Array initializing in Scala

Question

I m new to Scala  just started learning it today I would like to know how to initialize an array in Scala   Example Java code  String   arr      Hello    World       What is the equivalent of the above code in Scala

User · Answer

If you know Array s length but you don t know its content  you can use   val length   5 val temp   Array ofDim String  length    If you want to have two dimensions array but you don t know its content  you can use  val row   5 val column   3 val temp   Array ofDim String  row  column    Of course  you can change String to other type    If you already know its content  you can use  val temp   Array  a    b

User · Answer

scala gt  val arr   Array  Hello   World   arr  Array java lang String    Array Hello  World

User · Answer

To initialize an array filled with zeros  you can use    gt  Array fill Byte  5  0  Array 0  0  0  0  0    This is equivalent to Java s new byte 5

User · Answer

Additional to Vasil s answer  If you have the values given as a Scala collection  you can write  val list   List 1 2 3 4 5  val arr   Array Int  list     println arr mkString    But usually the toArray method is more handy   val list   List 1 2 3 4 5  val arr   list toArray println arr mkString

User · Answer

Can also do more dynamic inits with fill  e g   Array fill 10  scala util Random nextInt 5           Array Int    Array 0  1  0  0  3  2  4  1  4  3

User · Answer

Another way of declaring multi-dimentional arrays   Array fill 4 3       res3  Array Array String     Array Array              Array             Array              Array

[scala] Array initializing in Scala

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