FILE *file = fopen("data.txt", "r");
Most userland implementations of custom ReadableStream instances do not typically bother with all the ceremony required to correctly implement both default and BYOB read support in a single stream – and for good reason. It's difficult to get right and most of the time consuming code is typically going to fallback on the default read path. The example below shows what a "correct" implementation would need to do. It's big, complex, and error prone, and not a level of complexity that the typical developer really wants to have to deal with:
，详情可参考新收录的资料
be integrated with a wide range of data sources
See how that works? See how you typed 5 numbers and 3 fields filled themselves in? See how you're now typing your street address and it already knows what city you're in? That's not magic. That's a lookup table. We've had those since the 1960s.
Now when I want to test a feature, I ask the clanker3 to write me a runbook in Org. Then I can review it – the prose explains the model's reflection of the intent for each step, and the code blocks are interactively executable once I am done reviewing, either one at a time or the whole file like a script. The results will be stored in the document, under the code, like a Jupyter notebook.