Store scope and type as Symbols

for lower memory-footprint

README.adoc

@@ -101,8 +101,8 @@ language.alpha2               # => :fr   (alias for #iso639_1)
 language.alpha3               # => :fra  (alias for #iso639_3)
 language.alpha3_bibliographic # => :fre  (alias for #iso_639_2b)
 language.alpha3_terminology   # => :fra  (alias for #iso_639_2t)
-language.type                 # => "living"
-language.scope                # => "individual"
+language.type                 # => :living
+language.scope                # => :individual
 
 language.extinct?             # => false
 language.living?              # => true

lib/languages/language.rb

@@ -7,13 +7,13 @@ class Language
 
     attr_reader :iso639_1, :iso639_2b, :iso639_2t, :iso639_3, :scope, :type, :name # , :comment
 
-    def initialize(csv_attributes) # rubocop:disable Metrics/AbcSize
+    def initialize(csv_attributes) # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity
       @iso639_3 = csv_attributes.fetch(:id).to_sym
       @iso639_2b = csv_attributes.fetch(:part2b)&.to_sym
       @iso639_2t = csv_attributes.fetch(:part2t)&.to_sym
       @iso639_1 = csv_attributes.fetch(:part1)&.to_sym
-      @scope = SCOPES.detect { |s| s.chr.upcase == csv_attributes.fetch(:scope) }
-      @type = TYPES.detect { |t| t.chr.upcase == csv_attributes.fetch(:language_type) }
+      @scope = SCOPES.detect { |s| s.chr.upcase == csv_attributes.fetch(:scope) }&.to_sym
+      @type = TYPES.detect { |t| t.chr.upcase == csv_attributes.fetch(:language_type) }&.to_sym
       @name = csv_attributes.fetch(:ref_name)
       # @comment = csv_attributes.fetch(:comment)
     end
@@ -32,7 +32,7 @@ def to_s
 
     TYPES.each do |type|
       define_method "#{type}?" do
-        self.type == type
+        self.type == type.to_sym
       end
     end
 
@@ -41,7 +41,7 @@ def to_s
       method_name = scope.end_with?('language') ? scope : "#{scope}_language"
 
       define_method "#{method_name}?" do
-        self.scope == scope
+        self.scope == scope.to_sym
       end
     end