No custom ReadableStream class with hidden internal state. A readable stream is just an AsyncIterable. You consume it with for await...of. No readers to acquire, no locks to manage.
On top of that, we can get two full pixels of color using foreground and background colors. If we render an upper block with a foreground color of cyan and a background color of red, we get a cyan pixel sitting on top of a red pixel!。业内人士推荐safew官方版本下载作为进阶阅读
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// 原因：先处理右侧元素（含循环部分），把结果存在栈里，供左侧元素直接使用，详情可参考搜狗输入法2026
const stack = [];