chore: use pattern matching (ch4) in ch5

#465Pull Requestd-s-d 创建于 2023-12-05已合并

d-s-dcommented

Chapter4 (Pattern Matching) and Chapter5 were swapped. Consequently, Ch5 should use pattern matching. Should fix #462 .

合并状态:已合并合并于 2023-12-09 关闭于 2023-12-09 1 条评论