从2个表格列表List[(Int, String):
l1 = List((1,"a"),(3,"b"))
l2 = List((3,"a"),(4,"c"))
如何组合Integers String相同的s来获得第三个列表:
l3 = List((4,"a"),(3,"b"),(4,"c"))
现在我正在遍历两个列表并添加字符串是否相同,但我认为应该有一个简单的模式匹配解决方案.