How to add an array to itself n number of times with a specific element in ruby?

Question

ruby

There is an array = ['one', 'two', 'three']
there is counter- can be any positive integer
We need to get such a result, with, supposecounter = 3

[ 'counter 1', 'one',  'two',  'three', 'counter 2', 'one',  'two',  'three', 'counter 3', 'one',  'two',  'three']

Tried to do so

new_arr = []
counter.each_with_index do |arr, index|
new_arr << arr.unshift("counter #{index}")
end

But the problem is that it each_with_indexdoes not work with a number, maybe there is some way to fix this or another solution that can be applied, tell a beginner.

Answer 1

Array.new(counter){|i| [ "counter #{i + 1}", arr ]}.flatten