Anonymous Functions

Source: http://en.csharp-online.net/FSharp_Functional_Programming%E2%80%94Anonymous_Functions
and
http://novemberborn.net/sifr/explained/terminology

Anonymous Functions are used when it is not necessary to give a name to a function, so these are referred to as anonymous functions and sometimes called lambda functions or even just lambdas.

function(msg){ alert(msg); }("hello world");