StackOverflow 文档 Haskell Language 教程 容器 - Data.Map 删除元素 删除元素 Created: November-22, 2018 > let m = Map.fromList [("Alex", 31), ("Bob", 99)] fromList [("Alex",31),("Bob",99)] > Map.delete "Bob" m fromList [("Alex",31)] 导入模块插入元素