Ch 6 listing from Advanced Analytics with Spark generates error. The listing
is
def plainTextToLemmas(text: String, stopWords: Set[String],pipeline:
StanfordCoreNLP) : Seq[String] = { val doc = newAnnotation(text)
pipeline.annotate(doc) val lemmas = newArrayBuffer[String]() val
sentences =doc.get(classOf[SentencesAnnotation]) for (sentence <-sentences;
token <- sentence.get(classOf[TokensAnnotation])) { val lemma
=token.get(classOf[LemmaAnnotation]) if (lemma.length> 2 &&
!stopWords.contains(lemma) && isOnlyLetters(lemma)) { lemmas
+=lemma.toLowerCase } } lemmas }
The error is
<console>:37: error: value foreach is not a member of
java.util.List[edu.stanford.nlp.util.CoreMap]
for (sentence <- sentences; token <- sentence.get(classOf[TokensAnnot
ation])) {
^
