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.
Credit: Samsung，这一点在WPS官方版本下载中也有详细论述
The UK government has been investing heavily in renewable energy in its bid to meet 95% of electricity demand with clean power by 2030.，推荐阅读同城约会获取更多信息
Фото: Сергей Бобылев / РИА Новости
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