@reactivex/ix-es2015-cjs
Version:
The Interactive Extensions for JavaScript
61 lines (59 loc) • 2.59 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.map = exports.MapAsyncIterable = void 0;
const tslib_1 = require("tslib");
const asynciterablex_js_1 = require("../asynciterablex.js");
const withabort_js_1 = require("./withabort.js");
const aborterror_js_1 = require("../../aborterror.js");
/** @ignore */
class MapAsyncIterable extends asynciterablex_js_1.AsyncIterableX {
constructor(source, selector, thisArg) {
super();
this._source = source;
this._selector = selector;
this._thisArg = thisArg;
}
[Symbol.asyncIterator](signal) {
return tslib_1.__asyncGenerator(this, arguments, function* _a() {
var _b, e_1, _c, _d;
(0, aborterror_js_1.throwIfAborted)(signal);
let i = 0;
try {
for (var _e = true, _f = tslib_1.__asyncValues((0, withabort_js_1.wrapWithAbort)(this._source, signal)), _g; _g = yield tslib_1.__await(_f.next()), _b = _g.done, !_b; _e = true) {
_d = _g.value;
_e = false;
const item = _d;
const result = yield tslib_1.__await(this._selector.call(this._thisArg, item, i++, signal));
yield yield tslib_1.__await(result);
}
}
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.MapAsyncIterable = 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.
*/
function map(selector, thisArg) {
return function mapOperatorFunction(source) {
return new MapAsyncIterable(source, selector, thisArg);
};
}
exports.map = map;
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