Index - Erlang/OTP

fact(0) -> 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 Optimizations in Erlang/OTP 27 April 23, 2024 by Björn Gustavsson: This post explores the new optimizations for record updates as well as some of the other improvements. It also gives a brief historic overview of recent optimizations leading up to Erlang/OTP 27.
Erlang/OTP 27.0 Release Candidate 2 March 20, 2024 by Björn Gustavsson: Erlang/OTP 27.0-rc2 is the second release candidate for OTP 27
Erlang/OTP 27.0 Release Candidate 1 February 14, 2024 by Björn Gustavsson: Erlang/OTP 27.0-rc1 is the first release candidate for OTP 27

Practical functional programming
for a parallel world

What is Erlang?

What is OTP?

News

The Optimizations in Erlang/OTP 27

Erlang/OTP 27.0 Release Candidate 2

Erlang/OTP 27.0 Release Candidate 1

Participate

Practical functional programming for a parallel world

What is Erlang?

What is OTP?

News

The Optimizations in Erlang/OTP 27

Erlang/OTP 27.0 Release Candidate 2

Erlang/OTP 27.0 Release Candidate 1

Participate

Practical functional programming
for a parallel world