A Struct is a convenient way to bundle a number of attributes together, using accessor methods, without having to write an explicit class.

The Struct class is a generator of specific classes, each one of which is defined to hold a set of variables and their accessors. In these examples, we’ll call the generated class “CustomerClass,” and we’ll show an example instance of that class as “CustomerInst.”

In the descriptions that follow, the parameter symbol refers to a symbol, which is either a quoted string or a Symbol (such as :name).

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July 1, 2009
4 thanks

Example

User = Struct.new(:name, :phone)

marc = User.new(“Marc”, “555-5555”)

February 12, 2012 - (v1_8_6_287 - v1_9_2_180)
2 thanks

More Examples

Code

class User < Struct.new(:name, :age, :gender) 
end

user = User.new("Matz", 43, "male")
January 28, 2011 - (>= v1_8_7_72)
1 thank

Passing a block with methods

Code example

Google = Struct.new(:address) do
  def latitude
    -1
  end

  def longitude
    -2
  end

  def with_address
    "with #{address}"
  end
end

g = Google.new("Some Addres")

puts g.address
puts g.latitude
puts g.longitude
puts g.with_address

Result

# >> Some Addres
# >> -1
# >> -2
# >> with Some Addres