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Lebab is a JavaScript code modernization tool that converts older ES5 syntax into contemporary ES6 equivalents. It operates as a source-to-source transpiler, parsing code into an abstract syntax tree, applying structural transformations, and regenerating the output without intermediate representations or runtime dependencies. The tool distinguishes itself through a rule-driven pipeline of independent transformation rules, each targeting a specific ES6 feature like arrow functions, let/const, classes, or modules. It provides a programmatic API that accepts source code and an array of transform

Tern 是一个独立于编辑器的 JavaScript 代码分析器和静态分析引擎。它作为一个语言服务器，通过将源代码解析为抽象语法树（AST）来推断类型并解析符号，从而提供语义智能，且无需手动编写类型注解。 该引擎的独特之处在于使用基于 JSON 的类型定义，这使得它无需原始源代码即可描述库签名和外部依赖。它还具备插件系统，支持扩展服务器功能以支持自定义加载器或框架。 该项目涵盖了代码导航、重构和编辑器自动补全等广泛功能。它提供的服务包括定位符号定义、查找代码引用，以及基于推断的表达式类型提供函数参数提示和补全。

This project is a self-hosted application performance monitoring tool designed for Ruby on Rails environments. It functions as a diagnostic platform that tracks request response times, database query efficiency, and background job performance to help identify bottlenecks within web application infrastructure. The tool distinguishes itself by integrating directly into the framework to provide real-time performance insights and developer-focused utilities, such as direct navigation from error reports to the corresponding lines in a code editor. It supports complex analysis by correlating perfor