Arrays

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Prefer literal arrays & hash creation, unless you need to pass parameters to their constructors.

	# no bueno
	hash = Hash.new
	arr = Array.new
	
	# bueno
	hash = {}
	arr = []

Prefer %w syntax to literal array syntax when you need an array of words.

	#ick
	STATES = ['draft', 'open', 'closed']
	
	#yum
	STATES = %w(draft, open, closed)

Prefer %i to literal array syntax when you need an array of symbols.

	#no-no
	ice_cream = [:vanilla, :chocolate, :rocky_road]
	
	#yes-yes
	ice_cream = %i(vanilla, chocolate, rocky-road)

Avoid creating large gaps in arrays

	# no good
	arr = []
	arr[100] = 1
	
	# Now you've got a mess of nils