elixir-overview.md

Elixir Overview

• Elixir Docs
• Binaries, Strings, and Char Lists
• Erlang Docs
• Erlang Reference
• Erlang Standard Library
• OTP
• Erlang BIFs

IEx and Signals

• CTRL-C sends INT ("interrupt") signal. Opens BREAK menu.
• CTRL-C CTRL-C same as abort (CTRL-C a ENTER).
• CTRL-D sends EOT ("end of transmission") signal. Usually, exits a REPL or Shell, but not iex.
• CTRL-Z sends TSTP ("terminal stop") signal. Puts process into the background.
• CTRL-\ sends QUIT signal. (Note: does not dump core like other processes.)
• System.halt
• How to quit the Elixir shell (IEx)?
• How do I quit the Erlang shell?

Kernel

• Kernel
• :kernel

Math

• :math

IO

• Path
• IO
• :io
• StringIO
• File
• Process.group_leader/0
• (STDIN) IO.stream/2 IO.stream(:stdio, :line)
• (STDOUT) :stdio IO.puts(:stdio, "All right")
• (STDERR) :stderr IO.puts(:stderr, "Oops")
• IO.gets/2

:stdio---a shortcut for :standard_io, which maps to the current Process.group_leader/0 in Erlang
:stderr---a shortcut for the named process :standard_error provided in Erlang

• IO And The File System

Strings

• String
• String.to_charlist/1
• :binary.bin_to_list/1
• (stringf) :io.format/2
• (stringf) :io_lib.format/2
• Regex

Date/Time

• Date
• DateTime
• Time
• Calendar
• Calendar.ISO
• strftime() (3p) Calendar, (3p) Timex

The VM provides three time measurements:

1. os_time/0---the time reported by the OS. This time may be adjusted forwards or backwards in time with no limitation;
2. system_time/0---the VM view of the os_time/0. The system time and OS time may not match in case of time warps although the VM works towards aligning them. This time is not monotonic (i.e., it may decrease) as its behaviour is configured by the VM time warp mode;
3. monotonic_time/0---a monotonically increasing time provided by the Erlang VM.

Time and Time Correction in Erlang

Net

• URI

Shell / Command Line

• OptionParser
• System
• System.cmd/3
• :os
• :os.cmd/1
• System.argv/0
• System.get_env/0
• System.halt/1

Security

• :crypto
• :crypto.strong_rand_bytes/1
• (3p) comeonin
• (3p) secure_random

Introspection

• IO.inspect
• IEx.pry/1

File Formats

• EEx
• (3p) CSV
• (Serialize) External Term Format
• (Serialize) :erlang.term_to_binary/1
• (Deserialize) :erlang.binary_to_term/1
• :zip
• :zlib
• Logger
• ExUnit

Patterns / Data Structures

• :queue
• :rand

Other

• :digraph
• :digraph_utils

Filesystem Watcher

• (3p) fs
• (3p) fswatch

Tools

• dialyzer
• :observer.start/0
• (3p) Credo

3rd Party Docs

• Awesome Elixir Libraries
• Community Style Guide
• Credo Style Guide

3rd Party Libraries

• Ecto
• Postgrex
• Plug
• Cowboy
• Poolboy
• Redix

Frameworks

• Phoenix
• Nerves