A Tour of Scala - an interactive scala tutorial

13 Anonymous Functions 2

The first example is a method definition as we’ve seen before
The second, is like the previous slide, only assigned to a val, this is very, very roughly like the difference between
```
function foo(x, y) { 
    return x + y; 
}
```
and
```
var foo = function(x, y) { 
    return x + y; 
}
```
in JavaScript.
The third, was briefly demonstrated in the previous slide, uses the shorter _ placeholder syntax. However the usage on the left is rare in Scala, the _ notation for anonymous functions is mostly useful when passing them as parameter to higher order functions (functions that recieve or return other functions)