Class: MARC::Subfield

Inherits:
Object
  • Object
show all
Defined in:
lib/marc/subfield.rb

Overview

A class that represents an individual subfield within a DataField. Accessor attributes include: code (letter subfield code) and value (the content of the subfield). Both can be empty string, but should not be set to nil.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(code = "", value = "") ⇒ Subfield

Returns a new instance of Subfield.



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# File 'lib/marc/subfield.rb', line 10

def initialize(code = "", value = "")
  # can't allow code of value to be nil
  # or else it'll screw us up later on
  @code = code.nil? ? "" : code
  @value = value.nil? ? "" : value
end

Instance Attribute Details

#code ⇒ Object

Returns the value of attribute code.



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# File 'lib/marc/subfield.rb', line 8

def code
  @code
end

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/marc/subfield.rb', line 8

def value
  @value
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/marc/subfield.rb', line 17

def ==(other)
  if !other.is_a?(Subfield)
    return false
  end
  if @code != other.code
    return false
  elsif @value != other.value
    return false
  end
  true
end

#to_s ⇒ Object 



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# File 'lib/marc/subfield.rb', line 29

def to_s
  "$#{code} #{value} "
end