h4cc/elixir_symbols.md

## elixir_symbols.md

      
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              elixir_symbols.md
            
          
    Symbols used in Elixir

A list of all not symbols and notations of elixir.
Tried to have a base for comparision for other programming languages.
Operators


=== (strict)
!== (strict)
== (relaxed)
!=
&&
||
!


, >=, <, <=


+, -, *, /, div, rem
<> (binary concat)
++ (list concat)
-- (list diff)

Types


:foo (atom)
{1, 2} (tple)
[1, 2, 3] (list)
[1 | [2, 3]]
[a: 1, b: 2] (keyword list)
<< 65, 66 >> or "AB" (binary string)
1..9 (range)

Functions


fn params [guard] -> body end
function do params [guard] -> body end
func.() (calling a anonymous function from a variable)
&(&1, &2) (closure shortcut)
def name(params) [guard] do
expression
end
def name(params) [guard], do: expression
parameter // 42 (default parameter)
defp ... (private function)
&module.function/arity
defmodule ...
require ...
use ...
import Module, only: foo, except: bar
alias Module, as: M
:erlang.function() (calling a erlang function)
when [guard] (pattern matching guard)

List Comprehensions


lc x inlist list, y inbits binary, x < y, do: ...
bc ... inbits ..., guard, do: ...

Control flow


something, do: ...
else, rescue, try, ensure
a |> b() (pipeline operator)
if expr do ... else ... end
condition do matcher -> expr end
case expr do matcher -> expr end

Regex and Sigils


%r{pattern]opts (regex)
%type{content} (sigil)

Messages


pid <- message (Sending message)
receive do
matcher -> expression
after 42 -> expression
end

Constants


_MODULE_
_FILE_
_DIR_
_ENV_
_CALLER_