Ruby array to hash with params

Question

I have an array:

 arr = ["dog", "cat", "eel"]

And I'd like to convert it into a JSON like so:

'{"dog": {}, "cat": {}, "eel": {} }'

And NOT:

'{"dog"=> {}, "cat"=> {}, "eel"=> {} }'

I've tried using:

res = arr.each_with_object({}) { |k,h| h[k] = {} }

I feel like I'm missing something quite obvious. Is there a way to single quote it upon response?

Arup Rakshit · Accepted Answer · 2014-01-07 13:24:31Z

6

Try the below code :

require 'json'

arr = ["dog", "cat", "eel"]
puts Hash[arr.each_with_object({}).to_a].to_json
# >> {"dog":{},"cat":{},"eel":{}}
puts Hash[arr.map{|e| [e,{}]}].to_json # you can do this way also
# >> {"dog":{},"cat":{},"eel":{}}

edited Jan 7, 2014 at 13:24

answered Jan 7, 2014 at 13:15

Arup Rakshit

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