"When I was 17, I was at a girl's school and I had a friend who was a singer, and she wanted someone to produce for her. And I was like, 'I'll do it'," she recalls.
The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
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热气腾腾的煎饼摊、干净敞亮的菜市场、随处可见的口袋公园、社区小广场上欢快起舞的居民……“看得出来，他们中的大多数人都生活惬意、积极向上，这样的中国很温暖。”骑着共享单车，途经天津的大街小巷，所见的一幕幕，让格雷格如是感慨。