Array.isArray() 是 JavaScript 标准库中判断一个值是否为数组的权威方法，本笔记源自本仓库 javascript/check-if-something-is-an-array.md。读完本文，你将掌握 Array.isArray() 的完整用法、为何它优于 typeof 与 instanceof、底层 Polyfill 的工作原理，以及它在 TypeScript ...

回调函数（callback）是 JavaScript 中无处不在的编程范式，从数组迭代到异步任务都离不开它。但“看似无害的函数直接用作回调”恰恰是 bug 的温床。本文以 30 Seconds of Code 仓库中的 callback-pitfalls.md为骨架，结合仓库源码逐层拆解 parseInt() 与 Array.prototype.map() 组合 ...

Shallow Size：对象自身占用内存的大小，不包括它引用的对象。JavaScript 对象会将一些内存用于自身的说明和保存中间值。通常，只有数组和字符串会有明显的浅层大小。 Retained Size：这是将对象本身连同其无法从 GC root 到达的相关对象一起删除后释放的内存大小。

I left the DOM castle town of JavaScript and entered the GAS Castle in the Sky.What I did this time was read values from a ...

I headed to the GAS Sky Castle again today. After passing through the DOM castle town, I am currently in the area where ...

With Antigravity IDE and its coding agents, it takes no time at all to build a functioning web app with Astro, HTMX, and ...

An open source intelligence tool called God's Eye combines global flight paths, satellite movements, marine traffic, and live ...

To work with various data in your workflows, use the built-in Data Operations actions so you don't have to write your own code. Compose Build a string or JavaScript Object Notation (JSON) object from ...

I drove its lattice-mcp tools by hand from a TypeScript client, checked every answer against grep, and hit five gotchas.

Over the past year, the world’s attention has turned to economic chokepoints—with good reason. Iran has exercised its control over the Strait of Hormuz to gum up the global economy, and China has used ...

To reduce the spread of diseases such as AIDS and hepatitis C, they handed out clean needles. To reduce the toll of overdoses ...