Erlang (programming language)/Tutorials

Erlang Language Programming Tutorials

Basic Erlang

Terms

Pattern Matching

Expressions

Functions

Guards

Modules

Errors

Processes and Messages

Timeouts

Macros

Techniques of Recursion

List Comprehensions

List Comments

Syntax

Syntax of functions

Functions are defined by the domain of the arguments and the number of arguemnts. A function ends with a period. A function defined over differnt domains are separated by semicolons. A fact function gives an answer that is sensitive to the domain of the input. With strings it gives a fact. With counting numbers it gives the factorial function.

fact("aloha") -> "Aloha is a greating";
fact(String) when is_a_list(String) -> 
    "no fact is known about " ++ String;
fact(0) -> 1;
fact(N) when is_integer(N) and (N > 0) -> 
    fact(N-1)*N;
fact(N) when N < 0 -> error.

Macros

-define(LIKERT_SCALE, lists:seq(1, 5)).

A = LIKERT_SCALE.

Popular Modules

lists

regexp: Regular Expressions

Example programs

Autonomous Agents in Erlang

See definition of Autonomous Agent.

References

1 - Erlang Man Pages at Erlang,org