ruby - Most succinct method that takes a single-level hash argument and returns a copy with nil values -

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help me write succinct method takes 1 argument (a single-level hash) , returns copy values set nil.

example input hash

{   email: 'hans@moleman.com',   first_name: 'hans',   last_name: 'moleman' }

returned value

{   email: nil,   first_name: nil,   last_name: nil }

what this?

new_hash = hash[original_hash.keys.zip([])]

take keys of hash, zip empty array pairs of keys nil, , use hash[] convert hash.

or, @mu_is_too_short pointed out in comments, way might less tricky read is:

new_hash = hash[original_hash.keys.map { |k| [k, nil] }]

this alternative, credit @mu.


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