scala - Extract words from word-Dictionary Line-By Line -

i have 2 files, 1 has summary (contains many rows extracted csv file) , other has list of words (in row in csv file). read both files, , got array[string] each one:

val summary: array[string] = ... val wordlist: array[string] = ... 

for each line in summary, want extract list of words exist in wordlist,

sample data in summary:

hi how good.how you. have tea. 

sample data in wordlist:

good tea 

expected result:

you good,you like,tea 

as points out, don't need spark:

import scala.collection.mutable.arraybuffer  val results = summary.map(l => {   var result = arraybuffer[string]();   wordlist.foreach(w => {if (l.contains(w)) result.append(w)});   result.toarray.mkstring(",") }).filter(l => l.length > 0)