How to cleanly initialize attributes in Ruby with new?

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You can just iterate over the keys and invoke the setters. I prefer this, because it will catch if you pass an invalid key.

class Foo
  attr_accessor :name, :age, :email, :gender, :height

  def initialize params = {}
    params.each { |key, value| send "#{key}=", value }
  end
end

foo = Foo.new name: 'Josh', age: 456
foo.name  # => "Josh"
foo.age   # => 456
foo.email # => nil

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