Ruby Sort Array of Arrays by Child Element

Question

I have an "array of arrays" that has two values included at a time.

array = [[:tuesday, 0.25], [:monday, 1], [:thursday, 0.75]]

I'd like to use the number in the "child" array to sort the "parent" array in descending order. The result would look like:

array = [[:monday, 1], [:thursday, 0.75], [:tuesday, 0.25]]

I'm not too sure where to begin here.

Answer 1

You can pass a block to the sort method like this:

array.sort { |a, b| b[1] <=> a[1] }

Answer 2

I would be inclined to write

array.sort_by(&:last).reverse