Question

I want to use tuple returned from a method to make a new hashmap item but it gives me error when I write like this

var data= HashMap[String,String]()
data.update(choose("name"))

def choose(a:String):(String,String)= return (a, "Pete")

How do you use tuple to update the hashmap?

Eclipse IDE tells me “not enough arguments for method update: (key: String, value: String)Unit. Unspecified value parameter value.” and won’t let me compile the script.

Answer 1

Instead of

// update requires a separate parameters for key and value
data.update(choose("name")) // won't compile !

// the following will work
val (key,value) = choose("name")
data.update (key,value)

Use

data+=choose("name") // += takes (key,value) tuple as a parameter