@reactivex/ix-es2015-cjs
Version:
The Interactive Extensions for JavaScript
50 lines (48 loc) • 2.06 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.includes = void 0;
const tslib_1 = require("tslib");
const comparer_js_1 = require("../util/comparer.js");
const withabort_js_1 = require("./operators/withabort.js");
const aborterror_js_1 = require("../aborterror.js");
/**
* Determines whether an async-itreable includes a certain value among its entries, returning true or false as appropriate.
*
* @template T The type of elements in the source sequence.
* @param {AsyncIterable<T>} source The source sequence to search for the item.
* @param {T} valueToFind The value to search for.
* @param {number} [fromIndex=0] The position in this async-iterable at which to begin searching for valueToFind.
* @param {AbortSignal} [signal] An optional abort signal to cancel the operation at any time.
* @returns {Promise<boolean>} Returns a promise containing true if the value valueToFind is found within the async-iterable.
*/
function includes(source, valueToFind, fromIndex = 0, signal) {
var _a, e_1, _b, _c;
return tslib_1.__awaiter(this, void 0, void 0, function* () {
(0, aborterror_js_1.throwIfAborted)(signal);
let fromIdx = fromIndex;
let i = 0;
if (Math.abs(fromIdx)) {
fromIdx = 0;
}
try {
for (var _d = true, _e = tslib_1.__asyncValues((0, withabort_js_1.wrapWithAbort)(source, signal)), _f; _f = yield _e.next(), _a = _f.done, !_a; _d = true) {
_c = _f.value;
_d = false;
const item = _c;
if (i++ > fromIdx && (0, comparer_js_1.comparer)(item, valueToFind)) {
return true;
}
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (!_d && !_a && (_b = _e.return)) yield _b.call(_e);
}
finally { if (e_1) throw e_1.error; }
}
return false;
});
}
exports.includes = includes;
//# sourceMappingURL=includes.js.map