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Reia

Reia - Programming language

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Reia is a programming language created in 2008.

#459on PLDB 15Years Old 899Users
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Ruby-like hybrid OOP/functional programming language for BEAM, the Erlang VM


Example from the web:
# Hello, world! "Hello, world!".puts() # Assignment number = 42 opposite = true # Conditions number = -42 if opposite # Lists (stored as immutable singly-linked lists) list = [1, 2, 3, 4, 5] # Tuples (think of them as immutable arrays) tuple = (1, 2, 3, 4, 5) # Atoms (known as symbols to Ruby people) # Think of them as an open-ended enumeration atom = :up_and_atom # Dicts (also known as hashes to Ruby people) dict = {:foo => 1, :bar => 2, :baz => 3} # Strings (unlike Erlang, Reia has a real String type!) string = "I'm a string! Woohoo I'm a string! #{'And I interpolate too!'}" # Ranges range = 0..42 # Funs (anonymous functions, a.k.a. lambdas, procs, closures, etc.) # Calling me with plustwo(40) would return 42 plustwo = fun(n) { n + 2 } # Modules (collections of functions) # Calling Plusser.addtwo(40) would return 42 module Plusser def addtwo(n) n + 2 end end # Classes (of immutable objects. Once created objects can't be changed!) class Adder # Reia supports binding instance variables directly when they're passed # as arguments to initialize def initialize(@n); end def plus(n) @n + n end end # Instantiate classes by calling Classname(arg1, arg2, ...) # For you Ruby people who want Classname.new(...) this is coming soon! fortytwo = Adder(40).plus(2) # Function references can be obtained by omitting parens from a function call, # like JavaScript or Python numbers = [1,2,3] reverser = [1,2,3].reverse # Function references can be invoked just like lambdas reversed = reverser() # reversed is now [3,2,1] # You can add a ! to the end of any method to rebind the method receiver to # the return value of the given method minus the bang. numbers.reverse!() # numbers is now [3,2,1] # List comprehensions doubled = [n * 2 for n in numbers] # doubled is [6,4,2]

Language features

Feature Supported Token Example
Comments
# A comment
Line Comments #
# A comment
Assignment =

HackerNews discussions of Reia

title date score comments
Reia - Ruby's powerful syntax with Erlang concurrency and fault-tolerance 11/10/2010 2 1
java-properties.html · reia.html · tornado.html

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