Ruby - day 2: hash to array and array to hash

HashToArrayAndReverse.rb

a1 = ["a", 1, "b", 2]
h1 = Hash[*a1]
puts "a1=" + a1.to_s
puts "h1=" + h1.to_s


a2 = [["a", 1], ["b", 2]]
h2 = Hash[*a1] #splat operator (*) used
puts "a2=" + a2.to_s
puts "h2=" + h2.to_s

puts h1 == h2

a1 = h1.to_a
puts "a1=" + a1.to_s