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Home>Blog>Simple way to get all values from hash

Simple way to get all values from hash

In the ruby from the box, we can't find all the hash values if it's nested.

I suggest an easy way to find all the values using recursion.

Example hash:


hash = {

  a: 2,

  b: { c: 3, d: 4, e: {f: 5}}

}


> hash.values

=> [2, {:c=>3, :d=>4, :e=>{:f=>5}}]

That's not an option, we need all the values.


def deep_values(array = [], object:)

  object.each do |_key, value|

    if value.is_a?(Hash)

      deep_values(array, object: value)

    else

      array << value

    end

  end

  array

end



> deep_values(object: hash)

=> [2, 3, 4, 5]

If you run the benchmark with this data, we get the following data:


>  puts Benchmark.measure { 100_000.times { hash.values } }

=> 0.028920   0.002643   0.031563 (  0.032759)



>  puts Benchmark.measure { 100_000.times { deep_values(object: hash ) } }

=> 0.140439   0.003318   0.143757 (  0.146637)

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