data-forge
Version:
JavaScript data transformation and analysis toolkit inspired by Pandas and LINQ.
38 lines • 1.42 kB
JavaScript
;
//
// An iterator that applies a selector function to each item.
//
Object.defineProperty(exports, "__esModule", { value: true });
var SelectManyIterator = /** @class */ (function () {
function SelectManyIterator(iterator, selector) {
this.index = 0;
this.iterator = iterator;
this.selector = selector;
this.outputIterator = null;
}
SelectManyIterator.prototype.next = function () {
// eslint-disable-next-line no-constant-condition
while (true) {
if (this.outputIterator === null) {
var result = this.iterator.next();
if (result.done) {
// https://github.com/Microsoft/TypeScript/issues/8938
return { done: true }; // <= explicit cast here!;
}
var outputIterable = this.selector(result.value, this.index++);
this.outputIterator = outputIterable[Symbol.iterator]();
}
var outputResult = this.outputIterator.next();
if (outputResult.done) {
this.outputIterator = null;
continue;
}
else {
return outputResult;
}
}
};
return SelectManyIterator;
}());
exports.SelectManyIterator = SelectManyIterator;
//# sourceMappingURL=select-many-iterator.js.map