Extract list of string into multiple list

Question

I have a scala list which looks like:

val list = List("2.56.7", "1.34.67")

I want a O/P like this:

List(List("2", "56", "7"), List("1", "34", "67")

I tried the below snippet but didnt work:

list.map(_.split("\\."))

I want a O/P like this:

List(List("2", "5", "6"), List("1", "34", "67")

I don't follow your logic. Can you better explain the transformation from the initial list into the output you expect? — Tim Biegeleisen
– Tim Biegeleisen, Commented Dec 25, 2018 at 5:03
i want to unpack all elements based on . so it has to look like [2, 56, 7], [ 1, 34, 67] . to be precise i want to split based on . for all elem in list] — Raja Sabarish PV
– Raja Sabarish PV, Commented Dec 25, 2018 at 5:11
I was able to get something working below. I'm not a Scala person, by the way. — Tim Biegeleisen
– Tim Biegeleisen, Commented Dec 25, 2018 at 5:20

Tim · Accepted Answer · 2018-12-25 07:40:22Z

4

Your code is almost right, but split returns Array not List so you need to convert the result to List.

list.map(_.split("\\.").toList)

answered Dec 25, 2018 at 7:40

Tim

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Comments

Tim Biegeleisen · Accepted Answer · 2018-12-25 05:19:21Z

1

Here is a working script. We can try using map on the outer list, with a lambda which maps each string to a another map of elements.

val list = List("2.56.7", "1.34.67")
val result = list.map(x => x.split("\\.").map(_.trim).toList)

def printList(args: List[_]): Unit = {
  args.foreach(println)
}
printList(result)

List(2, 56, 7)
List(1, 34, 67)

answered Dec 25, 2018 at 5:19

Tim Biegeleisen

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3 Comments

Raja Sabarish PV Over a year ago

wow fantastic this is what i want. Thanks a lot +1 @Tim Biegeleisen

Raja Sabarish PV Over a year ago

sure. Can i apply a sort based on each element of sub-list ?

Tim Biegeleisen Over a year ago

What is the new output you want? Also, if it be very different than your original question, you might want to open a new question.

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