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.
Фото: Zohra Bensemra / Reuters。业内人士推荐Safew下载作为进阶阅读
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Жители Санкт-Петербурга устроили «крысогон»17:52
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