How to replace a hash key with another key

Question

I have a condition where, I get a hash

  hash = {\"_id\"=>\"4de7140772f8be03da000018\", .....}

and I want this hash as

Answer 1

you can do

hash.inject({}){|option, (k,v) | option["id"] = v if k == "_id"; option}

This should work for your case!