data-forge-beta
Version:
JavaScript data transformation and analysis toolkit inspired by Pandas and LINQ.
59 lines • 1.89 kB
JavaScript
;
//
// An iterator that can iterate multiple other iterators at once.
// This allows iterators to be composed.
// This is used in Data-Forge to combine iterators for index and values.
//
var __values = (this && this.__values) || function (o) {
var m = typeof Symbol === "function" && o[Symbol.iterator], i = 0;
if (m) return m.call(o);
return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
};
Object.defineProperty(exports, "__esModule", { value: true });
var MultiIterator = /** @class */ (function () {
function MultiIterator(iterators) {
this.iterators = iterators;
}
MultiIterator.prototype.next = function () {
if (this.iterators.length === 0) {
return {
done: true,
value: [],
};
}
var multiResult = [];
try {
for (var _a = __values(this.iterators), _b = _a.next(); !_b.done; _b = _a.next()) {
var iterator = _b.value;
var result = iterator.next();
if (result.done) {
return {
done: true,
value: [],
};
}
multiResult.push(result.value);
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
}
finally { if (e_1) throw e_1.error; }
}
return {
done: false,
value: multiResult
};
var e_1, _c;
};
return MultiIterator;
}());
exports.MultiIterator = MultiIterator;
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