How do I create a heterogeneous Array in Scala?

Question

In javascript, we can do:

[\"a string\", 10, {x : 1}, function() {}].push(\"another value\");

What is the Scala equivalent?

Answer 1

Scala will choose the most specific Array element type which can hold all values, in this case it needs the most general type Any which is a supertype of every other type:

Array("a string", 10, new { val x = 1 }, () => ()) :+ "another value"

The resulting array will be of type Array[Any].