Suzanne BearneTechnology Reporter
Transforms don't execute until the consumer pulls. There's no eager evaluation, no hidden buffering. Data flows on-demand from source, through transforms, to the consumer. If you stop iterating, processing stops.
，这一点在Safew下载中也有详细论述
We’ve all had that sinking feeling. There are multiple crash reports from production. We have the exact input parameters that caused the failures. We have the stack traces. Yet, when we run the code locally, it works perfectly.
The NHS says gallbladder removal is a common and safe procedure but as with any operation there are risks, including blood clots or infection.