use ruby 3.x patterns

.rubocop.yml

@@ -2,6 +2,9 @@ require:
   - rubocop-rspec
   - rubocop-performance
 
+AllCops:
+  SuggestExtensions: true
+
 Layout/CaseIndentation:
   Enabled: false
 
@@ -87,6 +90,9 @@ Naming/FileName:
 Naming/MethodParameterName:
   Enabled: false
 
+Naming/PredicateName:
+  Enabled: false
+
 RSpec/AnyInstance:
   Enabled: false
 

lib/dbf/column.rb

@@ -9,8 +9,10 @@ class NameError < StandardError
     end
 
     attr_reader :table, :name, :type, :length, :decimal
+
     def_delegator :type_cast_class, :type_cast
 
+    # rubocop:disable Style/MutableConstant
     TYPE_CAST_CLASS = {
       N: ColumnType::Number,
       I: ColumnType::SignedLong,
@@ -24,6 +26,7 @@ class NameError < StandardError
       G: ColumnType::General,
       '+'.to_sym => ColumnType::SignedLong2
     }
+    # rubocop:enable Style/MutableConstant
     TYPE_CAST_CLASS.default = ColumnType::String
     TYPE_CAST_CLASS.freeze
 
@@ -58,7 +61,7 @@ def memo?
     #
     # @return [Hash]
     def to_hash
-      {name: name, type: type, length: length, decimal: decimal}
+      {name:, type:, length:, decimal:}
     end
 
     # Underscored name
@@ -68,18 +71,17 @@ def to_hash
     #
     # @return [String]
     def underscored_name
-      @underscored_name ||= begin
-        name.gsub(/([a-z\d])([A-Z])/, '\1_\2').tr('-', '_').downcase
-      end
+      @underscored_name ||= name.gsub(/([a-z\d])([A-Z])/, '\1_\2').tr('-', '_').downcase
+
     end
 
     private
 
     def clean(value) # :nodoc:
-      value.strip.gsub("\x00", '').gsub(/[^\x20-\x7E]/, '')
+      value.strip.delete("\x00").gsub(/[^\x20-\x7E]/, '')
     end
 
-    def encode(value, strip_output = false) # :nodoc:
+    def encode(value, strip_output: false) # :nodoc:
       return value unless value.respond_to?(:encoding)
 
       output = @encoding ? encode_string(value) : value

lib/dbf/database/foxpro.rb

@@ -105,7 +105,7 @@ def process_field(record, data)
       end
 
       def table_field_hash(name)
-        {name: name, fields: []}
+        {name:, fields: []}
       end
     end
 

lib/dbf/header.rb

@@ -1,19 +1,14 @@
 module DBF
   class Header
-    attr_reader :version
-    attr_reader :record_count
-    attr_reader :header_length
-    attr_reader :record_length
-    attr_reader :encoding_key
-    attr_reader :encoding
+    attr_reader :version, :record_count, :header_length, :record_length, :encoding_key, :encoding
 
     def initialize(data)
       @data = data
       unpack_header
     end
 
     def unpack_header
-      @version = @data.unpack('H2').first
+      @version = @data.unpack1('H2')
 
       case @version
       when '02'

lib/dbf/record.rb

@@ -59,7 +59,7 @@ def to_a
     private
 
     def column_names # :nodoc:
-      @column_names ||= @columns.map { |column| column.name }
+      @column_names ||= @columns.map(&:name)
     end
 
     def get_data(column) # :nodoc:

lib/dbf/table.rb

@@ -165,6 +165,7 @@ def find(command, options = {}, &block)
       end
     end
 
+
     # @return [TrueClass, FalseClass]
     def has_memo_file?
       !!@memo
@@ -278,13 +279,12 @@ def header # :nodoc:
     end
 
     def memo_class # :nodoc:
-      @memo_class ||= begin
-        if foxpro?
-          Memo::Foxpro
+      @memo_class ||= if foxpro?
+        Memo::Foxpro
         else
           version == '83' ? Memo::Dbase3 : Memo::Dbase4
-        end
       end
+
     end
 
     def memo_search_path(io) # :nodoc:

spec/dbf/record_spec.rb

@@ -50,7 +50,7 @@
 
     describe 'if other attributes match' do
       let(:attributes) { {x: 1, y: 2} }
-      let(:other) { instance_double('DBF::Record', attributes: attributes) }
+      let(:other) { instance_double('DBF::Record', attributes:) }
 
       before do
         allow(record).to receive(:attributes).and_return(attributes)