feat:ChatGPT第 9 课：sortBy、sortWith、groupBy

src/main/scala/practise9/exercises/Exercises3.scala

@@ -0,0 +1,32 @@
+package practise9.exercises
+/*
+* 练习 3：学生成绩排序
+
+给：
+val students = List(
+  ("Tom", 80),
+  ("Jack", 95),
+  ("Alice", 70),
+  ("Bob", 85)
+)
+
+使用 sortBy 按成绩从低到高排序：
+(Alice,70)
+(Tom,80)
+(Bob,85)
+(Jack,95)
+
+提示：
+_._2*/
+object Exercises3 {
+  def main(args: Array[String]): Unit = {
+    val students = List(
+      ("Tom", 80),
+      ("Jack", 95),
+      ("Alice", 70),
+      ("Bob", 85)
+    )
+    val result = students.sortBy(_._2)
+    println(result)
+  }
+}