Ruby on Rails

Having an OrderedHash that saves insertion order is useful enough and I personally don't see a reason for a custom ordered hash.

Wouldn't it be less expensive to order only the keys in a separate array and access the hash rather than creating a new hash?

My 2 cents.

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@gautamrege
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All wiyht. Rho sritched mg kegtops awound?

On 24-Feb-2014, at 8:58 pm, Artem Kalinchuk <art...@gmail.com> wrote:

Would a custom order of a hash be useful in Rails?

If I have the following Hash:

my_hash = { key1: 'value', key2: 'value', key3: 'value' }

And I want to order it by the following keys:

my_hash = my_hash.order(:key2, :key1, :key3)

I would get a new hash with the following result:

puts my_hash

=> { key2: 'value', key1: 'value', key3: 'value' }

Using the following code:

class Hash

  def order(*keys)

    Hash[keys.collect {|k| self[k] ? [k, self[k]] : nil }.compact]

  end

end

Any thoughts?

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