iterable sequences into one iterable sequence.
 *
 * @template TSource The type of the elements in the source sequence.
 * @template TResult The type of the elements in the projected inner sequences and the elements in the merged result sequence.
 * @param {((value: TSource, index: number) => Iterable<TResult>)} selector A transform function to apply to each element.
 * @param {*} [thisArg] Option this for binding to the selector.
 * @returns {OperatorFunction<TSource, TResult>} An operator that creates an iterable sequence whose
 * elements are the result of invoking the one-to-many transform function on each element of the input sequence.
 */
export function flatMap(selector, thisArg) {
    return function flatMapOperatorFunction(source) {
        return new FlatMapIterable(source, selector, thisArg);
    };
}

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