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size_x = 3 #something
size_y = 4
a = Array.new(size_x) { |x| x = Array.new(size_y) }
a.each do |xs|
	xs.each do |ys|
		ys = 1
	end
end
puts a.inspect

Success #stdin #stdout 0.01s 7412KB

stdin

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Standard input is empty

stdout

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[[nil, nil, nil, nil], [nil, nil, nil, nil], [nil, nil, nil, nil]]

https://ideone.com/OHsI3E

language:

Ruby (ruby 2.5.5)

created:

visibility:

public

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