文章浏览阅读47次。本文围绕《现代 JavaScript 教程》中 "过滤数组中的唯一元素"（`unique (arr)`）这一核心练习展开，系统讲解如何借助 `Set` 集合类型完成数组去重。你将掌握 `Set` 的完整 API 与迭代特性、`Array.from` 与展开运算符两种官方推荐解法、基于 `filter`/`indexOf` 的传统实现及其性能差异，并通过 ...

本篇技术指南以 Modern JavaScript Tutorial（javascript.info）仓库中 6-calculator-extendable 练习为骨架，完整剖析一个"可扩展计算器"的构造器函数实现：既能解析 "NUMBER operator NUMBER" 形式的字符串表达式，又能通过 addMethod 在运行时动态注册新运算符。读完本文，你将掌握 ...

之前写过第一个 Agent 从 Pi 开始，没想到续篇来得这么快。Pi 1.0 带来了一系列新特性，从工具编排到扩展机制，都为 Agent 开发提供了值得借鉴的思路，也值得再写一篇深入聊聊。Pi 1.0 发布从拒绝 MCP 到内置支持，Pi ...

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