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Elixir

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Elixir is an open source programming language created in 2011 by José Valim.

#29on PLDB 15Years Old 89kRepos
Download source code:
git clone https://github.com/elixir-lang/elixir
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Elixir is a functional, concurrent, general-purpose programming language that runs on the Erlang virtual machine (BEAM). Elixir builds on top of Erlang and shares the same abstractions for building distributed, fault-tolerant applications. Elixir also provides a productive tooling and an extensible design. Read more on Wikipedia...


Example from Riju:
IO.puts("Hello, world!")
Example from hello-world:
#!/usr/bin/env elixir IO.puts "Hello World"
# Hello world in Elixir defmodule HelloWorld do IO.puts "Hello, World!" end
Example from Linguist:
%{"cowboy": {:hex, :cowboy, "1.0.0"}, "cowlib": {:hex, :cowlib, "1.0.1"}, "hackney": {:hex, :hackney, "0.14.3"}, "hound": {:hex, :hound, "0.6.0"}, "httpoison": {:hex, :httpoison, "0.5.0"}, "idna": {:hex, :idna, "1.0.1"}, "phoenix": {:hex, :phoenix, "0.10.0"}, "plug": {:hex, :plug, "0.11.1"}, "poison": {:hex, :poison, "1.3.1"}, "ranch": {:hex, :ranch, "1.0.0"}}
Example from Wikipedia:
task = Task.async fn -> perform_complex_action() end other_time_consuming_action() Task.await task
Elixir Keywords
after and catch do else end false fn in nil not or rescue true when

Language features

Feature Supported Example Token
Standard Library ✓ IO.puts "Hello, World!"
Unicode Identifers ✓ δ = 0.00001
Case Sensitivity ✓
Exceptions ✓ raise "oops, something went wrong"
Pattern Matching ✓ def fib(0), do: 1 def fib(1), do: 1 def fib(n) when n >= 2, do: fib(n-1) + fib(n-2)
Runtime Guards ✓ def abs(number) when number > 0, do: number def abs(number), do: -number
Garbage Collection ✓
Multiline Strings ✓ template = """ This is the first line. This is the second line. This is the third line. """
Infix Notation ✓ seven = 3 + 4
Scientific Notation ✓ 1.23e+45
Anonymous Functions ✓ fn -> IO.puts("hello world") end
Pipes ✓ "Elixir" |> String.graphemes() |> Enum.frequencies()
Streams ✓ https://hexdocs.pm/elixir/Stream.html
Macros ✓ # https://hexdocs.pm/elixir/Macro.html defmodule Example do defmacro macro_inspect(value) do IO.inspect(value) value end def fun_inspect(value) do IO.inspect(value) value end end
Polymorphism ✓ https://hexdocs.pm/elixir/Protocol.html
Range Operator ✓ 1..3
Single Dispatch ✓
Maps ✓ %{key: "value"}
Booleans ✓ true false
Binary Literals ✓ # 0b[01]+
Integers ✓ # \d(_?\d)*
Floats ✓ # \d(_?\d)*\.\d(_?\d)*([eE][-+]?\d(_?\d)*)?
Hexadecimals ✓ # 0x[\da-fA-F]+
Octals ✓ # 0o[0-7]+
Strings ✓ "Hello world" "
Lists ✓ my_list = [1, 2, 3, 4, 5]
Regular Expression Syntax Sugar ✓ ~r/integer: \d+/
Print() Debugging ✓ IO.puts
Message Passing ✓ send(pid, :ping)
Line Comments ✓ # A comment #
Default Parameters Pattern ✓ def multiply(a, b \\ 1) do a * b end
Conditionals ✓ if true do IO.puts("Hello world") end
Assignment ✓ name = "John"
File Imports ✓ # Alias the module so it can be called as Bar instead of Foo.Bar alias Foo.Bar, as: Bar # Require the module in order to use its macros require Foo # Import functions from Foo so they can be called without the `Foo.` prefix import Foo # Invokes the custom code defined in Foo as an extension point use Foo
Comments ✓ # A comment
Disk Output ✓ File.write!("helloworld.txt", "Hello, world!\n")
Shebang ✓ #!/usr/bin/env elixir
Case Insensitive Identifiers X
Multiple Dispatch X
Units of Measure X
Pointers X
Semantic Indentation X
MultiLine Comments X

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