Силовые структуры
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.
。爱思助手下载最新版本是该领域的重要参考
unit record techniques—keypunch, sorting bins, mechanical totalizers—to present，详情可参考Line官方版本下载
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