Convert A Hash To A Struct In Ruby

Posted By Weston Ganger

I needed a simple way to convert a hash into a Struct in my Rails app. It wasn’t readily obvious how to do so but the answer is pretty simple.

h = {name: 'Foobar', description: 'test'}*h.keys).new(*h.values)

You could take this one step further and create a monkey patch like below if your using this method often:

Hash.class_eval do
  def to_struct(h)*h.keys).new(*h.values)


My ruby gem rearmed-rb provides this monkey patch and many others. It is a collection for helpful methods and monkey patches that can be safely applied on an opt-in basis.

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Article Topic:Software Development - Rails

Date:January 24, 2017