@reactivex/ix-es5-esm/asynciterable/operators/map.js

The Interactive Extensions for JavaScript

import { __asyncGenerator, __asyncValues, __await, __extends, __generator } from "tslib";
import { AsyncIterableX } from '../asynciterablex.js';
import { wrapWithAbort } from './withabort.js';
import { throwIfAborted } from '../../aborterror.js';
/** @ignore */
var MapAsyncIterable = /** @class */ (function (_super) {
    __extends(MapAsyncIterable, _super);
    function MapAsyncIterable(source, selector, thisArg) {
        var _this = _super.call(this) || this;
        _this._source = source;
        _this._selector = selector;
        _this._thisArg = thisArg;
        return _this;
    }
    MapAsyncIterable.prototype[Symbol.asyncIterator] = function (signal) {
        return __asyncGenerator(this, arguments, function _a() {
            var i, _b, _c, _d, item, result, e_1_1;
            var _e, e_1, _f, _g;
            return __generator(this, function (_h) {
                switch (_h.label) {
                    case 0:
                        throwIfAborted(signal);
                        i = 0;
                        _h.label = 1;
                    case 1:
                        _h.trys.push([1, 9, 10, 15]);
                        _b = true, _c = __asyncValues(wrapWithAbort(this._source, signal));
                        _h.label = 2;
                    case 2: return [4 /*yield*/, __await(_c.next())];
                    case 3:
                        if (!(_d = _h.sent(), _e = _d.done, !_e)) return [3 /*break*/, 8];
                        _g = _d.value;
                        _b = false;
                        item = _g;
                        return [4 /*yield*/, __await(this._selector.call(this._thisArg, item, i++, signal))];
                    case 4:
                        result = _h.sent();
                        return [4 /*yield*/, __await(result)];
                    case 5: return [4 /*yield*/, _h.sent()];
                    case 6:
                        _h.sent();
                        _h.label = 7;
                    case 7:
                        _b = true;
                        return [3 /*break*/, 2];
                    case 8: return [3 /*break*/, 15];
                    case 9:
                        e_1_1 = _h.sent();
                        e_1 = { error: e_1_1 };
                        return [3 /*break*/, 15];
                    case 10:
                        _h.trys.push([10, , 13, 14]);
                        if (!(!_b && !_e && (_f = _c.return))) return [3 /*break*/, 12];
                        return [4 /*yield*/, __await(_f.call(_c))];
                    case 11:
                        _h.sent();
                        _h.label = 12;
                    case 12: return [3 /*break*/, 14];
                    case 13:
                        if (e_1) throw e_1.error;
                        return [7 /*endfinally*/];
                    case 14: return [7 /*endfinally*/];
                    case 15: return [2 /*return*/];
                }
            });
        });
    };
    return MapAsyncIterable;
}(AsyncIterableX));
export { MapAsyncIterable };
/**
 * Projects each element of an async-enumerable sequence into a new form.
 *
 * @template TSource The type of the elements in the source sequence.
 * @template TResult The type of the elements in the result sequence, obtained by running the selector
 * function for each element in the source sequence.
 * @param {((value: TSource, index: number, signal?: AbortSignal) => Promise<TResult> | TResult)} selector A transform function
 * to apply to each source element.
 * @param {*} [thisArg] Optional this for binding to the selector.
 * @returns {OperatorAsyncFunction<TSource, TResult>} An async-iterable sequence whose elements are the result of invoking the transform
 * function on each element of source.
 */
export function map(selector, thisArg) {
    return function mapOperatorFunction(source) {
        return new MapAsyncIterable(source, selector, thisArg);
    };
}

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