ListBuffer[ListBuffer[String]] to List[List[String]]

[hangle]

I have employed 'toList' to convert ListBuffer[String] to List[String].
I am, however, at a lost as to how to convert :
ListBuffer[ListBuffer[String]] to List[List[String]]

[Tony Morris]

Sounds hairy. You want the map method.

Post by hangle
I have employed 'toList' to convert ListBuffer[String] to List[String].
ListBuffer[ListBuffer[String]] to List[List[String]]

[Ricky Clarkson]

I'd guess you probably could write the code differently so that you
didn't need this, but:

scala> import scala.collection.mutable.ListBuffer
import scala.collection.mutable.ListBuffer

scala> val lists: ListBuffer[ListBuffer[Int]] = new ListBuffer
lists: scala.collection.mutable.ListBuffer[scala.collection.mutable.ListBuffer[Int]]
= ListBuffer()

scala> lists += new ListBuffer
res0: lists.type = ListBuffer(ListBuffer())

scala> lists(0) += 5
res1: scala.collection.mutable.ListBuffer[Int] = ListBuffer(5)

scala> lists map (_.toList) toList
res2: List[List[Int]] = List(List(5))

I have employed  'toList' to convert ListBuffer[String] to List[String].
ListBuffer[ListBuffer[String]] to List[List[String]]
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[hangle]

Post by Ricky Clarkson
I'd guess you probably could write the code differently so that you
scala> import scala.collection.mutable.ListBuffer
import scala.collection.mutable.ListBuffer
scala> val lists: ListBuffer[ListBuffer[Int]] = new ListBuffer
scala.collection.mutable.ListBuffer[scala.collection.mutable.ListBuffer[Int]]
= ListBuffer()
scala> lists += new ListBuffer
res0: lists.type = ListBuffer(ListBuffer())
scala> lists(0) += 5
res1: scala.collection.mutable.ListBuffer[Int] = ListBuffer(5)
scala> lists map (_.toList) toList
res2: List[List[Int]] = List(List(5))

I have employed  'toList' to convert ListBuffer[String] to List[String].
ListBuffer[ListBuffer[String]] to List[List[String]]
--
http://www.nabble.com/ListBuffer-ListBuffer-String---to-List-List-String---tp25507927p25507927.html
Sent from the Scala - User mailing list archive at Nabble.com.

--
Ricky Clarkson
Java Programmer, AD Holdings
[phone]
Skype: ricky_clarkson

[hangle]

Post by Ricky Clarkson
I'd guess you probably could write the code differently so that you
scala> import scala.collection.mutable.ListBuffer
import scala.collection.mutable.ListBuffer
scala> val lists: ListBuffer[ListBuffer[Int]] = new ListBuffer
scala.collection.mutable.ListBuffer[scala.collection.mutable.ListBuffer[Int]]
= ListBuffer()
scala> lists += new ListBuffer
res0: lists.type = ListBuffer(ListBuffer())
scala> lists(0) += 5
res1: scala.collection.mutable.ListBuffer[Int] = ListBuffer(5)
scala> lists map (_.toList) toList
res2: List[List[Int]] = List(List(5))

I have employed  'toList' to convert ListBuffer[String] to List[String].
ListBuffer[ListBuffer[String]] to List[List[String]]
--
http://www.nabble.com/ListBuffer-ListBuffer-String---to-List-List-String---tp25507927p25507927.html
Sent from the Scala - User mailing list archive at Nabble.com.

--
Ricky Clarkson
Java Programmer, AD Holdings
[phone]
Skype: ricky_clarkson

i had tried ' lists foreach(_ toList)toList' . when i saw the use of 'map'
i realized that i was NOT returning a List such as List[List[String]]

[Ricky Clarkson]

foreach does stuff, rather than returns stuff. You can tell this
because its return type is Unit.

Post by Ricky Clarkson
I'd guess you probably could write the code differently so that you
scala> import scala.collection.mutable.ListBuffer
import scala.collection.mutable.ListBuffer
scala> val lists: ListBuffer[ListBuffer[Int]] = new ListBuffer
scala.collection.mutable.ListBuffer[scala.collection.mutable.ListBuffer[Int]]
= ListBuffer()
scala> lists += new ListBuffer
res0: lists.type = ListBuffer(ListBuffer())
scala> lists(0) += 5
res1: scala.collection.mutable.ListBuffer[Int] = ListBuffer(5)
scala> lists map (_.toList) toList
res2: List[List[Int]] = List(List(5))

I have employed  'toList' to convert ListBuffer[String] to List[String].
ListBuffer[ListBuffer[String]] to List[List[String]]
--
http://www.nabble.com/ListBuffer-ListBuffer-String---to-List-List-String---tp25507927p25507927.html
Sent from the Scala - User mailing list archive at Nabble.com.

--
Ricky Clarkson
Java Programmer, AD Holdings
[phone]
Skype: ricky_clarkson

i had tried ' lists  foreach(_ toList)toList' .  when i saw the use of 'map'
i realized that i was NOT returning a List such as  List[List[String]]
--
View this message in context: http://www.nabble.com/ListBuffer-ListBuffer-String---to-List-List-String---tp25507927p25510697.html
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