feat: Add JavaScript core exercises and solutions
- Implemented exercises for array high-order methods, memory and execution, switch statements, and final review. - Added starter and answer files for each exercise to facilitate learning. - Created a runner HTML file to execute JavaScript code and display console outputs. - Updated README files to include exercise objectives, tasks, and usage instructions.
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03-javascript-core/05-functions/README.md
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03-javascript-core/05-functions/README.md
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# 练习 5:函数
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## 目标
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学会把一段逻辑封装成函数,并通过参数和返回值复用它。
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## 你要练什么
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- 函数声明
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- 参数
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- `return`
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- 函数调用
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## 任务
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请完成一个“学习成绩处理器”,要求:
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- 写一个 `getAverage` 函数
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- 接收 3 个分数参数
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- 返回平均分
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- 再写一个 `getLevel` 函数
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- 根据平均分返回“优秀”“良好”“继续努力”
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## 文件
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- [starter.js](/Users/lijiaqing/home/wwwroot/front-end-example/03-javascript-core/05-functions/starter.js)
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- [answer.js](/Users/lijiaqing/home/wwwroot/front-end-example/03-javascript-core/05-functions/answer.js)
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