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Just a quick note today that if you want to create a mutable Scala array -- particularly an array that can grow in size after you first declare it -- you need to use the Scala ArrayBuffer class instead of the Array class, which can't grow.
Here's a short example of how to instantiate an ArrayBuffer object, then add elements to the array:
import scala.collection.mutable.ArrayBuffer var fruits = ArrayBuffer[String]() fruits += "Apple" fruits += "Banana" fruits += "Orange"
Once you have an ArrayBuffer object, you can generally use it like an Array, getting elements like this:
println(fruits(0))
getting the array length like this:
println(fruits.length)
and so on.
Again, the only trick here is knowing that you can't add elements to a Scala array, and therefore, if you want to grow an array, you need to use the ArrayBuffer class instead.
