Ruby convert an Array to Hash values with specific keys

Question

Is there a way to pull the values from an array and assign them each a unique key in Ruby?

I want to be able to turn this array:

["12", "21", "1985"]

Into this hash:

{:month => "12", :day => "21", :year => "1985"}

I would rather not assign each value individually, like this:

arr = ["12", "21", "1985"]
bday_hash = {:month => arr[0], :day => arr[1], :year => arr[2]}

Answer 1

You can use #zip

your_array = ["12", "21", "1985"]
keys = ['month', 'day', 'year']
keys.zip(your_array).to_h

Answer 2

You can take array of keys, zip it with values and then convert to hash

keys = [:month, :day, :year]
values = ["12", "21", "1985"]
Hash[keys.zip(values)]
# => {:month=>"12", :day=>"21", :year=>"1985"} 

Answer 3

Here are two other ways to obtain the desired hash.

arr_values = ["12", "21", "1985"]
arr_keys   = [:month, :day, :year]

[arr_keys, arr_values].transpose.to_h
  #=> {:month=>"12", :day=>"21", :year=>"1985"}

arr_keys.each_index.with_object({}) { |i, h| h[arr_keys[i]] = arr_values[i] } 
  #=> {:month=>"12", :day=>"21", :year=>"1985"}