How to convert an array of string integers to an array of integers? Ruby

I have an array:

all_ages = ["11", "9", "10", "8", "9"]

and I want to convert it to an array of integers to hopefully make it easier to add them all together.
Any help greatly appreciated, looking for level one solutions.

>Solution :

all_ages = ["11", "9", "10", "8", "9"]

Code

p all_ages.map(&:to_i).sum

Or

p all_ages.map { |x| x.to_i }.sum

Output

47