class DataStructure

self.instance?(obj = nil). @description

Predicate. Verifies an object is a Array, Hash, Queue, or SizedQueue
instance.

@param obj [.]

Any object.

@return [TrueClass, FalseClass]

True in the case the object's class or an ancestor class is Array, Hash,
Queue, SizedQueue, or Node. False otherwise.

# File lib/data_structure_impl.rb, line 32
def self.instance?(obj = nil)

  boolean = false
  TYPES.each { |type|

    if (obj.is_a?(type))
      boolean = true
    end

  }
  return boolean

end

self.type?(type = nil). @description

Predicate. Verifies a type is a DataStructure type.

@param type [.]

Any type.

@return [TrueClass, FalseClass]

True in the case the type is Array, Hash, Queue, or SizedQueue, or,
an ancestor is in the type set. False otherwise.

# File lib/data_structure_impl.rb, line 54
def self.type?(type = nil)

  element       = self.types_element?(type)
  element_child = self.type_child?(type)
  boolean       = (element || element_child)
  return boolean

end

self.type_child?(type = nil). @description

Predicate. Verifies a type is a data structure type's child.

@param type [.]

Any identifier.

@return [TrueClass, FalseClass]

True in the case a TYPES element is type's ancestor. False otherwise.

# File lib/data_structure_impl.rb, line 82
def self.type_child?(type = nil)

  boolean        = false
  type_ancestors = type.ancestors()
  type_ancestors.each { |ancestor|

    if (types_element?(ancestor) && !types_element?(type))
      boolean = true
    end

  }
  return boolean

end

self.types(). @description

Gets the types.

@return [Array]

The TYPES array.

# File lib/data_structure_impl.rb, line 19
def self.types()
  return TYPES
end

self.types_element?(type = nil). @description

Verifies an identifier is a TYPES element.

@param type [.]

Any identifier.

@return [TrueClass, FalseClass]

True in the case the argument is a TYPES element. False otherwise.

# File lib/data_structure_impl.rb, line 70
def self.types_element?(type = nil)
  boolean = TYPES.include?(type)
  return boolean
end