result.rb in duckdb-0.9.1.1

- old
+ new

@@ -23,44 +23,48 @@
   #     p row
   #   end
   class Result
     include Enumerable
 
-    ToRuby = {
+    TO_METHODS = Hash.new(:_to_string).merge(
       1 => :_to_boolean,
       3 => :_to_smallint,
       4 => :_to_integer,
       5 => :_to_bigint,
       10 => :_to_float,
       11 => :_to_double,
       16 => :_to_hugeint_internal,
       18 => :_to_blob,
       19 => :_to_decimal_internal
-    }
+    ).freeze
 
-    ToRuby.default = :_to_string
-
     alias column_size column_count
     alias row_size row_count
 
-    def self.use_chunk_each=(val)
-      raise DuckDB::Error, 'chunk_each is not available. Install duckdb >= 0.8.0 and rerun `gem install duckdb`.' unless instance_methods.include?(:chunk_each)
+    class << self
+      def new
+        raise DuckDB::Error, 'DuckDB::Result cannot be instantiated directly.'
+      end
 
-      @use_chunk_each = val
-    end
+      def use_chunk_each=(val)
+        raise DuckDB::Error, 'chunk_each is not available. Install duckdb >= 0.8.0 and rerun `gem install duckdb`.' unless instance_methods.include?(:chunk_each)
 
-    def self.use_chunk_each?
-      !!@use_chunk_each
+        @use_chunk_each = val
+      end
+
+      def use_chunk_each?
+        !!@use_chunk_each
+      end
     end
 
     def each
       if self.class.use_chunk_each?
         return chunk_each unless block_given?
 
         chunk_each { |row| yield row }
       else
-        warn('this `each` behavior will be deprecated in the future. set `Result.use_chunk_each = true` to use new `each` behavior.')
+        warn('this `each` behavior will be deprecated in the future. set `DuckDB::Result.use_chunk_each = true` to use new `each` behavior.')
         return to_enum { row_size } unless block_given?
 
         row_count.times do |row_index|
           yield row(row_index)
         end
@@ -74,10 +78,10 @@
       end
       row
     end
 
     def to_value(row_index, col_index)
-      send(ToRuby[_column_type(col_index)], row_index, col_index)
+      send(TO_METHODS[_column_type(col_index)], row_index, col_index)
     end
 
     def enum_dictionary_values(col_index)
       values = []
       _enum_dictionary_size(col_index).times do |i|