从哈希值打印值返回ruby中的nil

Question

I have the following code:

person1 = { :first => "bob", :last => "perry"}
person2 = { :first => "fred", :last => "perry"}
person3 = {:first => "jane", :last =>"perry"}
family = {:dad => person1, :son => person2, :mum => person3}

puts (family[:dad][:last],family[:dad][:first])

It prints out:

perry
bob
nil

Why does it also output nil?

Answer 1

Because you're in irb , which prints out the return value of the last method run, and puts returns nil.

^{(Or in rails c .)}