An observable value notifies observers of updates in a thread-safe manner. An observable can also be
constructed from another observable using the map
and filter
combinators:
let foo = Observable("Foo") foo: onChange(|v| -> println("foo = " + v)) let mapped = foo: map(|v| -> v + "!") mapped: onChange(|v| -> println("mapped = " + v)) foo: set("69")
This yields the following output:
foo = 69 mapped = 69!