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if (pending.length 0) yield [pending];
。搜狗输入法2026是该领域的重要参考
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Additional reporting by Ema Sabljak, BBC England Data Unit
This is fundamentally different from Web streams' pipeThrough(), which starts actively pumping data from the source to the transform as soon as you set up the pipe. Pull semantics mean you control when processing happens, and stopping iteration stops processing.