Question

How to add elements to an array in Scala

Answer 1

val aarr = Array(10, 20, 30)
val barr = aarr :+ 14

println("aarr:")
for (n <- aarr) {
  println(n)
}

println("barr:")
for (n <- barr) {
  println(n)
}



 
/*
run:

aarr:
10
20
30
barr:
10
20
30
14

*/

 

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Answer 2

val aarr = Array(10, 20, 30)
val barr = aarr :+ 14
val carr = barr ++ Array(500, 600)

println("aarr:")
for (n <- aarr) {
  println(n)
}

println("barr:")
for (n <- barr) {
  println(n)
}

println("carr:")
for (n <- carr) {
  println(n)
}


 
/*
run:

aarr:
10
20
30
barr:
10
20
30
14
carr:
10
20
30
14
500
600


*/

 

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Answer 3

val aarr = Array(10, 20, 30)
val barr = aarr :+ 14
val carr = barr ++ Array(500, 600)
val darr = 3 +: carr

println("aarr:")
for (n <- aarr) {
  println(n)
}

println("barr:")
for (n <- barr) {
  println(n)
}

println("carr:")
for (n <- carr) {
  println(n)
}

println("darr:")
for (n <- darr) {
  println(n)
}



 
/*
run:

aarr:
10
20
30
barr:
10
20
30
14
carr:
10
20
30
14
500
600
darr:
3
10
20
30
14
500
600

*/

 

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Answer 4

val aarr = Array(10, 20, 30)
val barr = aarr :+ 14
val carr = barr ++ Array(500, 600)
val darr = 3 +: carr
val earr = Array(888, 999) ++: darr

println("aarr:")
for (n <- aarr) {
  println(n)
}

println("barr:")
for (n <- barr) {
  println(n)
}

println("carr:")
for (n <- carr) {
  println(n)
}

println("darr:")
for (n <- darr) {
  println(n)
}

println("earr:")
for (n <- earr) {
  println(n)
}


 
/*
run:

aarr:
10
20
30
barr:
10
20
30
14
carr:
10
20
30
14
500
600
darr:
3
10
20
30
14
500
600
earr:
888
999
3
10
20
30
14
500
600

*/

 

70+ SQL courses for beginners and professionals