Getting started

Interactive mode
iex 

Scripts - .exs

iex> 40 + 2
42
iex> "hello" <> " world"
"hello world"

$ elixir simple.exs
Hello world from Elixir

iex> 1          # integer
iex> 0x1F       # integer
iex> 1.0        # float
iex> true       # boolean
iex> :atom      # atom
iex> "elixir"   # string
iex> [1, 2, 3]  # list
iex> {1, 2, 3}  # tuple

Atoms

Atoms are constants where their name is their own value. Some other languages call these symbols:

iex> :hello
:hello
iex> :hello == :world
false

Atoms

iex> true == :true
true
iex> is_atom(false)
true
iex> is_boolean(:false)
true

Strings

Lists

Tuples

List or Tuples?

Pattern Matching

Pin operator

Processes

iex> send self(), {:hello, "world"}
{:hello, "world"}
iex> receive do
...>   {:hello, msg} -> msg
...>   {:world, msg} -> "won't match"
...> end
"world"

Processes

iex> receive do
...>   {:hello, msg}  -> msg
...> after
...>   1_000 -> "nothing after 1s"
...> end
"nothing after 1s"

Enumerables

The Enum module provides a huge range of functions to transform, sort, group, filter and retrieve items from enumerables. It is one of the modules developers use frequently in their Elixir code.

Eager vs Lazy

Pipe operator

Tooling

MIX

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$ mix new kv --module KV

* creating README.md
* creating .gitignore
* creating mix.exs
* creating config
* creating config/config.exs
* creating lib
* creating lib/kv.ex
* creating test
* creating test/test_helper.exs
* creating test/kv_test.exs

Books