Scala List of tuples to flat list

Question

I have list of tuple pairs, `List[(String,String)]` and want to flatten it to a list of strings, `List[String]`.

Accepted Answer

Some of the options might be: concatenate:

```
list.map(t => t._1 + t._2)
```

one after the other interleaved (after your comment it seems you were asking for this):

```
list.flatMap(t => List(t._1, t._2))
```

split and append them:

```
list.map(_._1) ++ list.map(_._2)
```

Solution