Question

How to insert an element at a specific index in an array with Scala

Answer 1

import scala.collection.mutable.ArrayBuffer

val array = Array(4, 9, 8, 6, 5, 7)
val index = 2
val element = 100

val buffer = ArrayBuffer(array: _*)
buffer.insert(index, element)
val newArray = buffer.toArray

println(newArray.mkString(", ")) 




/*
run:

4, 9, 100, 8, 6, 5, 7
 
*/

 

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Answer 2

import scala.collection.mutable.ListBuffer

val array = Array(4, 9, 8, 6, 5, 7)
val index = 2
val element = 100

val buffer = ListBuffer(array: _*)
buffer.insert(index, element)
val newArray = buffer.toArray

println(newArray.mkString(", "))



/*
run:

4, 9, 100, 8, 6, 5, 7
 
*/

 

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Answer 3

val array = Array(4, 9, 8, 6, 5, 7)
val index = 2
val element = 100

val newArray = array.slice(0, index) ++ Array(element) ++ array.slice(index, array.length)

println(newArray.mkString(", ")) 



/*
run:

4, 9, 100, 8, 6, 5, 7
 
*/

 

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