QuickJS 是在 MIT 许可下发的一个轻量 js 引擎包含 js 的编译器和解释器,支持最新 TC39 的 ECMA-262 标准。QuickJS 和其它 js 引擎的性能对比,可以参看 QuickJS 的 benchmark 对比结果页,从结果看,JerryScript 内存和体积小于 QuickJS,但各项性能均低于 QuickJS,Hermes 体积和内存大于 QuickJS,性能和 QuickJS 差...
很多工具和框架也都提供了响应的支持,如lodash/underscore,angular,react 等 no-complex-string-concat 3、重构后代码: var build = (id, href, text) => ` ${text} `; var build = (id, href, text) => ` ${text} `; 七、jQuery询问 1、糟糕代码: $(document).ready(function() { $('.Compon...
写作意图 起初,我分析underscore的源码只是想更深入的了解函数式编程(Functional Programming),但分析结束后,我就觉得单纯的源码注释不足以记录我的收获、理解和感悟,所以我想把这些写下来,我粗略地将写作意图概括如下: ...JavaScript30 中文指南 - 04 Array 基本操作指南 ...
import{plugin}from"bun";plugin({name:"YAML",asyncsetup(build){const{load}=awaitimport("js-yaml");const{readFileSync}=awaitimport("fs");build.onLoad({filter:/.(yaml|yml)$/},(args)=>{consttext=readFileSync(args.path,"utf8");constexports=load(text)asRecord<string,any>;return{exports,...
functioncountSymbols(string){returnArray.from(string).length;} 或者,使用解构运算符...: 代码语言:javascript 复制 functioncountSymbols(string){return[...string].length;} 使用这些实现,我们现在可以正确地计算码位,这将导致更准确的结果: 代码语言:javascript ...
functioncountSymbols(string){returnpunycode.ucs2.decode(string).length;} 在ES6 中,可以使用Array.from来做类似的事情,它使用字符串的迭代器将其拆分为一个字符串数组,每个字符串数组包含一个字符: functioncountSymbols(string){returnArray.from(string).length;} ...
For example, --mangle-props regex=/^_/ will only mangle property names that start with an underscore. When you compress multiple files using this option, in order for them to work together in the end we need to ensure somehow that one property gets mangled to the same name in all of ...
eslint: no-underscore-dangle Why? JavaScript does not have the concept of privacy in terms of properties or methods. Although a leading underscore is a common convention to mean “private”, in fact, these properties are fully public, and as such, are part of your public API contract. ...
strings (default: true)— compact string concatenations. switches (default: true)— de-duplicate and remove unreachable switch branches templates (default: true)— compact template literals by embedding expressions and/or converting to string literals, e.g. `foo ${42}` → "foo 42" top_retain...
Letter, numeral, or underscore /1\w/matches “1A” \W Not a letter, numeral, or underscore /1\W/matches “1%” . Any character except a newline /../matches “Z3” [...] Any one of the character set in brackets /J[aeiou]y/matches “Joy” ...