Erlang (programming language)/Tutorials

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Tutorials relating to the topic of Erlang (programming language).

Erlang Language Programming Tutorials

Overview

Basic Erlang

Terms
Pattern Matching
Expressions
Functions
Guards
Modules
Errors
Processes and Messages
Timeouts
Macros
Techniques of Recursion
List Comprehensions
List Comments

Syntax

Functions are defined by the domain of the arguments and the number of arguemnts. A function ends with a period. A function over a particular domain of values is separated by a semicolon.

fact(0) -> 1;
fact(N) when is_integer(N) -> 
    fact(N-1)*N.

Simple Types

Basic types in erlang include:

  • atom - alice
  • integer - 3
  • float - 3.1415
  • pid - a process id number <0.42.0>
  • list - [ things in square brackets ]
  • tuple - { things in curly braces }

Advanced Types

  • binary - a binary data block
  • function - a function, F = fun(X) -> X*X end.
  • port - a path for data to flow to the outside world
  • reference - a unique id over all processes
  • record - the standard erlang data structure

Popular Modules

Math
lists
regexp: Regular Expressions

Example programs

Hello World (Serial)
Hello World (parallel)
Prime Sieve with Linda
Autonomous Agents in Erlang -- def: Autonomous Agent.

Advanced OTP

Databases

ETS programming

Mnesia

Advanced Erlang

Making parsers with yecc
Evaluation

Projects using erlang

  • CouchDB - a scalable database for Apache
  • Wings3D - a 3-D editor

References

1 - Erlang Man Pages at Erlang,org