# Set the last item.
	# Is equivalent with `self[length-1] = item`.
	#
	#     var a = [1,2,3]
	#     a.last = 10
	#     assert a == [1,2,10]
	#
	# If the sequence is empty, `last=` is equivalent with `self[0]=` (thus with `first=`)
	#
	#     var b = new Array[Int]
	#     b.last = 10
	#     assert b == [10]
	fun last=(item: E)
	do
		var l = length
		if l > 0 then
			self[l-1] = item
		else
			self[0] = item
		end
	end