Scala 如何在RDD中围绕文本的引号？

我有一个RDD，里面有几行文字。文本来自文本文件，并且具有新的换行符（返回）。我希望在RDD的第一个单词和最后一个单词上加引号

val fileRdd = sc.textFile("file://data/sample.txt")
val newRdd = fileRdd

文本文件中的示例输入。请注意，文本文件中有新行或返回：

 I once did an interview for the Banbury Herald. I must look it out one of these days, for the biography. 

Strange chap they sent me. A boy, really. As tall as a man, but with the puppy fat of youth. 

It was nightfall now and I must go home.    

RDD中的预期输出：

“I once did an interview for the Banbury Herald. I must look it out one of these days, for the biography. 

Strange chap they sent me. A boy, really. As tall as a man, but with the puppy fat of youth. 

It was nightfall now and I must go home.”    

---

我想要的是在第一个和最后一个单词上加引号，并将其存储在新的RDD数据类型中。你能帮我解决这个问题吗？

如果上游没有洗牌，你可以，但这没有任何意义。如果你发现自己在思考顺序、开始、结束和类似的概念，你就处于一种顺序思维模式中，这根本不适合Spark

也就是说：

val fileRdd = sc.parallelize(Seq(
  "I once did an interview for the Banbury Herald. I must look it out one of these days, for the biography.",
  "Strange chap they sent me. A boy, really. As tall as a man, but with the puppy fat of youth.",
   "It was nightfall now and I must go home."
))

查找计数：

val n = fileRdd.count

zipWithIndex

和

map

：

val withQuotes = fileRdd.zipWithIndex.map {
  case (line, 0) => "\"" + line
  case (line, m) if m == n - 1 => line + "\""
  case (line, _) => line
}

---

没有帮你吗？是的。非常感谢。