Question

How to resize an array in Scala

Answer 1

import scala.collection.mutable.ArrayBuffer

val buffer = ArrayBuffer(1, 2, 3, 4, 5, 6)

println(buffer)  

buffer ++= Array.fill(3)(0)  // Resize to 9 by adding 3 zeros

println(buffer)  



/*
run:

ArrayBuffer(1, 2, 3, 4, 5, 6)
ArrayBuffer(1, 2, 3, 4, 5, 6, 0, 0, 0)

*/

 

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Answer 2

val original = Array(1, 2, 3, 4, 5, 6)
val newSize = 10

// Create a New Array and Copy

val resized = new Array[Int](newSize) 

Array.copy(original, 0, resized, 0, original.length)

println(resized.mkString(", "))  



/*
run:

1, 2, 3, 4, 5, 6, 0, 0, 0, 0

*/

 

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