CODEWITHSUNDEEP
scala
zell
zell

Reputation: 10204

How to convert a Scala Array to ArrayBuffer?

I see that a Scala Array can be easily converted to List, Seq etc, using the s.toList or s.toSeq. Now, I would like to convert an array to a bufferarray. How would I do it?

Upvotes: 12

Views: 11591

Answers (4)

Yastika Kumar
Yastika Kumar

Reputation: 39

For anyone that is now looking for the answer, the answer which has been accepted is deprecated. If you will try to execute it then it will execute it successfully but will give you a warning message. So either you can refer Claire Hou answer or you can use 

Array('a','b','c').toIndexedSequence

Upvotes: 0

Jasper-M
Jasper-M

Reputation: 15086

There's a generic method to that can convert between arbitrary collection types.

Array(1, 2, 3).to[ArrayBuffer]

Or from Scala 2.13 onwards:

Array(1, 2, 3).to(ArrayBuffer)

Upvotes: 21

Claire Hou
Claire Hou

Reputation: 41

please try Array(1, 2, 3).toBuffer

Upvotes: 4

WestCoastProjects
WestCoastProjects

Reputation: 63022

Use Iterable: _*:

val arr = Array(1,2,3)
arr: Array[Int] = Array(1, 2, 3)

val buf = collection.mutable.ArrayBuffer(arr: _*)
buf: scala.collection.mutable.ArrayBuffer[Int] = ArrayBuffer(1, 2, 3)

The _* means to unpack the Iterable elements. So arr: _* unpacks the elements of arr into a variable length list - which is an acceptable parameter list for `ArrayBuffer.

Upvotes: 19

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