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front-end-example/05-es6-plus/03-arrow-functions/README.md
charlie f3bdaa4e88 feat: add TypeScript lessons and learning panel 
- Introduced a new script to check TypeScript lesson files for errors.
- Created a main TypeScript file to render lessons and their details.
- Added lesson definitions with starter and answer codes.
- Implemented a user interface for navigating and running lessons.
- Styled the application with CSS for a better user experience.
- Updated README to reflect the new TypeScript section and usage instructions.
2026-03-19 10:06:11 +08:00

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练习 3：箭头函数

目标

学会把简单函数改写成箭头函数。

你要练什么

  • 箭头函数
  • 简写返回值
  • 数组映射

任务

  • 把两个普通函数改成箭头函数
  • 用 map 和箭头函数生成课程标签

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