"I didn't realise it would be so guitar heavy. Obviously his mum's a singer, and I thought he would just be a frontman. It seems he's got this little 60s twang, so I suppose he's trying to break away from that pop culture that his mum created in the 90s."
.pipeThrough(transform) // more buffers filling...
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4. 从后向前遍历原数组，按count位置放入结果数组