CODEWITHSUNDEEP
regexlistscalafor-loopfunctional-programming
AbtPst
AbtPst

Reputation: 8018

Scala : How to convert a List[String] to List[List[String]]

I have a scala list as

scala> c
res18: List[String] = List(123  asd, 234 zxc)

and i want something like this

List(List(123,  asd),List(234, zxc))

how can i achieve that ? I tried

scala> var t = for (x <- c) x.split("\t")
t: Unit = ()

how can i split each element pf my list by space and then assign the result as a list of lists?

Upvotes: 0

Views: 560

Answers (2)

pme
pme

Reputation: 14803

An alternative is to use map, what usually is more readable if you have only one step:

c.map(_.split(" ").toList)

Upvotes: 7

Andronicus
Andronicus

Reputation: 26056

You need to use yield keyword to return a list from for loop:

var result = for (x <- c) yield x.split(" ")

But this will result in List[Array[String]], if you want to have innerList`, use:

var result = for (x <- c) yield x.split(" ").toList

Upvotes: 1

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