Scala: what is the best way to append an element to an Array?

You can use :+ to append element to array and +: to prepend it:

0 +: array :+ 4

should produce:

res3: Array[Int] = Array(0, 1, 2, 3, 4)

It's the same as with any other implementation of Seq.

arrays scala append

val array2 = array :+ 4//Array(1, 2, 3, 4)

Works also "reversed":

val array2 = 4 +: arrayArray(4, 1, 2, 3)

There is also an "in-place" version:

var array = Array( 1, 2, 3 )array +:= 4//Array(4, 1, 2, 3)array :+= 0//Array(4, 1, 2, 3, 0)

arrays scala append

The easiest might be:

Array(1, 2, 3) :+ 4

Actually, Array can be implcitly transformed in a WrappedArray

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