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.
"It's a period where the history is not yet written," says Dr Seaman.
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“如今村里的重大决策，我们都要听取村民的意见。免费安装灯笼，也是征求意见并获得超一半村民同意后才实施的。”全国人大代表、黄旗滩村党支部书记薛志龙说。通过村级事务管理平台“善治美”手机小程序，黄旗滩村的村民们提问题、说意见，同时，村里还会发放纸质的群众诉求卡。