Transform backpressure gaps: Pull-through transforms execute on-demand. Data doesn't cascade through intermediate buffers; it flows only when the consumer pulls. Stop iterating, stop processing.
* @param {string} num 非负整数的字符串形式（可能含前导零），这一点在safew官方下载中也有详细论述
Before diving into API design, it's worth asking: what is a stream?，详情可参考搜狗输入法2026
:first-child]:h-full [&:first-child]:w-full [&:first-child]:mb-0 [&:first-child]:rounded-[inherit] h-full w-full
（图源：长春高新 2021 年年度报告）