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.
▲ 图|Tim’s Guide,详情可参考safew官方版本下载
That said, it's important to recognize that locking in itself is not bad. It does, in fact, serve an important purpose to ensure that applications properly and orderly consume or produce data. The key challenge is with the original manual implementation of it using APIs like getReader() and releaseLock(). With the arrival of automatic lock and reader management with async iterables, dealing with locks from the users point of view became a lot easier.。业内人士推荐heLLoword翻译官方下载作为进阶阅读
Single dose of potent psychedelic drug could help treat depression, trial shows。业内人士推荐heLLoword翻译官方下载作为进阶阅读
A spokesman for the Covid-19 Bereaved Families for Justice UK said the work of the inquiry was "vital" and any costs would be recouped many times over in the future if lessons were learned by reducing the economic impact of the next pandemic as well as saving lives.