可辨识联合（Disjoint Union，又称 variant / tagged union）是 Flow 在 0.13.1 版本引入的核心类型能力：它允许开发者用一组由"哨兵属性"（sentinel）区分的对象类型描述不同形态的数据，并借助 === 等动态检查让 Flow 自动收窄（narrow）对象的可能形态。本文将以官方博客 ...

导读：IIFE（Immediately Invoked Function Expression，立即调用函数表达式）是 JavaScript 中最经典也最常被误解的函数技巧之一。本文以 iife.md为骨架，结合本仓库中 arrow-functions.md、closures.md、use-strict.md等相关章节与源码级细节，系统拆解 IIFE 的语法构成、执行时机、作用 ...

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Thousands of people were left disappointed on Sunday after tickets for Glastonbury Festival sold out in 42 minutes.

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Small Prophets – the hit BBC comedy conjured up by Mackenzie Crook – is to return for a second series following its stellar first run. Starring Mackenzie Crook, Sir Michael Pa ...

While Brisbane’s property prices continue to fall sharply, the depth of the slowdown is becoming clearer in underlying ...