Scala: how to handle many params that can be None

Question

Right now I have many params that can be none, and I want to assign the whole expressiona default value. Right now I'm doing things like ``` var name: Option[String] = None var surname: Option[String] = Some("Smith") val fullName:String = { name.map { name => surname.map { surname => surname + ", " + name }.getOrElse("unknown") }.getOrElse("unknown") } ``` but it's a bit too verbose. I'd like to know what would be a more idiomatic and elegant way to handle it, ideally it would be something like (it's pseudo code, of course!): ``` val fullName = (name + ", " + surname).getOrElse("unknown") ``` or something similar... (just avoiding the double .getOrElse would be great...)

Accepted Answer

How about this

```
scala> val fullName = (for(n <-name;s <-surname) yield n + s).getOrElse("unknown")  
fullName: String = unknown
```

Scala: how to handle many params that can be None

Solution

Problem