所以我有这个 2 collections
:
import collection.mutable.ListBuffer
val list1 = ListBuffer[(String, String)]()
list1 += (("Italy", "valid"))
list1 += (("Germany", "not valid"))
list1 += (("USA", "not valid"))
list1 += (("Romania", "valid"))
val list2 = ListBuffer[String]()
list2 += "Germany"
list2 += "USA"
list2 += "Romania"
list2 += "Italy"
list2 += "France"
list2 += "Croatia"
我想获得包含特定国家的新列表,condition
例如valid
,结果将是新列表:
Italy, Romania