在对象数组上跳过的映射

# 假设我们有一个包含多个学生对象的数组
students = [
    {"name": "Alice", "age": 18},
    {"name": "Bob", "age": 20},
    {"name": "Charlie", "age": 19},
    {"name": "David", "age": 22}
]

# 使用列表推导式和条件判断来跳过年龄大于等于20的学生对象，并将其他学生对象的姓名映射为大写
mapped_names = [student["name"].upper() for student in students if student["age"] < 20]

# 打印结果
print(mapped_names)  # 输出: ["ALICE", "CHARLIE"]