Scala multiple assignment to existing variable

Question

I can do something like

def f(): Tuple2[String, Long] = ...
val (a, b) = f()

What about if the variables are already existing? I\'m runnin

Answer 1

The workaround I found is this:

// declare as var, not val
var x = (1,"hello")  
// x: (Int, String) = (1,hello)

// to access first element
x._1
// res0: Int = 1

// second element
x._2
// res1: String = hello

// now I can re-assign x to something else
x = (2, "world")
// x: (Int, String) = (2,world)

// I can only re-assign into x as long the types match
// the following will fail

x = (3.14, "Hmm Pie")
:8: error: type mismatch;
 found   : Double(3.14)
 required: Int
       x = (3.14, "Hmm Pie")