摘要：
对不可变变量赋值，就会报错 [31merror[0m: cannot assign to immutable value [36m==>[0m a.cj:8:20: [36m| [0m[36m8[0m [36m| [0m case 77 => a = 'a77'[0m [36 阅读全文
摘要：
参考：https://txwtech.blog.csdn.net/article/details/140757790 [31merror[0m: non-exhaustive patterns [36m==>[0m a.cj:7:14: [36m| [0m[36m7[0m [36m 阅读全文