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.
Филолог заявил о массовой отмене обращения на «вы» с большой буквы09:36，更多细节参见搜狗输入法2026
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Жители Санкт-Петербурга устроили «крысогон»17:52，这一点在同城约会中也有详细论述