Ruby - Where's the error?

Question

arr = [1,2,4,2]
puts arr.minmax{|x| x%2==0}

Answer 1

minmax method receives two arguments and the combined comparison operator (<=>) is the only accepted.

th¡s method return an array with two element (the min and max of array) so the correct use of the method would be:

arr.minmax { |x. y| x <=> y }

OUTPUT => [1, 4]

In this link you can check the method info

https://ruby-doc.org/core-2.6.5/Enumerable.html#method-i-minmax