axax
Version:
A library of async iterator extensions for JavaScript including ```map```, ```reduce```, ```filter```, ```flatMap```, ```pipe``` and [more](https://github.com/jamiemccrindle/axax/blob/master/docs/API.md#functions).
104 lines (103 loc) • 6.02 kB
JavaScript
;
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __asyncValues = (this && this.__asyncValues) || function (o) {
if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
var m = o[Symbol.asyncIterator], i;
return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i);
function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }
function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }
};
var __await = (this && this.__await) || function (v) { return this instanceof __await ? (this.v = v, this) : new __await(v); }
var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) {
if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
var g = generator.apply(thisArg, _arguments || []), i, q = [];
return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i;
function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }
function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }
};
Object.defineProperty(exports, "__esModule", { value: true });
/**
* Filters items from an iterable
*
* @param source the source iterable to filter
* @param predicate the predicate to apply to filter items
*/
function filter(predicate) {
return function inner(source) {
return __asyncGenerator(this, arguments, function inner_1() {
var source_1, source_1_1, item, e_1_1;
var e_1, _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
_b.trys.push([0, 9, 10, 15]);
source_1 = __asyncValues(source);
_b.label = 1;
case 1: return [4 /*yield*/, __await(source_1.next())];
case 2:
if (!(source_1_1 = _b.sent(), !source_1_1.done)) return [3 /*break*/, 8];
item = source_1_1.value;
return [4 /*yield*/, __await(predicate(item))];
case 3:
if (!_b.sent()) return [3 /*break*/, 7];
return [4 /*yield*/, __await(item)];
case 4: return [4 /*yield*/, __await.apply(void 0, [_b.sent()])];
case 5: return [4 /*yield*/, _b.sent()];
case 6:
_b.sent();
_b.label = 7;
case 7: return [3 /*break*/, 1];
case 8: return [3 /*break*/, 15];
case 9:
e_1_1 = _b.sent();
e_1 = { error: e_1_1 };
return [3 /*break*/, 15];
case 10:
_b.trys.push([10, , 13, 14]);
if (!(source_1_1 && !source_1_1.done && (_a = source_1.return))) return [3 /*break*/, 12];
return [4 /*yield*/, __await(_a.call(source_1))];
case 11:
_b.sent();
_b.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*/];
}
});
});
};
}
exports.filter = filter;