这些写法要么啰嗦、要么有副作用，而 Array.at (-1) 用一行代码把这个高频需求变成了语言原生的能力。 在实际 code review 中，我已经逐步要求团队在需要取首尾元素、取距末尾第 n 个元素的场景统一改用 at () ，代码可读性提升非常明显。

// Most asked problems at FAANG companies: https://docs.google.com/spreadsheets/d/1hzP8j7matoUiJ15N-RhsL5Dmig8_E3aP/edit#gid=1377915986 ...

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Attackers compromised three country-code top-level domains (ccTLDs) and obtained unauthorized HTTPS certificates for several Google domains, Google said on October 6 . Google's own systems were not ...