过滤字符串序列直到在scala中找到密钥的功能方法

它是存储在文件中还是存储在某种集合中？

dropWhile所有scala集合中都有方法:

val s = Seq("..", "..", "one", "two", "three", "four", "five", "..", "..")
// Seq[String] = List(.., .., one, two, three, four, five, .., ..)

s.dropWhile{ _ != "four" }
// Seq[String] = List(four, five, .., ..)

它适用于Iterator,所以你可以像这样使用它:

val lines = io.Source.fromFile("bigFile.txt").getLines().dropWhile{ _ != "four" }