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

Erlang/OTP 25 Highlights May 18, 2022 by Kenneth Lundin: OTP 25 is finally here. This post will introduce the new features that I am most excited about.
Erlang/OTP 25.0 Release May 18, 2022 by Henrik Nord: Erlang/OTP 25 is a new major release with new features, improvements as well as a few incompatibilities.
Fast random integers May 12, 2022 by Raimo Niskanen: When you need “random” integers, and it is essential to generate them fast and cheap; then maybe the full featured Pseudo Random Number Generators in the rand module are overkill. This blog post will dive in to new additions to the said module, ho...

Practical functional programming
for a parallel world

What is Erlang?

What is OTP?

News

Erlang/OTP 25 Highlights

Erlang/OTP 25.0 Release

Fast random integers

Participate

Practical functional programming for a parallel world

What is Erlang?

What is OTP?

News

Erlang/OTP 25 Highlights

Erlang/OTP 25.0 Release

Fast random integers

Participate

Practical functional programming
for a parallel world