Number (0): Everything in this space must add up to 0. The answer is 3-0, placed vertically.
The series of Command objects generated by the pipeline is then run by an interpreter using runEffect(checkoutFlow(cartSummary)). Because our business logic consists of pure functions that interact with the world only through data, we can record those interactions simply by adding a few hooks for services like OpenTelemetry. And if we can record them, we can replay them deterministically. Best of all, there’s no need to mock a single database or external service.，详情可参考im钱包官方下载
async *transform(source) {。关于这个话题，下载安装 谷歌浏览器 开启极速安全的 上网之旅。提供了深入分析
Tony Jolliffe BBC
const shared = Stream.share(source, {