Index - Erlang/OTP

fact(1) -> 1; %% Pattern matching for control-flow fact(N) -> N * fact(N-1). %% Recursion to create loops > example:fact(10). %% Interactive shell for fast iterations 3628800 > [{I, example:fact(I)} || I <- lists:seq(1,10)]. [{1, 1}, {2, 2}, {3, 6}, {4, 24}, {5, 120}, {6, 720}, {7, 5040}, {8, 40320}, {9, 362880}, {10, 3628800}]

> Fruits = ["banana","monkey","jungle"]. %% Immutable variables ["banana","monkey","jungle"] > lists:map(fun string:uppercase/1, Fruits). %% Map values using stdlib functions ["BANANA","MONKEY","JUNGLE"] %% Fold over lists using custom functions > lists:foldl(fun(Str, Cnt) -> string:length(Str) + Cnt end, 0, Fruits). 18

> Parent = self(). %% Get own process id <0.376.0> > Child = spawn(fun() -> receive go -> Parent ! lists:seq(1,100) end end). <0.930.0> > Child ! go. %% Send message to child go > receive Reply -> Reply end. %% Receive response from child [1,2,3,4,5,6,7,8,9,10,11|...]

-spec even(list(integer())) -> list(integer()). even(Numbers) -> mapreduce(Numbers, fun(Number) -> Number rem 2 == 0 end). mapreduce(Numbers, Function) -> Parent = self(), [spawn(fun() -> Parent ! {Number, Function(Number)} end) || Number <- Numbers], lists:flatten( [receive {Number, true} -> Number; _ -> [] end || Number <- Numbers]).

What is Erlang?

Erlang is a programming language used to build massively scalable soft real-time systems with requirements on high availability. Some of its uses are in telecoms, banking, e-commerce, computer telephony and instant messaging. Erlang's runtime system has built-in support for concurrency, distribution and fault tolerance.

Erlang Quickstart

What is OTP?

OTP is set of Erlang libraries and design principles providing middle-ware to develop these systems. It includes its own distributed database, applications to interface towards other languages, debugging and release handling tools.

Getting Started with OTP

News

The Many-to-One Parallel Signal Sending Optimization November 05, 2021 by Kjell Winblad: This blog post discusses the parallel signal sending optimization that recently got merged into the master branch (scheduled to be included in Erlang/OTP 25). The optimization improves signal sending throughput when several processes send signals ...
Announcing the new erlang.org November 02, 2021 by Lukas Larsson: A new version of erlang.org has been launched!
Announcing the new Erlang Forums October 26, 2021 by Kenneth Lundin: We are pleased to announce the launch of the brand new Erlang Forums.

Practical functional programming
for a parallel world

What is Erlang?

What is OTP?

News

The Many-to-One Parallel Signal Sending Optimization

Announcing the new erlang.org

Announcing the new Erlang Forums

Participate

Practical functional programming for a parallel world

What is Erlang?

What is OTP?

News

The Many-to-One Parallel Signal Sending Optimization

Announcing the new erlang.org

Announcing the new Erlang Forums

Participate

Practical functional programming
for a parallel world