scala 逗号分隔字符串到双引号逗号分隔字符串

Question

I have a file which contains certain string like -

Apple
Google
Microsoft

I am reading in this file as

val lines = scala.io.Source.fromFile(filePath).mkString.replace("\n", ",")

Which results in a comma separated list of string. However what I really want is "Apple","Google","Microsoft"

If I add double quotes in the string replace while reading in the file I while have to take care of the first and last double quotes which won't be ideal. How should I go about this?

Answer 1

One option is to load each line into an Iterator and then let mkString apply the commas and quote marks.

io.Source
  .fromFile(filePath)
  .getLines()
  .mkString("\"","\",\"","\"")
//res0: String = "Apple","Google","Microsoft"

Answer 2

Similar to jwvh's answer but with Using for resource management

import scala.util.Using
import scala.io.Source

Using.resource(Source.fromFile(filePath)) { file =>
  file.getLines.map(line => s""""$line"""").mkString(",")
}