What does ruby && operator return

testing-and-op.rb

# nil and Truthy => nil
x = nil
y = Object.new
puts "when x=#{x.class} and y=#{y.class} then x && y returns #{(x && y).inspect} => x"

x = nil
y = true
puts "when x=#{x.class} and y=#{y.class} then x && y returns #{(x && y).inspect} => x"

# nil and falsy => nil
x = nil
y = false
puts "when x=#{x.class} and y=#{y.class} then x && y returns #{(x && y).inspect} => x"

x = nil
y = nil
puts "when x=#{x.class} and y=#{y.class} then x && y returns #{(x && y).inspect} => x"

# false and truthy => false
x = false
y = true
puts "when x=#{x.class} and y=#{y.class} then x && y returns #{(x && y).inspect} => x"

x = false
y = Object.new
puts "when x=#{x.class} and y=#{y.class} then x && y returns #{(x && y).inspect} => x"

# false and nil => false
x = false
y = nil
puts "when x=#{x.class} and y=#{y.class} then x && y returns #{(x && y).inspect} => x"

# true and falsy => falsy
x = true
y = nil
puts "when x=#{x.class} and y=#{y.class} then x && y returns #{(x && y).inspect} => y"

x = true
y = false
puts "when x=#{x.class} and y=#{y.class} then x && y returns #{(x && y).inspect} => y"

# truthy & truthy => last truthy
x = Array.new
y = Object.new
puts "when x=#{x.class} and y=#{y.class} then x && y returns #{(x && y).class} => y"