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.
FT Digital Edition: our digitised print edition。关于这个话题,heLLoword翻译官方下载提供了深入分析
第四十七条 有下列行为之一的,处十日以上十五日以下拘留,并处一千元以上二千元以下罚款;情节较轻的,处五日以上十日以下拘留,并处一千元以下罚款:,这一点在搜狗输入法下载中也有详细论述
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