Sorting an array by two values

Question

Suppose I have

an_array = [[2, 3], [1, 4], [1, 3], [2, 1], [1, 2]]

I want to sort this array by the first value of each inner array, and then by the second (so the sorted array should look like this: [[1, 2], [1, 3], [1, 4], [2, 1], [2, 3]])

What's the most readable way to do this?

Answer 1

This is the default behavior for sorting arrays (see the Array#<=> method definition for proof). You should just be able to do:

 an_array.sort