def for_each(arr)
arr.each do |element|
case element
when Array
element.each do |e|
p e
end
else
p element
end
end
end
array = [1, 4, 5, [4, 5, 6], [7, 4, 3]]
irb(main):013:0> array = [1, 4, 5, [4,5,6], [7,4,3]]
=> [1, 4, 5, [4, 5, 6], [7, 4, 3]]
irb(main):014:0> for_each(array)
1
4
5
4
5
6
7
4
3