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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charlie
2026-03-13 11:09:19 +08:00
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# 练习 13数组高阶函数
## 目标
学会使用数组高阶函数处理一组数据。
## 你要练什么
- `map()`
- `filter()`
- `reduce()`
- `find()`
- `some()`
- `every()`
## 任务
请完成一个“学习成绩分析”脚本,要求:
-`map` 生成带单位的新数组
-`filter` 找出及格成绩
-`reduce` 计算总分
-`find` 找出第一条大于等于 90 的成绩
-`some` 判断是否有人不及格
-`every` 判断是否全部完成考试
## 文件
- [starter.js](/Users/lijiaqing/home/wwwroot/front-end-example/03-javascript-core/13-array-high-order-methods/starter.js)
- [answer.js](/Users/lijiaqing/home/wwwroot/front-end-example/03-javascript-core/13-array-high-order-methods/answer.js)