“This is a simple fact that has grave consequences for developers and others,” he told TechCrunch. “You don’t know where you can safely run projects without the danger that something might happen where it gets blocked, and suddenly you’re scrambling to find a way.”
栈（stack）是先进后出的数据结构。单调栈在入栈时通过一定规则保持栈内元素有序（单调递增或单调递减），从而把「找左侧/右侧第一个更大/更小元素」从 O(n²) 降到 O(n)。
。业内人士推荐safew官方下载作为进阶阅读
不止手机，笔记本电脑也曾经尝试过硬件集成的防窥功能，惠普当年的 Sure View 技术方案就是其中一例：
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