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

The Interactive Extensions for JavaScript

import { __extends, __generator, __read, __values } from "tslib";
import { IterableX } from '../iterablex.js';
import { identity } from '../../util/identity.js';
import { createGrouping } from './_grouping.js';
/** @ignore */
/** @ignore */
var GroupedIterable = /** @class */ (function (_super) {
    __extends(GroupedIterable, _super);
    function GroupedIterable(key, source) {
        var _this = _super.call(this) || this;
        _this.key = key;
        _this._source = source;
        return _this;
    }
    GroupedIterable.prototype[Symbol.iterator] = function () {
        var _a, _b, item, e_1_1;
        var e_1, _c;
        return __generator(this, function (_d) {
            switch (_d.label) {
                case 0:
                    _d.trys.push([0, 5, 6, 7]);
                    _a = __values(this._source), _b = _a.next();
                    _d.label = 1;
                case 1:
                    if (!!_b.done) return [3 /*break*/, 4];
                    item = _b.value;
                    return [4 /*yield*/, item];
                case 2:
                    _d.sent();
                    _d.label = 3;
                case 3:
                    _b = _a.next();
                    return [3 /*break*/, 1];
                case 4: return [3 /*break*/, 7];
                case 5:
                    e_1_1 = _d.sent();
                    e_1 = { error: e_1_1 };
                    return [3 /*break*/, 7];
                case 6:
                    try {
                        if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
                    }
                    finally { if (e_1) throw e_1.error; }
                    return [7 /*endfinally*/];
                case 7: return [2 /*return*/];
            }
        });
    };
    return GroupedIterable;
}(IterableX));
export { GroupedIterable };
/** @ignore */
var GroupByIterable = /** @class */ (function (_super) {
    __extends(GroupByIterable, _super);
    function GroupByIterable(source, keySelector, elementSelector) {
        var _this = _super.call(this) || this;
        _this._source = source;
        _this._keySelector = keySelector;
        _this._elementSelector = elementSelector;
        return _this;
    }
    GroupByIterable.prototype[Symbol.iterator] = function () {
        var map, map_1, map_1_1, _a, key, values, e_2_1;
        var e_2, _b;
        return __generator(this, function (_c) {
            switch (_c.label) {
                case 0:
                    map = createGrouping(this._source, this._keySelector, this._elementSelector);
                    _c.label = 1;
                case 1:
                    _c.trys.push([1, 6, 7, 8]);
                    map_1 = __values(map), map_1_1 = map_1.next();
                    _c.label = 2;
                case 2:
                    if (!!map_1_1.done) return [3 /*break*/, 5];
                    _a = __read(map_1_1.value, 2), key = _a[0], values = _a[1];
                    return [4 /*yield*/, new GroupedIterable(key, values)];
                case 3:
                    _c.sent();
                    _c.label = 4;
                case 4:
                    map_1_1 = map_1.next();
                    return [3 /*break*/, 2];
                case 5: return [3 /*break*/, 8];
                case 6:
                    e_2_1 = _c.sent();
                    e_2 = { error: e_2_1 };
                    return [3 /*break*/, 8];
                case 7:
                    try {
                        if (map_1_1 && !map_1_1.done && (_b = map_1.return)) _b.call(map_1);
                    }
                    finally { if (e_2) throw e_2.error; }
                    return [7 /*endfinally*/];
                case 8: return [2 /*return*/];
            }
        });
    };
    return GroupByIterable;
}(IterableX));
export { GroupByIterable };
/**
 * Groups the elements of an async-iterable sequence and selects the resulting elements by using a specified function.
 *
 * @template TSource The type of the elements in the source sequence.
 * @template TKey The type of the grouping key computed for each element in the source sequence.
 * @template TValue The type of the elements within the groups computed for each element in the source sequence.
 * @param {((value: TSource) => TKey)} keySelector A function to extract the key for each element.
 * @param {((value: TSource) => TValue)} [elementSelector=identity] A function to map each source element to an element in an async-enumerable group.
 * @returns {OperatorFunction<TSource, TResult>} A sequence of async-iterable groups, each of which corresponds to a unique key value,
 * containing all elements that share that same key value.
 */
export function groupBy(keySelector, elementSelector) {
    if (elementSelector === void 0) { elementSelector = identity; }
    return function groupByOperatorFunction(source) {
        return new GroupByIterable(source, keySelector, elementSelector);
    };
}

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