[]

        # Struct.[]

(from ruby core)
---
    struct[name] -> object
    struct[n] -> object

---

Returns a value from `self`.

With symbol or string argument `name` given, returns the value for the
named member:

    Customer = Struct.new(:name, :address, :zip)
    joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
    joe[:zip] # => 12345

Raises NameError if `name` is not the name of a member.

With integer argument `n` given, returns `self.values[n]` if `n` is in
range; see [Array Indexes](Array.html#class-Array-label-Array+Indexes):

    joe[2]  # => 12345
    joe[-2] # => "123 Maple, Anytown NC"

Raises IndexError if `n` is out of range.