Fancy is a new general-purpose programming language inspired by Smalltalk, Ruby, Io and Erlang that runs on the Rubinius VM. It has first-class integration support with Ruby and any Ruby libraries supported by Rubinius, including most C-extensions. Fancy is a dynamic, pure object-oriented, class-based programming language with built-in support for futures and actors. The syntax is easy to learn, consistent and is mostly inspired by Ruby and Smalltalk.
Hello World
"Hello, World!" println
Fibonacci
class Fixnum {
def fib {
match self {
case 0 -> 0
case 1 -> 1
case _ -> self - 1 fib + (self - 2 fib)
}
}
}
15 times: |x| {
x fib println
}
Class example
class Greeter {
def initialize: @name
def greet {
"Hello, #{@name}" println
}
}
g = Greeter new: "World!"
g greet # => "Hello, World!"
Write web apps with Sinatra.fy
require: "sinatra.fy"
configure: 'production with: {
disable: 'show_errors
enable: 'logging
}
set: 'port to: 3000
before: {
"incoming request: #{request inspect}" println
}
def page: text {
"""
<html>
<body>
<h1>#{text}</h1>
</body>
</html>
"""
}
get: "/:p" do: |param| {
page: "Fancy web page: #{param}"
}
not_found: {
page: "Invalid request URL."
}
Actors
class Ring {
class Node {
def initialize: @next ring: @ring
def count: count {
match @next {
case nil ->
"DONE: " ++ count println
@ring finish!
case _ ->
"." print
@next @@ count: (count + 1)
}
die! # let this actor die to free resources
}
}
def initialize: amount {
node = nil
amount times: {
node = Node new: node ring: self
}
@start = node
}
def start: @parent {
@start count: 1
}
def finish! {
@parent run
}
}
# create ring and run through it
ring = Ring new: 4000
ring start: $ Thread current
Thread stop # wait until finished
Last modified 16 December 2024