marcelmorgan · January 4, 2016 20:49
diff --git a/array_of_constants.rb b/array_of_constants.rb
 # Lets say we need to have a list of all our states
 # we could do it like this

 ON     = 'on'
 OFF    = 'off'
 CLOSED = 'closed'

 STATES = [ON, OFF, CLOSED]

 # but adding a new state means adding it in 2 places

 # versus

 STATES = [
  ON     = 'on',
  OFF    = 'off',
  CLOSED = 'closed',
 ]

 # here we only need to add it once
	# Lets say we need to have a list of all our states
	# we could do it like this

	ON = 'on'
	OFF = 'off'
	CLOSED = 'closed'

	STATES = [ON, OFF, CLOSED]

	# but adding a new state means adding it in 2 places

	# versus

	STATES = [
	ON = 'on',
	OFF = 'off',
	CLOSED = 'closed',
	]

	# here we only need to add it once