Question

How do I turn an Array into a Hash with values of 0 without an each loop.

For example, given this array:

[1, 2, 3, 4]

I want to get this hash:

{"1"=>0, "2"=>0, "3"=>0, "4"=>0}

Answer 1

I’m a fan of simple, and I can never remember exactly how crazy things #inject or Hash constructor arguments work.

array = [1, 2, 3, 4]
hash = {}

array.each do |obj|
  hash[obj.to_s] = 0
end

puts hash.inspect # {"1"=>0, "2"=>0, "3"=>0, "4"=>0}