@reactivex/ix-es2015-cjs
Version:
The Interactive Extensions for JavaScript
76 lines (74 loc) • 3.99 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.groupJoin = exports.GroupJoinAsyncIterable = void 0;
const tslib_1 = require("tslib");
const asynciterablex_js_1 = require("../asynciterablex.js");
const _grouping_js_1 = require("./_grouping.js");
const empty_js_1 = require("../empty.js");
const identity_js_1 = require("../../util/identity.js");
const withabort_js_1 = require("./withabort.js");
const aborterror_js_1 = require("../../aborterror.js");
/** @ignore */
class GroupJoinAsyncIterable extends asynciterablex_js_1.AsyncIterableX {
constructor(outer, inner, outerSelector, innerSelector, resultSelector) {
super();
this._outer = outer;
this._inner = inner;
this._outerSelector = outerSelector;
this._innerSelector = innerSelector;
this._resultSelector = resultSelector;
}
[Symbol.asyncIterator](signal) {
return tslib_1.__asyncGenerator(this, arguments, function* _a() {
var _b, e_1, _c, _d;
(0, aborterror_js_1.throwIfAborted)(signal);
const map = yield tslib_1.__await((0, _grouping_js_1.createGrouping)(this._inner, this._innerSelector, identity_js_1.identity, signal));
try {
for (var _e = true, _f = tslib_1.__asyncValues((0, withabort_js_1.wrapWithAbort)(this._outer, signal)), _g; _g = yield tslib_1.__await(_f.next()), _b = _g.done, !_b; _e = true) {
_d = _g.value;
_e = false;
const outerElement = _d;
const outerKey = yield tslib_1.__await(this._outerSelector(outerElement, signal));
const innerElements = map.has(outerKey) ? map.get(outerKey) : (0, empty_js_1.empty)();
yield yield tslib_1.__await(yield tslib_1.__await(this._resultSelector(outerElement, asynciterablex_js_1.AsyncIterableX.as(innerElements), signal)));
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (!_e && !_b && (_c = _f.return)) yield tslib_1.__await(_c.call(_f));
}
finally { if (e_1) throw e_1.error; }
}
});
}
}
exports.GroupJoinAsyncIterable = GroupJoinAsyncIterable;
/**
* Correlates the elements of two async-iterable sequences based on equality of keys and groups the results.
*
* @template TOuter The type of the elements of the first async-iterable sequence.
* @template TInner The type of the elements of the second async-iterable sequence.
* @template TKey The type of the keys returned by the key selector functions.
* @template TResult The type of the result elements.
* @param {AsyncIterable<TInner>} inner The async-enumerable sequence to join to the first sequence.
* @param {((value: TOuter, signal?: AbortSignal) => TKey | Promise<TKey>)} outerSelector A function to extract the join key from each
* element of the first sequence.
* @param {((value: TInner, signal?: AbortSignal) => TKey | Promise<TKey>)} innerSelector A function to extract the join key from each
* element of the second sequence.
* @param {((
* outer: TOuter,
* inner: AsyncIterable<TInner>,
* signal?: AbortSignal
* ) => TResult | Promise<TResult>)} resultSelector A function to create a result element from an element from the first sequence and a
* collection of matching elements from the second sequence.
* @returns {OperatorAsyncFunction<TOuter, TResult>} An operator that returns an async-iterable sequence that contains the result elements
* that are obtained by performing a grouped join on two sequences.
*/
function groupJoin(inner, outerSelector, innerSelector, resultSelector) {
return function groupJoinOperatorFunction(outer) {
return new GroupJoinAsyncIterable(outer, inner, outerSelector, innerSelector, resultSelector);
};
}
exports.groupJoin = groupJoin;
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