scala - Convert Map to 2D array

Question

I tried to convert my map:

private var map=Map[String,Double]()

into 2D array, but i had trouble doing it. Can someone help me please or give me and example of how it's done? I also had trouble in creating the array, so if you can help me with that i'll be glad.

Thank you for your time, and have a good day! :)

What are the inputs and what are the outputs (can you provide example, how exactly array should be formated)? What have you tried? — om-nom-nom
– om-nom-nom, Commented Jan 12, 2013 at 17:28

BeniBela · Accepted Answer · 2013-01-12 17:32:12Z

8

The toArray method looks promising:

  res6: scala.collection.immutable.Map[java.lang.String,Double] = Map(a -> 1.1, b -> 2.2, c -> 3.0)

  scala> res6.toArray
  res7: Array[(java.lang.String, Double)] = Array((a,1.1), (b,2.2), (c,3.0))

And if you really want an Array instead of tuples:

  scala> res6.toArray.map(x => Array(x._1, x._2))
  res8: Array[Array[Any]] = Array(Array(a, 1.1), Array(b, 2.2), Array(c, 3.0))

answered Jan 12, 2013 at 17:32

BeniBela

17.1k4 gold badges48 silver badges55 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Nick H Over a year ago

Alternative syntax to avoid using _1 and _2: res6.toArray.map{ case(a,b) => Array(a,b) }

om-nom-nom Over a year ago

@Nick or res6.toArray.map(x => x.productElements.toArray)

BeniBela Over a year ago

@om-nom-nom: actually productElements is deprecated and does not exist anymore in 2.10 (now it is called productIterator)

Collectives™ on Stack Overflow

scala - Convert Map to 2D array

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related