Cheat sheet for ruby syntax

Ruby Syntax cheat sheet

# Comments start with a hash symbol.

# Casing rules:
variables_all_go_in_snake_case
method_names_in_snake_case_too
CONSTANTS_ARE_IN_SCREAMING_SNAKE_CASE

# Basic objects:
strings_have_single_quotes = 'A string'
strings_have_double_quotes_too = "A different string"
strings_can_be_interpolated = "I am interpolated with the integer #{ 12 }"

symbols_have_a_colon = :a_symbol

numbers_are_bare = 1
nil_is_bare_too = nil
and_true = true
and_false = false

arrays_use_square_brackets = [ 1,2,3 ]
hashes_use_curly_brackets = { :key => "value", :other_key => "other value" }
ranges_are_easier_with_round_brackets = (1..5)

# Defining a method
def method_name(any, arguments)
  do_a_thing_here
  with = any + arguments
end

# Calling a method
any_object.some_method(any, argmuents)

#Simple if statements
if some_conditional
  do_this
end

# Complex if statements
if some_conditional
  run_only_this_bit
elsif some_other_conditional
  run_this_bit_instead
else
  do_this
end

# Unless statements
unless some_conditional
  do_this
end

# Inline if statements
do_a_thing if some_conditional

# Inline unless statements
do_a_thing unless some_conditional

# Ternary statements
some_conditional ? do_this : or_do_this

# Blocks (for the each method)
[1,2,3].each do |number|
  do_a_thing_with(number)
end