erlang

123    - Numbers
1.2    - Float
2#110  - Binary 6
{,}    - Tuples
[,]    - Lists (also "strings")
"ab"   - A shortcut for [97,98]
atom   - An atom
'atom'

Var = 1.        - Setting a variable (constant).
1 = Var.        - Pattern matching -- a bit like 1 == $var
[a|[a]].        - Cons -- [a,a]
[a] ++ [a]      - [a,a]
[a] -- [a]      - []
hd([1,2,3,4]).  - 1
tl([1,2,3,4]).  - [2,3,4]

[2*N || N <- [1,2,3,4]].             - [2,4,6,8] -- List comprehension - a bit like "map" here
[X+Y || X <- [1,2], Y <- [2,3]].     - [3,4,4,5] -- 1+2, 1+3, 2+2, 2+3
[X || X <- [1,2,3,4], X rem 2 == 0]. - [2,4] -- a constraint
Users = [{brian, admin},
         {bob, banned},
         {tim, admin}].
[X || {X, admin} <- Users].          - [brian,tim] -- Working like a "select" or constraint



http://learnyousomeerlang.com/modules