group by 是一个很常见的功能,但 JS 却没有 build-in 的方法,一直到 es2024 才有 Object.groupBy (前生是 Array.prototype.group) 和 Map.groupBy (前生是 Array.prototype.groupToMap)。 目前所有 modern browser 都支持了这个功能。 如果想兼容 IOS 17.4 以下,可以使用core-js polyfill。 参考 ECMAScript 2...
由于QuickJS 使用的是 makefile 管理,而 makefile 不能直接转成 Xcode 的工程文件,因此需要使用 Xcode 的 External Build System,创建工程 QuickJSXcode 后,给工程添加 QuickJS 源码文件,直接导入到工程即可,使用 ⌘ + B 构建工程,在 Product/Scheme/Edit Scheme 里选择 Run/Info,在 Executable 里选择刚才构建生...
JSAutoCompartment ac(cx, global); // Populate the global object with the standard globals, like Object and // Array. if (!JS_InitStandardClasses(cx, global)) return 1; // Your application code here. This may include JSAPI calls to create your // own custom JS objects and run scripts...
Build things. Lots of things. Build 1,000 things. Keep it up and don't stop. Seriously. This has always been my advice. Just put in the work and you will get better. But Wes, what should I build? I have no ideas! Please don't make me do another todo app. ...
Array Explorer and Object Explorer - Resources to help figure out what native JavaScript method would be best to use at any given time. Clipboard.js - "Copy to clipboard" without Flash or use of Frameworks. ky - Tiny and elegant HTTP client based on the browser Fetch API. Fcal - Math ...
import { Serializer } from 'example-library';/*** An interface describing a widget.* @public*/export interface IWidget {/*** Draws the widget on the display surface.* @param x - the X position of the widget* @param y - the Y position of the widget*/public draw(x: number, y: ...
//Function also equals to Number.constructor, String.constructor, Array.constructor, RegExp.constructor, etc. function fn(){} Function==fn.constructor //result: true 这说明了几个问题: Function指向系统内置的函数构造器(build-in Function constructor);Function具有自举性;系统中所有函数都是由Function构造...
An array of objects which provide the package name and its location. Example // Set the path for the worker's AMD loader configuration // to a folder called workersFolder. esriConfig.workers.loaderConfig = { paths: { myWorkers: new URL("./workersFolder", document.baseURI).href } }; ...
Converting structs to objects Complete embedding example Build stand-alone mJS binary Licensing See also Technical guides mJS: Restricted JavaScript engine Overview mJS is designed for microcontrollers with limited resources. Main design goals are: small footprint and simple C/C++ interoperability. mJS im...
Suppose, we have an array of objects like this − const arr = [ { id: '1', name: 'name 1', parentId: null }, { id: '2', name: 'name 2', parentId: null }, { id: '2_1', name: 'name 2_1', parentId: '2' }, ...