Golo supports a compact form of closures for the cases where their body consists of a single expression. The example above can be simplified as:
let adder = |a, b| -> a + b
You may also use this compact form when defining regular functions, as in:
module Foo local function sayHello = |who| -> "Hello " + who + "!" # Prints "Hello Julien!" function main = |args| { println(sayHello("Julien")) }