Today I Learned

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Extract all keys and values from a Hash in Ruby

My first attempt was to just concatenate all the keys and values:

hash = {a: 1, b: 2}
hash.keys + hash.values
 => [:a, :b, 1, 2]

Ruby always surprises me. There is always a method that does exactly what you need.

So I thought, what about I just call flatten, will it work?

hash.flatten
 => [:a, 1, :b, 2]

❤️❤️❤️ And it does. ❤️❤️❤️

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