从整数数组中查找最大的元素

Question

I have an array of ints similar to this:

 values = [[3, 4, 15, 16, 5, 13, 2], [1, 12, 13, 2, 10, -1], [11, 12, 1, 9, -2], [1, -10, -2, -13], [-11, -3, -14], [8, -3], [-11]]

How would I retrieve the index of the largest number, eg 16 == values[0][3] ?

Answer 1

Don't sure I get you correct, but anyway:

1) If you need the largest element:

values.flatten.max

2) If you need largest element from each subarray:

values.map{|x| x.max}

UPD

About indexes:

largest_element = values.flatten.max
values.each_with_index do |e,i|
  if e.include?(largest_element)
    p i
    values[i].each_with_index{|e, i| p i if e == largest_el}
  end
end