Using nil.to_a or whatever.to_a in ruby

Ruby is a programming language for developer happiness and productivity for customers. Here is a quick happiness and productivity tip:

	#You have seen something like this, if null replace with a blank array
	an_array = (another_array || [] ) + (yet_another_array || [])
	#But you could do this as well
	an_array = another_array.to_a + yet_another_array.to_a
	#Or you have seen this
	an_array = another_array + (an_element_or_array.is_a?(Array) ? an_element_or_array : [an_element] )
	#But you could do this
	an_array = another_array + an_element_or_array.to_a
	Happy? I am happy!

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